摘要
本文用膨胀法比较了Ｆｅ－３０Ｍｎ－６Ｓｉ合金在拉伸应变下纵向（沿拉伸方向）和横向（垂直拉伸方向）恢复率的不同；研究了预应变对纵向恢复量，恢复率以及Ａ_ｓ，Ａ_ｆ的影响；还用一个大应变量下的样品在Ａ_ｓ和Ａ_ｆ范围内的不同温度区间进行了加热和冷却循环试验，得到了一些很有意义的信息。用正电子湮灭方法研究了Ｆｅ－３０ＭＤ－６Ｓｉ，Ｆｅ－３０Ｍｎ－６Ｓｉ－５Ｃｒ合金时效和非时效样品拉伸预应变量对合金中缺陷量，缺陷密度，γ→ε相变量等的影响。
The dilatometric method has been used to compare the difference of the longitudinal (parallel to tensile direction) and transverse(vertical to tensile direction)recovery rate of Fe-30Mn-6Si-5Cr alloy in this paper.The effect of prestrain on longitudinal recovery quantity, recovery rate,A_s and A_f has been studied.The recovery rate affected by thermal cycling following prestrain has been studied.At same time, some significant information was obtained by repeated heating and cooing a large prestrain specimen in different temperature range between A_s and A_f.Moreover, the influence of tensile prestrain on the amount of defects, the alloy density at defects and the amount of γ→ε transformation has been examined by using positron annihilation technique in aging and nonaging Fe-30Mn-6Si and Fe30Mn-6Si-5Cr alloys.
出处
《功能材料与器件学报》
CAS
CSCD
1996年第2期83-89,共7页
Journal of Functional Materials and Devices
基金
国家自然科学基金
关键词
形状记忆合金
形变
相变
Positive and reverse γ→ε transformation.tensile strain, recovery rate,positron lifetime
