Cyclic tension-compression loading of ductile cast irons

球状黒鉛鋳鉄の繰返し引張圧縮変形

Harjo, S.   ; 窪田 哲*; 友田 陽; 相澤 一也  

Harjo, S.; Kubota, Satoru*; Tomota, Yo; Aizawa, Kazuya

Ductile cast irons (FDC steels) are often used for casing components of hydraulic system of construction machines. The strengthening mechanism in an FDC steel during cyclic tension-compression deformation at RT were measured by understanding load sharing among the constituent phases (ferrite, cementite and graphite). The in situ neutron diffraction during cyclic loading was performed in a continuous manner up to 1% with a constant strain rate. Phase strains were evaluated and the responces during deformation are discussed.