The Cyclic Stability of the Superelasticity in Quenched and Aged Ni44Fe19Ga27Co10 Single Crystals

被引：2
|
作者：
Timofeeva, Ekaterina [1 ]
Panchenko, Elena [1 ]
Zherdeva, Maria [1 ]
Tokhmetova, Aida [1 ]
Chumlyakov, Yuriy I. [1 ]
机构：
[1] Natl Res Tomsk State Univ, Siberian Phys Tech Inst, Lab Phys High Strength Crystals, Lenina Str 36, Tomsk 634050, Russia
来源：
METALS | 2023年 / 13卷 / 09期
关键词：
cyclic stability; superelasticity; single crystals; martensitic transformations; critical stress; stress hysteresis; aging; MEMORY; TRANSFORMATION; DEFORMATION; FATIGUE;
D O I：
10.3390/met13091538
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of aging (at 773 K for 1 h) on the cyclic stability of superelasticity was studied in preliminarily quenched (after annealing at 1448 K for 1 h) Ni44Fe19Ga27Co10 [001]-oriented single crystals. It was shown that NiFeGaCo single crystals (both quenched and aged) exhibited highly stable superelasticity during more than 10(5) loading/unloading cycles in compression without destruction. The degradation of the superelasticity curves was divided into stages, and each stage of degradation was carefully considered. The precipitation of omega-phase particles led to a change in the degradation mechanism of superelasticity in the aged crystals. The main degradation mechanism for quenched crystals is a formation of uniform distribution of dislocations; for aged crystals, the microstructural degradation mechanisms consist of a non-uniform distribution of dislocations around the particles and the appearance of residual martensite.
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页数：12
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