Effect of Solid Solution Temperature on the Cold Working Properties of Cu-Al-Mn Shape Memory Alloys
摘 要
通过光学显微镜、扫描电镜、X射线衍射仪、室温压缩试验机等研究了固溶温度对形状记忆合金Cu-17.55Al-9.84Mn(物质的量分数/%, 下同)和Cu-19.1Al-9.9Mn冷加工性能的影响。结果表明: 固溶温度对含17.55%Al合金的冷加工性能影响显著, 但对含19.1%Al合金的影响较小;含17.55%Al的合金因铝含量较低, 经700 ℃以上温度固溶后冷至室温获得的β相或18R马氏体具有低的有序度, 在应力作用下容易发生马氏体转变或马氏体再取向, 其冷加工性能显著好于α+β两相区时的; 含19.1%Al合金在不同温度固溶后的冷加工性能显著低于含17.55%Al合金的, 因其室温组织主要由有序度高的β相组成。
Abstract
The cold working properties of the Cu-17.55Al-9.84Mn (mole fraction) and Cu-19.1Al-9.9Mn shape memory alloys were studied by means of optical microscopy, scanning electron microscopy, X-ray diffractometer and room temperature compression tester. The results show that the solid solution temperature had a significant effect on the cold working properties of the alloy containing 17.55% Al, but a weak effect on that of the alloy containing 19.1% Al. After solid solution above 700 ℃, β phase or 18R martensite with low order degree was obtained at room temperature because the alloy containing 17.55% Al owned low aluminum content, thus the stress easily made β phase or 18R martensite transform into martensite or martensite reorient, so the cold working properties were much higher than the alloy in two phase α and β. The cold working properties of the alloy containing 19.1% Al were far lower than those of the alloy containing 17.55% Al as its structure was mainly composed of β phase with high order degree at room temperature.
中图分类号 TG139.6
所属栏目
基金项目 新世纪优秀人才支持计划项目(NCET-06-0793)
收稿日期 2010/7/18
修改稿日期 2010/12/16
网络出版日期
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备注方文杰(1986-), 男, 浙江温州人, 硕士研究生。
引用该论文: FANG Wen-jie,JIAO Yu-qin,WEN Yu-hua,LI Ning,HE Jia-qiang. Effect of Solid Solution Temperature on the Cold Working Properties of Cu-Al-Mn Shape Memory Alloys[J]. Materials for mechancial engineering, 2011, 35(7): 39~42
方文杰,焦玉琴,文玉华,李宁,何加强. 固溶温度对铜-铝-锰形状记忆合金冷加工性能的影响[J]. 机械工程材料, 2011, 35(7): 39~42
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参考文献
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【9】苏蕾, 李宁, 文玉华, 等.低温回火对 Cu-18Al-10Mn(at%)合金形状记忆性能的影响[J].稀有金属材料与工程, 2008, 37(10): 1710-1713.
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【11】何加强, 焦玉琴, 文玉华, 等.热处理工艺对Cu-16.2Al-9.9Mn合金形状记忆效应的影响[J].金属热处理, 2008, 33(11): 78-81.
【12】李周, 汪明朴, 徐根应, 等.Cu-18.4Al-8.7Mn-3.4Zn-0.1Zr记忆合金冷加工性能[J].矿冶工程, 2002, 22(1): 89-91.
【13】李周, 汪明朴, 程建奕, 等.Cu-Al-Mn-Zn-Zr记忆合金的显微组织与力学行为[J].中国有色金属学报, 2003, 13(2): 399-403.
【14】焦玉琴, 李宁, 文玉华.母相时效对Cu-17Al-10Mn合金相变温度和形状记忆性能的影响[J].中国有色金属学报, 2009, 19(1): 96-100.
【15】杨杰, 吴月华.形状记忆合金及其应用[M].合肥: 中国科学技术大学出版社, 1993.
【16】樊平, 穆云超, 岳学庆.变形对铜锌铝合金在加热过程中有序无序转变的影响[J].机械工程材料, 2009, 33(6): 29-33.
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