Influence of Process Parameters on Microstructural Evolution and Mechanical Properties in Friction Stirred Al-2024 (T3) Alloy
Abstract
Commercial Al-2024 (T3) alloy was friction stir welded at various heat index (HI) values using bead on plate approach. Quantitative analysis using electron microscopy and differential scanning calorimetry (DSC) revealed a complex variation in the precipitation evolution of Guinier- Preston-Bagaryatskii (GPB) zone and Al2CuMg (S phase) precipitates in nugget and heat affected zone (HAZ). Differential scanning calorimetry data also suggested formation energy of GPB zone equal to 2236 J g-1. Tensile properties attained a maximum for HI values close to 3·94 in the nugget region, which was attributed to corresponding minimisation of the volume fraction of coarse S phase to the profit of GPB zone. the precipitation of fine S phase precipitates resulted in higher tensile properties in HAZ as compared to those in nugget for all HI values. Experimental data were used to determine major strengthening mechanisms by using constitutive relationships. © 2009 Institute of Materials, Minerals and Mining.
Recommended Citation
V. Dixit et al., "Influence of Process Parameters on Microstructural Evolution and Mechanical Properties in Friction Stirred Al-2024 (T3) Alloy," Science and Technology of Welding and Joining, vol. 14, no. 4, pp. 346 - 355, SAGE Publications; Institute of Materials, Minerals and Mining (UK), May 2009.
The definitive version is available at https://doi.org/10.1179/136217109X415910
Department(s)
Materials Science and Engineering
Keywords and Phrases
Aluminium alloys; Differential scanning calorimetry; Friction stir welding; Precipitation evolution; Tensile strength
International Standard Serial Number (ISSN)
1362-1718; 1362-1718
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 SAGE Publications; Institute of Materials, Minerals and Mining (UK), All rights reserved.
Publication Date
01 May 2009