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| STRESS CORROSION CRACKING BEHAVIOR AND TWO-STEP AGING OF HIGH STRENGTH Al-Cu-Mg-Si ALLOY |
| Chen Zailiang Qian Yourong Xing Shuyi (Beijing Institute of Aeronautics and Astronautics) Sun Chengqing Zhou Jingqi(Hongan Aircraft Company) |
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Abstract Stress corrosion cracking of high strength forged aluminium alloy LD10, containing 4.4％ Cu, 0.6％ Mg and 0.8％ Si, has been studied. It is found that the response of SCC resistance and strength to heat treatment of Al-Cu-Mg-Si alloy is different from that of Al-Zn-Mg-Cu alloy in some aspects. For Al-Zn-Mg-Cu alloys, a two-step aging improves the resistance against SCC, but always with decreased tensile strength. On the other hand, after two-step aging (1600℃×8h+190℃×2h) Al-Cu-Mg-Si alloy can reach a high resistance against SCC (K_(1SCC) is large than 17 MPam~(1/2) SCC growth rate is about 10~(-10)m/see) and a high tensile strength.Attention is fucused on the microstructure at grain boundaries because of the intergranular fracture characteristics of SCC. It is found SCC sensitivity on LD10 alloy varies with the precipitation phases: GP zone and θ″ phase are sensitive to SCC; the continuous θ′ phase is most sensitive to SCC; while the discontinuous stable θ phase is not sensitive to SCC at all.
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Received: 25 April 1988
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Cite this article:
Chen Zailiang Qian Yourong Xing Shuyi (Beijing Institute of Aeronautics and Astronautics) Sun Chengqing Zhou Jingqi(Hongan Aircraft Company). STRESS CORROSION CRACKING BEHAVIOR AND TWO-STEP AGING OF HIGH STRENGTH Al-Cu-Mg-Si ALLOY. J Chin Soc Corr Pro, 1988, 8(2): 135-140.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1988/V8/I2/135
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[1] Gruhl W., Metall., 19, 206 (1965)
[2] Speidel M. O., Hyatt M. V., Advance in Corrosion Science and Technology 2, (1972)
[3] Mostovoy S., et al., J. of Materials, 2, 661(1967)
[4] 陈再良,固体力学学报,2,239,(1983)
[5] 变形铝合金金相图谱,冶金工业出版社,(1973)
[6] Tunwin P. N., Lorimer G. W., Nicholson R. B., ACTA. Meta., 17, 1363 (1969)
[7] Deardo A. J., Town send R. D., Met. Trans. 1, 2573(1970) |
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