The paper describes the research done in order to assemble shape memory alloys using welding technologies with the aim to reduce the heat affected zone. Ultrasonic and hybrid welding can be solutions that could be considered for this purpose. Experiments on welding shape memory and ferromagnetic shape memory alloys have been performed on bulk and thin films and the interface has been characterized using microscopic observations. Our observations show the difficulties in assembling shape memory ribbons with conventional sonotrode/anvil solutions due to the low thickness of the ribbons and the need to develop microstriations on the surface of the ultrasonic welding tools.

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1. Rapidly Solidified Ferromagnetic Shape Memory Alloys