Results 71 to 80 of about 74,781 (241)

A Focus on High-Temperature Shape Memory Alloys [PDF]

Shape Memory and Superelasticity, 2015
There is growing interest in high-temperature shape memory alloys both from academia and industry, as this class of smart materials can deliver large reversible strains at elevated temperatures. Target applications are in aerospace, automotive, energy exploration, and conversion industries, where the operating temperatures are often well above 100 C ...
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Effect of aging on the martensitic transformation and functional properties of a Ni44.8Ti45.2Hf5Cu5 multi component shape memory alloy

Discover Mechanical Engineering
In this study, a Ni44.8Ti45.2Hf5Cu5 shape memory alloy was fabricated by vacuum arc-melting in a copper mold. The alloy was solution annealed at 1000 °C for 60 min and subsequently aged at a temperature range between 300 °C and 600 °C for different time ...
Sadjad Baradari, Natalia Resnina, Mahmoud Nili-Ahmadabadi   +2 more
doaj   +1 more source

Robust Bain distortion in the premartensite phase of platinum substituted Ni2MnGa magnetic shape memory alloy

, 2017
The premartensite phase of shape memory and magnetic shape memory alloys (MSMAs) is believed to be a precursor state of the martensite phase with preserved austenite phase symmetry.
Chadov, S., D'Souza, S., Devi, P., Dutta, B., Felser, C., Gibbs, A., Hickel, T., Pandey, D., Singh, S., Zavareh, M., Zavareh, M.   +10 more
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Martensite aging – Avenue to new high temperature shape memory alloys

Acta Materialia, 2015
Abstract High-temperature shape memory alloys are attractive for efficient solid state actuation. A key criterion for shape memory alloys is the martensite start temperature. The current study introduces a concept for increasing this temperature of alloys initially not suited for high-temperature actuation.
Niendorf, Thomas, Somsen, Christoph, Eggeler, Gunther, Chumlyakov, Yuri I., Maier, Hans Jürgen, Krooß, Philipp   +5 more
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Research on Conical Magnetorheological and Shape Memory Alloy Composite Transmission Performance

Jixie chuandong, 2019
In view of the disadvantage of magnetorheological fluid (MRF) performance degradation at high temperature, a conical MRF and shape memory alloy (SMA) hybrid transmission method is proposed.
Xi Wang, Jin Huang, Yong Xie
doaj  

Laser welding of precipitation strengthened Ni-rich NiTiHf high temperature shape memory alloys: Microstructure and mechanical properties

Materials & Design, 2019
High temperature shape memory alloys are currently attracting significant attention by the aerospace industry due to the potential use of shape memory and superelastic properties at temperatures above 100 °C.
J.P. Oliveira, N. Schell, N. Zhou, L. Wood, O. Benafan   +4 more
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Large negative magnetoresistance in a ferromagnetic shape memory alloy : Ni_{2+x}Mn_{1-x}Ga

, 2005
5% negative magnetoresistance (MR) at room temperature has been observed in bulk Ni_{2+x}Mn_{1-x}Ga. This indicates the possibility of using Ni_{2+x}Mn_{1-x}Ga as magnetic sensors. We have measured MR in the ferromagnetic state for different compositions
Barman, S. R., Biswas, C., Rawat, R.
core   +1 more source

The effect of Hf on the microstructure, transformation temperature, and the shape memory properties of Zr–Cu-based high-entropy shape memory alloys

Journal of Materials Research and Technology
The microstructures, phase transformation temperatures, and shape memory properties of Hf-modified Zr50−xHfxCu25Ni7.5Co17.5 and Zr50−xHfxCu25Ni10Co15 high-entropy shape memory alloys (SMAs) were investigated.
Zhijie Li, Zhaolong Ma, Xingwang Cheng, Hongnian Cai   +3 more
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A shape memory alloy adaptive tuned vibration absorber: design and implementation

, 2005
In this paper a tuned vibration absorber (TVA) is realized using shape memory alloy (SMA) elements. The elastic modulus of SMA changes with temperature and this effect is exploited to develop a continuously tunable device.A TVA with beam elements is ...
Brennan, M.J., Mace, B.R., Rustighi, E.
core   +1 more source

Transformation Temperatures, Shape Memory and Magnetic Properties of Hafnium Modified Ti-Ta Based High Temperature Shape Memory Alloys

High Temperature Materials and Processes, 2017
In this study the modification effect of Hf content on the shape memory properties and magnetic permeability of a 75.5-77Ti-20Ta-3-4.5Hf alloy system has been systematically studied by DSC, three-point bend test, vector network analyzer and XRD.
Khan W.Q., Wang Q., Jin X.
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