静水压力对铸造与锻造Ti-6Al-4V合金应力腐蚀的影响差异研究

徐秋发, 郭岳, 刘骏, 杨东, 崔宇

Effect of Hydrostatic Pressure on Stress Corrosion Cracking of Cast and Forged Ti-6Al-4V Alloys

XU Qiufa, GUO Yue, LIU Jun, YANG Dong, CUI Yu

表2 U弯锻态Ti-6Al-4V合金试样在不同静水压力下的EIS的拟合结果

Table 2 Fitting results of EIS of U-bend forged Ti-6Al-4V alloy samples under different hydrostatic pressures

Pressure / MPa t / min Rs / Ω·cm2 Ceff, dl / μF·cm-2 ndl Rct / Ω·cm2 Ceff, f / μF·cm-2 nf Rf / Ω·cm2 Σχ2 0.1 5 2.94 11.7 0.92 3320 30.4 0.96 6.85 × 105 3.74 × 10 -3 25 2.85 34.9 0.91 2654 20.7 0.93 9.18 × 105 7.13 × 10 -3 45 2.12 11.3 0.92 3055 11.7 0.92 9.78 × 105 2.35 × 10 -3 65 2.11 11.3 0.92 3824 9.7 0.92 1.03 × 106 2.23 × 10 -3 85 2.86 8.3 0.92 6302 49.3 0.95 1.15 × 106 2.32 × 10 -3 20 5 1.34 23.3 0.87 2227 37.8 0.70 6.88 × 104 6.30 × 10 -3 25 1.35 18.8 0.89 1813 49.6 0.76 1.05 × 105 1.50 × 10 -3 45 1.38 14.4 0.91 1485 71.6 0.79 1.18 × 105 1.63 × 10 -3 65 1.36 16.4 0.90 2457 60.9 0.78 1.49 × 105 3.87 × 10 -3 85 1.36 16.0 0.90 2523 74.1 0.80 2.05 × 105 1.49 × 10 -3