Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)
- 2000.04a
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- Pages.112-118
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- 2000
A Densification Model for Mixed Metal Powder under Cold Coompaction
냉간압축하에서 혼합금속분말의 치밀화 모델
Abstract
Densification behavior of mixed copper and tool steel powder under cold compaction was investigated. By mixing the yield functions proposed by Fleck et al. and by Gurson for pure powder in terms of volume fractions and contact numbers of Cu powder new mixed yield functions were employed for densification of powder composites under cold compaction. The constitutive equations were implemented into a finite element program (ABAQUS) to compare with experimental data for densificatiojn of mixed powder under cold isostatic pressing and cold die compaction. finite element calculations by using the yield functions mixed by contact numbers of Cu powder agreed better with experimental data than those by volume fractions of Cu powder.
Keywords
- Densification;
- Cold Isostatic Pressing;
- Cold Die Compaction;
- Yield Function;
- Constitutive Equation;
- Finite Element Analysis;
- Mixed Metal Powder