海洋工程结构用钢服役环境模拟及DH36钢腐蚀疲劳裂纹扩展性能研究

刘冬, 刘静, 黄峰, 杜丽影

Corrosion Fatigue Crack Propagation Performance of DH36 Steel in Simulated Service Conditions for Offshore Engineering Structures

LIU Dong, LIU Jing, HUANG Feng, DU Liying

表2 不同频率及ΔR下腐蚀环境相对空气环境下DH36钢疲劳裂纹扩展速率加速比例

Table 2 Relative acceleration ratio of DH36 steel of FCG rate and CFCG rate under different frequencies and ΔR=10, 15, 20, 25 MPa·m0.5

f / Hz FCG rate / 10-6 mm·cycle-1 CFCG rate / 10-6 mm·cycle-1 Relative acceleration ratio η / % 10 15 20 25 10 15 20 25 10 15 20 25 10 5.78 20.06 48.50 96.17 4.12 15.52 39.78 82.54 -28.74 -22.63 -17.98 -14.17 1 4.69 17.61 45.03 93.26 7.66 26.49 63.87 126.39 63.30 50.40 41.84 35.52 0.1 4.60 17.92 46.98 99.24 19.68 66.58 158.10 309.20 327.41 271.62 236.51 211.57