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Ni含量和固溶时效处理对TiNi形状记忆合金多阶段相变的影响(英文) 被引量:2

Effects of Ni Content and Solution-Aging Treatment on Multi-Stage Transformations of TiNi Shape Memory Alloys
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摘要 用示差扫描量热仪研究了Ni含量和固溶时效处理对Ti100-xNix(x=33.3-75)合金相变类型和相变温度的影响。结果表明,固溶淬火态Ti100-xNix合金发生B2→B19′一阶段相变,x=40-49时,合金相变温度(TM)保持恒定不变,x=49-52时急剧下降,x=52-56时逐渐升高,x=56-70时又保持不变。Ti100-xNix合金在773K时效3.6ks和36ks后,x=40~50.5时,合金发生B2→B19′一阶段相变,随着x的增加,TM先保持不变,然后突然下降;x=50.5-52时,合金发生B2→R→B19′两阶段相变,随着x的增加,TM逐渐下降;x=53-70时,合金发生三阶段相变,随着x的增加,相变温度TM1和TM2先升高,后趋于恒定值。Ti100-xNix合金在773K时效360ks后,除了x=51合金发生B2→R→B19′两阶段相变和x=53合金发生三阶段相变比较特殊外,其余合金都发生B2→B19′一阶段相变。 Effects of Ni content and solution-aging treatment on transformation type and transformation temperature of Ti100-xNix(x=33.3-75) alloys were investigated by differential scanning calorimeter(DSC).The results show that one-stage transformation B2→B19' of the solution-quenched Ti100-xNix alloys occurs.The martensitic transformation temperature TM is constant at x = 40-49,decreases sharply at x = 49-52,increases gradually at x = 52-56,and is constant again at x = 56-70.The alloys after aging at 773 K for 3.6 ks and 36 ks will have the occurrence of one-stage transformation B2→B19' at x = 40-50.5,and the TM is constant first and then decreases suddenly with increasing of x;when x = 50.5-52,the alloys have the occurrence of two-stage transformation B2→R →B19' and the TM decreases gradually with increasing of x;when x=53-70,the alloys have the occurrence of three-stage transformation and the TM1 and TM2 all increase first and then keep constant with increasing of x.All alloys after aging at 773 K for 360 ks have the occurrence of one-stage transformation B2→B19' except for Ti49Ni51 and Ti47Ni53 alloy,which will have the occurrence of two-stage transformation B2→R→B19' and three-stage transformation,respectively.
作者 王启 贺志荣 刘曼倩 杨军 刘艳 Wang Qi,He Zhirong,Liu Manqian,Yang Jun,Liu Yan Shaanxi University of Technology,Hanzhong 723003,China
机构地区 陕西理工学院
出处 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2011年第3期395-398,共4页 Rare Metal Materials and Engineering
基金 Natural Science Foundation of Shaanxi Province (2009JM6010) Special Scientific Research Program Founded by Shaanxi Provincial Education Department (09JK375)
关键词 TI-NI合金 形状记忆合金 固溶时效处理 多阶段相变 TiNi alloy shape memory alloy solution-aging treatment multi-stage transformation
作者简介 王启,男,1985年生,硕士生,陕西理工学院材料科学与工程学院,陕西汉中723003; 通讯作者,贺志荣,博士,教授。电话:0916-2291079,E-mail:hezhirong01@163.com
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