The resuits show that metallurgical deject is the main reason leading to early formation of fatigue crack under normal working stress.
The resuits show that metallurgical deject is the main reason leading to early formation of fatigue crack under normal working stress.
认为，该曲轴材料的冶金缺陷是导致疲劳裂纹在正常工作应力下过早形成的原因。