Shape Memory effect and Superelasticity in the [001] Single crystals of a FeNiCoAlTa Alloy with γ-α′-Thermoelastic Martensitic Transformations

被引：12

作者：

Chumlyakov, Yu. I. ^{[1
]}

Kireeva, I. V. ^{[1
]}

Kretinina, I. V. ^{[1
]}

Keinikh, K. S. ^{[1
]}

Kuts, O. A. ^{[1
]}

Kirillov, V. A. ^{[1
]}

Karaman, I. ^{[2
]}

Maier, H. ^{[3
]}

机构：

[1] Natl Res Tomsk State Univ, VD Kuznetsov Siberian Phys Tech Inst, Tomsk, Russia

[2] Texas A&M Univ, College Stn, TX USA

[3] Leibniz Univ Hannover, D-30167 Hannover, Germany

来源：

RUSSIAN PHYSICS JOURNAL | 2013年 / 56卷 / 08期

关键词：

single crystals of iron-base alloys; thermoelastic martensitic transformations; shape memory effect; superelasticity; nanosized gamma '-phase particles; DEFORMATION; BEHAVIOR; CO;

D O I：

10.1007/s11182-013-0119-0

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using single crystals of a Fe - 28% Ni - 17% Co - 11.5% Al - 25% Ta (at.%) alloy, oriented for tensile loading along the [001] direction, the shape-memory (SME) and superelasticity (SE) effects caused by reversible thermoelastic martensitic transformations (MTs) from a high-temperature fcc-phase into a bctmartensite are investigated. It is demonstrated that the conditions necessary for the thermoelastic MTs to occur are achieved by aging at 973 K within the time interval (t) from 0.5 to 7.0 hours, which is accompanied by precipitation of the gamma'-phase particles, (FeNiCo)(3)(AlTa), whose d < 8-12 nm. When the size of the gamma'-precipitates becomes as large as d a parts per thousand yenaEuro parts per thousand 8-12 nm, the MT becomes partially reversible. The physical causes underlying the kinetics of thermoelstic reversible fcc-bct MTs are discussed.

引用

页码：920 / 929

页数：10

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