Work Item
ASTM WK73289

New Guide for In-Situ Monitoring of Metal Additively Manufactured Aerospace Parts

1. Scope

This Guide discusses the use of emerging in-site monitoring procedures used during the fabrication of metal parts by additive manufacturing (AM). The in-situ monitoring procedures discussed in the standard product data related to and affected by input materials, processes, microstructure, and part geometry and complexity. The metal materials under consideration include but are not limited to aluminum alloys, titanium alloys, nickel-based alloys, cobalt-chromium alloys, and stainless steels. The manufacturing processes considered use powder and wire feedstock, and laser or electron energy sources. Specific powder bed fusion (PBF) and directed energy deposition (DED) processes are discussed. The parts covered by this Guide are used in aerospace applications; therefore, the inspection requirements for processes and products are more stringent than for materials and components used in non-aerospace applications. This Guide discusses in-situ monitoring procedures used during the additive manufacturing process. These procedures are used by cognizant engineering organizations to monitor melt pool characteristics, or similarly, to detect and characterize flaws and defects produced during build prior to part acceptance or initiation of post-processing steps. The in-situ monitoring procedures measure the melt pool temperature and provide a layer-by-layer quality record, including information related to any anomalies within a part as it is made. There are no known equivalent ISO standards. UnitsThe values stated in SI units are to be regarded as the standard. The English units given in parentheses are provided for information only.

Keywords

Melt Pool Monitoring (MPM), In-Situ Monitory, Additive Manufacturing (AM), witness coupons, sensors and characterization

Rationale

This Guide discusses the use of emerging in-site monitoring procedures used during the fabrication of metal parts by additive manufacturing (AM). The in-situ monitoring procedures discussed in the standard product data related to and affected by input materials, processes, microstructure, and part geometry and complexity. The metal materials under consideration include but are not limited to aluminum alloys, titanium alloys, nickel-based alloys, cobalt-chromium alloys, and stainless steels. The manufacturing processes considered use powder and wire feedstock, and laser or electron energy sources. Specific powder bed fusion (PBF) and directed energy deposition (DED) processes are discussed. The parts covered by this Guide are used in aerospace applications; therefore, the inspection requirements for processes and products are more stringent than for materials and components used in non-aerospace applications. This Guide discusses in-situ monitoring procedures used during the additive manufacturing process. These procedures are used by cognizant engineering organizations to monitor melt pool characteristics, or similarly, to detect and characterize flaws and defects produced during build prior to part acceptance or initiation of post-processing steps. The in-situ monitoring procedures measure the melt pool temperature and provide a layer-by-layer quality record, including information related to any anomalies within a part as it is made. There are no known equivalent ISO standards. UnitsThe values stated in SI units are to be regarded as the standard. The English units given in parentheses are provided for information only.

The title and scope are in draft form and are under development within this ASTM Committee.

Details

Developed by Subcommittee: E07.10

Committee: E07

Staff Manager: Kristy Straiton

Work Item Status

Date Initiated: 06-15-2020

Technical Contact: Surendra Singh

Item: 001

Ballot: E07.10 (21-01)

Status: Will Reballot Item

Item: 001

Ballot: E07 (22-03)

Status: Ballot Item Approved