航空学报 > 2004, Vol. 25 Issue (6): 611-614

TiNiMo形状记忆合金的相变、形状记忆效应与力学性能研究

丁振, 刘福顺, 李岩, 徐惠彬   

  1. 北京航空航天大学材料科学与工程学院 北京 100083
  • 收稿日期:2003-10-31 修回日期:2004-05-18 出版日期:2004-12-25 发布日期:2004-12-25

Study on Phase Transformation Behaviors, Shape Memory Effects and Mechanical Properties of TiNiMo Shape Memory Alloys

DING Zhen, LIU Fu-shun, LI Yan, XU Hui-bin   

  1. School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2003-10-31 Revised:2004-05-18 Online:2004-12-25 Published:2004-12-25

摘要: 研究了TiNiMo形状记忆合金的相变特性、形状记忆效应和力学性能,结果表明:TiNiMo合金存在一个R相变,Mo的加入降低了TiNi合金的马氏体相变开始温度(Ms),Ti50Ni48.5Mo1.5和Ti50Ni48Mo2.0合金的Ms分别达到了-85℃,-103℃,这两种合金分别在8.51%和8.26%的预应变下获得了8.06%和7.71%的形状记忆效应。Ti50Ni48Mo2.0合金的屈服强度和抗拉强度分别为589MPa和799MPa,比Ti50Ni48Fe2.0的相应强度分别高73%和31%,同时Ti50Ni48.5Mo1.5的力学性能也较为优异,因而TiNiMo合金是很有发展潜力的新型的记忆合金接头材料。

关键词: TiNiMo合金, 相变特性, 形状记忆效应, 力学性能, 管接头

Abstract: Phase transformation behaviors, shape memory effects and mechanical properties of TiNiMo shape memory alloys are investigated. It is found that a R phase transformation exists in TiNiMo alloy, and the adition of Mo will lower the martensite start (Ms) temperature of TiNi alloy, and that the Ms temperatures of Ti(50)Ni(48.5),Mo(1.5 )and Ti(50)Ni(48)Mo(2.0 )alloys are -85℃ and -103℃, respectively. The two alloys will gain 8.06% and 7.71% shape memory effects under 8.51% and 8.26% pre-strain,...

Key words: TiNiMo alloy, phase transformation behavior, shape memory effect, mechanical property, pipe joint