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| EFFECT OF STRENGTH ON CORROSION FATIGUE BEHAVIOUR OF LOW ALLOY STEELS IN ARTIFICIAL SEAWATER |
| by ZHENG Wenlong; ZHU Guopei (Shanghai Institute of Materials Research); OUYANG Huaijin; LI Ge (Shanghhai Baoshan Iron and Steel Works) |
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Cite this article:
by ZHENG Wenlong; ZHU Guopei (Shanghai Institute of Materials Research); OUYANG Huaijin; LI Ge (Shanghhai Baoshan Iron and Steel Works). EFFECT OF STRENGTH ON CORROSION FATIGUE BEHAVIOUR OF LOW ALLOY STEELS IN ARTIFICIAL SEAWATER. Acta Metall Sin, 1986, 22(3): 95-102.
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Abstract The corrosion fatigue (CF) and stress corrosion cracking (SCC)behaviour of steels 34CrNi3Mo and 40CrNiMo with different strength grades dealt with various tempering treatments has been investigated in artificial seawater using the fracture mechanics and electrochemical methods. Experimental results showed that the SCC susceptibility of the steel in seawater is increased and the CF crack propagation rate, da/dN, is sharply raised with the increase of its YS. For the steels of YS over 890 MPa, tempered less than 650℃, the da/dN vs △K plot appeared a plateau, in which the(dN/da)_(11) kept almost constant and its fracture surface was similar in shape to that of SCC. It is believed that the CF behaviour is close related to the SCC and the SCC Susceptibility of the steel is promoted under the CF condition.
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Received: 18 March 1986
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1 ASTM D1141, (1980) .
2 Engell, H.J,; Baeumel, A., Physical Metallurgy of Stress Corrosion Fracture, Ed. Rhodin, T. N., Interscience, New York, London, 1959, p. 341．
3 郑文龙;翁端荣;王敏,理化检验,物理分册,19(1983) ,№3,18． |
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