Crack closure of base metal is caused by the residual plastic plastic deformation remaining in the wake of an advancing crack tip and is not as significant as in welded specimen.
而在管线钢基材中裂纹闭合现象较小，闭合原因是裂纹尖端尾部的残余塑性变形。
Crack closure of base metal is caused by the residual plastic plastic deformation remaining in the wake of an advancing crack tip and is not as significant as in welded specimen.
而在管线钢基材中裂纹闭合现象较小，闭合原因是裂纹尖端尾部的残余塑性变形。
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