Kinetics of nitriding of titanium alloys at 1173�K

1984 ◽  
Vol 19 (6) ◽  
pp. 511-513 ◽  
Author(s):  
V. N. Fedirko ◽  
I. N. Pogrelyuk
Keyword(s):  
Titanium Alloys ◽  
Kinetics Of

The Ordered Phase Formation in Ti-Al-Ga Alloys

1970 ◽  
Vol 28 ◽  
pp. 440-441
Author(s):  
Shiro Fujishiro ◽  
Harold L. Gegel
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Titanium Alloys ◽  
Growth Kinetics ◽  
Stoichiometric Composition ◽  
Good Potential ◽  
Alpha Titanium ◽  
Cold Rolled ◽  
Kinetics Of ◽  
Thermal Stability Of

Ordered-alpha titanium alloys having a DO19 type structure have good potential for high temperature (600°C) applications, due to the thermal stability of the ordered phase and the inherent resistance to recrystallization of these alloys. Five different Ti-Al-Ga alloys consisting of equal atomic percents of aluminum and gallium solute additions up to the stoichiometric composition, Ti3(Al, Ga), were used to study the growth kinetics of the ordered phase and the nature of its interface.The alloys were homogenized in the beta region in a vacuum of about 5×10-7 torr, furnace cooled; reheated in air to 50°C below the alpha transus for hot working. The alloys were subsequently acid cleaned, annealed in vacuo, and cold rolled to about. 050 inch prior to additional homogenization

Efficiency of Microstructure Refinement in Ti-Based Alloys

2021 ◽  
Vol 1016 ◽  
pp. 1753-1758
Author(s):  
Sergey Zherebtsov ◽  
Nikita Stepanov ◽  
Gennady Salishchev
Keyword(s):  
Plastic Deformation ◽  
Chemical Composition ◽  
Titanium Alloys ◽  
Microstructure Evolution ◽  
Large Plastic Deformation ◽  
Two Phase ◽  
Microstructure Refinement ◽  
Kinetics Of ◽  
Rate Type ◽  
Lamellar Type

The influence of various factors on the efficiency of microstructure refinement in two-phase titanium alloys with respect to a well-known Ti-6Al-4V alloy was discussed. The kinetics of microstructure evolution in titanium alloys with a lamellar type α/β microstructure during large plastic deformation depends mainly on temperature and strain rate, type of the initial microstructure, thickness of the α lamellae, path of deformation and chemical composition. Each parameter should be controlled to provide the most efficient microstructure refinement during conventional metalforming methods.

Effects of solute oxygen on kinetics of diffusionless isothermal ω transformation in β-titanium alloys

2020 ◽  
Vol 188 ◽  
pp. 88-91
Author(s):  
Norihiko L. Okamoto ◽  
Shuhei Kasatani ◽  
Martin Luckabauer ◽  
Masakazu Tane ◽  
Tetsu Ichitsubo
Keyword(s):  
Titanium Alloys ◽  
Kinetics Of

Production, Properties and Application of Ultrafine-Grained Titanium Alloys

2016 ◽  
Vol 838-839 ◽  
pp. 294-301 ◽  
Author(s):  
Sergey Zherebtsov ◽  
Gennady Salishchev
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Titanium Alloys ◽  
Structure Formation ◽  
Temperature Interval ◽  
Two Phase ◽  
Homogeneous Microstructure ◽  
Wide Temperature Interval ◽  
Ultrafine Grained ◽  
Kinetics Of

Some features ofstructure, way of production and mechanical properties of titanium andtwo-phase titanium alloys with ultrafine-grained (UFG) microstructure werediscussed. Various methods of UFG structure formation was considered andoptimal conditions for attaining of a homogeneous microstructure with thesmallest grain size were determined. The kinetics of microstructure evolutionin titanium and two-phase titanium alloys during large (severe) plasticdeformation in a wide temperature interval and the mechanisms of ultrafinegrain formation were analyzed. The influence of grain size on static mechanicalproperties was determined. Significantly reduced temperatures of superplasticforming of the UFG conditions were shown. Some examples of practical applicationsof the UFG two-phase titanium alloys were discussed.

Kinetics of Microstructure Refinement in Titanium Alloys during Deformation

2016 ◽  
Vol 879 ◽  
pp. 2280-2285
Author(s):  
Sergey Zherebtsov ◽  
Maxim Ozerov ◽  
Margarita Kimova ◽  
Gennady Salishchev
Keyword(s):  
Titanium Alloys ◽  
Microstructure Evolution ◽  
Deformation Behavior ◽  
Deformation Twinning ◽  
Commercial Purity ◽  
Two Phase ◽  
Microstructure Refinement ◽  
Commercial Purity Titanium ◽  
Interphase Boundaries ◽  
Kinetics Of

The effect of various factors on the kinetics of microstructure evolution in commercial-purity titanium and two-phase Ti-6Al-4V alloy during deformation was studied. The kinetics of microstructure refinement can be raised via intensification of deformation twinning. In two-phase titanium alloys the kinetics of spheroidization can be increased considerably by decrease in the thickness of initial α lamellae. The influence of interphase boundaries energy on deformation behavior was discussed with respect to Ti-6Al-4V and Ti/TiB alloys.

Analysis of the Microstructure, Phase Composition, and Oxidation Kinetics of Heat-Resistant Titanium Alloys with Gadolinium

2020 ◽  
Vol 121 (4) ◽  
pp. 359-366
Author(s):  
A. A. Popov ◽  
M. O. Leder ◽  
M. C. Karabanalov ◽  
E. N. Popova ◽  
I. V. Narygina
Keyword(s):  
Phase Composition ◽  
Titanium Alloys ◽  
Oxidation Kinetics ◽  
Heat Resistant ◽  
Kinetics Of

Modeling of β→α Transformation in Complex Titanium Alloys

2011 ◽  
Vol 172-174 ◽  
pp. 1044-1049 ◽  
Author(s):  
Paolo Di Napoli ◽  
Benoît Appolaire ◽  
Elisabeth Aeby Gautier ◽  
Adeline Bénéteau
Keyword(s):  
Titanium Alloys ◽  
Phase Field ◽  
Nucleation And Growth ◽  
Heat Treatments ◽  
Β Phase ◽  
Growth Laws ◽  
Kinetics Of

A model has been developed which is able to predict the kinetics of β → α transformation in industrial multicomponent titanium alloys during complex heat treatments. It isbased on (i) analytical nucleation and growth laws based on simple geometric representationsof the di erent morphologies commonly observed in these alloys; (ii) the assumption of localequilibrium at interfaces, handled within the CalPhaD framework; (iii) averaged solute balancesin each morphology. The potentialities of the model will be demonstrated on the Ti17 industrialalloy upon isothermal holdings and cooling from the β phase field.

Sign in / Sign up

Export Citation Format

Share Document