부산대학교 도서관

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.msea.2006.04.044 Byline: D.R. Fang (a)(b), Z.F. Zhang (a), S.D. Wu (a), C.X. Huang (a), H. Zhang (a), N.Q. Zhao (b), J.J. Li (b) Keywords: Al-Cu alloys; Equal channel angular pressing (ECAP); Tensile strength; Elongation; Static toughness; Fracture modes Abstract: Tensile strength, elongation, static toughness and fracture modes of casting Al-0.63wt.% Cu and Al-3.9wt.% Cu alloys subjected to equal channel angular pressing (ECAP) were investigated. It is found that the grains of the two alloys can be refined to submicron level after four passes of ECAP. In addition, precipitation phase I[cedilla] along grain boundaries in the Al-3.9wt.% Cu alloy was also broken after ECAP treatment. The tensile fracture strength increases with increasing ECAP pass for both of the Al-Cu alloys, however, the elongation is almost independent of the ECAP pass. Consequently, the static toughness of the Al-Cu alloys is enhanced at high ECAP pass. The failure modes of Al-0.63wt.% Cu alloy consist of necking and shear fracture, however, Al-3.9wt.% Cu alloy displays normal fracture and shear fracture with different shear angle. Based on the results above, the tensile properties and failure modes of the Al-Cu alloys are discussed. Author Affiliation: (a) Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, People's Republic of China (b) School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin 300072, People's Republic of China Article History: Received 23 October 2005; Accepted 13 April 2006