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Effect of matrix dislocation strengthening on deformation-induced martensitic transformation behavior of metastable high-entropy alloys.
- Source :
- Materials Research Letters; Jan2024, Vol. 12 Issue 1, p1-9, 9p
- Publication Year :
- 2024
-
Abstract
- In this study, we investigate the influence of dislocation strengthening in the metastable parent phase on the deformation-induced martensitic transformation behavior of a face-centered cubic (fcc) Co<subscript>20</subscript>Cr<subscript>20</subscript>Fe<subscript>34</subscript>Mn<subscript>20</subscript>Ni<subscript>6</subscript> high-entropy alloy. Annealed and hot-swaged specimens were prepared. In-situ neutron diffraction experiments captured an accelerated transformation kinetics in the hot-swaged specimen due to accumulated dislocations. The phase-specific macrostress development showed that the hexagonal close-packed $ \rvarepsilon $ ε -martensite predominantly accommodated the macroscopic plastic deformation of the annealed counterpart. Conversely, the matrix dislocation strengthening promoted cooperative plasticity of the $ \rgamma $ γ -matrix and the $ \rvarepsilon $ ε -martensitic phase, thus enhancing yield stress while preserving ductility. This paper firstly uncovers the role and significance of matrix dislocation strengthening on the mechanical behavior of metastable high-entropy alloys via in-situ neutron diffraction experiments. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 21663831
- Volume :
- 12
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Materials Research Letters
- Publication Type :
- Academic Journal
- Accession number :
- 174276297
- Full Text :
- https://doi.org/10.1080/21663831.2023.2281593