Results 41 to 50 of about 74,781 (241)

Significant improvement in the thermal cycling stability of Ni44.8Ti45.8Hf5Cu5 shape memory alloy by high pressure torsion and post-deformation annealing

open access: yesJournal of Materials Research and Technology, 2022
A newly developed quaternary Ni44.8Cu5Ti45.2Hf5 shape memory alloy (SMA) was processed by high-pressure torsion (HPT) for five turns under a pressure of 6 GPa at room temperature and then subjected to post deformation annealing (PDA) at 450 °C for 10 min.
Sadjad Baradari   +5 more
doaj   +1 more source

A corpus-based lexical and grammatical error identification: L2 learners academic writing [PDF]

open access: yes, 2021
Writing in English has never been an easy task to many second language (L2) learners. Many of them perform poorly in their English academic writing where numerous lexical and grammatical errors are found in their report.
Talib, Salleh
core  

The improvement of the shape memory effect of Cu-13.5Al–4Ni high-temperature shape memory alloys through Cr-, Mo-, or V-alloying

open access: yesJournal of Science: Advanced Materials and Devices, 2023
This study presents the effect of small additions of Cr, Mo, or V on the microstructure, crystallographic features of martensitic transformation, and shape memory effect of Cu-13.5Al–4Ni master alloy.
Lipeng Guo   +6 more
doaj   +1 more source

High-temperature superelasticity of Ni50.6Ti24.4Hf25.0 shape memory alloy

open access: yesScripta Materialia, 2015
Changes in transformation temperatures and high-temperature mechanical behavior of the new Ni50.6Ti34.4Hf25.0 alloy were determined after selected aging treatments. Differential scanning calorimetry was used to compare the homogenized, solution-treated and aged specimens for a wide combination of aging temperatures and times.
PATRIARCA, LUCA, Sehitoglu, Huseyin
openaire   +1 more source

A Ti-Zr-Hf-Ni-Nb high-entropy shape memory alloy with an exceptional strength-ductility synergy for high-temperature application

open access: yesMaterials Research Letters
A novel Ti35.16Zr5.86Hf5.86Ni46.87Nb6.25 (at. %) high-entropy shape memory alloy (HESMA) is developed for applications in high-stress, high-temperature environments.
Rui Wang   +7 more
doaj   +1 more source

Effect of Ni-Content on the Transformation Temperatures in NiTi-20 at. % Zr High Temperature Shape Memory Alloys

open access: yesMetals, 2017
The effect of Ni-content on phase transformation behavior of NiTi-20 at. % Zr high temperature shape memory alloy (HTSMA) is investigated over a small composition range, i.e., 49.8, 50.0 and 50.2 at. % Ni, by differential scanning calorimetry (DSC), high-
Matthew Carl   +3 more
doaj   +1 more source

Development of High-Entropy Shape-Memory Alloys: Structure and Properties

open access: yesУспехи физики металлов, 2023
Amongst functional materials, shape-memory alloys occupy a special place. Discovered in the beginning of 1960th in XX century, these alloys attracted quite an attention because of the possibility to restore significant deformation amounts at certain ...
G. S. Firstov, Yu. M. Koval, V. S. Filatova, V. V. Odnosum, G. Gerstein, and H. J. Maier
doaj   +1 more source

Laser Annealing on the Surface Treatment of Thin Super Elastic NiTi Wire [PDF]

open access: yes, 2018
Here the aim of this research is annealing the surface of NiTi wire for shape memory alloy, super-elastic wire by solid state laser beam. The laser surface treatment was carried out on the NiTi wire locally with fast, selective, surface heat treatment ...
Brajer J.   +5 more
core   +1 more source

Precipitation Hardenable High Temperature Shape Memory Alloy [PDF]

open access: yes, 2010
A composition of the invention is a high temperature shape memory alloy having high work output, and is made from (Ni+Pt+Y),Ti(100-x) wherein x is present in a total amount of 49-55 atomic % Pt is present in a total amount of 10-30 atomic %, Y is one or ...
Crombie, Edwin A.   +3 more
core   +1 more source

The determination and evaluation of Nitinol constitutive models for finite element analysis [PDF]

open access: yes, 2007
Superelastic Ni-Ti (Nitinol) is a member of the shape memory alloy (SMA) family of metals. The physical properties of Nitinol are highly dependant on a number of factors, including manufacturing method, subsequent processing, operating temperature, and ...
Ashton, T.R.   +4 more
core   +1 more source

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