Journal ArticleDOI
Modeling the High Temperature Deformation Behaviour of a near Alpha Titanium Alloy with Bi-Modal Microstructure
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The high temperature deformation behavior of near alpha titanium alloy IMI834 with a bimodal microstructure has been evaluated by carrying out isothermal compression tests over a range of temperature and strain rate as discussed by the authors.Abstract:
The high temperature deformation behaviour of near alpha titanium alloy IMI834 with a bimodal microstructure has been evaluated by carrying out isothermal compression tests over a range of temperature and strain rate The optimum thermomechanical processing (TMP) parameters ie, temperature, strain rate that can be used to produce various aeroengine components were identified using dynamic materials modeling (DMM) Using kinetic analysis, a unified constitutive equation that describes the deformation behavior of the material in the selected temperature - strain rate regime has been established and the deformation mechanisms operating in the material were identifiedread more
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Processing map-microstructure evolution correlation of hot compressed near alpha titanium alloy (TiHy 600)
TL;DR: In this article, the hot deformation behavior of TiHy 600 alloy is characterized on the basis of flow stress variation with true stress-true strain curves at different strain rates ranging from 10−3 s−1 to 10−s−1, with high deformation temperatures ranging from 900°C to 1050°C, with maximum engineering strain up to 50%.
Journal ArticleDOI
Hot working and geometric dynamic recrystallisation behaviour of a near-α titanium alloy with acicular microstructure
TL;DR: In this article, the hot working behavior of near-α titanium alloy TITAN 29A with an acicular starting microstructure was evaluated by carrying out hot compression tests over a range of temperatures (850-1060°C) and strain rates (3×10−4-100/s).
Journal ArticleDOI
Flow behavior modeling of IMI834 titanium alloy during hot tensile deformation
TL;DR: In this paper, a proper constitutive model was developed to predict the hot tensile flow behavior of IMI834 titanium alloy in α+β region, and the results showed that the activation energies for hot tension deformation were in the range of 519-557 kJ/mol at different strain values.
Journal ArticleDOI
On the optimization of temperature and cooling rate to maximize strength and ductility of near α titanium alloy IMI 834
TL;DR: In this article, the effect of solution treatment temperature and cooling rate on the microstructure and room temperature tensile properties of the alloy has been evaluated and reported by using desirability function approach.
Journal ArticleDOI
Processing map for a cast and homogenized near alpha titanium alloy
TL;DR: In this article, the high temperature deformation behavior of cast and homogenised near α titanium alloy Titan 29A (M/s MIDHANI, India) equivalent to IMI 834 (m/s TIMET, UK) was studied towards developing a processing map.
References
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Journal ArticleDOI
Modeling of dynamic material behavior in hot deformation: Forging of Ti-6242
Y. V. R. K. Prasad,Y. V. R. K. Prasad,H. L. Gegel,S. M. Doraivelu,J. C. Malas,J. T. Morgan,K. A. Lark,D. R. Barker +7 more
TL;DR: In this article, a new method of modeling material behavior which accounts for the dynamic metallurgical processes occurring during hot deformation is presented, which considers the workpiece as a dissipator of power in the total processing system and evaluates the dissipated power co-contentJ = ∫o σ e ⋅dσ from the constitutive equation relating the strain rate (e) to the flow stress (σ).
Journal ArticleDOI
Strength and structure under hot-working conditions
TL;DR: The main feature of hot working is that extremely large strains are applied to materials at high rates of strain at temperatures above ∼ 0.6Tm, where Tm is the melting temperature in degrees Kelvin this article.
Journal ArticleDOI
Hot working behavior of near-α alloy IMI834
TL;DR: In this paper, the flow stress behavior of near-α alloy IMI834 was investigated by compression testing under isothermal hot working conditions of varying temperature and strain rates up to a true strain of 0.8.