Analysis of hot forging of porous metals

被引：45

作者：

Han, HN ^{[1
]}

Lee, YG ^{[1
]}

Oh, KH ^{[1
]}

Lee, DN ^{[1
]}

机构：

[1] SEOUL NATL UNIV,CTR ADV MAT RES,KWANAK KU,SEOUL 151742,SOUTH KOREA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1996年 / 206卷 / 01期

关键词：

hot forging; elastoplastic properties; thermomechanics;

D O I：

10.1016/0921-5093(95)10000-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Thermomechanical elastoplastic problems in hot forging of the porous metals have been analysed using the thermoelastoplastic finite element method. This finite element program has been formulated using the yield condition advanced by Lee and Kim and developed using the thermoelastoplastic time integration procedure. A hardening law of non-porous metals as a function of temperature, plastic strain and strain rate is proposed. The thermal and thermoelastic properties of porous metals, which are dependent on the relative density and the corresponding properties of the non-porous base metal, are used in finite element calculations. Thermomechanical response and densification behaviour of the porous metals during hot forging have been calculated at various initial relative densities, strain rates and temperatures. The calculated results are in good agreement with experimental data.

引用

页码：81 / 89

页数：9

共 25 条

[1] DENSIFICATION OF IRON COMPACTS WITH VARIOUS INITIAL POROSITIES UNDER HYDROSTATIC-PRESSURE [J].

BINER, SB ;

SPITZIG, WA .

ACTA METALLURGICA ET MATERIALIA, 1990, 38 (04) :603-610

[2] CORRELATIONS FOR DIFFUSION CONSTANTS [J].

BROWN, AM ;

ASHBY, MF .

ACTA METALLURGICA, 1980, 28 (08) :1085-1101

[3] THERMAL AND THERMOELASTIC PROPERTIES OF ISOTROPIC COMPOSITES [J].

BUDIANSK.B .

JOURNAL OF COMPOSITE MATERIALS, 1970, 4 :286-&

[4] DENSIFICATION OF POROUS ALLOY-STEEL PREFORMS AT HIGH-TEMPERATURE [J].

CHO, HK ;

SUH, J ;

KIM, KT .

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, 1994, 36 (04) :317-328

[5]

DORAIVELU SM, 1984, INT J MECH SCI, V26, P527, DOI 10.1016/0020-7403(84)90006-7

[6] DEFORMATION AND DENSIFICATION OF POROUS PREFORMS IN HOT FORGING [J].

FISCHMEISTER, HF ;

AREN, B ;

EASTERLING, KE .

POWDER METALLURGY, 1971, 14 (27) :144-+

[7]

GAROFALO F, 1963, T METALL SOC AIME, V227, P251

[8] CONTINUUM THEORY OF DUCTILE RUPTURE BY VOID NUCLEATION AND GROWTH .1. YIELD CRITERIA AND FLOW RULES FOR POROUS DUCTILE MEDIA [J].

GURSON, AL .

JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME, 1977, 99 (01) :2-15

[9] ELASTOPLASTIC FINITE-ELEMENT ANALYSIS FOR POROUS METALS [J].

HAN, HN ;

KIM, HS ;

OH, KH ;

LEE, DN .

POWDER METALLURGY, 1994, 37 (02) :140-146

[10] ANALYSIS OF COEFFICIENT OF FRICTION IN COMPRESSION OF POROUS METAL RINGS [J].

HAN, HN ;

KIM, HS ;

OH, KH ;

LEE, DN .

POWDER METALLURGY, 1994, 37 (04) :259-264

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