应力比对含缺陷选区激光熔化TC4合金稳态疲劳裂纹扩展速率的影响
Effects of Stress Ratio on the Fatigue Crack Growth Rate Under Steady State of Selective Laser Melted TC4 Alloy with Defects
应力比对含缺陷选区激光熔化TC4合金稳态疲劳裂纹扩展速率的影响 |
| 戚钊, 王斌, 张鹏, 刘睿, 张振军, 张哲峰 |
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Effects of Stress Ratio on the Fatigue Crack Growth Rate Under Steady State of Selective Laser Melted TC4 Alloy with Defects |
| QI Zhao, WANG Bin, ZHANG Peng, LIU Rui, ZHANG Zhenjun, ZHANG Zhefeng |
| 图3 SD (激光功率300 W、扫描速率1200 mm/s)和LD (激光功率250 W、扫描速率1400 mm/s)试样在应力比R = 0.1时的疲劳裂纹扩展速率(da / dN)-应力强度因子范围(ΔK)关系 |
| Fig.3 Relationships between da / dN and ΔK of LD and SD specimens at R = 0.1 (R—stress ratio; a—crack length; N—number of cycle; da / dN—fatigue crack growth rate; ΔK—stress intensity factor range; 1, 2, 3—specimen numbers) |
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