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Wednesday, July 29, 2020 | History

2 edition of behaviour of hydrogen in tial and ti3al found in the catalog.

behaviour of hydrogen in tial and ti3al

Wenpeng Zhang

behaviour of hydrogen in tial and ti3al

by Wenpeng Zhang

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  • 8 Currently reading

Published by University of Birmingham in Birmingham .
Written in English


Edition Notes

Thesis (PhD) - University of Birmingham, Department of Metallurgy and Materials.

Statementby Wenpeng Zhang.
The Physical Object
Pagination212 p. :
Number of Pages212
ID Numbers
Open LibraryOL16025439M

  Its hydrogen is produced in an electrolyser - a device that splits water (H2O) into its constituents: hydrogen and oxygen. The machine is located in a . As a first attempt in the development of the ECM process, the corrosion behavior of arc-melted gamma TiAl and alpha 2 Ti3Al was investigated along with pure titanium and aluminum in deaerated and non-deaerated solutions of sulfuric acid, sodium sulfate, and sodium hydroxide.

Summary This chapter contains sections titled: Single‐Phase γ(TiAl) Alloys Deformation Behavior of Single‐Phase γ(Ti3Al) Alloys â/B2 Phase Alloys References. The stability of interfaces in lamellar TiAl (or TiAl/Ti{sub 3}Al laminate composite) by straining at ambient temperatures has been investigated using in-situ staining techniques performed in a transmission electron microscope in order to obtain direct evidence to support the previously proposed creep mechanisms in refined lamellar TiAl based upon the interface sliding in association with the.

In this study, gas atomized powder from the 4th generation TNM alloy, TiAl-4Nb-1MoB (in at.%), was densified and the microstructure was investigated by means of electron microscopy and X-ray diffraction. The sintered microstructure exhibits lamellar α2-Ti3Al /γ-TiAl colonies surrounded by globular γ- and ordered βo-TiAl phase. Abstract. A method based on initiation of dynamic recrystallization (DRX) during hot working has been developed to produce a submicrocrystalline (SMC) structure (d.


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Behaviour of hydrogen in tial and ti3al by Wenpeng Zhang Download PDF EPUB FB2

Hydrogen embrittlement has been observed in the ct2 based alloy TiANb (6). Comparatively, little research has been done on hydrogen behavior in Ti3A1; Rudman et al.

(7,8) have studied hydrogen absorption and desorption behavior in Ti3A1 in the temperature range Cited by: Yamaguchi M., Inui H. () Deformation Behavior of TiAl Compounds with the TiAl/Ti 3 Al Lamellar Microstructure.

In: Liu C.T., Cahn R.W., Sauthoff G. (eds) Ordered Intermetallics — Physical Metallurgy and Mechanical by: 7. Hydrogen bubbles essentially require that hydrogen content exceeds the saturated solubility and that gas cores form and grow.

In this study, the solubility of hydrogen in the Ti–47Al melt is less than 3 at%. For the molten TiAl alloys, the solubility of hydrogen increases with decreasing temperature. Thus, hydrogen cannot be supersaturated in the TiAl melt before by: 7.

Deformation Behavior of Two‐Phase α2 (Ti3Al) + γ (TiAl) Alloys - Gamma Titanium Aluminide Alloys - Wiley Online Library. Gamma Titanium. The behaviour of hydrogen in TiAl and Ti₃Al. By Wenpeng Zhang.

Abstract. EThOS - Electronic Theses Online ServiceGBUnited Kingdo Topics: 13H - Industrial processes, manufacturing processes. Year: OAI identifier: Provided by: OpenGrey Repository. Download PDF: Sorry Author: Wenpeng Zhang. The corrosion behaviour of Ti3Al and Ti3Al–11 at.% Nb was studied and compared to Ti with salt fog spray test and electrochemical methods in NaCl, HCl, H2SO4 and HNO3 solutions.

Hydrogen diffusion, however, is slower. Opposite behaviors can be noticed: hydrogen diffusivity is slower in Ti 3 Al than in TiAl and Ti-hcp systems, even though its solubility (should be/is) higher.

In fine, the flux of hydrogen should be equivalent in TiAl and Ti 3 Al. To explain the differences between the two TiAl systems, it can be noted that the presence of aluminum atoms leads to a significant increase in.

It is well known that Nb addition effectively improves the oxidation resistance of TiAl and Ti3Al. Thus, the effect of Nb on the oxidation behavior of a‐Ti alloys was investigated. It was found that Nb is effective to improve the oxidation resistance of the a phase as well as TiAl and Ti3Al. Phase equilibrium was also investigated in Ti‐Al.

SECTION 1. IDENTIFICATION. Product Name: Titanium Aluminide Ti3Al Product Number: All applicable American Elements product codes, e.g. TI3-ALI, TI3-ALI, TI3-ALI, TI3-ALI CAS #: Relevant identified uses of the substance: Scientific research and development.

The book ‘the behavior of gases’ is designed to make available for use and aid students who are just starting their advance level in chemistry. Compared with TiO2 formed in the untreated TiAl sample, it is clear that D.D. Chen et al., Oxidation behavior of niobized TiAl by plasma surface alloying Nb can increase the activity of Al.

As a result, the combination between Ti and oxygen is weakened and no TiO2 is formed during oxidation in the niobized TiAl alloys.

WS11a2 Deformation of polysynthetically twinned (PST) crystals and PST bicrystals of TiAl at room temperature A. Nakamura, H. Inui, M.H. Oh and M. Yamaguchi Department of Metal Science and Technology, Kyoto University Sakyo-ku, KyotoJapan ABSTRACT We have grown TiAl crystals of a nearly stoichiometric composition composed of a single lamellar grain as well as those composed of.

Nevertheless, theoretical works have addressed the atomic-scale behaviour of oxygen in γ-TiAl. Most of these studies have focused on the mechanisms of oxygen adsorption on the γ-TiAl surfaces. The influence of oxygen on solidification behaviour of cast TiAl-based alloys containing 40–48 at.% of Al was studied.

The microchemistry and morphology of the oxide layer produced on a single phase γ-TiAl alloy (Ti–Al–2Ta at.%) following anneals at and K in low-pressure oxygen and hydrogen.

Phase Behavior of Hydrogen-light- hydrocarbon Systems A. BENHAM, D. KATZ, and R. WILLIAMS Univcrrily of Michigan, Ann Arbor, Michigan The decreasing solubility of hydrogen in hydrocarbons with decreasing temperature continues down to the freezing point of the hydrocarbons, around °F.

This behavior. Summary This chapter contains sections titled: Lamellar Microstructures Deformation Mechanisms, Contrasting Single‐Phase and Two‐Phase Alloys Generation of Dislocations and Mechanical Twins Glide R.

Oxidation resistance of TiAl3, one of the candidates of coating materials for high temperature structural materials such as Ti3Al and TiAl, has been studied. Specimens were prepared by forming TiAl3 in Al/Ti/Al reaction diffusion couples at K and then TiAl3 layer was exposed to air by dissolving Al plate in a 1N NaOH solution.

The obtained TiAl3/Ti/TiAl3 couples were annealed in air in the. Muhammad Jajar Pambudi, Eddy Agus Basuki and Djoko Hadi Prajitno Improving hot corrosion resistance of two phases intermetallic alloy α2-Ti3Al/γ-TiAl with enamel coating / Tan He, Rui Hu, Jie-Ren Yang, Tie-Bang Zhang and Jin-Shan Li, Transition of solidification path in nonequilibrium solidification of Ti–48Al–8Nb.

This research program has examined mechanical behavior and creep of titanium aluminide alloys, both based on Ti3Al and TiAl, with the goal being better understanding of relationships between microstructure and mechanical properties of these intermetallic compound-based alloys.

@article{osti_, title = {Hydride formation in two-phase (Ti[sub 3]Al + TiAl) titanium aluminides by cathodic charging}, author = {Takasaki, Akito and Ojima, Kozo and Taneda, Youji}, abstractNote = {Titanium aluminides have attractive properties at elevated temperatures.

Recently, considerable effort has been directed toward determining the hydrogen susceptibility of Ti[sub 3]Al ([alpha.Anisotropic thermal expansion coefficients of tetragonal γ -TiAl and hexagonal α 2 -Ti3Al phases were calculated using first principles methods. Two approaches with different computational costs and degrees of freedom were proposed.

The predicted values were compared with available experimental data showing that for γ -TiAl, the more computational demanding method with decoupled impact.In the Third NASA Hydrogen Workshop [2], it was reported that two-phase TiAl-base alloys, [7,8] like Ti3Al-alloys, were susceptible to hydrogen embrittlement in high-temperature, high-pressure gaseous hydrogen environments [].

Based on this information, the use of either.