When cooling, the residual tensile stress in the Y direction in the middle of blade increased.
冷却时在叶片的中部y方向残余拉应力有较大增加。
In the multilayer welding process, the method of symmetry welding gets the minimum residual tensile stress.
在多层焊的过程中，采用对称施焊的方法得到的焊接残余拉应力峰值是最小的。
The presence of the greater residual tensile stress induces the stress corrosion cracking in the course of the acid pickling.
其原因是磁屏表面存在较大的切向拉应力，从而在酸洗过程中产生了应力腐蚀开裂。
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