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Cu-25Al-3Mn形状记忆合金淬火态马氏体亚结构特征及其在加热过程中的变化

Twin substructure characteristics of martensite as-quenched in Cu-25Al-3Mn alloy and its change during aging

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【Author】 LI Zhou 1, 2 , WANG ming-pu 1, YANG Guo-tao 1, CAO Ling-fei 1, ZHANG Bing-li 3 (1. School of Materials Science and Engineering, Central South University, Chang sha 410083, China; 2. School of Materials Science and Engineering, Hefei University of Technology , Hefei 230009, China; 3. School of Mechanical and Automotive Engineering, Hefei University of Tech nology, Hefei 230009, China)

【机构】中南大学材料科学与工程学院；合肥工业大学机械与汽车工程学院长沙410083合肥工业大学材料科学与工程学院；合肥230009；长沙410083；合肥230009；

【摘要】利用透射电镜、选区电子衍射等手段研究了Cu 2 5Al 3Mn形状记忆合金淬火态马氏体亚结构特征及其在加热过程中的变化。实验合金淬火态马氏体内部亚结构为 (12 1) 2H孪晶 ,该合金马氏体中产生T谱的孪晶是一些具有不同厚度的、平行入射电子束的片状非相干散射体 ,孪晶亚结构中最薄孪晶片厚度小于 2 .0 2nm ;在加热过程中 ,部分 2H马氏体向 18R马氏体转变 ,出现了层错亚结构特征更多还原

【Abstract】 The twin substructure characteristics of the martensite a s -quenched in Cu-25Al-3Mn alloy and its changing during aging were studied by means of TEM and SAEDP. The substructure of martensite in the tested alloy is co nfirmed to be (121) twin by calculation. The electron diffraction pattern of these twins is resulted from the different thickness, incoherent scattering body, which is parallel to the transmitted beam. The thickness of the minimum tw in is thinner than 2.02 nm. During heating, a part of the 2H martensite transf orms to M18R martensite.更多还原

【关键词】 Cu-Al-Mn合金；马氏体；孪晶；
【Key words】 Cu-Al-Mn alloy； martensite； twin；

【基金】国家自然科学基金资助项目 (5 0 0 710 69)

【文献出处】中国有色金属学报 ,The Chinese Journal of Nonferrous Metals , 编辑部邮箱 ,2003年01期

【分类号】TG156.3
【被引频次】5
【下载频次】179

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