Influence of Thermal Aging Parameters on the Characteristics of Aluminum Semi-Solid Alloys
The current study aimed at analyzing the response of semisolid A357 aluminum alloys to unconventional thermal treatment cycles of T4/T6/T7 conditions. The mechanical, electrical, and microstructural characterizations of such semisolid alloys were investigated. The microstructure evolutions of Fe-int...
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doaj-7b0505f2ac86497ea2ff19418d501c7d2020-11-24T21:27:41ZengMDPI AGMetals2075-47012018-09-0181074610.3390/met8100746met8100746Influence of Thermal Aging Parameters on the Characteristics of Aluminum Semi-Solid AlloysKhaled Ahmed Ragab0Mohamed Bouazara1Xiao Grant Chen2Applied Sciences, University of Quebec, Chicoutimi, QC G7H2B1, CanadaApplied Sciences, University of Quebec, Chicoutimi, QC G7H2B1, CanadaApplied Sciences, University of Quebec, Chicoutimi, QC G7H2B1, CanadaThe current study aimed at analyzing the response of semisolid A357 aluminum alloys to unconventional thermal treatment cycles of T4/T6/T7 conditions. The mechanical, electrical, and microstructural characterizations of such semisolid alloys were investigated. The microstructure evolutions of Fe-intermetallic phases and strengthening precipitates were characterized using scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. The mechanical failure of such semi solid A357 aluminum alloys, used for suspension automotive parts, is mostly related to cracking issues which start from the surface due to hardness problems and propagate due to severe load variations. For these reasons, the multiple thermal aging cycles, in this study, are applied to enhance the mechanical properties and to have compromised values compared to those obtained by standard thermal treatments. The results obtained in this work indicate that the heat treatment of this alloy can be optimized. The results showed that the optimum characteristics of A357 semisolid alloys were obtained by applying thermal under-aging cycle, interrupted thermal aging cycles and a T7/T6 two steps aging treatment condition. The electrical conductivity and electron microscopy were applied in this study to analyze the characteristics of hardening phases formed due to different aging cycles applied to the alloys investigated.http://www.mdpi.com/2075-4701/8/10/746multiple thermal agingmechanical propertieselectrical conductivityaluminum semi solid alloysSEMTEM |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Khaled Ahmed Ragab Mohamed Bouazara Xiao Grant Chen |
spellingShingle |
Khaled Ahmed Ragab Mohamed Bouazara Xiao Grant Chen Influence of Thermal Aging Parameters on the Characteristics of Aluminum Semi-Solid Alloys Metals multiple thermal aging mechanical properties electrical conductivity aluminum semi solid alloys SEM TEM |
author_facet |
Khaled Ahmed Ragab Mohamed Bouazara Xiao Grant Chen |
author_sort |
Khaled Ahmed Ragab |
title |
Influence of Thermal Aging Parameters on the Characteristics of Aluminum Semi-Solid Alloys |
title_short |
Influence of Thermal Aging Parameters on the Characteristics of Aluminum Semi-Solid Alloys |
title_full |
Influence of Thermal Aging Parameters on the Characteristics of Aluminum Semi-Solid Alloys |
title_fullStr |
Influence of Thermal Aging Parameters on the Characteristics of Aluminum Semi-Solid Alloys |
title_full_unstemmed |
Influence of Thermal Aging Parameters on the Characteristics of Aluminum Semi-Solid Alloys |
title_sort |
influence of thermal aging parameters on the characteristics of aluminum semi-solid alloys |
publisher |
MDPI AG |
series |
Metals |
issn |
2075-4701 |
publishDate |
2018-09-01 |
description |
The current study aimed at analyzing the response of semisolid A357 aluminum alloys to unconventional thermal treatment cycles of T4/T6/T7 conditions. The mechanical, electrical, and microstructural characterizations of such semisolid alloys were investigated. The microstructure evolutions of Fe-intermetallic phases and strengthening precipitates were characterized using scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. The mechanical failure of such semi solid A357 aluminum alloys, used for suspension automotive parts, is mostly related to cracking issues which start from the surface due to hardness problems and propagate due to severe load variations. For these reasons, the multiple thermal aging cycles, in this study, are applied to enhance the mechanical properties and to have compromised values compared to those obtained by standard thermal treatments. The results obtained in this work indicate that the heat treatment of this alloy can be optimized. The results showed that the optimum characteristics of A357 semisolid alloys were obtained by applying thermal under-aging cycle, interrupted thermal aging cycles and a T7/T6 two steps aging treatment condition. The electrical conductivity and electron microscopy were applied in this study to analyze the characteristics of hardening phases formed due to different aging cycles applied to the alloys investigated. |
topic |
multiple thermal aging mechanical properties electrical conductivity aluminum semi solid alloys SEM TEM |
url |
http://www.mdpi.com/2075-4701/8/10/746 |
work_keys_str_mv |
AT khaledahmedragab influenceofthermalagingparametersonthecharacteristicsofaluminumsemisolidalloys AT mohamedbouazara influenceofthermalagingparametersonthecharacteristicsofaluminumsemisolidalloys AT xiaograntchen influenceofthermalagingparametersonthecharacteristicsofaluminumsemisolidalloys |
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1725973996411813888 |