Two teams receive awards

America Makes and NCDMM announced the winners of the $12.4 million Maturation Initiative for Additive Metals Interchangeability, or MIAMI, call on 12 October. Northrop Grumman leads one team with Georgia Institute of Technology and Contextualize. Fastech leads the other with Pacific Engineering, Auburn University NCAME, Texas A&M University, Prime Tech Data Management, AML3D and Westmoreland Mechanical Testing & Research.

The original call anticipated three awards, while the result names two project leads. It does not divide the $12.4 million between teams or identify selected alloys, weapon systems or parts. No specific material can therefore be described as an approved substitute yet.

What interchangeability means here

The programme aims to validate whether additively manufactured metal can reliably replace a conventional alloy in a defence component. This is more than chemical similarity. Requirements may include mechanical, thermal, fatigue, corrosion and manufacturing conditions, plus evidence that the process meets them repeatedly.

MIAMI seeks shared validated data so platforms do not restart every foundational test. Reuse needs a defined scope: without powder, machine class, parameter window, geometric limits, heat treatment, inspection method and change control, 'the same material' is too broad a claim.

Phase 0 work

Teams first select candidate applications and legacy materials, then produce qualification-ready process, material and feedstock specifications. They analyse where substitution is plausible, with which performance requirements and adoption conditions.

Phase 0 also includes process-control documentation and preliminary room-temperature mechanical testing. A final phase will conduct comprehensive testing and demonstration under the plan created earlier. The sequence matters: define the claim and controlled process before expanding the evidence.

Why AM qualification is expensive

NIST notes that conventional empirical qualification for critical applications can involve thousands of tests, millions of dollars and years of work, while a small process change can trigger requalification. AM is particularly difficult because powder history, machine, laser, build position, thermal history and post-treatment jointly determine properties.

MIAMI is therefore also an experiment in evidence reuse. If teams standardise uncertainty, metadata and change boundaries, one result can inform multiple part and platform decisions. If the output is only average tensile data, cross-platform value will remain limited.

Evidence to look for

Decisive results include variation across machines and builds, the link between coupons and real parts, defect-to-performance relationships and the list of permitted changes. Powder lots, reused material, heat-treatment furnaces, inter-laboratory variation and digital-data versions also need explicit control.

Verified facts, programme goals and editorial assessment

The $12.4 million call, the two named teams and the two-stage plan are verified facts. Faster qualification, fewer duplicate tests and broad cross-platform use are programme goals, not achieved outcomes.

LAYERTIMES assesses that MIAMI's most valuable product may be an auditable interchangeability dossier rather than one showcase part. Its value will depend on whether a later user can determine exactly which evidence is reusable, under which conditions and which change requires new proof.