热处理对镍钛合金丝材超弹性和相变的影响
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摘要
通过差示扫描量热仪和拉伸测试等手段,研究退火温度和时间对镍钛形状记忆合金超弹性和相变的影响。拉伸测试结果表明:在400、450、500、550和600℃退火保温5、10、15、20和30 min过程中,随着退火温度升高或退火时间延长,合金的超弹性下降,低温短时退火易获得良好的超弹性。DSC测试结果表明:随退火温度的升高,马氏体-奥氏体逆相变终了温度降低;随着退火时间延长,马氏体-奥氏体逆相变终了温度逐渐升高。循环拉伸测试结果表明,随着退火温度升高或退火时间的延长,合金的残余应变不断增大。
The effect of annealing treatment on superelasticity and phase transformation of nitinol shape memory alloy was investigated by means of tensile test and differential scanning calorimetry( DSC). The tensile test results show that with the increasing of annealing temperature( 400,450,500,550 and 600 ℃) or annealing time( 5,10,15,20 and 30 min),the superelasticity of the alloy decreases,and the good superelasticity of the alloy can be obtained when annealed at low temperature or for a short annealing time. The DSC test results show that the final temperature of martensite-austenite inverse transformation decreases with the increase of annealing temperature,but increases gradually with the annealing time prolonging. The cyclic tensile test results show that with increasing annealing temperature or annealing time,the residual strain of the alloy increases gradually.
The effect of annealing treatment on superelasticity and phase transformation of nitinol shape memory alloy was investigated by means of tensile test and differential scanning calorimetry( DSC). The tensile test results show that with the increasing of annealing temperature( 400,450,500,550 and 600 ℃) or annealing time( 5,10,15,20 and 30 min),the superelasticity of the alloy decreases,and the good superelasticity of the alloy can be obtained when annealed at low temperature or for a short annealing time. The DSC test results show that the final temperature of martensite-austenite inverse transformation decreases with the increase of annealing temperature,but increases gradually with the annealing time prolonging. The cyclic tensile test results show that with increasing annealing temperature or annealing time,the residual strain of the alloy increases gradually.
引文
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[21]Yoon S H.Phase transformations of nitinol shape memory alloy by varying with annealing heat treatment conditions[C]//Smart Materials,Nano-,and Micro-Smart Systems.International Society for Optics and Photonics,2004:639-655.
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[2]郑玉峰,Yinong Liu.工程用镍钛合金[M].北京:科学出版社,2014.
[3]Pelton A R,Dicello J,Miyazaki S.Optimisation of processing and properties of medical grade nitinol wire[J].Minimally Invasive Therapy&Allied Technologies,2000,9(2):107-118.
[4]Stockel D.Nitinol medical devices and implants[J].Min Invasive Ther Allied Techonl,2000,9(2):81-88.
[5]马长生,盖鲁粤,张奎俊,等.介入心脏病学[M].北京:人民卫生出版社,1998.
[6]Jiang S Y,Zhang Y Q,Zhao Y Q.Dynamic recovery and dynamic recrystallization of Ni-Ti shape memory alloy under hot compression deformation[J].Transactions of Nonferrous Metals Society of China,2013,23(1):140-147.
[7]王晓亮.Ti-50.1Ni形状记忆合金相变与形变行为[J].金属热处理,2013,38(2):52-55.WANG Xiao-liang.Transformation and deformation behavior of Ti-50.1Ni shape memory alloy[J].Heat Treatment of Metals,2013,38(2):52-55.
[8]Rainer H,Shorash M.Assessment of the influence of R-phase formation on the material behavior of Ni-Ti using a micromechanical model[J].Functional Materials Letters,2012,5(1):15-18.
[9]Brantley W A,Brantley W H,Guo W A T,et al.Microstructural studies of 35℃copper Ni-Ti orthodontic wire and TEM confirmation of lowtemperature martensite transformation[J].Dental Materials,2008,24(2):204-210.
[10]Wang Q,He Z R,Liu M Q,et al.Effects of Ni content and solution-aging treatment on multi-stage transformations of Ti-Ni shape memory alloys[J].Rare Metal Materials and Engineering,2011,40(3):395-398.
[11]Ramaiah K V,Saikrishna C N,Bhaumik S K.Processing of Ni-Ti shape memory alloy wires[C]//Proceedings of ISSS 2005,International Conference on Smart Materials Structures and Systems,Bangalore,India,July,2005,28/30:141-147.
[12]Tan L,Crone W C.In situ TEM observation of two-step martensitic transformation in aged Ni-Ti shape memory alloy[J].Scripta Materialia,2004,50(6):819-823.
[13]高静,杨冠军,杨宏进,等.热处理对医用Ti-Ni细丝显微组织及形状记忆效应的影响[J].稀有金属材料与工程,2005,34(2):299-302.GAO Jing,YANG Guan-jun,YANG Hong-jin,et al.Effect of heat treatment on microstructure and shape memory effect of biomedical Ti Ni alloy fine wire[J].Rare Metal Materials and Engineering,2005,34(2):299-302.
[14]李艳锋,米绪军,高宝东,等.热处理对Ti-Ni合金显微组织和力学性能的影响[J].金属热处理,2009,34(8):40-43.LI Yan-feng,MI Xu-jun,GAO Bao-dong,et al.Effect of heat treatment on microstructure and mechanical properties of Ti-Ni alloy[J].Heat Treatment of Metals,2009,34(8):40-43.
[15]袁志山,吴艳华,王永辉,等.时效处理对钛镍合金丝材超弹性的影响[J].金属热处理,2014,39(11):78-81.YUAN Zhi-shan,WU Yan-hua,WANG Yong-hui,et al.Effect of aging on superelasticity of nickel-titanium shape memory alloy wires[J].Heat Treatment of Metals,2014,39(11):78-81.
[16]Philip T V,Beck P A.Cs Cl-type ordered structures in binary alloys of transition elements[J].Transaction of American Institute of Mining,Metallurgical,and Petroleum Engineers,1957,209:1269-1271.
[17]Hara T,Ohba T,Otsuka K,et al.Phase transformation and crystal structures of Ti2Ni3precipitates in Ti-Ni alloys[J].Materials Transactions of the Japan Institute of Metals,1997,38:277-284.
[18]Favier D,Liu Y,Mccormick P G.Three stage transformation behaviour in aged Ni Ti[J].Scripta Metallurgica Et Materialia,1993,28(6):669-672.
[19]Jiang F,Liu Y,Yang H,et al.Effect of ageing treatment on the deformation behaviour of Ti-50.9 at.%Ni[J].Acta Materialia,2009,57(16):4773-4781.
[20]Fukuda T,Saburi T,Doi K,et al.Nucleation and self-accommodation of the R-Phase in Ti-Ni alloys[J].Materials Transactions,2007,33(3):271-277.
[21]Yoon S H.Phase transformations of nitinol shape memory alloy by varying with annealing heat treatment conditions[C]//Smart Materials,Nano-,and Micro-Smart Systems.International Society for Optics and Photonics,2004:639-655.
[22]阚前华,康国政,宋迪,等.残余应变对镍钛形状记忆合金超弹性抑制效应的实验研究[C]//四川省力学学会2012年学术年会.2012.KAN Qian-hua,KANG Guo-zheng,SONG Di,et al.Experimental Research on Inhibition of Residual Strain to Super-elasticity of Ni Ti Shape Memory Alloy[C]//Annual Meeting of Si Chuan Society of Mechanics,2012.