Results 181 to 190 of about 74,781 (241)

Effects of aging on a spray-formed Cu-Al-Ni-Mn-Nb high temperature shape memory alloy

Materials Science & Engineering: A, 2019
In the present study, we have investigated the influence of aging heat treatments on the microstructure, mechanical properties and shape memory effect on a spray-formed Cu-Al-Ni-Mn alloy with minor Nb additions.
F. R. Milhorato, E. M. Mazzer
semanticscholar   +1 more source

Ni–Mn–Ga high-temperature shape memory alloys

Materials Science and Engineering: A, 2006
The relationship among the composition, structure and martensitic transformation temperatures have been studied in detail for Ni 50-x Mn 25 Ga 25-x (at.%) alloys by optical and transmission election microscopy, X-ray diffraction and differential scanning calorimeter measurements.
H.B. Xu, Y. Li, C.B. Jiang
openaire   +1 more source

Fabrication, characterization and potential application of larger bulk Ti-Ni-Hf high temperature shape memory alloy composite reinforced by hybrid particles

Journal of Alloys and Compounds, 2018
The microstructure, martensitic transformation behaviour, mechanical and strain recovery characteristics of the sintered Ti-Ni-Hf alloy composites reinforced by hybrid particles were investigated systematically, which had an instructive significance on ...
Xiaoyang Yi, G. Wen, K. Sun, Weihong Gao, Hai-zhen Wang, B. Sun, Xianglong Meng, W. Cai, Liancheng Zhao   +8 more
semanticscholar   +1 more source

Ultra-high temperature multi-component shape memory alloys

Scripta Materialia, 2019
Abstract This paper presents martensitic transformation characteristics of selected multi-component (Ni,Pd) 50 (Ti,Hf,Zr) 50 alloys, with an emphasis on superelasticity and thermal actuation behavior. We report, for the first time, austenite finish temperatures beyond 700 °C in NiTi-based high temperature shape memory alloys without the presence of ...
Demircan Canadinc, William Trehern, Ji Ma, Ibrahim Karaman, Fanping Sun, Zaffir Chaudhry   +5 more
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High Temperature Shape Memory Alloys Problems and Prospects

Journal of Intelligent Material Systems and Structures, 2006
In this article, a review of the existing high temperature shape memory alloy (HTSMA) systems is given. Certain crucial disadvantages general to all HTSMAs and related to structural mechanisms of the martensitic transformation (MT) taking place at elevated temperatures are described. The perspectives of the HTSMA's application are also discussed.
G. S. Firstov, J. Van Humbeeck, Yu. N. Koval   +2 more
openaire   +1 more source

High temperature shape memory behavior of Ni47.3Ti29.7Hf20Pd3 alloys

Intermetallics, 2019
Abstract The shape memory properties of Ni47.3Ti29.7Hf20Pd3 alloys were investigated through stress-free thermal cycling, constant-stress thermal cycling and constant-temperature stress cycling experiments. The alloys showed reversible phase transformations above 180 °C, which makes them suitable for high temperature shape memory applications ...
ACAR, EMRE, Karaca, Haluk E., Toker, Guher P., Kurkcu, Harun   +3 more
openaire   +2 more sources

Internal friction in Ti29.7Ni50.3Hf20 alloy with high temperature shape memory effect

, 2020
Martensitic transformation of Ti29.7Ni50.3Hf20 high temperature shape memory alloy was investigated by subresonance internal friction measurements using forced bending vibrations with frequency from 0.1 to 3 Hz.
A. Shuitcev, Li Li, G. Markova, I. Golovin, Y. Tong   +4 more
semanticscholar   +1 more source

TiAu and TiPt high temperature shape memory alloys

Proceedings of 2014 11th International Bhurban Conference on Applied Sciences & Technology (IBCAST) Islamabad, Pakistan, 14th - 18th January, 2014, 2014
Equiatomic TiAu and TiPt exhibit thermo-elastic martensitic phase transformation at high temperature. Phase transformation temperatures of TiPt (Af=1057°C) are about 400°C higher than TiAu (Af=624°C). However TiAu and TiPt exhibit partial shape memory effect and very low strength (e.g. ~120MPa for TiAu and ~20MPa for TiPt) in B2 phase region.
Abdul Wadood, Yoko Yamabe-Mitarai
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Multi-stage martensitic transformation behaviors and microstructural characteristics of Ti-Ni-Hf high temperature shape memory alloy powders

Journal of Alloys and Compounds, 2019
An abnormal multi-stage martensitic transformation was observed in the Ti-49Ni-15Hf (at.%) alloy powders fabricated by the plasma rotating electrode process, which were largely dependent on the particle size.
Xiaoyang Yi, Xianglong Meng, W. Cai, Liancheng Zhao   +3 more
semanticscholar   +1 more source

High-Temperature Cu-Al-Nb Shape Memory Alloys

Materials Science Forum, 2000
Recently a great interest is focused on shape memory alloys, for high temperature applications. The studied Cu-Al-Nb alloys contain from 0.27 to 7.86 wt % Nb and exhibit the M s temperature of 300 °C. These alloys are characterised by exceptional high plasticity and shape recovery.
Henryk Morawiec, J. Lel'tko, Yu. Koval, V. Kolomytsev   +3 more
openaire   +1 more source