Has a certain toughness, can cover small cracks and resist the slight vibration.
具有一定的韧性，可以覆盖细小的裂缝及抵御轻微震动。
On cooling and contraction, the small cracks further expand into hot tearing defect.
铸件冷却收缩时，小的裂纹源进一步扩展形成裂纹缺陷。
In contrast with the threshold of fatigue cracks, a series of regulation of expanding of fatigue small cracks has been deduced.
采用对比分析方法，从疲劳裂纹的门槛值角度出发，归纳总结了疲劳裂纹的扩展规律。
In the tests, competition of the MSD is observed, and group-occurring small cracks are also proved to be an important kind of failure mode.
在试验中观察到了MSD的竞争现象，证实了群发小裂纹也是MSD中一种重要的破坏形式。
In the tests, competition of the MSD is observed, and group-occurring small cracks are also proved to be an important kind of failure mode.
在试验中观察到了MSD的竞争现象，证实了群发小裂纹也是MSD中一种重要的破坏形式。
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