Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)
- Volume 32 Issue 4
- /
- Pages.333-339
- /
- 2008
- /
- 1226-4873(pISSN)
- /
- 2288-5226(eISSN)
DOI QR Code
The Effect of an Aluminum Mold on Densification of Copper Powder Under Warm Pressing
온간금형 압축시 구리 분말의 치밀화에 대한 알루미늄 몰드의 영향
- Published : 2008.04.01
Abstract
Densification behavior of copper powder was investigated to study the effect of an aluminum mold under warm pressing. The low flow stress of an aluminum mold is appropriate to apply hydrostatic stress to powder compacts during compaction under high temperature. The suggested powder metallurgy process is very useful under high temperature since copper powder compacts have higher relative density over axial stress of 100 MPa and show more homogeneity as compared with conventional warm pressing. Elastoplastic constitutive equation proposed by Shima and Oyane was implemented into a finite element program (ABAQUS) for densification behavior under warn pressing by using a metal mold. Finite element results agreed well with experimental data for densification and deformation of copper powder compacts in the mold.
Keywords
Aluminum Mold;Densification;Finite Element Analysis;Warm Pressing
File
References
- Arbstedt, P., 1986, 'Developments in Iron ans Steel Powder Production,' Metal Powder Reports, Vol. 41, No. 1, pp. 64-67
- St Laurent, S. and Chagnon, F., 1999, 'Behaviour of Steel Powder Mixtures Processed by Warm Compaction,' Metal Powder Report, Vol. 54, No. 3, pp. 42 https://doi.org/10.1016/S0026-0657(99)80408-1
- Yang, H. C., Lee, J. W. and Kim, K. T., 2004, 'Rubber Isostatic Pressing of Metal Powder under Warm Temperatures,' Powder Technol, Vol. 139, pp. 240-251 https://doi.org/10.1016/j.powtec.2003.01.001
- Park, J. G. and Kim, K. T., 2004, 'Densification Behavior of Metal Powder under Warm Isostatic Pressing by Using a Metal Mold,' Trans. Of KSME (A), Vol. 28, No. 6, pp. 838-847 https://doi.org/10.3795/KSME-A.2004.28.6.838
- Shima, S. and Oyane, M., 1976, 'Plasticity Theory for Porous Metals,' Int. J. Mech. Sci., Vol. 18, pp. 285-291 https://doi.org/10.1016/0020-7403(76)90030-8
- Kim, K. T., Choi, S. W. and Park, H., 2000, "Densification Behavior of Ceramic Powder Under Cold Compaction," ASME J. Eng. Mat. Tech., Vol. 122, No. 4, pp. 238-244 https://doi.org/10.1115/1.482793
- ABAQUS User's I, II and III Manual, 2001, Ver. 6.2, H.D. Hibbitt, I. Karlsson and E.P. Sorenson, USA
- Augereau, F., Laux, D., Allais, L., Mottot M. and Caes, C., 2007, 'Ultrasonic Measurement of Anisotropy and Temperature Dependence of Elastic Parameters by a Dry Coupling Method Applied to a 6061-T6 alloy,' Ultrasonics, Vol. 46, pp. 34-41 https://doi.org/10.1016/j.ultras.2006.10.002
- Ledbetter, H. M., 1982, 'Temperature Behaviour of Young's Moduli of Forty Engineering Alloys,' Cryogenics, pp. 653-656
- Andrade, U. R., Meyers, M. A. and Chokshi, A. H., 1994, 'Constitutive Description of Worand Shork- Hardened Copper,' Scripta Meter., Vol. 30, No. 7, pp. 933-938 https://doi.org/10.1016/0956-716X(94)90418-9
- Ludwik, P., 1909, 'Elemente der Technologischen Mechanik,' Springer, Berlin
- Kim, K. T., Yang, H. C. and Hong, S. T., 2001, "Densification Behavior of Titanium Alloy Powder Compacts at High Temperature," Powder Metall., Vol. 44, No. 1, pp. 34-40 https://doi.org/10.1179/003258901666149
- Song, M. C., Kim, H. G. and Kim, K. T., 1996, 'Creep Densification of Copper Power Compact,' Int. J. Mech. Sci., Vol. 38, No. 11, pp. 1197-1208 https://doi.org/10.1016/0020-7403(96)00011-2