N the metal of components that are being welded by a molten filler metal 基体金属 [engineering]
Results indicate that the fatigue strength of welded joints is lower than that of the parent metal.
结果表明：焊接接头高周疲劳性能低于母材的疲劳性能。
The tensile strength and the elongation percentage of the parent metal and the weld zone increased slightly.
冲击处理使焊缝区和母材区的强度和伸长率均有所增加。
Metallurgical tests of cross-sectional weld samples indicate a minimal heat-affected zone that is identical to the parent metal.
剖焊样品的金相检验表明，成品的最小热影响区与母体金属完全相同。
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