| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| Presentation Title |
Characteristic Dislocation Slips in Polycrystalline HfNbTiZr Equi-Atomic Alloy |
| Author(s) |
Qiang He, Shuhei Yoshida, Shinji Okajyo, Masaki Tanaka, Nobuhiro Tsuji |
| On-Site Speaker (Planned) |
Nobuhiro Tsuji |
| Abstract Scope |
Characteristics of dislocation slip behavior in an equi-atomic HfNbTiZr BCC alloy was investigated. Slip trace morphologies on the surfaces of the tensile-deformed HfNbTiZr alloy and pure Nb were quantitatively characterized, and the so-called ψ and χ relationships of the observed slip traces were evaluated by a newly developed method for polycrystalline specimens. Wavy slip traces consisted of {1 1 0}, {1 1 2}, and other high-indexed planes were observed in most grains in the pure Nb. In contrast, straight slip traces were dominant in the HfNbTiZr alloy. The straight slip traces in the HfNbTiZr alloy were not parallel to particular slip planes but mostly distributed along the maximum shear stress plane (MSSP). Frequent cross slip in short intervals, attributed to homogeneous slip resistance distribution for screw dislocations in the HfNbTiZr alloy originating from the chemical heterogeneity on an atomic scale, was proposed as a novel mechanism. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, |