About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Advances in Multi-Principal Element Alloys III: Mechanical Behavior
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Presentation Title |
Investigating Alloying Effect on Dislocation Mechanisms in Multi-principal Element Alloys |
Author(s) |
Yujie Chen, Yan Fang, Qian Yu |
On-Site Speaker (Planned) |
Yujie Chen |
Abstract Scope |
Mechanical properties of materials are highly associated with dislocation structure and how they move in lattice. Alloying elements, can significantly influence mechanical properties by tuning dislocation structure or behaviors. Importantly, the corresponding mechanisms can be more complicated than we traditionally thought specifically as high sensitivity of elements distribution in multi-principal element alloys is involved. Here, by comparing the change of chemical distribution, dislocation behaviors and mechanical properties after doping equivalent amount of tungsten (W) atoms in CrCoNi alloy and pure Ni, respectively, it is found that the alloying element W in CrCoNi alloy resulted in much stronger strengthening effect due to the significant increase of heterogeneity in chemical distribution, causing dislocation motion via strong nanoscale segment detrapping and severe dislocation pile up which is not the case in Ni-3W. We revealed that chemically tuned inhomogeneities is sensitive and strongly influenced by elements addition, giving insight for complex alloy design. |
Proceedings Inclusion? |
Planned: |