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		含缺陷的Al-Si-Mg合金的疲劳性能和强度评估
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			Fatigue Properties and Strength Assessment for Al-Si-Mg Alloy via Test Samples with Artificial Defects
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| 图5. 370 μm钻孔试样的裂纹源对比 | 
| Fig.5. Comparison of crack source of 370 μm drilled specimen: (a) artificial defect crack source; (b) section crack source | 
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