Impact of Powder Variability on the Microstructure and Mechanical Behavior of Selective Laser Melted (SLM) Alloy 718Nickel Alloy 718 has found wide use in high-temperature aerospace applications (up to 700°C), due to a combination of good mechanical properties, environmental resistance, and workability at moderate cost. These properties have led Alloy 718 to early adoption by selective laser melting (SLM) additive manufacturing. This presentation will share results from a comprehensive industry survey of 718 powder feedstock for SLM. The survey focuses on the impact of variability in powder characteristics on build quality, microstructure, tensile and high cycle fatigue in the as-fabricated and machined surface conditions. The investigation includes sixteen powder lots from eight suppliers that are produced by gas atomization or rotary atomization in argon or nitrogen. This research was previously presented and published at the 9th International Symposium on Superalloy 718 & Derivatives and was funded by NASA Space Launch System Liquid Engine Office with the Human Exploration Operations Mission Directorate.
Document ID
20190033928
Acquisition Source
Glenn Research Center
Document Type
Presentation
Authors
Sudbrack, Chantal (Separated)
Lerch, Brad (NASA Glenn Research Center Cleveland, OH, United States)
Smith, Timothy M. (NASA Glenn Research Center Cleveland, OH, United States)
Locci, Ivan E. (Toledo Univ. Toledo, OH, United States)
Ellis, David L. (NASA Glenn Research Center Cleveland, OH, United States)
Thompson, Aaron C. (Vantage Partners, LLC Brook Park, OH, United States)
Date Acquired
December 13, 2019
Publication Date
June 6, 2018
Subject Category
Metals And Metallic Materials
Report/Patent Number
GRC-E-DAA-TN66516Report Number: GRC-E-DAA-TN66516
Meeting Information
Meeting: International Symposium on Superalloy 718 and Derivatives