Effect of Thermomechanical Processing on Texture and Superelasticity in Fe–Ni-Co-Al–Ti-B Alloy

被引：17

作者：

Lee D. ^{[1
]}

Omori T. ^{[1
]}

Han K. ^{[1
]}

Hayakawa Y. ^{[1
,2
]}

Kainuma R. ^{[1
]}

机构：

[1] Department of Materials Science, Graduate School of Engineering, Tohoku University, Aoba-yama 6-6-02, Sendai

[2] Steel Research Laboratory, JFE Steel Corporation, Kawasakidori 1-chome, Mizushima, Kurashiki

来源：

Shape Memory and Superelasticity | 2018年 / 4卷 / 1期

基金：

日本学术振兴会;

关键词：

Deformation texture; Ferrous shape memory alloy; Fe–Ni-Co-Al–Ti-B; Recrystallization texture; Secondary recrystallization; Superelasticity;

D O I：

10.1007/s40830-018-0160-5

中图分类号：

学科分类号：

摘要：

The texture and superelasticity were investigated in austenitic Fe–Ni-Co-Al–Ti-B alloy with various reduction ratios of cold rolling and heating ratios in annealing. The rolled sheets show the {110} 〈112〉 deformation texture at a reduction ratio higher than 80%, while the texture hardly changes in the primary recrystallization at 1000 °C. The β (B2) precipitates inhibit the grain growth at this temperature, but they dissolve during heating, and secondary recrystallization occurs due to decreased pinning force at temperatures higher than 1100 °C, resulting in texture change to {210} 〈001〉. The recrystallization texture is more strongly developed when the reduction ratio and heating rate are high and slow, respectively. The 90% cold-rolled and slowly heated sheet shows the recrystallization texture and high fraction of low-angle boundaries. As a result, ductility and superelasticity can be drastically improved in the 90% cold-rolled sheet, although superelasticity was previously obtained only in thin sheets with 98.5% reduction. © 2018, ASM International.

引用

页码：102 / 111

页数：9

共 21 条

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