Densification simulation of compacted Al powders using multi-particle finite element method  

作　　者：Kyung-Hun LEE Jung-Min LEE Byung-Min KIM 

机构地区：[1]School of Mechanical Engineering,Pu san National University

出　　处：《中国有色金属学会会刊：英文版》2009年第B09期68-75,共8页Transactions of Nonferrous Metals Society of China

基　　金：supported by a grant-in-aid for the National Core Research Center Program from the Ministry of Education Science & Technology,Korea;the Korea Science & Engineering Foundation (No.R15-2006-022-03003-0)

摘　　要：The powder compaction simulations were performed to demonstrate deformation behavior of particles and estimate the effect of different punch speeds and particle diameters on the relative density of powder by a multi-particle finite element model(MPFEM). Individual particle discretized with a finite element mesh allows for a full description of the contact mechanics. In order to verify the reliability of compaction simulation by MPFEM, the compaction tests of porous aluminum with average particle size of 20 μm and 3 μm were performed at different ram speeds of 5, 15, 30 and 60 mm/min by MTS servo-hydraulic tester. The results show that the slow ram speed is of great advantage for powder densification in low compaction force due to sufficient particle rearrangement and compaction force increases with decrease in average particle size of aluminum.The powder compaction simulations were performed to demonstrate deformation behavior of particles and estimate the effect of different punch speeds and particle diameters on the relative density of powder by a multi-particle finite element model（MPFEM）. Individual particle discretized with a finite element mesh allows for a full description of the contact mechanics. In order to verify the reliability of compaction simulation by MPFEM, the compaction tests of porous aluminum with average particle size of 20 pm and 3 pm were performed at different ram speeds of 5, 15, 30 and 60 mm/min by MTS servo-hydraulic tester. The results show that the slow ram speed is of great advantage for powder densification in low compaction force due to sufficient particle rearrangement and compaction force increases with decrease in average particle size of aluminum.

关 键 词：粉末压实 粉末粒子 多孔铝 有限元法 模拟 致密化 平均粒径 有限元模型 

分 类 号：TB383.3[一般工业技术—材料科学与工程]