SCC (Stress Corrosion Cracking) Behaviors of Mg-7Al Alloy

Abstract:

Stress corrosion cracking (SCC) behaviors of Mg-7Al-0.3Mn alloy in 0.21M K2CrO4+0.6M NaCl solution and in air were studied using slow strain rate test (SSRT). The effect of electrode potential on SCC behaviors of the alloy was investigated in 0.21M K2CrO4+0.6M NaCl solution during SSRT. The fractographs of the alloy tested in air and in the solution were observed. These results indicated that SCC of the alloy was related to the hydrogen embrittlement and pitting corrosion. The pitting corrosion was the cause of crack initiation, and the hydrogen embrittlement leaded to crack propagation.

• Periodical: Materials Science Forum (Volume 650)
• Pages: 272-278
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.650.272
• Online since: May 2010
• Authors: Ya Zhang, Xue Hua Zhou, Zhong Ling Wei, Yuan Wei Huang
• Keywords: Hydrogen Embrittlement, Pitting Corrosion, Slow Strain Rate Test, Stress Corrosion Cracking (SCC)

References

[1] R. E. Brown: Light Metal Age, Vol. 55(7-8) (1997), P. 72.

[2] F. H. Froes, D. Eliezer and E. Aghion: JOM, Vol. 50(1998), P. 30-34.

[3] S. Schumam, Volkswagen AG. Group Research: Matrials Science Forum, Vols. 488-489 (June 2005) P. 1-8.

[4] E.F. Emley, Principles of Magnesium Technology, Pergamon Press, 1996, P720-721.

[5] I.J. Polmear, Light alloys: Metallurgy of the Light Metals, American Society for Metals, 1981, pp.154-159.

[6] B. L. Mordike, T. Ebert, Mater. Sci. Eng. A. 302 (2001)37-45.

[7] G. L. Song, A. Atrens, Adv. Eng. Mater. 5(2003) 837-858.

[8] R. H. Jones, M. J. Danielson and R. H. Baer, J. Mater. Energy Sys, Vol 8, 1986, P. 185.

[9] G. L. Song, A. Atrens, Adv. Eng. Mater. 1(1999) 11-33.

[10] G. Siebel, Tahrbuch der deutschen Luftfahrtforschung, Part 1, 1937, 528-531.

[11] A. Atrens, Z.F. Wang, Materials Forum, 19 (1995) 9-34.

[12] W. Dietzel, Encyclopedia of Materials: Science and Technology, K. H. J. Buschow, R. W. Cahn, M. C. Flemings, B. Ilschner, E. J. Kramer & S. Mahajan (Eds. ), Elsevier Science Ltd., Amsterdam, (2001) 8883-8886.

DOI: 10.1016/b0-08-043152-6/01863-5

[13] R.H. Jones, R.E. Ricker, Stress Corrosion Cracking: Materials Performance and Evaluation, ASM International, USA, (1992) 1.

[14] A.J. Bursle, E.N. Pugh, Mechanisms of Environment Sensitive Cracking of Materials, ed P.R. Swann, F.P. Ford and A.R.C. Westwood, Materials Society (London), (1977) 471-481.

[15] W.S. Loose, H.A. Barbian, Symposium on Stress Corrosion Cracking of Metals, American Society for Testing Materials, USA, (1945) 273-292.

DOI: 10.1520/stp42579s

[16] W.K. Miller, Stress Corrosion Cracking: Materials Performance and Evaluation, ed R.H. Jones, ASM International, USA, (1992) 251.

[17] G Song and A Atrens, Advanced Engineering Materials 1 (1999) 11-33.