Plastic flow behavior during the forging of a 6061 Al/10 vol pct Al 2 O 3 (p) composite
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. E.H. Jordan and B.I. Sandor: J. Testing Eval., 1978, vol. 6 (6), pp. 325-31. 12. Thermoelastic Stress Analysis, A. Harwood and W.M. Cummins, eds., Adam Hilger Pub., Bristol, United Kingdom, 1991. 13. P.K. Liaw, H. Wang, L. Jiang, B. Yang, J.Y. Huang, R.C. Kuo, and J.G. Huang: Scripta Mater., 1999, in press.
Plastic Flow Behavior during the Forging of a 6061 Al/10 Vol Pct Al2O3 (p) Composite M.S. YEH, W.P. WENG, S.C. WANG, and T.H. CHUANG Aluminum matrix composites possess excellent properties such as higher specific strength, wear resistance, higher stiffness, and low cost. The commercial products of Al-matrix composites have been widely used in automobiles, aircraft, and bicycles.[1] For the manufacturing of these components, casting has been the popular industrial process. Since forging has also been used in the forming of a variety of metals, its applicability to Al-matrix composites should be evaluated. Many researchers have studied the mechanical properties and fracture behavior of Al-matrix composites. Kamat et al.[2] have found that the Al2O3 particulate-reinforced aluminum-matrix composites had better mechanical properties (yield strength, ultimate tensile strength, and JIC ) than those of the unreinforced Al alloy. For the 6061-SiC composites, Lloyd[3] and Arsenault et al.[4] showed that the fracture of the composite initiated at the corners of SiC particles, where a high dislocation density that increased with tensile strain existed. Singh and Lewandowski[5] reported that the Poisson ratios of Al-matrix composites varied with heat treatment and reinforcement volume fractions, and specimens exhibited cracked reinforcements, which would influence the mechanical properties of Al-matrix composites. In another work,[6] they reported that the number of cracked reinforcements increased with an increase in the global stress and global plastic strain. Liu et al.[7,8] further investigated the effects of superimposed hydrostatic pressure on the deformation and fracture of Al-matrix composites. They showed that applying superimposed hydrostatic pressure, regardless of the matrix aging condition, could significantly increase the ductility of Al-matrix composites. It was also observed that the matrix metal could flow in between the separate faces of the cracked Al2O3 particles. However, these studies still focused on the tensile behavior of Al-matrix composites. On the other hand, the plastic deformation of these materials under compressive stress was seldom reported, except in the
M.S. YEH, Associate Professor, is with the Department of Mechanical Engineering, Chung-Hua University, Hsin-Chu, 300, Taiwan, Republic of China. W.P. WENG, Manager, is with the Department of Composites Materials, Loyalty Founder Enterprise Co., Ltd., Chung-Ho, 235, Taiwan, Republic of China. S.C. WANG, Associate Researcher, is with the Materials Research Laboratory, Industrial Technology Research Institute, Chutung, 310, Taiwan, Republic of China. T.H. CHUANG, Professor, is with the Institute of Materials Science and Engineering, National
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