Transformation pseudoelasticity and deformation behavior in a Ti-50.6at%Ni alloy

Miyazaki, S.; Otsuka, Kazuhiro; Suzuki, Yuichi

doi:10.1016/0036-9748(81)90346-x

Cited by 459 publications

(170 citation statements)

References 8 publications

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“…At the higher measurement stress levels, the samples continued to accumulate strain before reaching (within a few minutes) the strain levels marked with black dots. This effect is attributed to the relatively high loading rate which did not allow sufficient time for transformation enthalpy dissipation [11][12][13]. Since the transformation is thermoelastic, a strain is produced in the sample upon equilibrating to ambient temperature.…”

Section: Methodsmentioning

confidence: 99%

Stress-induced martensitic transformations in NiTi and NiTi–TiC composites investigated by neutron diffraction

Vaidyanathan

Bourke

Dunand

1999

Materials Science and Engineering: A

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Superelastic NiTi (51.0 at.% Ni) specimens reinforced with 0, 10 and 20 vol.% TiC particles were deformed under uniaxial compression while neutron diffraction spectra were collected. The experiments yielded in-situ measurements of the thermoelastic stress-induced transformation. The evolution of austenite/martensite phase fractions and of elastic strains in the reinforcing TiC particles and the austenite matrix were obtained by Rietveld refinement [1] during the loading cycle as the austenite transforms to martensite (and its subsequent back transformation during unloading). Phase fractions and strains are discussed in terms of load transfer in composites where the matrix undergoes a stress-induced phase transformation.

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Section: Methodsmentioning

confidence: 99%

Stress-induced martensitic transformations in NiTi and NiTi–TiC composites investigated by neutron diffraction

Vaidyanathan

Bourke

Dunand

1999

Materials Science and Engineering: A

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“…1(b). Let c mono be the convex hull of the monoclinic variants and let orth be the convex hull of a ®ctitious cubic±orthorhombic transformation obtained by setting e = 0 in e (1) , F F F, e (12) . We can show that orth & mono & c mono [1,32].…”

Section: Recoverable Strain In a Single Crystalmentioning

confidence: 99%

“…Finally, Miyazaki et al [12] have reported that drawn wires of Ti±50.6Ni alloy can recover around 6% tensile strain although there is no additional information to show those wires have such h110i or h111i ®ber texture.…”

Section: Other Texturesmentioning

confidence: 99%

The influence of texture on the shape-memory effect in polycrystals

1998

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AbstractÐA model is developed to show that texture is a crucial factor in determining the shape-memory e ect in polycrystals. In particular, it is established that texture is the reason why the strains recoverable in Ti±Ni are so much larger than those in Cu-based shape-memory alloys in rolled, extruded and drawn specimens. Further, it is shown that both these materials recover relatively small strains in sputter-deposited thin ®lms due to unfavorable texture. It is found that even the qualitative behavior of combined tension± torsion can critically depend on the texture. The results are in good agreement with experimental observations. Finally, textures are suggested for improved shape-memory e ect. #

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“…1 denote these stages during deformation. Several investigations [1,[5][6][7][8][9][10][11][12][13][14] have been carried out to clarify the nature of each stage in Ni-Ti and the results of these studies are summarized in the following. Stage 1 is the initial linear elastic region.…”

Section: Introductionmentioning

confidence: 99%