温度循环对镍钛形状记忆合金超弹性和相变行为的影响
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摘要
通过拉伸试验和差示扫描量热法(DSC)等手段,研究了高温时效和高温、低温循环对镍钛形状记忆合金超弹性和相变行为的影响。结果表明,TNC1605镍钛合金在500℃时效后具有较高的上/下平台强度,并且具有较低的残余应变,马氏体逆相变终了温度Af约为22℃,具有较好的超弹性能。经过10次200℃高温保温4 h和液氮中保温4 h的高低温循环处理后,下平台强度、6%拉伸加载和卸载后残余应变、Af和超弹性性能参数保持稳定。
The effects of high temperature aging, high temperature and low temperature cycling on the superelasticity and phase transformation behavior of Ni Ti shape memory alloy were studied by means of tensile test and differential scanning calorimetry(DSC). The results show that after aging at 500 ℃, TNC1605 Ni Ti shape memory alloy has higher upper/lower plateau strengths, and has low residual strain. Martensite reverse phase transition finish temperature Afis about 22 ℃, which has good superelastic property. After cycle treatment 10 times at 200 ℃ for 4 h and liquid nitrogen for 4 h, the lower strength,the residual strain at the 6% tensile loading and then unloading, Afand superelastic property parameters keep stable.
The effects of high temperature aging, high temperature and low temperature cycling on the superelasticity and phase transformation behavior of Ni Ti shape memory alloy were studied by means of tensile test and differential scanning calorimetry(DSC). The results show that after aging at 500 ℃, TNC1605 Ni Ti shape memory alloy has higher upper/lower plateau strengths, and has low residual strain. Martensite reverse phase transition finish temperature Afis about 22 ℃, which has good superelastic property. After cycle treatment 10 times at 200 ℃ for 4 h and liquid nitrogen for 4 h, the lower strength,the residual strain at the 6% tensile loading and then unloading, Afand superelastic property parameters keep stable.
引文
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[2] Christian Sander, Franz Martin Sander, Franz Gunter Sander.The derotation of premolars and canines with NiTi elements[J].J Orofacial Orthopedics,2006,67:117-126.
[3] Dolce M, Cardone D.Mechanical behaviour of shape memory alloys for seismic appl ications 1:martensite and austenite NiTi bars subjected to torsion[J].Inter J Mech Sci,2001,43(11):2631-2656.
[4] Dong Y S, Xiong J L, Li A Q, et a1.A passive damping device with TiNi shape memory alloy rings and its properties[J].Mater Sci Eng A,2006,416:92-97.
[5] Zabolotnyi V T, Belousov O K, Palii N A, et al.Materials science aspects of the production, treatment, and properties of titanium nickelide for application in endovascular surgery[J].Russian Metallurgy(Metally),2011,5:437-448.
[6]刘书芹,袁志山,王江波.热变形对TiNi形状记忆合金丝材力学性能以及超弹性的影响[J].热加工工艺,2007,36(22):20-23.
[7]刘克勇,蔡伟,赵连城.长期约束条件下TiNi合金超弹性衰减研究[J].功能材料,2009,40(2):260-264.
[8]高滨.形状记忆合金在航天器分离机构上的应用[J].航天返回与遥感,2005,26(1):48-52.
[9]田青超,吴建生.不同相变行为Ti50.6Ni19.4Pd30合金的力学性能表征[J].机械工程材料,2003,27(7):38-41.
[10]袁志山,吴艳华,王永辉,等.时效处理对镍钛合金丝材超弹性的影响[J].金属热处理,2014,39(11):80-83.
[11] 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.
[12]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.
[13] Rainer H, Shorash M.Assessment of the influence of R-phase formation on the material behavior of NiTi using a micromechanical model[J].Functional Materials Letters,2013,5(1):413-415.
[14] 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 low-temperature martensite transformation[J].Dental Materials,2008,24(2):204-210.
[15] 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 Engineer ing,2011,40(3):395-398.
[16] 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,2005,28-30:141-147.
[17] Tan L, Crone W C.In situ TEM observation of two-step martensitic transformation in aged Ni-Ti shape memory alloy[J].Scripta Materialia,2005,50(6):819-823.
[18]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.
[19] Tong Y X, Liu J T, Chen F, et al.Effect of aging on martensitic transformation and superelasticity of TiNiCr shape memory alloy[J].Trans. Nonferrous Met. Soc. China,2014,24:2598-2605.
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