The distances from the failure planes of a HAZ ( heat affected zone ) to the center and the toe of the weld , and the extensions of a HAZ and a RSZ ( reduced strength zone ) are measured .
通过试验得出对接焊缝临界失效面距焊缝中心及焊缝边缘的距离、焊接热影响区及折算强度区的范围；
rsz