淬火在Cu-Zn-Al合金马氏体中引入的一种新缺陷

A NEW KIND OF QUENCHING INDUCED PLANAR DEFECT OF MARTENSITE IN Cu-Zn-Al ALLOY

本文报道了Cu-Zn-Al合金中18R马氏体里存在的一类新的面缺陷。实验结果的统计表明,在由高温直接淬入冰水中的样品里,马氏体中常出现非基面上的层错。衍衬分析证明,这种层错常位于(125)_M面上。通过对晶体结构和处理条件分析,提出了这种层错出现的机制,并给出了层错的结构模型。

A new kind of planar defect named non-basal plane stacking faults has been stud-ied using trace analysis and lattice image technique. It has been found that they are located in(125)_M plane of martensite lattice. By lattice image observation, the non-basal plane stackingfaults are argued to be induced by two incomplete basal plane stacking faults and may be theresults of fast quenching. The defects are regarded as anomalous structures of martensite.