%0 Journal Article
%T TRANSFORMATION OF RETAINED AUSTENITE IN CARBURIZED CASE DURING FATIGUE CRACK GROWTH<br>疲劳断裂过程中渗碳层残余奥氏体的转变
%A JING Xiaotian
%A LOU Bingzhe
%A CU Chenqing
%A SHEN Fusan Shaanxi Institute of Mechanical Engineering Xi''an Deptof Materils
%A Shanxi Institute of Mechanical Engineering Xi''an
%A <br>井晓天
%A 楼秉哲
%A 谷臣清
%A 沈福三
%J 金属学报
%D 1990
%I 
%X 研究了20CrNiMo钢微氮渗碳层中残余奥氏体的形态,及其在疲劳断裂过程中的转变和作用。结果表明:渗碳层残余奥氏体有薄膜状和块状两种形态,由于界面取向的影响,疲劳裂纹更易于穿过块状奥氏体,促使其发生应变诱发马氏体相变。在疲劳断裂过程中,裂纹面附近的残余奥氏体大部分转变成马氏体,这种转变是在断裂瞬间发生的,与疲劳力学条件无关。转变所引起的体积膨胀增强了裂纹闭合效应。相变诱发闭合是渗碳表层高碳区疲劳裂纹扩张行为的主要因素之一。
%K retained austenite
%K fatigue crack growth
%K strain induced martensite transformation
%K phase transformation induced crack closure<br>疲劳
%K 断裂
%K 渗碳层
%K 残余奥氏体
%K 钢
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=7285417AEEC2C13FE38FA28B9FA7A398&yid=8D39DA2CB9F38FD0&vid=96C778EE049EE47D&iid=CA4FD0336C81A37A&sid=16D8618C6164A3ED&eid=94E7F66E6C42FA23&journal_id=0412-1961&journal_name=金属学报&referenced_num=1&reference_num=2