|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Late News Poster Session
||Evaluation of Microstructure and Mechanical Properties of Al-Mg-Si Alloy Deposited via Submerged Additive Friction Stir Deposition
||Ryan Kinser, Malcom Brady Williams, James Brian Jordon, Paul Allison
|On-Site Speaker (Planned)
Many precipitation-strengthened aluminum alloys exhibit a reduction in mechanical properties when subjected to sustained elevated temperatures and slow cooling rates during additive manufacturing. This research investigates a practical and deployable method for improving the as-deposited mechanical properties of aluminum alloys processed via additive friction stir deposition (AFSD) through a submerged cooling approach. Two multilayer depositions were manufactured via AFSD using wrought 6061-T6 (Al-Mg-Si) feedstock and substrate, one conducted in ambient air and the other submerged in water. Tensile characteristics of the as-deposited material in both depositions indicate a reduction in strength relative to the wrought feedstock but suggest a less severe thermal history in the submerged deposition. Process temperatures recorded during the depositions corroborate this trend, revealing a lower peak temperature and increased cooling rate associated with the submerged deposition. The present study illustrates the viability of submerged cooling for improving the as-deposited properties of AFSD aluminum components.
||Additive Manufacturing, Aluminum, Process Technology