オーステナイト系ステンレス鋼の塑性変形による微視的残留応力
Residual Microstress of Austenitic Stainless Steel by Plastic Deformation
著者:
鈴木 賢治 Kenji SUZUKI 菖蒲 敬久 Takahisa SHOBU
発刊日:
公開日:
Austenitic Stainless Steelcos2χ methodElastic AnisotropyPlastic DeformationResidual StressX-Ray Stress Measurement
概要
Austenitic stainless steel (SUS316L) was used as material of the specimen. Tensile deformation was applied to the plate specimen, the range of plastic strains was from 0% to 55%. The Vickers hardness of the specimens corresponded to the plastic strain. The residual macrostress was measured by Mn-Kα radiations. The residual macrostress of the annealed specimen had a small compression and changed into a tension after tensile plastic deformation. The specimen with 1% plastic strain showed the maximum tensile residual stress. To investigate the dependency of the residual stress on the diffraction plane, the residual microstresses for each diffraction plane were measured by hard synchrotron X-rays. The residual microstress arose from tensile plastic deformation, because the austenitic stainless steel has large elastic anisotropy as compared with other metals. The residual microstress can be related with the value of Young’s modulus which was calculated by Kroner model.
