使用示差扫描量热仪(DSC)和拉伸实验研究了Cr掺杂对550℃退火态Ti-50.8Ni(原子分数,%)形状记忆合金相变和循环形变特性的影响.结果表明,Ti-50.8Ni合金冷却/加热时发生B2→R→M/M→B2型可逆相变,掺杂0.3%Cr后所得Ti-50.8Ni-0.3Cr合金的相变类型为B2→R→M/M→R→B2,相变温度大幅度降低.室温下,Ti-50.8Ni和Ti-50.8Ni-0.3Cr合金的相组成均为母相B2,前者呈现形状记忆效应,后者呈现超弹性.随循环变形次数n的增加,Ti-50.8Ni合金的特性由形状记忆效应演变为线性超弹性,合金的应力诱发马氏体临界应力和积累残余应变迅速增加;Ti-50.8Ni-0.3Cr合金的特性由非完全超弹性演变为完全超弹性,超弹性应力-应变曲线形态比较稳定.随n增加,Ti-50.8Ni合金的超弹性残余应变εr减小,超弹性应变恢复率ηs增加;Ti-50.8Ni-0.3Cr合金的εr和ηs则分别稳定在较低和较高水平,超弹性稳定.
参考文献
[1] | Otsuka K,Wayman C M.Shape Memory Materials.Cambridge:Cambridge University Press,1998:220 |
[2] | He Z R,Wang F,Zhou J E.Heat Treat Met,2006; 31(9):17(贺志荣,王芳,周敬恩.金属热处理,2006;31(9):17) |
[3] | Kim J I,Miyazaki S.Metall Mater Trans,2005; 36A:3301 |
[4] | He Z R,Wang F.Acta Metall Sin,2010; 46:329(贺志荣,王芳.金属学报,2010;46:329) |
[5] | He Z R,Wang F,Wang Y S,Xia P J,Yang B.Acta Metall Sin,2007; 43:1293(贺志荣,王芳,王永善,夏鹏举,杨波.金属学报,2007;43:1293) |
[6] | Liu A L,Sui J H,Lei Y C,Cai W,Gao Z Y,Zhao L C.J Mater Sci,2007; 42:5791 |
[7] | Adharapurapu R R,Vecchio K S.Exp Mech,2007; 47:365 |
[8] | Soga Y,Doi H,Yoneyama T.Mater Med,2000; 11:695 |
[9] | Chen F.Mech Eng,2009; 10:21(陈芳.机械工程师,2009;10:21) |
[10] | Shang Z J,Wang Z M,Yin G S,Zheng B Y.Rare Met Mater Eng,2009; 38:460(商泽进,王忠民,尹冠生,郑碧玉.稀有金属材料与工程,2009;38:460) |
[11] | Zhang X P,Liu H Y,Yuan B,Zhang Y P.Mater Sci Eng,2008; A481:170 |
[12] | Carl P F,Alicia M O,Jeffrey T,Ken G,Hans J M.Metall Mater Trans,2004; 35A:2013 |
[13] | Cho G B,Kim Y H,Hur S G,Yu C A,Nam T H.Met Mater Int,2006; 12:181 |
[14] | He Z R,Wang F.Acta Metall Sin,2008; 44:23(贺志荣,王芳.金属学报,2008;44:23) |
[15] | Tahara M,Kim H Y,Hosoda H,Miyazaki S.Acta Mater,2009; 57:2461 |
[16] | Miyazaki S,Imai T,Igo Y,Otsuka K.Metall Trans,1986; 17A:115 |
[17] | Eucken S,Duering T W.Acta Metall,1989; 37:2245 |
[18] | Zhao L C,Cai W,Zheng Y F.Shape Memory Effect and Superelasticity in Alloys.Beijing:National Defense Industry Press,2002:121(赵连城,蔡伟,郑玉峰.合金的形状记忆效应与超弹性.北京:国防工业出版社,2002:121) |
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