在性能方面，强度被显著地提高，机械疲劳性能变化不明显，冲击韧性和塑性降低。
On mechanical properties, the strength was raised obviously, fatigue property was unchanged, impact toughness and ductility were reduced.
使用超声波冲击焊趾来提高焊接接头及结构的疲劳强度，是国际上刚刚出现的一种新方法。
It is a new method to increasing fatigue strength of welded joints and structure by peening welded toes with ultrasonic peening equipment.
使用超声波冲击焊趾来提高焊接接头及结构的疲劳强度，是一种国际上刚刚出现的新方法。
It's a new method to increase fatigue strength of welded joints and structure by peening toe of weld with ultrasonic peening equipment.
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