The Influence of Homogeneous Tension and Compression Loading on the Residual Stress State of Case-Hardened Steels
The Influence of Homogeneous Tension and Compression Loading on the Residual Stress State of Case-Hardened Steels
复制标题
均匀拉压载荷对表面硬化钢残余应力状态的影响
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
E. Macherauch
中科院分区：
文献类型：
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作者：
M. Bacher;D. Zhang;B. Scholtes;O. Vöhringer;E. Macherauch
淬火钢在压缩或拉伸载荷作用下的塑性变形主要发生在芯部。残余岩心应力状态对拉伸和压缩试验中的屈服点影响很大。由于平衡的原因，残余应力随硬化深度的变化，导致芯的残余应力增加，从而降低或提高各自拉伸或压缩载荷下的屈服点。这些残余应力的行为有助于表面硬化钢的应力差效应。表面硬化层仅在高变形值时影响加工硬化曲线。弹塑性拉伸或压缩加载过程中残余应力状态的变化明显是由于表面和核心区域的不均匀变形行为以及伴随的多轴载荷应力状态的结果。
The plastic deformation of case-hardened steels caused with either by compression or tensile loading chiefly occurs in the core. The residual core stress condition considerably influences the yield points in both tensile and compression tests. For reasons of equilibrium, the changes of the residual stresses according to the depth of case-hardening, lead to an increase of the core’s residual stress and thus decrease or increase the yield point under respective tensile or compression loading. The behaviour of these residual stresses contribute to the stress differential effect of case-hardened steels. The case-hardened surface layer only then influences the workhardening curves at high deformation values. The change of the residual stress state during elastic-plastic tensile or compression loading is clearly a result of the inhomogeneous deformation behaviour of the surface and core regions and the accompanying multi-axial load stress condition.