Fatigue properties of die-cast aluminium alloy and carbon steel dissimilar joints by friction stir welding
- Okane M. ,
- Ogura Y. ,
- Chaki T. ,
- et al
- Okane M. ,
- Ogura Y. ,
- Chaki T. ,
- Sakai H. ,
- Yasui T. and
- Fukumoto M.
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Dissimilar butt joints between die-cast ADC12 aluminium alloy (Al, 11.53%Si, 2.02%Cu) and S45C carbon steel (0.46%C, 0.64%Mn, 0.12%Cu) were fabricated by friction stir welding and their static strength and fatigue properties were investigated. Welding was performed using a cemented carbide thread probe tool at a rotational speed of 1500 rpm and a travel speed of 250 mm/min. Mechanical properties were characterised by Vickers hardness measurements and tensile tests carried out using a universal testing machine at a crosshead speed of 0.5 mm/min. Fatigue tests were carried out under load controlled conditions with a stress ratio R of 0.1. Fracture surfaces were observed by SEM. Issues discussed include fatigue fracture at the weld interface and fatigue crack initiation sites.
12th International Symposium, 26-28 Jun 2018, Poster Session, Paper 01
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