摘要
Ｆｅ－Ｍｎ－Ｓｉ合金的形状记忆效应来源于马氏体相变，而马氏体相变则通过奥氏体内形成每隔一层｛１１１｝面上的堆垛层错来完成。与层错能相关的层错几率可能控制马氏体的相变机制。本文根据Ｗａｒｅｎ的衍射理论，用Ｘ射线衍射峰位移和峰宽化两种方法测定了Ｆｅ－Ｍｎ－Ｓｉ合金的层错几率，其结果表明随锰含量增加，层错几率降低。本文着重对提高衍射峰位移和峰宽化两种测定方法的精度及其影响因素进行详细的研究。
The shape memory effect of Fe-Mn-Si alloy is the result from the martensitic transformation,while the martensitic transformation is completed by means of stackingfault on every second layer of {111} planes in austenite.The martensitic transformation mechanism may be controlled by stackingfault probability (SFP) associated with the stacking-fault energy.The stackingfault probabilities of Fe-Mn-Si alloys have been determined in this paper using the two methods (peakshift and peakbroad) of Xray diffraction on the basis of Warren's theory.The results indicated that the SFP decreased with increase of the content of Mn.In the present work, it is emphasized the research on the improvement of precision and influence factors for these two methods,and it is considered that peakshift method is simpler.
出处
《功能材料》
EI
CAS
CSCD
北大核心
1999年第2期155-157,共3页
Journal of Functional Materials
基金
国家自然科学基金
