Comparison of the Natural Ageing Behaviour of EN AW 6082 and Lead Free EN AW 6023 Aluminium Alloys

Martin Fujda; Miloš Matvija; Pavol Zubko

doi:10.4028/www.scientific.net/KEM.586.125

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Local Tribological Characteristics of Steel Sheets for Microforming
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Micro-Mechanical Testing of Metal Foam Cell Walls Using Miniature Three-Point Bending
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Comparison of the Natural Ageing Behaviour of EN AW 6082 and Lead Free EN AW 6023 Aluminium Alloys
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Strain Measurement in Local Volume by Non-Contact Videoextensometric Technique on Ultra High Strength Steels
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The Variation of Mechanical Properties of WC-Based HVOF Sprayed Coatings with Respect to the Co Content
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Microstructural and Vickers Microhardness Evolution of Heat Treated Secondary Aluminium Cast Alloy
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 586Comparison of the Natural Ageing Behaviour of EN...

Comparison of the Natural Ageing Behaviour of EN AW 6082 and Lead Free EN AW 6023 Aluminium Alloys

Abstract:

The effect of solution annealing temperature (550 and 570°C) on the Vickers microhardness of the quenched and naturally aged states of EN AW 6082 and lead free aluminium alloy was investigated. The different chemical composition of analysed alloys did not affect the alloys microhardness after quenching. The total strengthening of both alloys was similar due to the same conjunction of the individual strengthening mechanism of alloys matrix after quenching. The microhardness of EN AW 6082 increased with ageing time increasing according to logarithmic dependence because the increment in alloy microhardness decreased with the increase in ageing time. On the contrary, microhardness of lead-free EN AW 6023 did not increase markedly either after 500 hours natural ageing. This alloy have very slow rate of natural ageing, probably due to suppressed diffusion of alloying elements and clusters and/or GP-zone formation in supersaturated solid solution.

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Periodical:

Key Engineering Materials (Volume 586)

Pages:

125-128

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.586.125

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Online since:

September 2013

Authors:

Martin Fujda, Miloš Matvija, Pavol Zubko

Keywords:

EN AW 6023, EN AW 6082, Microhardness, Natural Aging, Solution Annealing

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