Inhomogeneous Hardness Distribution of High Pressure Torsion Processed IF Steel Disks
Inhomogeneous Hardness Distribution of High Pressure Torsion Processed IF Steel Disks作者机构：Department of Materials Sci- ence and Engineering Pohang University of Science and Technology Pohang Korea Department of Materials Science and Engineering Pohang University of Science and Technology Pohang Korea Mechanical and Electronic Engineering College Shandong Agricultural University Tai’an China Shandong Provincial Key Laboratory of Horticultural Machineries and Equipments Shandong Agricultural University Tai’an China.
出 版 物：《Materials Sciences and Applications》 (材料科学与应用期刊（英文）)
年 卷 期：2012年第3卷第4期
页 面：234-239页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：Hardness Distribution High-Pressure Torsion (HPT) IF Steel Inhomogeneous
摘 要：The inhomogeneous hardness distribution of high pressure torsion (HPT) processed IF steel disks along different directions is investigated. The results indicated that there exists inhomogeneous distribution in HPT processed IF steel disks, giving lower hardness in the center and higher hardness in the edge regions. However, on the axisymmetrical section testing plane of the disks’ thickness direction, there is a soft zone near the surface of disks. Further results from radius testing plane of different depths from the surface of HPT processed disks show that the inhomogeneity rules of hardness distribution on the radius direction are similar to that on the thickness direction. Compared with the initial state, different stages of HPT (compression and compression + torsion) can both remarkably increase the hardness of IF steel disks. Microstructure investigation results can give a well support to verify the rules of hardness distribution, showing hardly no change of grains in center and sever plastic deformation in edge. The inhomogeneous distribution of stress and strain with the huge friction between anvil and disks in the process of HPT play an important role of hardness and microstructure distribution.
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