Numerical Simulation of Pore Evolution of 7050 Aluminum Alloy during Hot Compression Process

Abstract:

Evolution behavior of pores in 7050 aluminum alloy during hot compression process has been investigated by finite element (FE) numerical simulation. The representative volume element (RVE) model containing one isolated pore is built, in which the gas in pore is treated as ideal gas. Effects of initial pore inner pressure and deformation temperature on pore evolution have been investigated. The simulation results indicate that stress concentration exists around the pore in the compressing process. At the simple compression condition, the inner pressure of the pore increases but the volume decreases as the bulk metals deforms. However, the volume reaches a plateau after the yield point of bulk metal. The plateau volume depends on the initial inner pressure of the pore and the flow stress of the bulk metal. Since the inner pressure of the pore balances with the flow stress of bulk metal at the interface, the temperature affects the evolution behavior of the pore through its influence on the flow stress of the bulk metal primarily.

• Periodical: Materials Science Forum (Volume 879)
• Pages: 2119-2124
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.879.2119
• Online since: November 2016
• Authors: Yong Fu Wu, Hui Xue Jiang, Chun Zou, Kang Cai Yu, Hiromi Nagaumi*
• Keywords: Aluminum Alloy, Deformation, Hot Compression, Pore

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