Effect of Hot Extrusion on Microstructure and Mechanical Properties of P/M Al/SiC_p Composite

Abstract:

Distribution of SiC particles in powder metallurgy (P/M) Al/SiCp composite during hot extrusion were investigated in this paper. It has been shown that a homogenous distribution of SiC particles in as-extruded rods has been achieved. There was an order and directional distribution of SiC in the longitudinal direction, which was related to the stress state associated with hot extrusion. With a small extrusion ratio (11), many obvious interfaces among the powders remained existent since the extrusion stress was not large enough to achieve a metallurgical bond. The interfacial bonding strength of the composite can be enhanced with a higher extrusion ratio, and metallurgical interfaces were achieved with the extrusion ratio of 17. Ambient tensile tests demonstrate that the mechanical properties change along with the extrusion ratio’s increasing.

• Periodical: Applied Mechanics and Materials (Volume 281)
• Pages: 453-456
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.281.453
• Online since: January 2013
• Authors: You Ping Sun, De Jian Zhou, Wu Bin Xu, Guang Lin Shi, Wei Li
• Keywords: Aluminum Matrix Composite (AMC), Extrusion, Mechanical Property, Microstructure, Powder Metallurgy (P/M)

References

[1] B. Mubaraki, S. Bandyopandhyay, R. Fowle, et al. Drilling studies of an Al2O3-Al metal matrix composite, Journal of Materials Science, 1995, 30(24): 6273-6280.

DOI: 10.1007/bf00369677

[2] L. A. Dobrza´nski, A. Włodarczyk, M. Adamiak. Structure properties and corrosion resistance of PM composite materials based on EN AW-2124 aluminium alloy reinforced with the Al2O3 ceramic principles, Journal of Materials Processing Technology, 2005, 162–165 (5): 27–33.

DOI: 10.1016/j.jmatprotec.2005.02.006

[3] B. Torres, H. Lieblich, J. Ibanez, et al. Mechanical properties of some PM aluminide and silicide reinforced 2124 aluminium matrix composites, Scripta Materialia, 2002, 47(1): 45-49.

DOI: 10.1016/s1359-6462(02)00095-7

[4] L. A. Dobrzański, A. Włodarczyk, M. Adamiak. The structure and properties of PM composite materials based on EN AW-2124 aluminum alloy reinforced with the BN or Al2O3 ceramic particles, Journal of Materials Processing Technology, 2006, 175(1-3): 186-191.

DOI: 10.1016/j.jmatprotec.2005.04.031

[5] J. W. Yeh, S. Y. Yuan, C. H. Peng, A reciprocating extrusion process for producing hypereutectic Al-20 wt. % Si wrought alloys, Materials Science and Engineering A, 1998, 252(2): 212-221.

DOI: 10.1016/s0921-5093(98)00677-7

[6] M.T. Kiser, F.W. Zok, D.S. Wilkinson. Plastic flow and fracture of a particulate metal matrix composite, Acta Materialia, 1996, 44 (9): 3465–3476.

DOI: 10.1016/1359-6454(96)00028-6

[7] L.M. Tham, M. Gupta, L. Cheng, Effect of reinforcement volume fraction on the evolution of reinforcement size during the extrusion of Al-SiC composites, Materials Science and Engineering A, 2002, 326 (2): 355–363.

DOI: 10.1016/s0921-5093(01)01526-x

[8] D. Zhao, F.R. Tuler, D.J. Lloyd. Fracture at elevated temperatures in a particle reinforced composite, Acta Metallurgica et Materialia, 1994, 42 (7): 2525–2533.

DOI: 10.1016/0956-7151(94)90333-6

[9] W. L. Zhang, M. Y. Gu, D. Z. Wang, et al. Influence of deformation temperature on matrix metal flow and whisker re-orientation in SiCw/6061A1 composites during compressive deformation. Journal of Materials Engineering, 2002, 11: 3-6.

DOI: 10.1179/026708301773002581