LB-PBF Process Qualification (NASA/Auburn University)

Project: Development of Standard Procedures and Metrics for Qualification of Laser Powder Bed Fusion (L-PBF) Machines and Processes – Phase II

Partner Lead

NASA

Challenge

Lack of minimum requirements for the qualification of L-PBF machines and processes.

Impact (Standardization Gaps)

There is a void in currently available industry standards regarding the specifics of AM machine and process qualification. This is discussed in the AMSC Standardization Roadmap for Additive Manufacturing, Version 2.0, Section 2.3.3.1 on “Processes on Procedures.” This project is also responsive to the following related AMSC Gaps:

  • D8 Design Tools: A Machine Input and Capability Report (Medium Priority)

  • D17 Design Documentation: Technical Data Package (TDP) Content (High)

  • D28 Design Documentation: Specification of Surface Finish (Medium)

  • PC2 Process Control: Machine Calibration and Preventative Maintenance (High)

  • PC4 Process Control: Machine Qualification (Medium)

  • PC5 Process Control: Parameter Control (Medium)

  • FMP1 Finished Material Properties: Material Properties (High)

  • FMP4 Finished Material Properties: Design Allowables (High)

  • FMP5 Finished Material Properties: Microstructure (Medium)

Solution

In Phase I of this project, a consensus within the ASTM CoE community regarding minimum requirements for the qualification of L-PBF machines and processes has been developed.

In phase II, the following tasks will be conducted:

  • Establish a standard set of procedures, test methods, and evaluations used to establish L-PBF qualification based on fundamental objectives.

  • Establish quantitative and/or qualitative metrics applicable to each evaluation to define successful machine and process qualification.

  • Conduct development and round-robin-style trials of the qualification evaluations and associated metrics.

Deliverables

NASA will work to develop standard procedures, metrics, and comprehensive requirements to help qualify machines and processes in laser powder bed fusion. This process qualification and assessment research aims to establish much-needed consensus in this area across the additive manufacturing community.

phase 2Jameson Elder