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Constitutive Equations for Hot Extrusion of AA6005A, AA6063 and AA7020 Alloys

机译:AA6005A,AA6063和AA7020合金热挤压的本构方程

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Constitutive equations relate thermo-mechanical parameters, i.e. strain (e), strain rate (ε) and temperature (7), with flow stress (σ). The most popular constitutive relationship, among those used in the study of hot deformation, is the phenomenological sinh Garofalo equation. In recent years several papers described the hot deformation of aluminum alloys by mean of hot torsion testing. However, sinh constitutive parameters are seldomly available in literature even for the commonest aluminum alloys used today by the extrusion industry. This paper presents the result of the torsion tests providing constitutive equations for AA6005A, AA6063 and AA7020 alloys. The relative extrudabilities of these alloys were estimated by means of FEM simulation carried out by the HyperXtrude® software.
机译:本构方程将热力学参数,即应变(e),应变率(ε)和温度(7)与流动应力(σ)关联起来。在热变形研究中,最流行的本构关系是现象学的Garofalo方程。近年来,有几篇论文通过热扭转试验描述了铝合金的热变形。但是,即使对于当今挤出工业中使用的最普通的铝合金,正弦本构参数也很少在文献中获得。本文介绍了扭转试验的结果,提供了AA6005A,AA6063和AA7020合金的本构方程。这些合金的相对可挤出性是通过HyperXtrude®软件进行的FEM模拟估算的。

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