【摘要】 本文通过标准 COD 试验,研究了 B 30+QT 钢复合材料的焊接接头中裂纹不同取向时的断裂行为。提出了界面附近的“裂纹尖端塑性区畸变”模型。利用扫描电镜研究,得出结论:复合界面处的剪切破坏是“裂纹抑制”作用的重要原因之一。更多还原

【Abstract】 By means of the standard COD test,the fracture behaviour of B30+QT steel clad plate specimens with various crack orientations are studied.A“crack-tip plastic- zone abnormal development”model is proposed.By SEM fractography,it is concluded that one of the important causes of“cracking-arrest action”is"shearing of metal at the claded interface”.更多还原