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Journal of Materials Engineering and Performance

Erschienen in:

01.01.2013

Effects of the Delay Between Quenching and Aging on Hardness and Tensile Properties of A356 Aluminum Alloy

verfasst von: Lorella Ceschini, Alessandro Morri, Andrea Morri

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 1/2013

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Abstract

The aim of the study was to evaluate the accuracy of heat treatment guidelines, generally followed in industrial practices, about the T6 heat treatment of A356 aluminum alloy. In particular, the effect of the delay between quenching and artificial aging (pre-aging time) on microstructure, hardness, and tensile behavior was studied using specimens extracted from different locations of a cylinder head, characterized by different cooling rates and, consequently, by different secondary dendrite arm spacing values. Hardness and tensile tests confirmed the detrimental effect of pre-aging with a 20% reduction in hardness and strength after approximately 1 h of pre-aging, both for samples with fine and large SDAS. Differential scanning calorimetry analyses on samples that were solutionized, quenched, and pre-aged between 0 and 96 h, suggested that the nature and composition of the clusters formed during pre-aging, rather than their size, influenced the subsequent precipitation process and the final mechanical properties of the alloy.

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Titel: Effects of the Delay Between Quenching and Aging on Hardness and Tensile Properties of A356 Aluminum Alloy
verfasst von: Lorella Ceschini
Alessandro Morri
Andrea Morri
Publikationsdatum: 01.01.2013
Verlag: Springer US
Erschienen in: Journal of Materials Engineering and Performance / Ausgabe 1/2013
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-012-0208-1

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