Hardness and microstructure distribution of HPT processed IF steel disks in the compressive stage

摘要：

　　Plastic deformation behavior,hardness,and microstructure distribution of IF steel disks on the different testing planes (thickness direction and radial direction) during the compressive stage of high pressure torsion are investigated.There exists a hardness inhomogeneity on the compressed disks,showing higher hardness in edge,lower hardness in center,and considerably uniform hardness in radial medium of the disks.However,in axial center,there is a soft region near the surface of the disks and the soft region decreases with increasing the pressure.Another soft region lying in the outer edge of disk named ‘dead metal zone’ was also measured and inspected.Furthermore,there also exists a high value of hardness near the central position on the thickness direction named ‘hardness hill’.The characteristics of the microstructure and grain deformation even following the appearance of hardness distributions were determined by the strain inhomogeneity.The analysis results present that friction between the disk and anvil and the geometries of the dies play a main role on the deformation process during the compressive stage.

关键词： high-pressure torsion (HPT) compressive stage inhomogeneity distribution IF steel disks

作者: Yuepeng Song HyoungSeop Kim Dongsheng Gao Wenke Wang EunYoo Yoon DongJun Lee ChongSoo Lee

作者单位: Mechanical and Electronic Engineering College, Shandong Agricultural University, Taian 271018, Chin Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang Shandong Provincial Key Laboratory of Horticultural Machineries and Equipments Shandong Agricultural Mechanical and Electronic Engineering College, Shandong Agricultural University, Taian 271018, Chin

会议类型: 国际会议

会议名称: 第五届亚洲微纳成形技术研讨会(AMMFT2012)暨第三届微纳成形学术委员会会议

会议地点: 哈尔滨

会议语种:英文

页码: 57-60

在线出版日期: 2012-08-01（万方平台首次上网日期，不代表论文的发表时间）