因此，金属零件的疲劳断裂抗力（Fatigue Fracture Resistance, FFR），首先取决于表 面完整性(Surface Integrity, SI)。
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试验结果表明，表面完整性中的残余应力、 组织结构与表面粗糙度这三个因素对疲劳断裂抗力是最有影响力的三个因素。
The experiments have been shown that the three factors of residual stress microstructure as well as surface roughness including in the all factors of SI have most influence on the FFR.
材料的断裂韧性可充分满足焊缝细节疲劳抗力的发挥。
The material fracture toughness was adequate to ensure development of the full fatigue resistance of the weld detail.
本文简要介绍喷丸强化工艺的机理，及在改善金属零部件疲劳断裂和应力腐蚀断裂抗力中的强化效果；
The mechanism of the shat-blast enhancing technology and its eldest on improving resisfemle to fatigue and stress corrosion fracture are describe briefly in this paper.
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