Effect of geometric work-hardening and matrix work-hardening on new constitutive relationship for aluminium-alumina P/M composite during cold upsetting

被引：7

作者：

Narayanasamy R. ^{[1
]}

Anandakrishnan V. ^{[2
]}

Pandey K.S. ^{[3
]}

机构：

[1] Department of Production Engineering, National Institute of Technology, Tiruchirappalli

[2] School of Mechanical Engineering, SASTRA University, Thanjavur

[3] Department of Metallurgical Engineering, National Institute of Technology, Tiruchirappalli

来源：

International Journal of Mechanics and Materials in Design | 2008年 / 4卷 / 3期

关键词：

Cold upsetting; Constitutive model; Instantaneous density coefficient; Instantaneous strain hardening index; Instantaneous strain rate sensitivity; Instantaneous strength coefficient; Powder metallurgy;

D O I：

10.1007/s10999-008-9072-4

中图分类号：

学科分类号：

摘要：

The densification and strain hardening behaviour during cold deformation of sintered aluminum-3.5% alumina powder metallurgy preforms were investigated by constitutive model and experimental data obtained with no and with subsequent annealing. The mechanisms most likely involved in the constitutive model, namely, densification and strain hardening were studied. The effect of geometric and matrix work hardening on the various constants involved in the constitutive model, namely, instantaneous density coefficient, instantaneous strain hardening index, instantaneous strain rate sensitivity and instantaneous strength coefficient were discussed in detail. © 2008 Springer Science+Business Media, B.V.

引用

页码：301 / 315

页数：14

共 23 条

[1]

Abdel-Rahman M., El-Sheikh M.N., Workability in forging of powder metallurgy compacts, J. Mater. Proc. Tech., 54, pp. 97-102, (1995)

[2]

Bao Y., Dependence of ductile cracks formation in tensile tests on stress triaxiality stress and strain ratios, Eng. Fract. Mech., 72, pp. 505-522, (2005)

[3]

Bockstiegel G., A study of the work of compaction in powder pressing, Powder Met. Int., 3, pp. 108-112, (1971)

[4]

Doraivelu S.M., Gegel H.L., Gunasekera J.S., Malas J.C., Morgan J.T., Thomas Jr. J.F., New yield function for compressible p/m materials, Int. J. Mech. Sci., 26, pp. 527-535, (1984)

[5]

Gouveia B.P.P.A., Rodrigues J.M.C., Martins P.A.F., Ductile fracture in metalworking: Experimental and theoretical research, J. Mater. Proc. Tech., 101, pp. 52-63, (2000)

[6]

Inigoraj A.J.R., Narayanasamy R., Pandey K.S., Strain-hardening behaviour in sintered aluminium-3.5% alumina composite performs during axial compression with and without annealing, J. Mater. Proc. Tech., 84, pp. 143-148, (1998)

[7]

Kahlow K.J., Void behaviour as influenced by pressure and plastic deformation, Institute for Metal Forming Report, pp. 10-16, (1971)

[8]

Kuhn H.A., Downey C.L., Deformation characteristics and plasticity theory of sintered powder materials, Int. J. Powder Metall., 7, pp. 15-25, (1971)

[9]

Kuhn H., Lee P., Erturck T., A fracture criterion for cold forming, ASME J. Eng. Mat. Tech., 95, pp. 213-218, (1973)

[10]

Miracle D.B., Metal matrix composites - From science to technological significance, Compos. Sci. Tech., 65, pp. 2526-2540, (2005)

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