CORROSION FATIGUE BEHMIOUR OF A HIGH STRENGTH STEEL FOR OIL-DRAWING STICKS

J Chin Soc Corr Pro

1995, Vol. 15

Issue (3): 196-202 DOI:

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CORROSION FATIGUE BEHMIOUR OF A HIGH STRENGTH STEEL FOR OIL-DRAWING STICKS

Li Mingqi;Meng Fanzong(Lunzhou University)Sui Xianzeng;Zhou Xiang(Xining Steel Works)

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Abstract Fatigue craCk.growth rates (FCGR)of tempered and normalized specimen of high strength steel38MnCrNiMo exposed to air,distilled water and 3.5%NaCl solution were evaluated. The effects of appliedpolarization potentials on FCGR in 3.5%NaCl solution were examined. The corrosion fatigUe fracturesurfaCe features and metallographic microstructure were also observed. The results indicated that thefatigue crack growth for the steel was controlled by hydrogen embrittlement(HE)and the FCGR oftempered specimens was lower than that of normalized specimens in air,distilled water and 3.5% NaCI' solution. The HE sensitivity of fatigue crack growth for the sted in corrosive environments was aLsodiscussed.

Key words: Corrosion fatigue Fatigue crack growth rate Hydrogen embrittlement Polarization potential

Received: 25 June 1995

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Li Mingqi;Meng Fanzong(Lunzhou University)Sui Xianzeng;Zhou Xiang(Xining Steel Works). CORROSION FATIGUE BEHMIOUR OF A HIGH STRENGTH STEEL FOR OIL-DRAWING STICKS. J Chin Soc Corr Pro, 1995, 15(3): 196-202.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1995/V15/I3/196

1LiMingqi,WeiZhenwei,ZhangFusheng,TangJieqing．Corros．Sci．,1993,34(9):1403-14102李明奇,冯博学．理化检验(物理分册),1986,22(4):31-333李明奇,冯博学,魏振伟．中国腐蚀与防护学报,1987,7(4):2574BrownBF,etal．J,Electrochem．Soc,1969,116(2):2185褚武扬．断裂力学基础,北京:科学出版社,1979,p．386李明奇,张福生,魏振伟,潘水才．兰州大学学报(自然科学版),1993,29(2):43-467李明奇,冯博学,童志深．兰州大学学报(自然科学版),1986,22(3):42-48

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