However, the creep fracture of medium strength match joint, located in the low strength base metal remote from the weld interface, showed a ductile fracture character.
中强匹配接头蠕变断裂位置在远离焊缝界面的低强度母材区，呈延性断裂性质。
The results show that the defects in the weld such as interface reactant and pore are the key factors to reduce the material weldability.
研究发现，焊缝中存在的界面反应物、气孔缺陷，是导致该种材料焊接性显著降低的主要因素。
Then use the coil ring machine rolled into a circle, with the electrode to weld the interface firmly, welding mouth to carry out X spectroscopy.
然后用卷环机卷制成圆圈，用焊条把接口处焊接牢固，焊口处要进行X光谱检验。
Moreover, the difference of J-integral values increases with the increasing of the load and strength mismatching difference and the path-enclosed length of interface between weld metal and base metal.
载荷越大，焊缝与母材的强度差别越大；积分路径中包含的焊缝与母材界面长度越大，J积分的差值越大。
If the surface of the stir pin is smooth, the migration of interface in the thickness direction reduces, but the interface spreading to the weld is serious.
若搅拌针表面是光滑的，搭接界面在厚度方向上的迁移减小，但返回边界面向焊缝中心延伸的程度增大。
If the surface of the stir pin is smooth, the migration of interface in the thickness direction reduces, but the interface spreading to the weld is serious.
若搅拌针表面是光滑的，搭接界面在厚度方向上的迁移减小，但返回边界面向焊缝中心延伸的程度增大。
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