复合稀土对Fe-Mn-Si-Ni-C合金形状记忆效应的影响

Effect of Compound Rare Earth on Shape Memory Effect of Fe-Mn-Si-Ni-C Shape Memory Alloy

通过弯曲法测量、热循环训练、扫描电镜、X射线衍射等方法,研究了复合稀土对Fe Mn Si Ni C合金形状记忆效应的影响。研究结果表明,Fe Mn Si Ni C合金中加入复合稀土,能够明显细化合金的金相组织,显著提高合金的形状记忆效应,并使合金表现出微弱的双程记忆效应。试验结果还表明,第一种训练途径以及加入微量复合稀土是降低应力诱发ε马氏体稳定化行之有效的方法,X射线衍射结果表明,该训练方法有助于提高合金中ε→γ转变的ε逆转变率,对提高合金的记忆性能起积极的作用。

Effect of compound rare earth (RE) on shape memory effect (SME) of FeMnSiNiC shape memory alloy was studied by bent measurement, thermal cycle training, SEM and XRD etc. The results show that metallurgic microstructure is refined and SME improved evidently with addition of compound RE. The alloy appeares little twoway shape memory effect. The former training and addition of compound RE ane two effective ways to restrain martensitic stability. XRD analysis also indicates that ε→γ reversible transition ratio increases by training is a great help to improve SME of the alloy.