采用极图和取向分布函数方法研究了Ti50 Ni49.5 Fe0.5形状记忆合金的马氏体相变织构和变体选择规律,比较了热诱发和应力诱发之差异.结果表明,奥氏体主要含有(111)纤维织构和(111) [-1-12]板织构.热诱发的马氏体主要含有(102),(10-2)和(120)系列织构,按照马氏体相变的Bain畸变晶体学唯象理论,分析了所有马氏体孪生变体的织构演变规律,表明热诱发马氏体中12种变体均存在；但应力诱发马氏体相变,变体选择具有择优性,择优规律遵循Schmid定律,即主要是S因子最大和次大的1,2’,3’,4’和2,4变体,但也伴随着微弱的低S因子变体5,6,6’,可能是多晶的催化协同作用,马氏体再取向等原因引起的.
参考文献
| [1] | 刘克勇,雷永超,蔡伟,赵连城.钛镍形状记忆合金的研究进展[J].材料研究与应用,2007(02):86-90. |
| [2] | 尹向前,王淑娟,李艳锋,解浩峰,米绪军.TiNiFe形状记忆合金热变形行为的研究[J].稀有金属,2012(06):851-857. |
| [3] | K. Otsuka;X. Ren .Physical metallurgy of Ti-Ni-based shape memory alloys[J].Progress in materials science,2005(5):511-678. |
| [4] | K. GALL;H. SEHITOGLU;Y. I. CHUMLYAKOV .TENSION-COMPRESSION ASYMMETRY OF THE STRESS- STRAIN RESPONSE IN AGED SINGLE CRYSTAL AND POLYCRYSTALLINE NiTi[J].Acta materialia,1999(4):1203-1217. |
| [5] | H. SEHITOGLU;J. JUN;X. ZHANG .SHAPE MEMORY AND PSEUDOELASTIC BEHAVIOR OF 51.5 percent Ni-Ti SINGLE CRYSTALS IN SOLUTIONIZED AND OVERAGED STATE[J].Acta materialia,2001(17):3609-3620. |
| [6] | Mao SC;Han XD;Zhang Z;Wu MH .The nano- and mesoscopic cooperative collective mechanisms of inhomogenous elastic-plastic transitions in polycrystalline TiNi shape memory alloys[J].Journal of Applied Physics,2007(10):3522-1-3522-8-0. |
| [7] | J.A.SHAW;S.KYRIAKIDES .ON THE NUCLEATION AND PROPAGATION OF PHASE TRANSFORMATION FRONTS IN A NiTi ALLOY[J].Acta materialia,1997(2):683-700. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%