Relationship Analysis of Homogeneity of Crack Arrest Property and Tensile Property

Homogeneity relationship of test data of crack arrest toughness K_{ca (-10℃)} and tensile mechanical property of high strength plates of thirty-three groups was analyzed. The results show that arrest toughness decreases with the increasing of variable coefficient of yield strength along the thickness direction; that the relationship formula of K_{ca (-10℃)} and CV_Rp0.2is proposed based on above results:K_{ca (-10℃)}=-7.1·R_p0.2·ln (CV_Rp0.2)-2.85×10^-10·R_p0.2·T₀²·t².