Abstract
Double-age hardening characteristics of a Mg-6% Zn alloy reinforced with 20 vol % SiC particulates (SiCp) were examined. Tensile tests were conducted using specimens with two different double-ageing treatments. Examination of the fracture surface using scanning electron microscopy and energy dispersive analysis of X-rays, and study of the precipitation process using transmission electron microscopy were undertaken to supplement the mechanical test data. The results show pre-ageing below the Guinier-Preston zone solvus strengthens the matrix through refinement of precipitates, and in turn leads to an increase in strength and decrease in composite ductility. In addition, as the yield and ultimate tensile strength of the composite increase, involvement of SiCp in the fracture process increases.
Similar content being viewed by others
References
Proceedings of the 44th Annual World Magnesium Conference, Tokyo, Japan, 17–20 May 1987, International Magnesium Association McLean, VA, USA.
S. J. Swindlehurst andI. W. Hall, in “Proceedings of the International Symposium on Advances in Cast Reinforced Metal Composites”, edited by S. G. Fishman and A. K. Dhingra (ASM International, Metals Park, Ohio, 1988) p. 281.
B. A. Mikucki, S. C. Shook, W. E. Mercer II andW. G. Green,Light Metal Age 44 (1986) 16.
L. Sturkey andJ. B. Clark,J. Inst. Metals 88 (1959–60) 177.
J. B. Clark,Acta Metall. 13 (1965) 1281.
E. O. Hall,J. Inst. Metals 96 (1968) 21.
M. Bernole, J. Gallot andR. Graf,J. Microscopie 4 (1965) 787.
G. Mima andY. Tanaka,Nippon Kinzoku Gakkaishi 33 (1969) 796.
J. S. Chun, J. G. Byrne andA. Bornemann,Phil. Mag. 20 (1969) 291.
G. Mima andY. Tanaka,Nippon Kinzoku Gakkaishi 34 (1970) 209.
G. Mima andY. Tanaka,Trans. JIM 12 (1971) 323.
H. J. Rack, in “Powder Metallurgy Composites”, edited by P. Kumar, K. Vedula and A. Ritter (The Metallurgical Society, Warrendale, PA, 1988) p. 155.
H. J. Rack, in “Dispersion Strengthen Aluminium Alloys”, edited by Y.-W. Kim (The Metallurgical Society, Warrendale, PA, 1988) p. 649.
T. Christman andS. Suresh,Acta Metall. 36 (1988) 1691.
R. J. Arsenault andS. B. Wu,Scripta Metall. 22 (1988) 767.
J. M. Papazian,Met. Trans. 19A (1988) 2945.
H. J. Rack, in “Proceedings of ICCM-VI”, Vol. 2, edited by F. L. Mathews, N. C. R. Buskell, J. M. Hodgkinson and J. M. Morton (Elsevier Applied Science, London, 1987) p. 382.
S. Nutt andR. W. Carpenter,Mater. Sci. Engng 75 (1985) 169.
T. G. Neih andR. F. Karlak,Scripta Metall 18 (1984) 25.
H. J. Rack andP. K. Chaudhury, in “Light-Weight Alloys for Aerospace Applications”, edited by E. W. Lee, E. H. Chia and N. J. Kim (The Minerals, Metals and Materials Society, Warrendale, PA, 1989) p. 345.
“Metals Handbook” (ASM International, Metals Park, Ohio, 1979) p. 592, 9th Edn, Vol. 2.
T. G. Nieh, R. A. Rainen andD. J. Chellman, in “Proceedings of ICCM-V”, edited by W. C. Harrigan Jr, J. Strife and A. K. Dhingra (1985) p. 825.
C. R. Crowe, R. A. Gray andD. F. Hasson,ibid., p. 843.
D. McDanels,Met. Trans. 16A (1985) 1105.
J. K. Lee, D. M. Barnett andH. I. Aaronson,ibid. 8A (1977) 963.
P. E. Marth, H. I. Aaronson, G. W. Lorimer, T. L. Bartel andK. C. Russell,ibid. 7A (1976) 1519.
H. Loftler, I. Kovacs andJ. Lendvai,J. Mater. Sci. 18 (1983) 2215.
W. C. Harrigan Jr, in “Engineered Materials Handbook” (ASM International, Metals Park, Ohio, 1987) Vol. 1, p. 893.
J. W. Mullens andH. J. Rack, in “High Strength Powder Metallurgy Aluminium Alloys II”, edited by G. J. Hildeman and M. J. Koczak (AIME, Warrendale, PA, 1986) p. 155.
C. P. You, A. W. Thompson andI. M. Bernstien,Scripta Metall. 21 (1987) 181.
J. Shang andR. O. Ritchie,Mater. Sci. Engng 102 (1988) 181.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Chaudhury, P.K., Rack, H.J. & Mikucki, B.A. Effect of double-ageing on mechanical properties of Mg-6Zn reinforced with SiC particulates. J Mater Sci 26, 2343–2347 (1991). https://doi.org/10.1007/BF01130179
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01130179