| TiNi形状记忆合金断裂机理的原位拉伸研究 |
| |
| 引用本文： | 孙伟,陈剑虹,姚海军,曹睿.TiNi形状记忆合金断裂机理的原位拉伸研究[J].兰州理工大学学报,2005,31(1):9-13. |
| |
| 作者姓名： | 孙伟 陈剑虹 姚海军 曹睿 |
| |
| 作者单位： | 兰州理工大学,材料科学与工程学院,甘肃,兰州,730050;兰州理工大学,材料科学与工程学院,甘肃,兰州,730050;兰州理工大学,甘肃省有色金属新材料国家重点实验室,甘肃兰州,730050 |
| |
| 基金项目： | 国家自然科学基金(59871015) |
| |
| 摘 要： | 用SEM原位拉伸实验对TiNi形状记忆合金试样的断裂过程进行了研究和分析．结果表明，TiNi形状记忆合金的断裂与钢的脆性解理断裂不同．TiNi形状记忆合金的断裂受解理机制和孔洞在第二相颗粒处的形核、长大、连接机制控制．这两种材料失效机制共同作用，其中哪一种占统治地位取决于诸多因素．应力诱发马氏体相变对TiNi形状记忆合金的断裂具有重要的影响．
|
| 关 键 词： | TiNi形状记忆合金 断裂过程 原位实验观察 |
| 文章编号： | 1000-5889(2005)01-0009-05 |
Investigation of fracture mechanisms of titanium-nickel shape memory alloys by means of in situ tension |
| |
| SUN Wei,CHEN Jian-hong,YAO Hai-jun,CAO Rui.Investigation of fracture mechanisms of titanium-nickel shape memory alloys by means of in situ tension[J].Journal of Lanzhou University of Technology,2005,31(1):9-13. |
| |
| Authors: | SUN Wei CHEN Jian-hong YAO Hai-jun CAO Rui |
| |
| Institution: | SUN Wei~1,CHEN Jian-hong~ |
| |
| Abstract: | Fracture mechanism of titanium-nickel shape memory alloys specimens are observed and analyzed carefully in situ SEM tensile experiment.Investigation results indicate that fracture of TiNi shape memory alloys is different from brittle cleavage fracture of steels.The former is controlled by cleavage mechanism coupled with void nucleation, growth, and coalescence at the position of second phase particles.The tow mechanisms of material failure act in conjunction with one another and the dominance of one over the other depends on many factors.The reversible stress induced martensitic transformation has a very important effect on the fracture of TiNi shape memory alloys. |
| |
| Keywords: | titanium-nickel shape memory alloys fracture process in situ observation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
