440 MPa级高强钢焊缝金属的断裂韧性

曾道平, 安同邦, 郑韶先, 代海洋, 曹志龙, 马成勇

Fracture Toughness of Weld Metal of 440 MPa Grade High-strength Steel

ZENG Daoping, AN Tongbang, ZHENG Shaoxian, DAI Haiyang, CAO Zhilong, MA Chengyong

图11 CTOD试样断口的形貌

Fig.11 Fracture morphology of CTOD sample (a) micromorphology, (b) prefabricated fatigue crack zone, (c) fatigue crack growth zone, (d) secondary fatigue crack zone, (e) impact fracture zone