Laser Welded NiTi - Oliveira, João Pedro;Braz Fernandes, Francisco;Miranda, Rosa M.
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Shape memory alloys (SMAs) are a unique class of materials with the ability to recover their shape when the temperature is increased. An increase in temperature can result in shape recovery even under high applied loads. SMAs can also absorb and dissipate mechanical energy by undergoing a reversible hysteretic shape change when subjected to applied mechanical cyclic loading. These characteristics have made SMAs very popular for applications such as sensing and actuation, absorption and vibration damping. The application of SMAs spans a wide variety of industrial sectors such as aerospace…mehr

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Produktbeschreibung
Shape memory alloys (SMAs) are a unique class of materials with the ability to recover their shape when the temperature is increased. An increase in temperature can result in shape recovery even under high applied loads. SMAs can also absorb and dissipate mechanical energy by undergoing a reversible hysteretic shape change when subjected to applied mechanical cyclic loading. These characteristics have made SMAs very popular for applications such as sensing and actuation, absorption and vibration damping. The application of SMAs spans a wide variety of industrial sectors such as aerospace automotive, biomedical and oil exploration. The demand of joining techniques for SMAs has become of great importance, as their functional properties, namely shape memory effect and superelasticity, present unique solutions for state-of-the-art applications. An investigation was conducted on laser welding of NiTi alloys aiming at correlating the mechanical cycling behavior and the microstructure obtained.
Autorenporträt
João Pedro Oliveira got his MSc degree in Materials Engineering at Faculdade de Ciência e Tecnologia, Universidade Nova de Lisboa, Portugal and is now a PhD student at this University, where he works under the supervision of Professors Francisco Braz Fernandes and Rosa Miranda. He is specialized in shape memory alloys and laser welding.