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

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4 SD试样在不同R下的da / dN-ΔK关系

Fig.4 Relationships between da / dN and ΔK of SD specimens at different R