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7 SD和LD试样在R = 0.1和ΔK = 16 MPa·m1/2条件下疲劳断口的SEM像
Fig.7 SEM images of fractographies of SD (a) and LD (b) specimens at R = 0.1 and ΔK = 16 MPa·m1/2