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Precipitation Kinetics and Evaluation of the Interfacial Mobility of Precipitates in an AlSi7Cu3.5Mg0.15 Cast Alloy with Zr and V Additions

1
Department of Mining, Metallurgy and Materials Engineering, Aluminum Research Center – REGAL, Laval University, 1065, ave de la Médecine, Québec, QC G1V 0A6, Canada
2
Rio Tinto, Arvida Research and Development Centre, 1955, Mellon Blvd, Saguenay, Québec, QC G7S 4K8, Canada
3
Linamar Montupet Light Metal Division, 3, rue de Nogent, 60290 Laigneville, France
4
Linamar Corporation – The Center, 700 Woodlawn Road West, Guelph, ON N1K 1G4, Canada
5
Department of Applied Sciences, University of Québec at Chicoutimi, 555, boul. de l’Université, Saguenay, QC G7H 2B1, Canada
*
Author to whom correspondence should be addressed.
Metals 2019, 9(7), 777; https://doi.org/10.3390/met9070777
Received: 10 June 2019 / Revised: 9 July 2019 / Accepted: 9 July 2019 / Published: 11 July 2019
(This article belongs to the Special Issue Phase Transformations in Aluminium Alloys)
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Abstract

Recent environmental restrictions constrained car manufacturers to promote cast aluminum alloys working at high temperatures (180 °C–300 °C). The development of new alloys permits the fabrication of higher-strength components in engine downsizing. Those technologies increase internal loadings and specific power and stretch current materials to their limits. Transition metals in aluminum alloys are good candidates to improve physical, mechanical, and thermodynamic properties with the aim of increasing service life of parts. This study is focused on the modified AlSi7Cu3.5Mg0.15 alloy where Mn, Zr, and V have been added as alloying elements for high-temperature applications. The characterization of the cast alloy in this study helps to evaluate and understand its performance according to their physical state: As-cast, as-quenched, or artificially aged. The precipitation kinetics of the AlSi7Cu3.5Mg0.15 (Mn, Zr, V) alloy has been characterized by differential scanning calorimetry (DSC), transmission electron microscopy (TEM) observations, and micro-hardness testing. The Kissinger analysis was applied to extract activation energies from non-isothermal DSC runs conducted at different stationary heating rates. Finally, first-order evaluations of the interfacial mobility of precipitates were obtained. View Full-Text
Keywords: AlSi7Cu3.5Mg0.15 alloy; interfacial mobility; differential scanning calorimetry (DSC); precipitation kinetics; Kissinger methodology AlSi7Cu3.5Mg0.15 alloy; interfacial mobility; differential scanning calorimetry (DSC); precipitation kinetics; Kissinger methodology
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Heugue, P.; Larouche, D.; Breton, F.; Massinon, D.; Martinez, R.; Chen, X.-G. Precipitation Kinetics and Evaluation of the Interfacial Mobility of Precipitates in an AlSi7Cu3.5Mg0.15 Cast Alloy with Zr and V Additions. Metals 2019, 9, 777.

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