Influence of precipitated direction of the second phase on shape memory effect of Fe-based alloy

被引：0

作者：

Wen Yuhua ^{[1
]}

Zhang Wei ^{[1
]}

Li Ning ^{[1
]}

Xie Wenling ^{[1
]}

Wang Shanhua ^{[1
]}

机构：

[1] Sichuan Univ, Coll Mfg Sci & Engn, Chengdu 610065, Peoples R China

来源：

ACTA METALLURGICA SINICA | 2006年 / 42卷 / 11期

关键词：

Fe-based shape memory alloy; ageing; carbides; directional precipitation; CR; IMPROVEMENT;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

To develop Fe-based shape memory alloys with high recovery strain free of training, the effects of direct ageing and strain ageing on the precipitation of the second phases, the martensite transformation and the shape memory effect of an Fe-13.53Mn-4.86Si-8.16Cr-3.82Ni-0.16C alloy were investigated. The SEM and XRD showed that after ageing lots of Cr23C6 precipitated, while the precipitates after strain ageing are directional precipitation. At the same aging time, the amount of second phase through strain ageing is much more than that through the direct ageing, and the size of the former is smaller than that of the latter. The shape memory effect can be remarkably improved through both the strain ageing and ageing at the optimal aging time, but the shape memory effect of the former (82%) is much better than that of the latter (43%) at the same aging time. The Fe-based shape memory alloys with high revovery strain free of training can be fabricated through controlling the precipitated direction of the second phases.

引用

页码：1217 / 1220

页数：4

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