Results 41 to 50 of about 6,618 (297)

A constitutive model for cyclic actuation of high-temperature shape memory alloys [PDF]

, 2014
In this work, a three dimensional constitutive model for High Temperature Shape Memory Alloys (HTSMAs) is presented. To describe the evolution of the cyclic actuation behavior of such alloys, viscoplastic mechanisms and transformation induced plasticity ...
CHEMISKY, Yves, CHATZIGEORGIOU, George, PARIKSHITH, Kumar, Chatzigeorgiou, Georges, LAGOUDAS, Dimitris   +4 more
core   +1 more source

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

Journal 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, Natalia Resnina, Sergey Belyaev, Egor Prokofiev, Ruslan Z. Valiev, Mahmoud Nili-Ahmadabadi   +5 more
doaj   +1 more source

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

, 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 ...
Dempster, W.M., McCummiskey, E., Nash, D.H., Ashton, T.R., Stevenson, D.G.   +4 more
core   +1 more source

A high-entropy high-temperature shape memory alloy with large and complete superelastic recovery

Materials Research Letters, 2021
High-temperature shape memory alloys (HTSMAs) show enormous potential for applications as energy conversion devices, actuators and sensors in automotive, aerospace, and energy exploration industries, but they suffer from strength decrease and ...
Shaohui Li, Daoyong Cong, Zhen Chen, Shengwei Li, Chao Song, Yuxian Cao, Zhihua Nie, Yandong Wang   +7 more
doaj   +1 more source

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

Journal 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, Feng Chen, Shuaishuai Chen, Yixiong Huang, Jinbin Zhang, Cuiping Wang, Shuiyuan Yang   +6 more
doaj   +1 more source

Structure and thermomechanics of selective laser melted nickel-titanium [PDF]

, 2015
NiTi has been established for applications in load-bearing implants due to its mechanical properties, which mimic the characteristics of bone better than any other known biocompatible metal or metallic alloy.
Bormann, Anna Therese
core   +1 more source

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

Materials 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, Zhenhua Wang, Haiyang Liu, Yinyang Wang, Qing Wang, Xiaona Li, Tongming Wang, Peter K. Liaw   +7 more
doaj   +1 more source

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

Metals, 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, Jesse D. Smith, Brian Van Doren, Marcus L. Young   +3 more
doaj   +1 more source

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

Scripta 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

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

Успехи 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