The SAE 10W40 lubrication oil provided an inert environment to reduce the FCG rates for the given ductile irons as compared to atmospheric environment.

• 至于铸态与沃斯回火球墨铸铁在SAE 10W40润滑油环境下的疲劳裂缝成长行为，因该油体提供较惰性的环境降低腐蚀效应，使其裂缝成长速率比空气中慢。