Hot compression behavior of the AZ91 magnesium alloy produced by high pressure die casting

被引：53

作者：

Cerri, E. ^{[1
]}

Leo, P. ^{[1
]}

De Marco, P. P. ^{[1
]}

机构：

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

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2007年 / 189卷 / 1-3期

关键词：

Mg alloys; high pressure die casting; precipitation; hot deformation; ZN; DEFORMATION;

D O I：

10.1016/j.jmatprotec.2007.01.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The hot deformation behavior of a Mg-9Al-1Zn alloy produced by high pressure die casting has been investigated by means of compression tests in the temperature and strain rate ranges of 125-300 degrees C and 1.6 x 10(-5) to 10(-1) s(-1), respectively. The samples were deformed in the high pressure die casting state or after an exposure at 415 degrees C for 2 h to evaluate any different response to deformation. A premature fracture at 45 degrees respect to the compression axis was observed in samples strained at low temperatures and high strain rates. The stress-strain curves are explained in terms of microstructure evolution, with emphasis on the eutectic phase and on dynamic precipitation phenomena occurring at low and high temperature of deformation. Constitutive parameters were evaluated in order to better understand the microstructure evolution. Light and scanning electron microscopy have been performed to correlate the microstructure to the deformation parameters in all the tested conditions. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：97 / 106

页数：10

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