The Resistance against the Aging for the Matrix Phase in Cu-Al-Mn-Ti Shape Memory Alloys

Zhang Jin~1; Lin Xiaoping~1; Wang Hongwei~2; Wang Guoqiang~3; Liu Wenkai~4

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The Resistance against the Aging for the Matrix Phase in Cu-Al-Mn-Ti Shape Memory Alloys
Issue 2, Pages: 158-160(2007)
Published： 2007 ，
DOI：

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[1]张进,林晓娉,王宏伟,王国强,刘文开.Cu-Al-Mn-Ti形状记忆合金抗母相时效的研究[J].特种铸造及有色合金,2007(02):158-160+82.

Zhang Jin~1, Lin Xiaoping~1, Wang Hongwei~2, et al. The Resistance against the Aging for the Matrix Phase in Cu-Al-Mn-Ti Shape Memory Alloys. [J]. Special Casting & Nonferrous Alloys (2):158-160(2007)
[1]张进,林晓娉,王宏伟,王国强,刘文开.Cu-Al-Mn-Ti形状记忆合金抗母相时效的研究[J].特种铸造及有色合金,2007(02):158-160+82. DOI：

Zhang Jin~1, Lin Xiaoping~1, Wang Hongwei~2, et al. The Resistance against the Aging for the Matrix Phase in Cu-Al-Mn-Ti Shape Memory Alloys. [J]. Special Casting & Nonferrous Alloys (2):158-160(2007) DOI：

摘要

利用弯曲试验、X射线衍射、金相和扫描电镜及透射电镜观察等方法研究了CuAl24Mn3Ti2合金在不同母相时效处理条件下的抗母相时效能力。结果表明

对于同一种变形量

Cu-Al-Mn-Ti合金在母相时效时

形状记忆效应随不同时效保温温度呈现先下降后上升的规律性变化

其中400℃记忆效应最好

500℃最差;而形状记忆效应则随不同时效保温时间呈现不同程度的先上升后下降的规律性变化

400℃合金下降缓慢

500℃下降加快;Mn和Ti的加入细化了组织

并且形成了富Mn和富Ti相

强化了合金组织

提高了合金的记忆效应。

Abstract

The resistance against the aging for matrix phase in Cu-24Al-3Mn-2Ti alloy has been tested by bending test

X-ray diffraction

optical metalloscope and SEM and TEM in the conditions of different aging for matrix phase. The results indicate that with a given strain

shape memory effects （SME） are firstly decreased then increased with increasing in holding temperature

in which the desirable SME can be observed at 400 ℃ and the most un-desirable SME can be found at 500 ℃. The SME can exhibit first increase then decrease with increasing in holding time

which shows slow decrease at 400 ℃ and somewhat rapid decrease at 500 ℃. The microstructure of the alloy can be refined with the Mn and Ti addition due to the creation of Mn-enrichment and Ti-enrichment phase

which can strengthen the microstructure and improve the SME of the alloy.