Pseudoelastic behaviour of Fe3Al single crystals with D03 structure

被引：9

作者：

Yasuda, H. Y. ^{[1
]}

Umakoshi, Y. ^{[2
]}

机构：

[1] Osaka Univ, Div Mat & Mfg Sci, Grad Sch Engn, Suita, Osaka 5650871, Japan

[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

INTERMETALLICS | 2010年 / 18卷 / 07期

关键词：

Iron aluminides; based on Fe3Al; Shape memory effects; Order/disorder transformations; Defects: dislocation geometry and arrangement; Electron microscopy; transmission; FE-AL ALLOYS; TEMPERATURE-DEPENDENCE; PSEUDO-ELASTICITY; ORDERING PROCESS; RANGE; SUPERLATTICES;

D O I：

10.1016/j.intermet.2010.01.007

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Pseudoelasticity which shape memory alloys reveal is generally based on a thermoelastic martensitic transformation. However, Fe-rich Fe3Al single crystals with the D0(3) structure demonstrate pseudoelasticity regardless of the martensitic transformation. It is strongly suggested that the pseudoelasticity of Fe3Al crystals originates from the peculiar dislocation motion dragging an antiphase boundary (APB). During loading, a 1/4 < 111 > superpartial dislocation moves individually dragging the APB. On the other hand, the APB pulls back the superpartial during unloading due to its tension resulting in the pseudoelasticity of which recoverable strain is as much as 5%. Hence, this phenomenon is called "APB pseudoelasticity". This article summarizes the recent progress in the understanding of the pseudoelastic behaviour of D0(3)-ordered Fe3Al single crystals and the effects of Al concentration, deformation temperature, loading axis and third element addition are discussed. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1273 / 1278

页数：6

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