Thixoextrusion of an A356 alloy: microstructural studies and high temperature fatigue behaviour

被引：11
作者：
de Freitas, E
Ferrante, M [1 ]
da Silva, VF
Bose, W
Spinelli, D
机构：
[1] Univ Fed Sao Carlos, Dept Mat Engn, BR-13560 Sao Carlos, SP, Brazil
[2] Univ Sao Paulo, SC, Dept Engn Mat Automobilist & Aeronaut, Sao Carlos, SP, Brazil
来源：
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2004年 / 155卷
基金：
巴西圣保罗研究基金会;
关键词：
semi-solid; thermal fatigue; A356;
D O I：
10.1016/j.jmatprotec.2004.04.314
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Isothermal tensile. isothermal and thermomechanical fatigue tests were conducted on thixoextruded and permanent mould cast A356 T6 aluminium alloy over a broad range of temperatures. The results revealed a significant decrease in strength parameters at 280degreesC, for both materials. The fatigue lives of thixoextruded material were substantially higher than those of permanent mould cast samples under isothermal and thermomechanical fatigue loading. At corresponding mechanical and inelastic strain ranges, thermornechanical out-of-phase cycling were higher than in-phase cycling for the alloy. Due to data scatter, the out-of-phase fatigue lives of the permanent mould cast samples and of the thixoextruded samples appeared to be very similar. (C) 2004 Elsevier B.V. All rights reserved.
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页码：1629 / 1633
页数：5
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