高强钢焊缝金属强韧性研究进展

曹睿, 刘梓申

Research Progress on the Strength and Toughness of High-Strength Steel Weld Metal

CAO Rui, LIU Zishen

图1 典型韧脆转变曲线、载荷-位移曲线和断口形貌

Fig.1 Typical ductile-brittle transition curve (a), load-displacement curves (b-e), and fracture morphology (f) (b-e) load-displacement curves and fracture morphology schematics (insets) at different ductile-brittle transition stages of upper shelf (b), transition regions (c, d), and lower shelf (e) (Orange lines in Figs.1c-e show the instan-taneous brittle cleavage fracture) (f) fracture morphology showing the stretch zone width (SZW), stable-plastic crack length (SCL), and the cleavage fracture distance (Xf) from cleavage fracture initiation origins to the blunted crack tip