[Kovove materialy - Metallic materials]
    Thu - November 07, 2024 - 19:51 No. of hits : 1796831 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 60 (2022), Issue 4

Precipitation behavior prior to hot roll in the cold-rolled Al-Mg and Al-Mg-Zr alloys
MOHAMMAD SALIM KAISER, HOSSAIN M. MAMUN AL RASHED
vol. 60 (2022), no. 4, pp. 247 - 256
DOI: 10.31577/km.2022.4.247

Abstract
Precipitation behavior of directly cold-rolled and prior to hot roll Al-5Mg alloy with ternary zirconium has been examined. Hot-rolled and cold-rolled alloy samples are aged simultaneously isochronally and isothermally for different temperatures and times. Hardness, resistivity, impedance value, and DSC study have been considered to comprehend the precipitation behavior of the differently aged alloys. No age-hardening response is observed for all the alloys, but the directly cold-rolled Zr-added alloy resists the soften behavior than that of prior to hot roll alloy. Precipitation kinetics of Al3Zr in Al-5Mg-0.3Zr alloys is controlled by the diffusion of zirconium in aluminum. Microstructures display that the Al-5Mg alloy becomes almost fully recrystallized after aging at 300 °C for 300 min. But Zr-added alloys do not show this scenario owing to the presence of metastable fine L12 Al3Zr precipitates, which are thermally stable at high aging temperatures.

Key words
Al-Mg alloys, rolling, resistivity, precipitation, DSC, microstructure

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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