二相ステンレス鋼の研削加工層における残留応力および変形挙動に関する X 線的研究

概要

論文の詳細を見る
Dual phase stainless steels consist of the ferrite and austenite phase and have high strength and corrosion-resistance. They are often used for offshore structures. Microscopic stress is generated because of the difference in mechanical properties of each individual phase. In this study, X-ray diffraction technique and the theories of micromechanics models were used. Distributions of macrostress, microstresses and plastic strain near ground surface were investigated. Specimens ground in the Up-cut and the Down-cut direction with various depths of cut were prepared. In the results, residual tensile stresses in the ferrite phase increase with the depth of cut. However, the stresses in the austenite phase were independent of depth of cut. Furthermore, change of phase stress during bending tests were evaluated; the difference between experimental and theoretical results increases when tensile stress increases. It was concluded that the misfit of plastic strain is an important factor for deformation behavior of dual phase stainless steel.
一般社団法人日本機械学会の論文
2001-11-25