About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
Presentation Title |
Ultrahigh Strength Triggered by BCC and B2 Eutectic-Phase Interfaces in a Novel Fe30Cr15V15Ni20Al20 High Entropy Alloy |
Author(s) |
M.Z. Wang, Yongfeng Shen, N. Jia |
On-Site Speaker (Planned) |
Yongfeng Shen |
Abstract Scope |
The strength-ductility trade-off and composition uniformity have been the obstacles for achieving the advanced structural alloys. To overcome the limitations, a novel method is developed to prepare coherently eutectic high-entropy alloy (CEHEA) Fe30Cr15V15Ni20Al20. The alloy has a high stability by introducing a BCC phase with low lattice misfit (0.13%) and constructing BCC+B2 eutectic-phase interface. The low lattice mismatch retains the phase interface stability and inhibits the crack initiation, enabling more homogenous deformation of the alloy. Thus, the as-cast Fe30Cr15V15Ni20Al20 alloy shows excellent tensile yield strength of 929 MPa and ultimate tensile strength of 1142 MPa, while retaining a good ductility of 6.8 %. Under compression, it shows an unprecedented combination of yield strength of 2423 MPa and ultimate strength of 2871 MPa, accompanied with an excellent plasticity of 22.3%. |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, Other, Other |