The effect of ageing of the [011]-oriented Co35Ni35Al30 single crystals in free state and under loading on their functional properties

被引：9
作者：
Panchenko, E. Yu [1 ]
Chumlyakov, Yu I. [1 ]
Maier, H. [2 ]
Kanafieva, A. S. [1 ]
Kirillov, V. A. [1 ]
机构：
[1] Natl Res Tomsk State Univ, VD Kuznetsov Siberian Phys Tech Inst, Tomsk, Russia
[2] Univ Paderborn, D-33098 Paderborn, Germany
来源：
RUSSIAN PHYSICS JOURNAL | 2013年 / 55卷 / 10期
关键词：
thermoelastic martensitic transformations; single crystals; superelasticity; ageing under loading; disperse particles; cyclic stability; HIGH-TEMPERATURE SUPERELASTICITY; NI-AL SINGLE; MEMORY; ORIENTATION;
D O I：
10.1007/s11182-013-9932-8
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Using Co35Ni35Al30 (at.%)single crystals oriented along the [011]-axis, the influence of ageing at 673 K for 0.5 h in free state and under loading in compression on the temperature dependence of critical stresses of formation of L1(0)-martensite, yield stress of the D'2-phase, temperature interval of superelasticity, and stress hysteresis is investigated. Ageing of these single crystals in free state and under loading is found to result in strengthening of the high-temperature D'2-phase, widening of the temperature interval within which superelasticity is observed, and a nearly threefold decrease in the width of the stress hysteresis compared to the quenched state. It is shown for the first time that stress-assisted aged [011]-oriented Co35Ni35Al30 single crystals possess lower critical stress levels of stress-induced martensitic transformation at T < 473 K, a higher yield stress of the austenite phase and a higher starting temperature of the B2-L1(0) martensitic transformations upon cooling by a dagger M-s similar to 40 K than those aged in free state.
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页码：1123 / 1131
页数：9
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