MULTI-SCALE FINITE ELEMENT SIMULATION OF SEVERE PLASTIC DEFORMATION

摘要：

The technique of severe plastic deformation (SPD) enables one to produce metals and alloys with an ultrafine grain size of about 100 nm and less. As the mechanical properties of such ultrafine grained materials are governed by the plastic deformation during the SPD process, the understanding of the stress and strain development in a workpiece is very important for optimizing the SPD process design and for microstructural control. The objectives of this work is to present a constitutive model based on the dislocation density and dislocation cell evolution for large plastic strains as applied to equal channel angular pressing (ECAP). This paper briefly introduces the constitutive model and presents the results obtained with this model for ECAP by the finite element method.

关键词： Equal Channel Angular Pressing (ECAP) severe plastic deformation constitutive modeling finite element analysis dislocation density dislocation cell size

作者: HYOUNG SEOP KIM

作者单位: Department of Materials Science and Engineering, POSTECH, San 31, Hyoja-dong, Nam-gu Pohang, Gyungbook, 790-784, KOREA

会议类型: 国际会议

会议名称: 第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)

会议地点: 哈尔滨

会议语种:英文

页码: 1621-1626

在线出版日期: 2008-09-03（万方平台首次上网日期，不代表论文的发表时间）