About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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Advanced Joining Technologies for Automotive Lightweight Structures
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Presentation Title |
Microstructure and Properties of Mg/Mg and Mg/Al FSW Welds |
Author(s) |
Krzysztof Mroczka, Stanislaw Dymek, Adam Pietras, Aleksandra Węglowska, Carter Hamilton, Mateusz Kopyściański |
On-Site Speaker (Planned) |
Krzysztof Mroczka |
Abstract Scope |
Similar welds of cast AZ91 magnesium and dissimilar welds of cast AZ91 with wrought 6082 aluminum were fabricated by FSW. The unique microstructures of the welds were characterized through light and electron microscopies. A new approach to tensile testing of the welds was applied - micro specimens excised from the specific areas of the weld. The micro samples were precisely excised by wire EDM, and the cross-section of each specimen was 0.7 x 0.7 mm. Conventional tensile tests were also performed on macro samples containing the entire weld. Afterward, fracture surfaces were examined by SEM, and micro-hardness tests revealed the hardness distribution across the weld cross-sections. To complement the microstructural characterization, numerical simulations of the welding process provided deeper insight into the material flow during mixing and to the temperature distributions across the weld zones. The research was carried out as part of a project financed by the Polish government. |