Effect of geometric work-hardening and matrix work-hardening on workability and densification of aluminium-3.5% alumina composite during cold upsetting

被引：54

作者：

Narayanasamy, R. ^{[1
]}

Anandakrishnan, V. ^{[2
]}

Pandey, K. S. ^{[3
]}

机构：

[1] Natl Inst Technol, Dept Prod Engn, Tiruchirappalli 620015, Tamil Nadu, India

[2] SASTRA Univ, Sch Mech Engn, Thanjavur 613402, Tamil Nadu, India

[3] Natl Inst Technol, Dept Met Engn, Tiruchirappalli 620015, Tamil Nadu, India

来源：

MATERIALS & DESIGN | 2008年 / 29卷 / 08期

关键词：

densification; geometric work-hardening; matrix work-hardening; workability; formability stress index; cold upsetting;

D O I：

10.1016/j.matdes.2007.11.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The densification is a measure of deformation in upset forming of Powder Metallurgy (P/M) processes. A complete experimental investigation on the deformation behaviour of aluminium-3.5% alumina powder composite has been discussed for the case of triaxial stress state condition. Cold upsetting of aluminium-3.5% alumina composite with and with no annealing having different initial preform relative density and with different aspect ratio was carried out and the densification behaviour of the preform under triaxial stress state condition was determined. A new true strain considering the effect of bulging was taken into account for the case of determination of the hoop strain. Plots made for different preforms were analyzed for the densification behaviour of preforms considering the effect of both geometrical work-hardening (GWH) and the matrix work-hardening (MWH). (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1582 / 1599

页数：18

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