High cycle corrosion fatigue properties of 17-4PH stainless steel aged at different temperatures

doi:10.13251/j.issn.0254-6051.2021.04.034

Abstract

Abstract: 17-4PH stainless steel was treated with solid solution, stabilization and aging treatments, then the microstructure, hardness, crack growth rate, corrosion fatigue fracture and fatigue limit of the 17-4PH stainless steel aged at 568 ℃ and 605 ℃ respectively were analyzed. The results show that the fatigue limit of 17-4PH stainless aged at 568 ℃ is significantly higher than that aged at 605 ℃. For the specimen aged at 568 ℃, the fatigue growth rate is lower than that aged at 605 ℃, while the threshold of fatigue crack propagation is higher than the latter. The fatigue fractures of the tested steel after aging at 568 ℃ and 605 ℃ are both belonging to cleavage fracture.

Key words: 17-4PH stainless steel, high cycle corrosion fatigue, fatigue performance, crack propagation

CLC Number:

TG161

Gao Airui, Gao Yuan, Xi Shengqi, Shi Lianfeng, Liang Gang, Gao Zhenxu. High cycle corrosion fatigue properties of 17-4PH stainless steel aged at different temperatures[J]. Heat Treatment of Metals, 2021, 46(4): 187-191.

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