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Revealing Transformation and Deformation Mechanisms in NiTiHf and NiTiAu High Temperature Shape Memory Alloys Through Microstructural Investigations

2016; Oxford University Press; Volume: 22; Issue: S3 Linguagem: Inglês

10.1017/s1431927616010618

1435-8115

Lee Casalena, J.M. Sosa, D.R. Coughlin, Fan Yang, X. Chen, Harshad M. Paranjape, Yu Gao, R.D. Noebe, Glen S. Bigelow, D. J. Gaydosh, Santo Padula, Y. Wang, Peter M. Anderson, Michael J. Mills,

Creativity in Education and Neuroscience

Shape memory alloys (SMAs) are 'smart' materials which are able to change their shape in response to changes in temperature.This unusual behavior arises from a solid-state phase transformation, which can be utilized to generate force.These extraordinary properties have made them of great interest to the automotive and aerospace industries for potential light-weight solid-state actuator applications.An actuator is any mechanism which converts energy, such as heat or electricity, into motion.SMAs outshine traditional actuating systems such as pneumatics, hydraulics, and DC motors due to their remarkably high power-to-weight ratios [1].By replacing heavy conventional actuating systems, they offer the possibility of higher reliability, lighter weight and increased capability while lowering space and power consumption.This will lead to improved efficiency and reduced emissions, particularly in aircraft.There is currently a drive toward developing SMAs which can be used in high temperature environments, for applications such as fuel control valves within jet engines [2].