The Effect of Cooling Rate after Homogenization on the Microstructure and Properties of 2017a Alloy Billets for Extrusion with Solution Heat Treatment on the Press

Woźnicki A.; Leśniak D.; Włoch G.; Pałka P.; Leszczyńska-Madej B.; Wojtyna A.

doi:10.1515/amm-2016-0269

Archives of Metallurgy and Materials (Sep 2016)

The Effect of Cooling Rate after Homogenization on the Microstructure and Properties of 2017a Alloy Billets for Extrusion with Solution Heat Treatment on the Press

Woźnicki A.,
Leśniak D.,
Włoch G.,
Pałka P.,
Leszczyńska-Madej B.,
Wojtyna A.

Affiliations

Woźnicki A.: AGH - University of Science and Technology, Faculty of Non-Ferrous Metals, Al. A. Mickiewicza 30, 30-059 Kraków Poland
Leśniak D.: AGH - University of Science and Technology, Faculty of Non-Ferrous Metals, Al. A. Mickiewicza 30, 30-059 Kraków Poland
Włoch G.: AGH - University of Science and Technology, Faculty of Non-Ferrous Metals, Al. A. Mickiewicza 30, 30-059 Kraków Poland
Pałka P.: AGH - University of Science and Technology, Faculty of Non-Ferrous Metals, Al. A. Mickiewicza 30, 30-059 Kraków Poland
Leszczyńska-Madej B.: AGH - University of Science and Technology, Faculty of Non-Ferrous Metals, Al. A. Mickiewicza 30, 30-059 Kraków Poland
Wojtyna A.: AGH - University of Science and Technology, Faculty of Non-Ferrous Metals, Al. A. Mickiewicza 30, 30-059 Kraków Poland

DOI: https://doi.org/10.1515/amm-2016-0269
Journal volume & issue: Vol. 61, no. 3
pp. 1663 – 1670

Abstract

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The influence of cooling rate after homogenization on the 2017A alloy microstructure was analysed. The capability of the θ (Al2Cu) particles, precipitated during various homogenization coolings, for rapid dissolution was estimated. For this purpose, the DSC test was used to determine the effect of the cooling rate after homogenization on the course of melting during a rapid heating. Moreover, the samples after solution heat treatment (with short time annealing) and ageing, were subjected to the microstructure investigations and the microhardness of grains interiors measurements. It was found that cooling after homogenization at 160 °C/h is sufficient for precipitation of fine θ phase particles, which dissolve during the subsequent rapid heating. The cooling at 40 °C/h, causes the precipitation of θ phase in the form of large particles, incapable of further fast dissolution.

Published in Archives of Metallurgy and Materials

ISSN: 2300-1909 (Online)
Publisher: Polish Academy of Sciences
Country of publisher: Poland
LCC subjects: Technology: Mining engineering. Metallurgy; Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://journals.pan.pl/amm

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