学位：博士
职称：教授
所在单位：材料科学与工程学院
长期从事金属材料蠕变、组织演化、损伤及寿命预测工作。主持和参加国家自然科学基金重点和面上项目6项，“863”计划课题2项，省部级及企业项目20余项。获国家发明专利5项，发表学术论文200余篇。出版专著“耐热钢持久性能的统计分析及可靠性预测”1部（科学出版社），译著“高温合金”1部，编著1部。获辽宁省教学名师，宝钢教育奖优秀教师奖。辽宁省教学成果一等奖1项，国家本科一流课程、国家精品在线开放课程负责人。Emerald出版社颁发的学术奖“Literati Club Awards for Excellence”，金属学报2009-2015年度优秀论文奖。省部级科技奖励一等奖、二等奖5项。
The occurrence of room-temperature creep in cracked 304 stainless steel specimens and its effect on crack growth behavior
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论文类型：期刊论文
发表时间：2008-06-15
发表刊物：14th International Conference on the Strength of Materials (ICSMA 14)
收录刊物：SCIE、EI、CPCI-S
卷号：483-84
期号：,SI
页面范围：572-575
ISSN号：0921-5093
关键字：stainless steel; room-temperature creep; crack growth; retardation effect; crack closure
摘要：With the improvement of measurement accuracy, room-temperature creep has been observed in many metallic materials. In the present paper, a SUS304 stainless steel is selected to investigate room-temperature creep at a crack tip and its influence on subsequent fatigue crack growth. Time-dependent deformation at crack tips under constant stress intensity factor was detected at room temperature. The creep deformation is found to increase with increasing overload ratio and constant stress intensity factor. Loading conditions, such as unloading and/or reloading have a significant influence on the deformation. Compared to single wave overload, room-temperature creep under the same overload ratio produces more retardation on subsequent fatigue crack growth behavior. It is shown that crack closure plays a dominant role in this retardation effect. (C) 2007 Elsevier B.V. All rights reserved.
发表时间：2008-06-15
