metallographic constituent assessment

• 金相分析

metallographic constituent assessment的用法和样例：

例句

1. Metallographic analyses show that the ultrasonic welding significantly refines the grains with more acicular ferrite appears in the fusion zone.
   金相分析表明，在电弧超声作用下，焊缝结晶组织明显细化，焊缝区针状铁索体增加。