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1 不同实验条件下腐蚀疲劳裂纹扩展速率Paris公式及门槛值ΔKth

Table 1 Paris formula and threshold value ΔKth of corrosion fatigue crack growth rate under different test conditions

Environment R f / Hz T / ℃ V / L·min-1 C n ΔKth / MPa·m0.5 Seawater 0.1 5 23 0 4.712×10-10 3.733 9.15 Seawater 0.3 5 23 0 2.631×10-10 4.248 7.79 Seawater 0.5 5 23 0 1.690×10-10 4.538 6.07 Seawater 0.5 5 5 0 2.089×10-9 3.286 --- Seawater 0.5 5 10 0 1.618×10-9 3.405 --- Seawater 0.5 5 20 0 1.564×10-9 3.431 --- Seawater 0.5 5 30 0 2.877×10-9 3.247 --- Seawater 0.5 5 20 0 5.926×10-10 3.628 --- Seawater 0.5 5 20 0.3 2.111×10-9 3.288 --- Seawater 0.5 5 20 1 8.781×10-9 2.808 --- Seawater 0.5 5 20 3 6.722×10-9 2.949 --- Seawater 0.5 0.1 20 0 1.941×10-8 3.006 --- Seawater 0.5 1 20 0 1.573×10-8 2.839 --- Seawater 0.5 10 20 0 2.208×10-9 3.271 --- Air 0.5 0.1 20 0 4.629×10-9 3.000 --- Air 0.5 1 20 0 2.560×10-9 3.263 --- Air 0.5 10 20 0 4.945×10-9 3.068 ---