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。
Grain boundary migration-induced directional coarsening of the gamma ' phase in advanced ultra-supercritical superalloy
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论文类型：期刊论文
发表时间：2018-01-31
发表刊物：MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
收录刊物：SCIE、EI
卷号：714
页面范围：172-178
ISSN号：0921-5093
关键字：Creep; Ni-based superalloy; Advance ultra-supercritical; Microstructure; Grain boundary
摘要：This study investigated the features of grain boundary regions in a Ni-based superalloy which underwent creep deformation. Large grain boundary zones were denuded in fine gamma' precipitates but contained coarsened micro scale gamma' rods. The coarsening direction of these rods was along the < 110 > of the gamma matrix and gamma' precipitates. The orientation of the grain boundary zone was the same as that of the adjacent grain behind the migrating boundary. This result indicated that the formation of these zones was accompanied by the migration of the grain boundary. Then, numerous slip features were observed through detailed local disorientation analysis. It is proposed that the driving force for the grain boundary migration was the local stress induced by the dislocation creep. The dissolution reprecipitation of the precipitates at the boundary migration front resulted in the directional coarsening of the gamma' rods.
发表时间：2018-01-31
