Buscar
Mostrando ítems 31-40 de 67
Efeito do treinamento por ciclagem pseudoelástica nas propriedades mecânicas e funcionais de uma liga de níquel-titânio
(Universidade Federal de Minas GeraisUFMG, 2016-04-29)
The use of nickel-titanium alloys in devices that undergo thermal and/or mechanical cycling while in service has been very common. For such devices to perform the desired function successfully, they must present functional ...
Efeito do nitrogênio e do cobre na formação da martensita em aços inoxidáveis austeníticos e sua influência sobre o fenômeno de delayed cracking
(Universidade Federal de Minas GeraisUFMG, 2008-04-11)
The influence of strain induced martensite, the residual stresses in redrawn cup edges and the degree of cold work on the susceptibility to Delayed Cracking Phenomenon of austenitic stainless steels were investigated. Four ...
Efeito da laminação criogênica na transformação de ferrita em austenita induzida por deformação em aço inoxidável superdúplex
(Centro Universitário FEI, São Bernardo do Campo, 2021)
Trabalhos anteriores realizados pelo grupo de pesquisas que se insere esse trabalho indicam que a aplicação de deformação plástica a frio em aços inoxidáveis dúplex leva a redução da fração da ferrita presente, evidenciando ...
Superelastic behavior and damping capacity of CuAlBe alloys
(ELSEVIER, 2006-03-15)
Shape memory alloys (SMAs) showing the superelastic effect, dissipate energy through hysteretic cycles up to large strain amplitudes, without remnant strains after unloading. This effect is associated with a reversible ...
Efecto de la microestructura en la deformación y fractura de aceros de fase dual
(Universidad Nacional de ColombiaBogotá - Ingeniería - Doctorado en Ingeniería - Ciencia y Tecnología de MaterialesFacultad de IngenieríaBogotá, ColombiaUniversidad Nacional de Colombia - Sede Bogotá, 2023)
Esta investigación tiene como objetivo evaluar la evolución del daño y los mecanismos de fractura microestructurales asociados a ensayos de tracción uniaxial (UTT), uniaxial cíclica (CTT), propagación de grietas y energía ...
Effect of Variable Amplitude Blocks’ Ordering on the Functional Fatigue of Superelastic NiTi Wires
(Springer, 2017-11-03)
Accumulation of superelastic cycles in NiTi uniaxial element generates changes on the stress–strain response. Basically, there is an uneven drop of martensitic transformation stress plateaus and an increase of residual ...
Effect of high-energy ball-milling on the magnetostructural properties of a Ni45Co5Mn35Sn15 alloy
(Elsevier Science SA, 2021-03)
The effect of high-energy ball-milling on the magnetostructural properties of a Ni45Co5Mn35Sn15 alloy in austenitic phase at room temperature has been analyzed by neutron and high-resolution X-ray diffraction. The ball ...
Mechanical and microstructural behavior of a heterogeneous austenitic stainless steel processed by Equal Channel Angular Sheet Extrusion (ECASE)
(Elsevier Science SA, 2020-08)
A sheet-shaped austenitic stainless steel (ASS) was processed by one ECASE pass. In this way, larger deformations were introduced close to the sheet edge vicinities, while the middle zone remained less affected by the ...
Thermomechanical model for evaluation of the superelastic response of NiTi shape memory alloys under dynamic conditions
(IOP Publishing, 2013-01)
The development of a 1-D thermomechanical model for simulating the response of uniaxial superelastic NiTi elements is described. The formulation of the model includes consideration of the dependence of the critical stresses ...