熔区 meaning in English

molten zone

When the reliability is 99 % , the fatigue life of laser cladding specimens is about 27 % than that of substrate material specimens
其主要影响因素有，熔覆层底部的枝晶、重熔区内的缺陷和熔覆层内的拉应力。
It has been found that the temperature gradient ahead of the solid / liquid interface is almost linearly increased with the increasing of withdrawing rate
实验发现，熔区内固液界面前沿的温度梯度随着区熔速率( r )的增加呈线性增加。