About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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High Entropy Alloys VIII
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Presentation Title |
J-116: On the Phase Transformation and Dynamic Stress-strain Partitioning of Ferrous Medium-entropy Alloy Using Integrated Analysis |
Author(s) |
Jae Wung Bae, Jaimyun Jung, Jung Gi Kim, Jeong Min Park, Stefanus Harjo, Takuro Kawasaki, Hyoung Seop Kim |
On-Site Speaker (Planned) |
Jae Wung Bae |
Abstract Scope |
In the present study, an integrated experimental-numerical analysis on ferrous medium-entropy alloy (FMEA) was conducted to understand the micromechanical response of the constituent phases in the FMEA at −137 °C. The initial face-centered cubic (FCC) single phase microstructure of the FMEA was transformed to body-centered cubic (BCC) martensite during tensile deformation at −137 °C, resulting in improved low-temperature mechanical properties. The microstructure evolution due to deformation-induced phase transformation mechanism and strain partitioning behavior was analyzed using ex-situ electron backscatter diffraction. The mechanical responses related to the stress partitioning between constituent phases and deformation-induced transformation rate were measured using in-situ neutron diffraction in combination with the nanoindentation analysis. Three-dimensional microstructure volume element based crystal plasticity models were built based on the experimental observations. The concurrent analysis by means of the integrated methodology revealed the origin of superior strain hardening capability and the resulting outstanding low-temperature mechanical properties. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |