1Cr18Ni9不锈钢精细结构分析

FINE STRUCTURE ANALYSIS OF DEFORMED AUSTENITE STAINLESS STEEL 1Cr18Ni9

本文用X射线衍射仪阶梯扫描法获得1Cr18Ni9不锈钢在不同形变量的衍射强度分布曲线,经线形分析得到有效亚晶块大小D_(?ff),块内位错密度参量ρ和排列方式M,体弹性贮能密度(E/V)等结构参量。同时用X射线法和TEM法对比,两者测得真正亚晶块大小D_0基本相同,而测得的层错宽度T的最小值和特征值却不相同。这可能与层错宽度变化范围有关。

The intensity distribution curves for austenite stainless steel 1Cr18Ni9 after 1080℃ W. Q. and de-formed under uniaxial tension at different degrees of strain have been examined by step scanning X--ray diffraction technique. The effective domain size, dislocation density inside domains, dislocation istrubution parameter, density of stored energy, etc. were obtained by profile analysis. In comparison with TEM observation,the grain is similar in size to subgrain, but the minimum width of stacking faults differs with the characteristic one, which may be related to the variation of stacking fault width