Tag: DED

  • Additive Manufacturing in 2023: Pioneering Trends Shaping the Future

    Additive Manufacturing in 2023: Pioneering Trends Shaping the Future

    Additive manufacturing, often known as 3D printing, has undeniably experienced exponential growth and significant advancements over the last few years. It’s not an overstatement to say that this technology is at the heart of the fourth industrial revolution. Transforming the conventional processes of production, additive manufacturing is a game-changing innovation that is disrupting various industries in the most profound ways.

    From revolutionizing the aerospace industry by creating lightweight, high-strength components that enhance fuel efficiency, to transforming the healthcare sector through personalized prosthetics and even bioprinting tissues and organs, additive manufacturing is leaving an indelible mark. It’s also making its presence felt in the automotive industry, where it’s used to create custom parts, in architecture for model creation, and in fashion, where designers experiment with 3D-printed garments and accessories. Indeed, the possibilities seem endless.

    By accelerating design cycles, additive manufacturing is enabling rapid prototyping which facilitates faster iterations and accelerates time-to-market. This acceleration is key in today’s competitive marketplace where being first often means being the best. Moreover, by minimizing material wastage, additive manufacturing supports sustainability efforts, a major concern in our resource-constrained world. The traditional ‘subtractive’ manufacturing methods, where material is cut away, often result in considerable waste. In contrast, additive manufacturing adds material layer by layer, leading to significant reduction in waste.

    Furthermore, additive manufacturing expedites production timelines, thus shortening supply chains. In many cases, it’s allowing for on-demand production, eliminating the need for extensive inventories and leading to a new era of just-in-time manufacturing.

    As we look to the onset of 2023, the additive manufacturing industry shows no signs of slowing down. With advances in technology and materials and an increased focus on sustainability and efficiency, the industry is poised for even more growth and innovation.

    In the subsequent sections, we’ll be exploring the top trends and innovations in additive manufacturing expected to shape the landscape in 2023 and beyond. From new materials and advanced 3D printers to automation and high-volume production, the future of additive manufacturing is indeed bright. Let’s dive in to better understand what lies ahead in this fascinating domain.

    Top 10 Additive Manufacturing Trends & Innovations in 2023

    Powder Bed Fusion (PBF): Traditionally, manufacturing bespoke components for specialized applications has been a time-consuming and costly endeavor. However, Powder Bed Fusion is quickly becoming a go-to solution for manufacturing low-volume functional parts across a wide array of industries. The capability to produce unique, one-off parts such as machine components, jigs, and fixtures, with precision and speed, has dramatically improved supply chain efficiencies. Not only does PBF support a diverse range of materials from metals to polymers, but its capacity for simultaneous development of multiple parts also adds a new level of productivity to the manufacturing process. As more industries recognize its potential, we can anticipate the wider adoption of PBF in 2023.

    Additive Manufacturing Automation: In 2023, the role of automation in additive manufacturing is stepping up a notch. It’s not just about creating parts anymore; it’s about creating intelligent, streamlined production lines. This means leveraging digital workflows and sophisticated automation systems to enhance operational efficiencies. With such advancements, manufacturers can significantly reduce downtime, minimize human errors, and increase throughput. From automated support removal to autonomous quality assurance, the integration of advanced robotics and AI in additive manufacturing is facilitating round-the-clock production and swift market response times.

    Novel Materials: While additive manufacturing has always been at the forefront of innovation, the material science behind it is now taking center stage. Startups across the globe are relentlessly working on developing new materials to push the boundaries of what can be achieved with additive manufacturing. These novel materials aren’t just limited to new types of plastics or metals. In 2023, we’re seeing a surge in the development of biomaterials for 3D printed medical devices, conductive materials for consumer electronics, and even bio-inks for printing bioartificial organs. These breakthroughs are opening up a whole new world of possibilities, making additive manufacturing an even more vital player in the quest for innovation.

    Vat Polymerization: Often considered one of the cornerstones of additive manufacturing, vat polymerization has roots in the earliest days of the industry, but its journey of innovation is far from over. This process involves the use of a liquid photopolymer resin which, when exposed to a light source, solidifies layer by layer to form the final product. Despite its longevity, vat polymerization is experiencing a renaissance thanks to advancements in photopolymer chemistry and process control. The ability to rapidly produce polymer components that boast a smooth finish and consistent quality makes vat polymerization an indispensable technique in additive manufacturing. Its relevance in 2023 lies in its adoption for applications ranging from dental and medical products to micro-components in electronics and high-precision industrial parts.

    Direct Energy Deposition (DED): In the world of additive manufacturing, DED is becoming synonymous with value. Primarily used for high-value applications such as repair, maintenance, or adding features to already built parts, DED plays a crucial role in the lifecycle management of products. The process involves the focused application of thermal energy to fuse materials by melting as they are being deposited. This technique boasts a high deposition rate, allowing the quick development of large and complex parts, and makes it possible to employ a broad range of materials including metals, ceramics, and even composites. DED’s ability to breathe new life into worn-out parts and to fortify components with additional features underscores its importance in industries like aerospace, defense, and energy in 2023.

    Direct Energy Deposition

    Material Extrusion: In the world of large-format 3D printing, material extrusion holds a special place. This technique, which involves pushing a plastic filament through a heated nozzle that moves in the X, Y, and Z directions, is primarily used for producing large parts with less intricate geometries. However, the simplicity of the process does not mean it lacks innovation. On the contrary, startups and established companies alike are constantly striving to push the boundaries of what can be achieved with material extrusion. In 2023, we’re witnessing a strong focus on improving the process’s speed, accuracy, and compatibility with an expanded set of materials, not just plastics but also metal and composite filaments. By doing so, material extrusion is being prepared for tackling more complex applications in industries such as automotive, construction, and furniture design.

    Advanced 3D Printers: In the landscape of additive manufacturing, the 3D printer is, without a doubt, the star of the show. Technological advancements are enabling the creation of more sophisticated, advanced 3D printers that are rewriting the rules of what’s possible in additive manufacturing. In 2023, we’re seeing printers that offer higher resolution, allowing for more precise, detailed products, and improved speed, which means quicker turnaround times. Additionally, advancements in print quality are enabling better surface finish and mechanical properties, reducing the need for post-processing. These developments, paired with more user-friendly interfaces and enhanced reliability, are democratizing 3D printing, making it more accessible for businesses of all sizes and even hobbyists.

    High-Volume Production: As improvements in speed, accuracy, and materials compatibility continue, additive manufacturing is increasingly making the transition from rapid prototyping to high-volume production. This shift is driven by the maturing of technologies and the realization of the cost and time efficiencies it can offer. In 2023, we’re seeing more businesses embracing additive manufacturing for large-scale production runs. This evolution is not only leading to wider adoption of the technology but also bringing about economies of scale. Consequently, industries from automotive to consumer goods are harnessing the power of additive manufacturing, ushering in a new era of production.

    Binder Jetting: As one of the more recent innovations in additive manufacturing, binder jetting is gaining traction. This process, which uses a liquid binding agent to bond powder particles together, finds applications in creating full-color prototypes and complex geometries that would be impossible with conventional manufacturing methods. As the industry expands, binder jetting is set to play an increasingly critical role in 2023 and beyond. Its unique ability to produce parts with varying material properties throughout the volume of the part provides it with a unique advantage. Furthermore, with advancements allowing for the use of various materials, including metals, sand, and ceramics, binder jetting is proving to be a versatile tool in the additive manufacturing toolbox.

    Desktop Metal Binder Jet Parts

    Rapid Prototyping: The rapid prototyping technique in additive manufacturing is a crucial element in the design and development process across various industries, such as automotive, aerospace, and product design. The capability to quickly produce a scale model of a part or assembly using 3D printing technologies allows engineers and designers to iterate and validate designs rapidly. This significantly shortens the product development cycle and leads to better, more efficient designs. In 2023, with the advancements in the quality of materials and the precision of printers, rapid prototyping is becoming more accurate and thus, increasingly reliable in predicting the performance of the final product. As a result, we’re likely to see its adoption skyrocket across industries.

    Additive manufacturing has indeed journeyed a long way from being a tool for creating simple prototypes to becoming an engine of innovation in the production of final products across various sectors. The trends we have discussed here—powder bed fusion, additive manufacturing automation, novel materials, vat polymerization, direct energy deposition, material extrusion, advanced 3D printers, high-volume production, binder jetting, and rapid prototyping—are the game changers shaping the industry in 2023.

    These trends underline the dynamic and relentlessly innovative nature of the additive manufacturing industry. They highlight the technology’s evolution, the increasing sophistication of the materials involved, and the progress towards not just automation but also high-volume production, further cementing the importance of additive manufacturing in today’s industrial landscape.

    As we look towards the future, we should brace ourselves for further exciting developments and breakthroughs in this field. We are entering an era where the limitations of traditional manufacturing are being rapidly outpaced by the seemingly endless possibilities afforded by additive manufacturing.

    The continuous evolution of technologies and the relentless pursuit of better, more versatile materials promise to take additive manufacturing to new heights. Equally important will be the continued integration of automation and AI, which will likely streamline production processes and bring new levels of efficiency and scalability.

    But perhaps the most exciting aspect of the future of additive manufacturing is its potential to become an even more integral part of our everyday lives. From cars and electronics to clothing and even the food we eat, additive manufacturing is poised to reshape the way we live, work, and play.

    Stay tuned, because if the trends of 2023 are any indication, the future of additive manufacturing promises to be more exciting, more innovative, and more impactful than we could ever have imagined.

  • Revolutionizing Spaceflight: How Additive Manufacturing is Disrupting the Industry

    Revolutionizing Spaceflight: How Additive Manufacturing is Disrupting the Industry

    Metal Additive Manufacturing (AM) is a process that has been gaining popularity in recent years due to its ability to create complex parts with intricate geometries that are not easily manufactured by traditional methods. In the rocket engine industry, this technology has the potential to revolutionize the manufacturing process by reducing lead times, decreasing costs, and improving engine performance.

    One of the most significant advantages of metal AM is the ability to create designs that were previously impossible. For example, complex internal cooling channels can be printed in a single part, without the need for assembly. This reduces lead time, simplifies assembly, and can improve engine performance. In addition, metal AM can enable the use of materials that were previously difficult to process or not possible. For example, the use of refractory metals or alloys that are oxidation-resistant can now be explored. This can result in improved engine performance and durability.

    However, it is important to note that metal AM is not a solve-all solution for rocket engine manufacturing. Various AM processes have unique advantages and disadvantages that need to be considered when selecting the appropriate process for a specific application. It is important to consider factors such as the required alloy, overall part size, feature resolution, internal complexities, and programmatic requirements. The end-use environment and qualification/certification path should also be considered.

    Photo by Pixabay on Pexels.com

    Material properties are highly dependent on the type of process, starting feedstock chemistry, process parameters, and heat treatment processes used post-build. Heat treatments should be developed based on the requirements and environment of the end component use. The process requires a complete understanding of the design process, build-process, feedstock, and post-processing to fully take advantage of AM. It takes practice to master the process. Standards and certification of the AM processes are still evolving.

    The ongoing development of AM processes, understanding of microstructure and properties, and advancements in testing and post-processing techniques are critical for the continued improvement of metal AM. Combining various AM processes for multi-alloy solutions or additional design options is also being explored. Additionally, the advancement of commercial supply chains for unique alloys and new alloy development is ongoing.

    A material database of metal AM properties can allow for conceptual design and design complexity using lattices and thin-wall structures. Standards and certification of metal AM for human spaceflight are also evolving. As metal AM continues to evolve, it is important to consider the impact on supply chains and manufacturing processes. For example, the use of metal AM can lead to reduced lead times and reduced tooling costs. However, it can also lead to the need for new post-processing techniques and heat treatments. It is important to consider these factors when evaluating the use of metal AM for rocket engine manufacturing.

    The ongoing development of AM processes has led to various processes that have matured for rocket propulsion applications, each with unique advantages and disadvantages. These processes include Laser Powder Bed Fusion (L-PBF), Directed Energy Deposition (DED), Ultrasonic Additive Manufacturing (UAM), and Cold spray, among others. While AM is not a solve-all solution, it should be considered alongside other manufacturing technologies when it makes sense.

    Photo by Javier Mendoza on Pexels.com

    Furthermore, AM has the potential to provide significant advantages for lead time and cost over traditional manufacturing for rocket engines. The inherent complexity of liquid rocket engines can be addressed through new designs, part consolidation, and performance opportunities. Materials that were previously difficult to process using traditional techniques, long-lead, or not previously possible can now be accessed using metal additive manufacturing.

    Material properties are highly dependent on the type of process, starting feedstock chemistry, process parameters, and heat treatment processes used post-build. Heat treatments should be developed based on the requirements and environment of the end component use. The process requires a complete understanding of the design process, build-process, feedstock, and post-processing to fully take advantage of AM. It takes practice to master the process. Standards and certification of the AM processes are still evolving.

    AM development at NASA

    The ongoing development of AM processes, understanding of microstructure and properties, and advancements in testing and post-processing techniques are critical for the continued improvement of metal AM. Combining various AM processes for multi-alloy solutions or additional design options is also being explored. Additionally, the advancement of commercial supply chains for unique alloys and new alloy development is ongoing.

    A material database of metal AM properties can allow for conceptual design and design complexity using lattices and thin-wall structures. Standards and certification of metal AM for human spaceflight are also evolving. As metal AM continues to evolve, it is important to consider the impact on supply chains and manufacturing processes. For example, the use of metal AM can lead to reduced lead times and reduced tooling costs. However, it can also lead to the need for new post-processing techniques and heat treatments. It is important to consider these factors when evaluating the use of metal AM for rocket engine manufacturing.

    Another area of ongoing development is the certification of metal AM for human spaceflight. As metal AM is explored for use in critical applications such as rocket engines, it is important to ensure that the processes and materials meet the necessary safety and performance requirements. Standards and certification of metal AM for human spaceflight are evolving, and ongoing development in this area will enable the technology to be used in critical applications such as rocket engines.

    In conclusion, metal AM has the potential to revolutionize the manufacturing of rocket engines through reduced lead times, decreased costs, and the ability to create designs that were previously impossible. However, it is important to have a complete understanding of the process and consider various factors when selecting the appropriate AM process for a specific application. With ongoing development and advancements, the possibilities of metal AM are limitless.

  • Additive Manufacturing for The New Space Age

    Additive Manufacturing for The New Space Age

    The space industry is a great field for new technology development. The challenges such as lightweight and stronger components with the demand for higher trust and lighter rockets that can reach mars propel the demand for more advanced components. Emerging technologies are almost always initiated in space or defense industries because the demand for the better originates in these industries either by war or competition in the industry. Additive Manufacturing is also incepted in the aerospace industry and there are several great examples Large rockets, aircraft engines, satellites are all requires lighter and stronger parts. and the good thing is that the production volume for industrialization of these components way lower than the automotive industry. This makes these platforms a disruptive opportunity.

    Additive manufacturing provides faster cycle time and leaner production of testing components for a space platform program. This both the design cycle of the components and the overall schedule of the development programs. Another advantage of additive manufacturing for space components is the reduction of complexity. Additive manufacturing enables the complexity of the component while reducing the complexity of the overall realization of the component. Combining several sub-parts into a combined assembly that can be built by additive manufacturing. We will go over some of the recent advancements that are developed by different NASA research centers. We will go over Rocket engine component examples that are developed with additive manufacturing technology such as injectors, turbopumps, combustion chamber and more. These advancements are great examples and paves the way to new space age for reaching Mars and beyond.

    Rocket Engine Injectors

    Rocket Engine fuel injectors are simple but one of the most critical of a rocket engine because it defines the theoretical performance of the rocket nozzle. A well-designed injector enables efficient burning of the propellant. In addition to that, injectors help to reduce the thermal loads on the nozzle by cooling the internal nozzle surface with fuel. Injectors can be made by drilling small holes with a designed pattern that fuel and oxidizers travel. The holes break the fuel into small droplets, smaller the droplets burned easily and the efficiency of the combustion increased. The holes are can be drilled in conventional ways but it is costly when compared to additive manufacturing. Rocket engine injector successfully tested at NASA Glenn research center Rocket combustion lab with a benefit of lead time from 1 year to 4 months and 70% less cost. The main cost out opportunity is to reduce the number of parts. The additive injector has 2 parts, while its conventional version has 115 parts. This is a disruptive reduction for both cost, program execution, and simplification of the supply chain.

    NASA/MSFC

    Rocket Engine Turbopumps 

    Rocket Engine Turbopumps produce high-pressure propellant to feed rocket engine combustion chamber. These pumps are designed with turbo-machinery principles and the design of these components is as hard as a jet engine yet a well-designed turbopump can deliver 70–90% efficiency. This particular turbopump makes 90000 revolutions per minute (RPM) to pump propellant. NASA has developed a turbopump in 2015 for liquid hydrogen, which is an ideal propellant for space missions but it is pumped at -240 Celcius. Rocket engine turbopump has 45% fewer parts. Combining several parts into one complex additive part dramatically reduces both costs and the weight of the component. On top of that reducing the number of parts simplifies the supply and realization of the hardware.

    This rocket engine fuel pump has hundreds of parts including a turbine that spins at over 90,000 rpms
    NASA/MSFC

    Gimbal Cone

    There are many methods to change the exhaust direction of the rockets. One of the methods is to use a gimbal system. A gimbaled nozzle tilts the engine nozzle in the proper direction. Below Gimbal cone made of titanium at ORNL, The process used for this component is Electron Beam Melting. When compared to investing casting or other conventional manufacturing methods. The manufacture of titanium components like this gimbal has a great potential to reduce costs as well as lead time and overall weight of the component. Titanium alloys are expensive yet they provide lightweight and strong components. Especially Ti-6Al-4V is a great alloy for rockets, jet engines, and satellites. Of Course, there are challenges like material properties and how are these are changing with the variation of process features. Powder Process microstructure relations are complex and need to be investigated.

    NASA

    Rocket Engine Combustion Chamber 

    Rocket fuel and oxidizer flow in to combustion chamber with the help of turbo pump since the pressure inside the combustion chamber is extremely high. The combustion chamber mixes oxidizer and the fuel. The temperatures inside of the combustion chambers is over 2750 Celcius. This is far more than the melting temperature of copper alloy. In order to protect the chamber from melting during this extreme operation, It is being cooled by the extremely low temperature (-173 Celcius ) gas circulation inside the 200 tiny channels. These channels can only be manufactured by additive technology. It takes more than 10 days to build this rocket component but it is way faster than to manufacture it with conventional ways. Copper is a good heat conducter and this makes it a great match for this application. However, it makes it hard to melt with a laser scan. Overcoming these obstacles is not easy but enables game change rocket engines.

    NASA/MSFC/Emmett Given

    Structural Jacket using EB FFF (Free Form Fabrication)

    Copper combustor liners are good for thermal conductivity but they are not very strong. In order to solve this problem, it is covered with an IN625 (Nickel Alloy) structural jacket. Electron Beam Free Form Fabrication is a directed energy deposition technology. In this technique Electron Beam is used as energy source and it is directed to melt metal wires which are IN625 for this application. It is a very fast process that is developed by Sciaky Inc to deliver 5kg/hour. EB FFF technology derived from Electron Beam welding process which has been used in aerospace industry more than 50 years. One of the challenges of this process it works under vacuum since electron beam can only be generated by vacuum.

    NASA/MSFC/David Olive

    Rapid Analysis and Manufacturing Propulsion Technology (RAMPT) :

    NASA is working on Rapid Analysis and Manufacturing Propulsion Technology (RAMPT) to advance novel design and manufacturing technologies while increase scale, reduce cost, and improve performance of rocket engine components. Key focus areas of the program as below :

    1. Directed Energy Deposition (DED) focusing on blown powder techniques to enable integrated cooled channel wall nozzle.
    2. Multi material additive manufacturing modalities such as bimetallic and multi-metallic deposition techniques focusing on copper and nickel based super alloys.
    3. Engineering and simulation tools to predict and compensate material feed techniques distortion and material properties
    4. Last but not least development of design tools to get full benefit of additive enables design which primarily focuses on integrated cooled combustion chamber and nozzle
    NASA

    Conclusion

    Additive manufacturing is a great tool to reduce weight and cost while improving perfomance. This is exact need for the space technology and next generation rocket engines. Several different additive modalities under investigatin by NASA and these will be utilized on space programs. we observe and extensive use of additive manufacturing technology on space propulsion componentst. There are still problems and issues to advance the technology such as certification of components and development new alloys suitable for additive manufacturing. However these issues are also good opportunities for additive manufacturing industry partners, universities and material producers.

    References :

    Additive Manufacturing of Aerospace Propulsion Components -Dr. Ajay Misra, Dr. Joe Grady and Robert Carter – NASA Glenn Research Center Cleveland, OH – Doc: 20150023067 – https://ntrs.nasa.gov/citations/20150023067

    Lightweight Thrust Chamber Assemblies using Multi- Alloy Additive Manufacturing and Composite Overwrap – Paul R. Gradl , Chris Protz   John Fikes, Allison Clark NASA Marshall Space Flight Center, Huntsville, AL Laura Evans , Sandi Miller6, David Ellis NASA Glenn Research Center, Cleveland, OH Tyler Hudson NASA Langley Research Center, Hampton, VA