About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Deformation Behavior and Phase Transformation of Nanotwinned Al/Ti Multilayers |
Author(s) |
Yifan Zhang, Qiang Li, Mingyu Gong, Sichuang Xue, Jie Ding, Jaehun Cho, Tongjun Niu, Ruizhe Su, Nicholas A Richter, Haiyan Wang, Jian Wang, Xinghang Zhang |
On-Site Speaker (Planned) |
Yifan Zhang |
Abstract Scope |
Nanotwinned Al/Ti multilayers have exhibited size-dependent microstructure evolution and high strength. However, their deformation mechanisms are less well understood. In this work, we investigated the deformation mechanisms of nanotwinned Al/Ti multilayers with FCC/HCP layer interfaces by using in situ micropillar compression tests. Nanotwinned Al/Ti multilayers exhibit compressive strength up to 2.4 GPa and work hardening capability. Post-compression TEM analyses reveal high-density stacking faults and HCP-to-FCC phase transformations in Ti. Molecular dynamics simulations elucidate the mechanisms of deformation-induced phase transformation in Ti and the influence of the collective movement of partial dislocations on the deformability of Al/Ti multilayers. |
Proceedings Inclusion? |
Planned: |
Keywords |
Phase Transformations, Mechanical Properties, Modeling and Simulation |