On the Densification Kinetics of Metallic Powders Under Hot Uniaxial Pressing

J. M. Montes; F. G. Cuevas; J. Cintas; F. Ternero; E. S. Caballero

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자료유형: 학술저널

저자정보: J. M. Montes (Universidad de Sevilla) F. G. Cuevas (Universidad de Huelva) J. Cintas (Universidad de Sevilla) F. Ternero (Universidad de Sevilla) E. S. Caballero (Universidad de Sevilla)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.25 No.3

발행연도: 2019.1

수록면: 723 - 732 (10page)

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A new model undertaking the densification kinetics of uniaxially pressed metallic powders at constant temperature is proposed. This model is developed according to the power law of creep, and the expression of the ‘net pressure’ derived by theauthors in a previous work. This net pressure describes the ‘geometrical hardening’ experienced by the powder mass, duringcompression. In order to validated the model three different powders were uniaxially pressed, aluminium, tin and lead, beingobtained data from hot compaction experiments. The similarity between the model predicted curves and the experimentaldata is quite acceptable. In addition, the goodness of the model is contrasted with two other theoretical models addressing thesame problem. The approach developed can be useful to model hot uniaxial pressing and electrical consolidation processes,which start with loose powders, i.e., not previously cold compacted powders.

#Densification creep · Modelling · Metal powders · FAST

참고문헌 (24)

참고문헌 신청

R.W. Evans / 1993 / Introduction to Creep / The Institute of Materials

H.J. Frost / 1982 / Deformation-Mechanism Maps. The Plasticity and Creep of Metals and Ceramics / Pergamon Press :1~30

D.W. Readey / 1987 / Effects of vapor transport on microstructure development / Ceramic Microstructures’86, Materials Science Research 1:485~496

P. J. James / 1972 / Powder Metall. Int 4:1~8

R. M. Spriggs / 1974 / Sci. Sint 6:1~7

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