铁素体-贝氏体双相钢韧性断裂过程中的夹杂物临界尺寸及孔洞生长

赵亚峰, 刘苏杰, 陈云, 马会, 马广财, 郭翼

Critical Inclusion Size and Void Growth in Dual-Phase Ferrite-Bainite Steel During Ductile Fracture

ZHAO Yafeng, LIU Sujie, CHEN Yun, MA Hui, MA Guangcai, GUO Yi

图1 拉伸应力达到极限抗拉强度(UTS)后在不同工程应变(ε)水平下和断裂后的XCT二维切片图和单向拉伸应力-应变曲线

Fig.1 2D slice images of time-lap CT scans at different strain (ε) levels post ultimate tensile strength (UTS) (a-h) and stress-strain curve (i) (The rate of void nucleation increases rapidly between nominal strain of 0.05 and 0.053, which quickly coalesced and led to fracture) Color online (a) ε = 0.038 (b) ε = 0.047 (c) ε = 0.049 (d) ε = 0.05 (e) ε = 0.053 (f) fracture (g) slice at the fracture surface before fracture in Fig.1e (h) slice at the region of interest shown in Fig.1e