Hydrogen absorption study of ti-based alloys performed by melt-spinning

Ribeiro, Rafaella Martins; Lemus, L.F.; Santos, D.S. dos

doi:10.1590/s1516-14392013005000049

Cited by 17 publications

(7 citation statements)

References 18 publications

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“…The VA2/VA3/VA4 treatments involved annealing for respectively 8/16/34 h at 950 K under P ~ 10 −3 Pa. The annealing temperatures were chosen to be higher than the temperature ranges of hydrogen desorption from Ni-Ti alloys reported in the literature [ 17 , 18 , 19 ].…”

Section: Methodsmentioning

confidence: 99%

On the Effect of Hydrogen on the Low-Temperature Elastic and Anelastic Properties of Ni-Ti-Based Alloys

et al. 2017

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Linear and non-linear internal friction and the effective Young’s modulus of a Ni50.8Ti49.2 alloy have been studied after different heat treatments, affecting hydrogen content, over wide ranges of temperatures (13–300 K) and strain amplitudes (10−7–10−4) at frequencies near 90 kHz. It has been shown that the contamination of the alloy by hydrogen strongly affects the internal friction and Young’s modulus of the martensitic phase. Presence of hydrogen gives rise to a non-relaxation internal friction maximum due to a competition of two different temperature-dependent processes. The temperature position and height of the maximum depend strongly on the hydrogen content. We conclude that many of the internal friction peaks, reported earlier for differently treated Ni-Ti-based alloys, had the same origin as the present maximum.

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Section: Methodsmentioning

confidence: 99%

On the Effect of Hydrogen on the Low-Temperature Elastic and Anelastic Properties of Ni-Ti-Based Alloys

et al. 2017

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“…The VA treatment consisted in annealing for 26 h at 950 K under a residual gas pressure P ≈ 10 −3 Pa. The annealing temperature was chosen to be higher than the temperature ranges of hydrogen desorption from Ni-Ti alloys reported in the literature [16][17][18]. Two samples were used for acoustic measurements: one after only the WQ treatment and another one subjected to a combination of the WQ and VA treatments.…”

Section: Methodsmentioning

confidence: 99%

Effect of Hydrogen on the Elastic and Anelastic Properties of the R Phase in Ti50Ni46.1Fe3.9 Alloy

Sapozhnikov

Torrens‐Serra

Cesari

et al. 2017

Metals

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Abstract:The linear and non-linear internal friction, effective Young's modulus, and amplitude-dependent modulus defect of a Ti 50 Ni 46.1 Fe 3.9 alloy have been studied after different heat treatments, affecting hydrogen content, at temperatures of 13-300 K, and frequencies near 90 kHz. It has been shown that the contamination of the alloy by hydrogen gives rise to an internal friction maximum in the R martensitic phase and a complicated pinning stage in the temperature dependence of the effective Young's modulus at temperatures corresponding to the high-temperature side of the maximum. Dehydrogenation of the H-contaminated alloy transforms the internal friction maximum into a plateau and minimizes the pinning stage. The internal friction maximum is associated with a competition of two different temperature-dependent processes affecting the hydrogen concentration in the core regions of twin boundaries. The amplitude-dependent anelasticity of the R phase is also very sensitive to hydrogen content, its temperature dependence reflects the evolution of extended hydrogen atmospheres near twin boundaries.

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“…A marked kinetic improvement achieved by alloying with Ni was demonstrated for TieNi-based alloys, which can absorb a considerable amount of hydrogen at a high temperature of 623 K and a pressure of 4 MPa. TieNi has the AB 2 composition; however, similar to other light metal-based materials, the use of catalysts can improve the undesirable or slow kinetic properties [110,111]. These problems should be overcome for the practical use of this material for hydrogen storage applications [110].…”

Section: Alloyingmentioning

confidence: 99%