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Goliński, Jacek
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Publications (5/5 displayed)
- 2020Similar and dissimilar welds of ultrafine grained aluminium obtained by friction stir weldingcitations
- 2017Ultrafine-Grained Plates of Al-Mg-Si Alloy Obtained by Incremental Equal Channel Angular Pressing: Microstructure and Mechanical Propertiescitations
- 2015Influence of grain size on the corrosion resistance of aluminium alloy Al 6060
- 2015Microstructure evolution in aluminium 6060 during Incremental ECAP
- 2015Microstructure and mechanical properties of friction stir welded joints made from ultrafine grained aluminium 1050citations
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article
Similar and dissimilar welds of ultrafine grained aluminium obtained by friction stir welding
Abstract
Samples from commercially pure aluminium were subjected to various number of passes of Incremental EqualChannel Angular Pressing (I-ECAP) and subsequently welded using Friction Stir Welding (FSW). Similar anddissimilar welds were obtained and investigated in terms of their microstructure and mechanical properties. Inthe case of similar weld from coarse grained aluminium in the stir zone a decreased average grain size wasobtained, which resulted in enhanced microhardness. In the case of samples after I-ECAP, the ultrafine grainedregime has not been preserved, which caused a drop in microhardness in the stir zone. Nevertheless, obtainedresults were still higher than those for coarse grained sample. In all welds the average grain size of 2.1–3.7 μmwas obtained. No correlation between the microstructure of base material and stir zone has been found. Tensiletests revealed, that the localization of deformation was obtained in each weld in the area of the biggest averagegrain size. For dissimilar welds from deformed and undeformed samples a gradient change in microstructure andmicrohardness was obtained on the cross-section of the welds.