Isothermal forging of AA2618 reinforced with 20% of alumina particles

被引：48

作者：

Cavaliere, P ^{[1
]}

机构：

[1] Univ Lecce, Fac Engn, INFM, Dept Ingn Innovaz, I-73100 Lecce, Italy

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2004年 / 35卷 / 06期

关键词：

aluminium based metal matrix composites; isothermal forging; damaging; FEM;

D O I：

10.1016/j.compositesa.2004.02.014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The isothermal forming behaviour of AA2618 + 20% Al2O3 has been studied by hot-torsion and hot-compression tests. The constitutive equations and the strain rate sensitivity coefficient of the investigated composite were estimated from flow stress curves. The strain rate sensitivity coefficient reached the highest values in the temperature and strain rate ranges of 450-500 degreesC and 10(-2)- 10(-1) s(-1), respectively. The microstructural evolution of the material during deformation was studied by optical and scanning electron microscopy. The degree of material damage was evaluated in terms of matrix-particle decohesion and particles fracture. A three-dimensional FEM modelling of a real industrial component was performed in order to determine the best forging conditions. This component was isothermally forged under the process conditions derived by the FEM simulations, a defect free product was thus obtained. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：619 / 629

页数：11

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