X線による金属材料の残留応力に関する研究 : 炭素鋼の一軸および多軸応力による残留応力について

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It is pointed out by the authors as the result of studies on the residual stresses of stretched and quenched carbon steel specimens by using X-ray method : 1) that thermal residual stress in the (211) crystal plane represents the macroscopic residual stress itself, 2) that it is considered that the compressive residual stress obtained by using the Cr-Ka beams in stretched carbon steel specimen includes the macroscopic residual stress due to the surface effect, and also the microscopic one due to the anisotropy of plastic deformation. It has been reported by many researchers that X-ray compressive residual stresses are observed on the plastically stretched carbon steel specimens. However, considering from the recently obtained experimental results, some contradictions to the discussions are often found since the past studied treated only the residual stress due to the uniaxial stretching, and scarcely dealt with the residual stresses caused by other processes. For this reason, the authors carried out experiments to examine the nature of X-ray residual stress in order to extend the method of X-ray stress measurement to practical use. The crystal plane dependence of residual stress in stretched or quenched specimen was investigated, and the biaxial residual pressure were measured. Iron and five sorts of carbon steels with carbon contents ranging between 0.06 and 1.10 percent were prepared as test materials. All the specimens were annealed after machining. Some of them were water-quenched from 600℃ after being annealed, and these specimens include the residual stresses of purely thermal effect. The X-ray diffraction apparatus used was a parallel beam type X-ray stress analyser, and the diffraction lines of Co-Ka and Cr-Ka beams from (310) and (211) crystal planes, respectively, were automatically recorded.
社団法人日本材料学会の論文
1964-12-15

X線による金属材料の残留応力に関する研究 : 炭素鋼の一軸および多軸応力による残留応力について

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