Densification rate of metal powders during hot uniaxial compaction

被引：5
作者：
Montes, J. M. [1 ]
Cuevas, F. G. [2 ]
Cintas, J. [1 ]
Urban, P. [1 ]
机构：
[1] Univ Seville, ETSI, Met & Mat Engn Grp, Seville 41092, Spain
[2] Univ Huelva, ETSI, Dept Chem & Mat Sci, Palos De La Frontera 21819, Huelva, Spain
来源：
POWDER METALLURGY | 2012年 / 55卷 / 05期
关键词：
Creep; Modelling; Metals; POWER-LAW CREEP;
D O I：
10.1179/1743290111Y.0000000010
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
A model to describe the densification rate of a metal powder aggregate undergoing constant uniaxial pressure and temperature conditions is proposed. The model is based on the power law creep equation, and it is obtained by using the equivalent simple cubic system, a theoretical tool proposed by the authors in previous work. This theoretical tool assumes that it is possible to predict the evolution of the densification under the pressure of an actual powder system via the study of the same problem in a system of deforming spheres packed into a simple cubic lattice. The proposed model is validated with the help of experimental data obtained from uniaxial hot compaction experiments carried out with aluminium, tin and lead powders. The agreement obtained between theoretical curves and experimental data is reasonably good.
引用
收藏
页码：388 / 394
页数：7
相关论文
共 22 条
  • [1] PRACTICAL APPLICATIONS OF HOT-ISOSTATIC PRESSING DIAGRAMS - 4 CASE STUDIES
    ARZT, E
    ASHBY, MF
    EASTERLING, KE
    [J]. METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1983, 14 (02): : 211 - 221
  • [2] Brandes Eric A., 1983, SMITHELLS METALS REF, P25
  • [3] Dietze M., 1991, MET POWDER REP, V46, P30
  • [4] Evans R.W. Wilshire., 1993, INTRO CREEP
  • [5] CREEP IN FACE-CENTRED CUBIC METALS WITH SPECIAL REFERENCE TO COPPER
    FELTHAM, P
    MEAKIN, JD
    [J]. ACTA METALLURGICA, 1959, 7 (09): : 614 - 627
  • [6] Frost H. J., 1982, PLASTICITY CREEP MET, P1
  • [7] JAMES PJ, 1972, POWDER METALL INT, V4, P1
  • [8] Kevin McCoy J, 1983, METALL T A, V16A, P1903
  • [9] Porosity effect on the electrical conductivity of sintered powder compacts
    Montes, J. M.
    Cuevas, F. G.
    Cintas, J.
    [J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2008, 92 (02): : 375 - 380
  • [10] Electrical resistivity of metal powder aggregates
    Montes, J. M.
    Cuevas, F. G.
    Cintas, J.
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 2007, 38 (06): : 957 - 964
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