Microstructural features of the hydrogenation process in Ti grade 2

Domizzi, G.; Luppo, M.I.; Vigna, G.

doi:10.1016/j.jallcom.2005.09.093

Cited by 8 publications

(9 citation statements)

References 5 publications

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“…The hydrogen absorption rate is larger than the desorption rate with increasing temperature leading to the decreasing trend of hydrogen pressure. Compared with those in literatures [23,24], the starting temperature of hydrogen absorption in porous Ti6Al4V alloys is lower than that in dense Ti6Al4V alloys but higher than that in Ti6Al4V powders. When the temperature is above 823 K, the pressure increases again with increasing temperature, as section CD shown in Fig.…”

Section: Hydrogen Absorption Curvecontrasting

confidence: 68%

Hydrogen absorption kinetics of porous Ti6Al4V alloys

Guo

Hou

Xue-ping

2009

Journal of Alloys and Compounds

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Section: Hydrogen Absorption Curvecontrasting

confidence: 68%

Hydrogen absorption kinetics of porous Ti6Al4V alloys

Guo

Hou

Xue-ping

2009

Journal of Alloys and Compounds

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“…Solute hydrogen and hydride phase implications on the plasticity of zirconium and titanium alloys: a review and some recent advances E. Conforto 1 , I. Guillot 2 In this contribution, we propose a review of the possible implications of hydrogen on mechanical behaviour of Zr and Ti alloys with emphasis on the mechanisms of plasticity and strain hardening. Recent advances on the impact of oxygen and hydrogen on the activation volume show that oxygen content hinders creep but hydrogen partially screens this effect.…”

mentioning

confidence: 99%

Solute hydrogen and hydride phase implications on the plasticity of zirconium and titanium alloys: a review and some recent advances

Conforto

Guillot

Feaugas

2017

Phil. Trans. R. Soc. A.

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In this contribution, we propose a review of the possible implications of hydrogen on mechanical behaviour of Zr and Ti alloys with emphasis on the mechanisms of plasticity and strain hardening. Recent advances on the impact of oxygen and hydrogen on the activation volume show that oxygen content hinders creep but hydrogen partially screens this effect. Both aspects are discussed in terms of a locking-unlocking model of the screw dislocation mobility in prismatic slip. Additionally, possible extension of this behaviour is suggested for the [Formula: see text] pyramidal slip. The low hydrogen solubility in both Zr and Ti leads in many cases to hydride precipitation. The nature of these phases depends on the hydrogen content and can show crystallographic orientation relationships with the hexagonal compact structure of the alloys. Some advances on the thermal stability of these phases are illustrated and discussed in relation with the deepening of the misfit dislocations. Under tensile loading, we showed that hydrides enhance the hardening process in relation with internal stress due to strain incompatibilities between the Zr and Ti matrix and hydride phases. Different plastic yielding processes of hydrides were identified, which progressively reduce these strain incompatibilities.This article is part of the themed issue 'The challenges of hydrogen and metals'.

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“…7. δ hydride is formed between 973 and 1123 K, corresponding to the phase transformations of β→β+δ in the hydrogen absorption process, β→α+δ and α→α+δ in the cooling process [22]. Martensite transformation occurs at 1073 and 1123 K. It is because the cooling rate is larger at a higher temperature during cooling in the furnace, and hydrogen in TA15 alloy decreases the starting temperature and the critical cooling rate of martensite transformation [23].…”

Section: Microstructures and Phase Transformationsmentioning

confidence: 99%

Hydrogen absorption behavior of TA15 alloy

Xue-ping

Zhang

Guo

et al. 2011

Int J Miner Metall Mater

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The hydrogen absorption kinetics of TA15 titanium alloy at 973-1123 K was studied using a tube-type hydrogen treatment furnace. The hydrogen absorption kinetic curves obtained were analyzed according to a series of mechanism equations to reveal the kinetic parameters and mechanism of the hydrogen absorption process. The results show that both the hydrogen absorption rate and the equilibrium hydrogen pressure increase and the time to reach equilibrium is shortened with increasing temperature. It is found that only the second hydrogen absorption period exists in the hydrogen absorption process of TA15 alloy between 973 and 1123 K, and the activation energy is 54.889 kJ/mol for hydrogen absorption. X-ray diffraction (XRD) and scanning electron microscopy (SEM) results demonstrate that δ hydride forms between 973 and 1123 K, and β phase decreases with the increase of temperature. Orthorhombic α" martensite is generated at 1073-1123 K, and their amount increases with increasing temperature.

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Microstructural features of the hydrogenation process in Ti grade 2

Cited by 8 publications

References 5 publications

Hydrogen absorption kinetics of porous Ti6Al4V alloys

Hydrogen absorption kinetics of porous Ti6Al4V alloys

Solute hydrogen and hydride phase implications on the plasticity of zirconium and titanium alloys: a review and some recent advances

Hydrogen absorption behavior of TA15 alloy

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