摘要
利用电阻温度曲线测量、记忆效应测量、金相观察、Ｘ射线衍射等方法研究了Ｃｕ－１４．５％Ｚｎ－７．１％Ａｌ合金热弹性马氏体稳定化过程．发现在马氏体稳定化过程中除马氏体晶格常数ａ与ｃ增大，ｂ减小，ａ／ｂ→０．８６６，β→９０°外，尚存在马氏体浮凸、逆向记忆效应及马氏体电阻增大等现象．根据马氏体相变晶体学对上述现象进行了分析，认为马氏体稳定化是一个类似于贝氏体转变的扩散型切变转变，它可看成是β１→Ｍ转变的继续．
The martensite stabilization of Cu 14.5%Zn 7.1%Al alloy was studied by means of ρ T curve and SME measurements,optical metalloscope observation and X ray diffraction. It was shown that the martensite stabilization was accompanied by the relief phenomenon of the martensites,reverse SME and electrical resistance increase of the martensite, in adition to the changes of lattice paremeters,such as the increase of a and c , decrease of b , a/b →0.866 and β →90°.The results were discussed according to the crystallorgraphy of the martensite transformation. It is suggested that the martensite stabilization is a diffusional and shear type transformation, similar to the bainite transformation, which can be taken as a continuation of β 1 →M transformation.
出处
《中南工业大学学报》
CSCD
北大核心
1997年第1期53-56,共4页
Journal of Central South University of Technology(Natural Science)
基金
湖南省自然科学基金
