|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation Mechanisms
||L-5: Microstructural Development During Particle/Substrate Impacts in Cold Spray of Gas Atomized Aluminum Alloy Powders
||Benjamin Bedard, Tyler Flanagan, Sumit Suresh, Avinash M. Dongare, Seok-Woo Lee, Harold D. Brody, Xuemei Wang, Victor R. Champagne,
|On-Site Speaker (Planned)
A summary will be presented of our characterization studies on single-pass cold spray trials of gas-atomized Al 6061 powder onto substrates of the same alloy in a standard microstructural condition. A combination of SEM, FIB sectioning, and TEM studies has been used to investigate the microstructural features in the feedstock powder particles and in individual powder splats. These data are used to reveal the nature of the microstructural development in the earliest stages of cold spray deposition. It is shown that the silicide and iron-bearing phases adopt a characteristic distribution in the powder, and that these act as internal markers to reveal the localization of shear within the splats. The absence of these phases in the redeposited jetted material, and the adoption of characteristic columnar grain structures in such regions, is used to show that localized melting is occurring at the interface under the deposition conditions used in this study.
||Planned: Supplemental Proceedings volume