Orientation dependence of the mechanical behaviour of (CoCrFeNi)94Ti2Al4 high-entropy alloy single crystals with γ′-phase particles I. V. Kireeva, A. A. Saraeva, A. V. Vyrodova, Y. I. Chumlyakov
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ArticleContent type: Текст Media type: электронный Subject(s): высокоэнтропийные сплавы | монокристаллы | осадочное твердение | механическое поведениеGenre/Form: статьи в журналах Online resources: Click here to access online
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Materials letters Vol. 305. P. 130746 (1-4)Abstract: The kinetics of precipitation hardening at 1073 K of the (CoCrFeNi)94Ti2Al4 high-entropy alloy (HEA) was investigated during tension along [001] and [144] orientations. It was shown that at a high level of deforming stresses, the critical resolved shear stresses (CRSS) τcr began to depend on the crystal orientation: τcr[144]<τcr[001]. At 296 K, twinning in [144]-oriented crystals was developed after strain of 5%, and the fracture contained elements of brittle and ductile fracture. In [001]-oriented crystals, deformation occurred by slip, and fracture was ductile.
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The kinetics of precipitation hardening at 1073 K of the (CoCrFeNi)94Ti2Al4 high-entropy alloy (HEA) was investigated during tension along [001] and [144] orientations. It was shown that at a high level of deforming stresses, the critical resolved shear stresses (CRSS) τcr began to depend on the crystal orientation: τcr[144]<τcr[001]. At 296 K, twinning in [144]-oriented crystals was developed after strain of 5%, and the fracture contained elements of brittle and ductile fracture. In [001]-oriented crystals, deformation occurred by slip, and fracture was ductile.
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