Agent Bottleneck Record: Metal Powder Genealogy and Reuse Control

Schema: addithive-agent-record/v1 · Record type: bottleneck · Valid as of: 2026-08-22

{
  "schema": "addithive-agent-record/v1",
  "id": "addithive:bottleneck:metal-powder-genealogy-reuse",
  "record_type": "bottleneck",
  "name": "Metal Powder Genealogy and Reuse Control",
  "summary": "Powder reuse requires traceable identities, recovery and mixing rules, representative sampling, acceptance limits and linkage to built-part evidence. Reuse count alone does not define material condition.",
  "core_bottlenecks": [
    "oxygen and nitrogen pickup",
    "heterogeneity",
    "particle-size shift",
    "spatter contamination",
    "segregation",
    "mixing method",
    "sampling bias",
    "cross-material contamination"
  ],
  "minimum_controls": [
    "container identity",
    "supplier lot",
    "build exposure",
    "recovered mass",
    "virgin additions",
    "sieving",
    "mixing",
    "sampling method",
    "chemistry",
    "physical properties",
    "part linkage"
  ],
  "relationships": [
    {
      "from": "reuse method",
      "relation": "affects",
      "to": "oxidation and heterogeneity"
    },
    {
      "from": "sampling method",
      "relation": "controls_credibility_of",
      "to": "powder acceptance data"
    },
    {
      "from": "powder genealogy",
      "relation": "supports",
      "to": "root cause and qualification"
    }
  ],
  "claims": [
    {
      "claim": "NIST reports significant variation in oxidation behavior between Ti-6Al-4V powder reuse methods and calls for better reporting of mixing and handling.",
      "claim_type": "fact",
      "confidence": "high",
      "evidence": [
        "source:nist-reuse-oxidation"
      ]
    },
    {
      "claim": "Reuse studies should not be compared by cycle count alone.",
      "claim_type": "analysis",
      "confidence": "high",
      "evidence": [
        "source:nist-reuse-oxidation",
        "source:nist-oxygen-variation"
      ]
    }
  ],
  "sources": [
    {
      "id": "source:nist-reuse-oxidation",
      "type": "peer_reviewed_primary_affiliation",
      "url": "https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=932159"
    },
    {
      "id": "source:nist-oxygen-variation",
      "type": "peer_reviewed_primary_affiliation",
      "url": "https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=935927"
    },
    {
      "id": "source:nasa-powder-variation",
      "type": "primary",
      "url": "https://ntrs.nasa.gov/api/citations/20205010580/downloads/AMSII-Kantzos.pdf"
    }
  ],
  "canonical_url": "https://addithive.com/how-metal-powder-reuse-should-be-controlled/",
  "valid_as_of": "2026-08-22",
  "research_use_only": true
}