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Impact of stresses and alloying elements on ferrous martensite nanodomains

Abstract : Using first-principles calculations, we investigated the impact of applied stresses and alloying elements on ferrous martensite nanodomains. In non-alloyed martensite, the procedure revealed that twinned states can be stabilized depending on applied stresses, leading to several possible crystallographic structures: body-centered tetragonal (BCT) oblate, body-centered orthorhombic (BCO), or BCT prolate. In alloyed martensite, we confirmed the experimental data from literature showing that Al or high Ni addition disfavors crystal twin formation (leading to BCT variants with high tetragonality ratios), whereas Cr, Mn, or Re addition favors crystal twin formation (leading to BCO variants with low tetragonality ratios).
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https://hal.archives-ouvertes.fr/hal-03600566
Contributor : Philippe Maugis Connect in order to contact the contributor
Submitted on : Wednesday, May 11, 2022 - 10:22:43 AM
Last modification on : Thursday, May 12, 2022 - 3:45:55 AM

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Paul Eyméoud, Dmytro Kandaskalov, Philippe Maugis. Impact of stresses and alloying elements on ferrous martensite nanodomains. Materials Letters, Elsevier, 2022, 308, pp.131248. ⟨10.1016/j.matlet.2021.131248⟩. ⟨hal-03600566v2⟩

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