Finite element simulation of powder compaction via shock consolidation using gas-gun system

被引：4

作者：

Kim, Wooyeol ^{[1
]}

Ahn, Dong-Hyun ^{[1
]}

Park, Lee Ju ^{[2
]}

Kim, Hyoung Seop ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol POSTECH, Dept Mat Sci & Engn, Pohang, South Korea

[2] ADD, Taejon 305152, South Korea

来源：

11TH INTERNATIONAL CONFERENCE ON TECHNOLOGY OF PLASTICITY, ICTP 2014 | 2014年 / 81卷

关键词：

Finite element method (FEM); Shock consolidation; Nanocrystalline; Spall;

D O I：

10.1016/j.proeng.2014.10.094

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Shock consolidation is a promising method for consolidation of nanocrystalline metallic powders since it can prevent grain growth of nanopowders during the process due to very short processing time. However, internal cracks often occurs in powder compacts during the shock consolidation process. In this paper, finite element simulations showed that reflected tensile wave causes spall phenomena resulting internal crack of powder compaction during shock compaction process. To reduce spall phenomena, FEM simulation with changing compaction die's geometry was performed to find out relationship between shape and tensile wave intensity. Based on FEM results, new compaction die was designed and bulk nanocrystalline Cu are obtained using new compaction die. (C) 2014 Published by Elsevier Ltd.

引用

页码：1180 / 1185

页数：6

共 8 条

[1]

[Anonymous], 1994, Dynamic Behavior of Materials, P66

[2] A GAS-GUN FACILITY FOR MATERIAL IMPACT STUDIES USING LOW-VELOCITY, LOW-MASS PROJECTILES [J].