Cyclic superelasticity behavior of Co35Ni35Al28Fe2 single crystals

被引：0
作者：
Eftifeeva, Anna [1 ]
Fatkullin, Ilya [1 ]
Tagiltsev, Anton [1 ]
Kurlevskaya, Irina [1 ]
Volochaev, Mikhail [2 ]
Panchenko, Elena [1 ]
Chumlyakov, Yuriy [1 ]
机构：
[1] Natl Res Tomsk State Univ, Tomsk 634050, Russia
[2] Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
来源：
MATERIALS LETTERS | 2025年 / 396卷
基金：
俄罗斯科学基金会;
关键词：
Martensitic transformation; Superelasticity; Single crystals; Cyclic stability; Particles; Twinning; STABILITY; STRENGTH;
D O I：
10.1016/j.matlet.2025.138728
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of cyclic loading/unloading on high-temperature superelasticity and the (B2 + gamma/gamma')-microstructure was studied in quenched Co35Ni35Al28Fe2 single crystals oriented along the [001]B2-direction. They displayed excellent superelastic response in compression over 100 loading/unloading cycles at 423 K. This superelasticity response is attributed to the high-strength crystallographic [001]B2 orientation of the B2-matrix and strengthening of the gamma-phase due to nanosized gamma'-particles. The stress-induced B2-L10 martensitic transformation during loading/unloading cycles was accompanied by plastic deformation via twinning of the secondary gamma/gamma'-phase and dislocation accumulations in B2-matrix around the gamma/gamma'-phase. This results in a reduction in the critical stress for the martensite formation, stress hysteresis and reversible strain during cycling.
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页数：5
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