Slone C, LaRosa CR, Zenk CH, George EP, Ghazisaeidi M, Mills MJ (2020)
Publication Language: English
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2020
Publisher: Acta Materialia Inc
Book Volume: 178
Pages Range: 295-300
DOI: 10.1016/j.scriptamat.2019.11.053
High strain-hardening rates in equiatomic CrCoNi and other multi-principal element alloys have been attributed to deformation twinning. This work shows that small additions of Al and Ti to a CrCoNi alloy deactivate deformation twinning with only minor changes to uniform elongation and ultimate tensile strength. The initial microstructure is free of chemically ordered (Al,Ti)-rich precipitates after solutionizing and quenching. Tensile properties for the alloy are reported and compared to equiatomic CrCoNi, and the post-deformation microstructure is assessed. Density functional theory calculations indicate that energetically unfavorable Al-Al bonds may discourage shearing via partial dislocations, which are necessary for twinning to occur.
APA:
Slone, C., LaRosa, C.R., Zenk, C.H., George, E.P., Ghazisaeidi, M., & Mills, M.J. (2020). Deactivating deformation twinning in medium-entropy CrCoNi with small additions of aluminum and titanium. Scripta Materialia, 178, 295-300. https://dx.doi.org/10.1016/j.scriptamat.2019.11.053
MLA:
Slone, Connor, et al. "Deactivating deformation twinning in medium-entropy CrCoNi with small additions of aluminum and titanium." Scripta Materialia 178 (2020): 295-300.
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