Abstract
The precipitation of a supersaturated 6061 Al alloy reinforced with 10% SiCpwas monitored by using a DSC technique. DSC thermal curves were used to predict peak-aging temperatures and durations. The activation energies for precipitation of the β″ phase were found to increase with elevation of the solution temperature from 510 to 600°C, and hence the peak-aging temperature and duration also increased. Microstructural examination revealed an increase in grain size when a high solution temperature was applied. To compare predicted peak-aging temperatures and durations, hardness measurements were carried out after artificial aging. The studies revealed that peak-aging hardening was obtained when the aging temperatures and durations corresponded to about 95% to 97% precipitation of β″ phase from conversion plots.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
D. Richard and P. N. Adler, Metall. Trans., 8A (1977) 1177.
P. N. Adler and D. Richard, Metall. Trans., 8A (1977) 1185.
J. M. Papazian, R. J. Deiasi and P. N. Adler, Metall. Trans., 11A (1980) 135.
J. M. Howe, Aluminium Alloys — their Physical and Mechanical Properties, Vol. 1, ed. E. A. Starke, Jr. and T. H. Sanders, Jr., Intern. Conf. at the Univ. of Virginia, Charlottesville, Virginia, 15–20 June 1986, Pbl. Eng. Mat. Advisory Services Lt., UK, p. 603.
C. Badini, F. Marino and E. Verne, Mat. Sci. Eng., 191A (1995) 185.
T. Das, S. Bandyopadhyay and S. Blairs, J. Mat. Sci., 29 (1994) 5680.
T. G. Nieh and R. F. Karlak, Scripta Metall., 18 (1984) 25.
J. W. Cahn, Acta Metall., 5 (1957) 169.
I. Dutta and D. L. Bourell, Mat. Sci. Eng., 112A (1989) 67.
I. C. Stone and P. Tsakiropoulos, Mat. Sci. Eng., 189 (1994) 285.
T. S. Kim, T. H. Kim, K. H. Oh and H. I. Lee, J. Mat. Sci., 27 (1992) 2599.
I. Dutta, S. M. Allen and J. L. Hafley, Metall. Trans. A, 22 (1991) 2553.
M. Gupta and M. K. Surappa, Key Eng. Mat., 104–107 (1995) 259.
M. P. Thomas and J. E. King, J. Mat. Sci., 29 (1994) 5272.
Annual Book of ASTM Standards, 14 (1984) 518.
H. E. Kissinger, Reaction Kinetics in Differential Thermal Analysis, Anal. Chem., 29 (1957) 1702.
S. Suresh, T. Christman and Y. Sufimura, Scripta Metall., 23 (1989) 1599.
W. F. Smith, Structure and Properties of Engineering Alloys, McGraw-Hill, Inc., 1993 p. 207.
Y. Li and X. An, Rare Metals, 13 (1994) 108.
J. M. Papazian, Metall. Trans., 12A (1981) 269.
C. Badini, F. Marino and A. Tomasi, J. Mat. Sci., 26 (1991) 6279.
T. G. Nieh and R. F. Karlak, Scripta Metall., 25 (1991) 1315.
C. Garcia, E. Louis, J. Narciso and A. Pamies, Mat. Sci. Eng., 189A (1994) 219.
I. F. Kolobnev, Heat Treatment of Aluminium Alloys, Israel Program for Scientific Translations, Jerusalem 1963.
K. R. Van Horn, Aluminium, Vol. 1, American Society for Metals, Metal Park, Ohio, Chapman & Hall, 1967, p. 109.
J. M. Papazian, Metall. Trans. A, 19 (1988) 2945.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Lu, L., Gupta, M. & Lai, M.O. Analysis of Precipitation Hardening of 6061/10% SiC Composite by Differential Scanning Calorimetry. Journal of Thermal Analysis and Calorimetry 54, 825–835 (1998). https://doi.org/10.1023/A:1010196005237
Issue Date:
DOI: https://doi.org/10.1023/A:1010196005237