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Work Item

ASTM WK93821

New Test Method for Additive Manufacturing (AM)—Metallic Powder Feedstock—Measurement of high density contaminants in titanium AM metal feedstocks using µXCT

1. Scope
The proposed standard describes a method of inspection of AM powder feedstock. The method uses microfocused x-ray tomography to quantitfy the contamination in AM metal feedstocks. The method is very powerfull as it provides information on the density, size, shape and concentration of the contaminants. The method is presented in WK80171 (Measurement and Classification of Feedstock Contamination) but is not described in details.
Keywords
x-ray micro-computed tomography; Titanium powder; cleanliness assessment; contamination measurement
Rationale

The proposed standard is needed to improve the performance and safety of components. In certain industries, contamination of AM metal feedstock is a significant concern, yet there is currently no standardized method to measure it. The recent recall of airplane engines due to contaminants originating from the powder has highlighted the critical need for controlling and measuring powder cleanliness. Although Work Item WK80171 presents various techniques to assess contamination, it lacks specific standard methods or guidelines, which significantly limits its impact. The proposed standard aims to contribute to addressing the PM7 gap identified in the America Makes Standardization Roadmap for AM. This roadmap emphasizes the need for specifications to guide procurement decisions and establish requirements and acceptance criteria for metal powder to ensure quality assurance. The expected users are metal powder producers, powder users, OEMs and µXCT inspection service providers. The standard will be used to inspect and qualify powders and certify that the amount and characteristics are within accepted limits. Acceptance criteria are material, process and application specific and will not be prescribed in the standard.

Details

Developed by Subcommittee: F42.01

Committee: F42

Staff Manager: Pat Picariello

Work Item Status

Date Initiated: 02-10-2025

Technical Contact: Roger PELLETIER

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