文献类型：期刊文献

中文题名：16MnR钢中疲劳裂纹扩展的细观研究

英文题名：Meso mechanical Investigation of Fatigue Crack Propagation in 16MnR Steel

作者：冯江蔚[1];潘家祯[1];朱大滨[1]

机构：[1]华东理工大学化工机械研究所

年份：1998

卷号：24

期号：1

起止页码：93

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;国家哲学社会科学学术期刊数据库;Scopus;北大核心:【北大核心1996】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金;高校博士学科点基金

语种：中文

中文关键词：低合金钢;滑移带;疲劳裂纹;裂纹扩展

外文关键词：short fatigue cracks;low carbon steel;slip bands;plastic deformation zone

摘要：采用显微疲劳试验方法和显微疲劳试验装置对低合金钢１６ＭｎＲ单边缺口试样进行了疲劳试验，研究了短裂纹萌生和扩展的特征。结果表明，短裂纹萌生及扩展分三个阶段，每一阶段的形貌都有其特点，在裂纹扩展后期，短裂纹的发展以裂纹密度不断增加并形成损伤区为主要特征，然后在损伤区选择一条主裂纹扩展。
The fatigue experiments were conducted on one side notched specimens of low carbon steel 16MnR,by using microscopic fatigue testing device. Some characteristics of short crack initiation and propagation were examed.The experimental results show that there are three stages of short crack propagation.Each stage showes its own features.The first stage shows brittle appearence without slip bands.The second stage shows limited slipping within limited area. At the final stage of crack propagation,the main characters of the crack development are increasing small crack density,forming damaged area,and then choosing one of the small crack as main crack to develop.