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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Nix Award and Lecture Symposium: Mechanistic Understanding of Mechanical Behavior Across Length Scales
Presentation Title The Role of Solutes and Short Range Order (SRO) in the Deformation of α-Ti Alloys
Author(s) Ruopeng Zhang, Shiteng Zhao, Yan Chong, Max Nicholas Poschmann, Eric Rothchild, Colin Ophus, John W. Morris, Daryl C Chrzan, Mark D. Asta, Andrew M. Minor
On-Site Speaker (Planned) Andrew M. Minor
Abstract Scope This talk will center on the impact of SRO on the mechanical behavior of Ti alloys. Specifically, we have looked at the effect of O and Al solutes with a combination of advanced TEM, nanomechanical testing and bulk testing of model alloys. In Ti-O alloys we have performed tensile deformation at low, room and high temperatures at various strain rates and performed microstructural analysis to systematically map out the effect of solute content, temperature and strain rate on the planar to wavy slip transition. This transition will be discussed in the context of theoretical models of O solute effects on dislocation cross-slip. In Ti-Al alloys we have used energy filtered imaging and 4D-STEM to map the local SRO and strain with nanometer precision, even during in situ nanomechanical testing. Lastly, we have investigated the phenomenon of electroplasticity with Ti-Al alloys and found interesting similarities between the effect of SRO and electrical pulsing on the defect structure.
Proceedings Inclusion? Undecided


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