Coherency of ordered γ′ precipitates and thermoelastic martensitic transformation in FeNiCoAlTaB alloys

被引：46

作者：

Geng, Yonghong ^{[1
,2
]}

Lee, Doyup ^{[2
]}

Xu, Xiao ^{[2
]}

Nagasako, Makoto ^{[3
]}

Jin, Mingjiang ^{[1
]}

Jin, Xuejun ^{[1
]}

Omori, Toshihiro ^{[2
]}

Kainuma, Ryosuke ^{[2
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[2] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Sendai, Miyagi 9808579, Japan

[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 628卷

基金：

中国国家自然科学基金;

关键词：

Shape memory; Phase transition; Precipitation; Coherency; Thermoelastic martensitic transformation; SHAPE-MEMORY ALLOY; NI-C ALLOYS; FE-NI; SINGLE-CRYSTALS; SUPERELASTICITY; SUBSTRUCTURE; BEHAVIOR;

D O I：

10.1016/j.jallcom.2014.12.172

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：

The martensitic transformation characteristics and coherency of ordered gamma' precipitates are investigated by electrical resistivity tests and HAADF-STEM observation in the aged FeNiCoAlTaB alloys. The results reveal that the precipitate grows up in the Ostwald ripening mode at the initial aging stage. As aging time increasing, the coarsening behavior of precipitates deviates from the Ostwald ripening and the martensitic transformation changes from the thermoelastic type to the non-thermoelastic one. The thermoelastic to non-thermoelastic transition with increasing precipitates size results from coherency loss between precipitates and matrix during martensitic transformation. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：287 / 292

页数：6

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