钼离子注入奥氏体不锈钢引发亚结构的变化  

Substructure variation of austenitic stainless steel affected by Mo ion implantation

作　　者：黄岩[1] 黑祖昆[1] 

机构地区：[1]大连海事大学船机修造及金属材料工艺研究所

出　　处：《核技术》1997年第6期321-326,共6页Nuclear Techniques

基　　金：国家教委博士点基金

摘　　要：用加速电压为５０ｋＶ、剂量为２×１０１７ｉｏｎｓ／ｃｍ２的钼离子注入经１１５０℃固溶处理的奥氏体不锈钢（１Ｃｒ１８Ｎｉ９Ｔｉ）中，利用透射电子显微镜弱束成像技术研究了被注入材料的横截面样品，发现离子辐照引发被注入材料亚结构变化的深度远大于离子本身的注入深度，其亚结构为多种位错组成的复杂位错组态，这种亚结构会使被注入材料具有相当于加工硬化的效果。探讨了离子注入材料中由辐照引发的加工硬化现象，即所谓的“长程效应”A beam of Mo ions with an accelerating voltage of 50kV and a dose of 2×10 17 ions/cm 2 has been implanted in the Austenitic stainless steel with 1150℃ solution heat treatment. The cross-section substructures of the implanted samples were studied with the weak beam technique of the transmission electron microscopy. It was found that depth of the radiation damage was far greater than the ion range, and the substructure was the complex dislocation configuration similar to the effect of the work hardening. The reason of the so-called “long-range effect” of the work hardening in the ion-implanted materials affected by the radiation damages has been discussed.

关 键 词：离子注入 奥氏体不锈钢 位错 钼离子 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TG142.13[金属学及工艺—金属材料]