Results 21 to 30 of about 350 (181)

Asimmetrical Pseudoelasticity

open access: yes, 2010
Term "asymmetrical pseudoelasticity" refers to the theory, in which a symmetrical stress tensor and a symmetrical strain tensor are connected by means of an asymmetrical material tensor. An 6-dimensional asymmetrical matrix of elasticity has been constructed that is invariable in relation to orthogonal transformation with a single rotation operator and
Bytev, V. O., Shkutin, L. I.
openaire   +2 more sources

Temperature Dependence of Hysteresis in Pseudoelasticity

open access: yes, 1990
This paper proposes to consider the existence of hystereses in phase transitions as a consequence of interfacial energies. Given such an energy, the size of the hysteresis and its dependence on temperature are then calculated. This paper extends the ideas that were previously described in MULLER [1] and BORNERT [2].
Bornert, Michel, Müller, Ingo
openaire   +3 more sources

Structural transitions in a NiTi alloy: a multistage loading-unload cycle

open access: yesFracture and Structural Integrity, 2013
NiTi shape memory alloys (SMAs) are increasingly used in many engineering and medical applications, because they combine special functional properties, such as shape memory effect and pseudoelasticity, with good mechanical strength and biocompatibility ...
V. Di Cocco, C. Maletta, S. Natali
doaj   +3 more sources

The Effects of Geometric Parameters Under Small and Large Deformations on Dissipative Performance of Shape Memory Alloy Helical Springs [PDF]

open access: yesJournal of Stress Analysis, 2018
This paper presents an investigation into shape memory alloy (SMA) springs considering the effects of geometry changes under small as well as large deformations. Helical springs were fabricated by shape setting of NiTi wires through heat treatment.
Y. Mohammad Hashemi, M. Kadkhodaei
doaj   +1 more source

Functional Behaviour of Cold-Worked and Straight-Annealed NiTi Elements Processed with Ultrashort Laser Cutting

open access: yesMetals, 2022
Among functional materials, quasiequiatomic NiTi alloys are one of the most promising and diffused for some sectors, from the biomedical to aerospace ones.
Carlo Alberto Biffi, Ausonio Tuissi
doaj   +1 more source

Pseudoelastic Behavior of Fe–Al Polycrystals

open access: yesISIJ International, 2010
Pseudoelastic behavior of Fe–Al polycrystals at room temperature was examined focusing on Al concentration, the crystallographic texture and the grain size. Perfect pseudoelasticity derived from the reversible motion of 1/4 ‹111› superpartial dislocations dragging the anti-phase boundaries (APB) took place in Fe–25.0at%Al polycrystals at a total strain
Yasuda, Hiroyuki Y.   +3 more
openaire   +2 more sources

Irradiation-assisted pseudoelasticity in 316L stainless steel through dislocation loop-controlled martensitic phase transformations

open access: yesMaterials Research Letters
We present pseudoelasticity activated by neutron irradiation in 316L austenitic stainless steel. Wrought and powder metallurgy with hot isostatic pressing (PM-HIP) specimens are irradiated to ∼4 displacements per atom at ∼400°C, then nanoindented.
Arya Chatterjee   +4 more
doaj   +1 more source

Cyclic deformation of Ti-Ni alloy used for endovascular device [PDF]

open access: yesE3S Web of Conferences
Has been studied the possibility of using TiNi alloys with shape memory and pseudoelasticity as an implantation material for correction of functional mitral regurgitation endovascular device.
Morozova T.V.
doaj   +1 more source

Optimization of a Pseudoelastic Absorber for Vibration Mitigation

open access: yesProcedia Engineering, 2017
Abstract Dynamic vibration absorbers (DVAs) have received special attention in recent years due to their capability to reduce structural vibrations of a primary structure. In this work, a DVA of the Tuned Mass Damper type based on a Shape Memory Alloy (SMA) element with pseudoelastic behavior is considered.
Piccirillo, Vinã­cius   +2 more
openaire   +2 more sources

A Study of the Effects of Mechanical Alloying Fraction, Solution Treatment Temperature and Pre-Straining Degree on the Structure and Properties of a Powder Metallurgy-Produced FeMnSiCrNi Shape Memory Alloy

open access: yesCrystals
A shape memory alloy with the chemical composition Fe-14Mn-6Si-9Cr-5Ni (mass %) was produced by powder metallurgy (PM) from as-blended powders mixed with mechanically alloyed (MA’ed) powder volumes in amounts of 0, 10 and 20.
Elena Matcovschi   +7 more
doaj   +1 more source

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