The grains are elongated along deformation lines and small precipitations occur in grain boundary of the TMAZ.
热机影响区晶粒沿流线方向拉长且有细小沉淀相在晶界上析出；
The hardness of weld region shows'less variation than base metal and the ultimate tensile strength of TMAZ is almost 20% improvement.
焊缝区的硬度值波动范围很小，抗拉强度比母材增加约20％。
The hardness of weld region shows'less variation than base metal and the ultimate tensile strength of TMAZ is almost 20% improvement.
焊缝区的硬度值波动范围很小，抗拉强度比母材增加约20％。
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