Mechanical Behavior of TC11 Titanium Alloy during deformation at High Temperature
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The flow stress evolution of TC11 titanium alloy during deformation at high temperature is studied in the temperature range of 760℃~960℃,strain rate range of 0.001~5.0s~(-1) and deformation degree of 50% on Gleebleo 1500 thermo-mechanical simulator.Based on the analysis of effect of deformation temperature,deformation degree and strain rate on the flow stress,the constitutive relational model of TC11 titanium alloy is obtained by regression of experimental data according to the Arrhenius equation.Thus,an important computational model for numerical simulation of TC11 titanium alloy during deformation at high temperature is provided.Keywords:
Titanium alloy
Flow stress
Atmospheric temperature range
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The high temperature flow behavior of 7A52 aluminum alloy during high temperature plastic deformation was studied by isothermal compression of cylindrical specimens using Gleeble-1500 thermal simulation machine.The results show that the flow stress decreases with the increase of deformation temperature and increases with the increase of strain rate.The flow stress equation of 7A52 alloy during temperature deformation can be represented by a formula.The better hot deformation processing can be designed at 400℃-420℃.
Flow stress
Isothermal process
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Deformation behavior of high temperature deformation of TA15 alloy has been carried out according to the experiment of isothermal compression.The experimental results show that the strain rate affect the peak stress and the steady stress weakly when the deformation temperature is low and strongly when the temperature is high.Meanwhile,the constitutive equation on flow stress of TA15 alloy in high temperature deformation was presented.The calculated results are in good agreement with the experimental results.
Titanium alloy
Isothermal process
Flow stress
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Hot deformation behavior of Ti14 alloy was investigated on a Gleedle1500 simulator or with strain rate of 5×10-3-5 s-1 and deformation temperature of 1273-1423 K.The relationship between flow stress and deformation temperature as well as strain rate were analyzed and the deformation activation energy were calculated.The results show that the alloy expresses obvious yield point,the strain rate and deformation temperature have strong effects on the flow stress.The flow stress decreases with increasing of deformation temperature and decreasing of strain rate,which is considered to be associated with the decomposing effects of the liquid of different fraction and distribution on α-Ti matrix.
Flow stress
Portevin–Le Chatelier effect
Strain (injury)
Matrix (chemical analysis)
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Compressive deformation behavior of Mg-5Sn-2.5Pbmagnesium alloy was investigated at the temperature range from 250 to 450°C , strain rate range from 0.001 to 10s -1 and the maximum deformation degree of 60% on Gleeble-3500 thermal simulator.The constitutive equations were established by taking peak stresses as the function of temperatures and strain rates.The results show that the flow stress significantly affected by deformation temperature and strain rate, and the flow stress decreases with the increase of deformation temperature and the decrease of strain rate.The deformation activation energy and stress exponent were evaluated by the hyperbolic-sine mathematics model and the hot deformation constitutive equation was established.
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The hot deformation behavior of Mg-3.5Zn-0.6Y-0.5Zr alloy was investigated by compressive tests of strain rate ranges of 0.002~1 s-1 and deformation temperature ranges of 300~450 °C using a Gleeble 1500D thermal simulator. The flow stresses in different deformation conditions are measured. The results show that flow stress is significantly affected by both deformation temperature and strain rate, the flow stress increases with increase in strain rate and decreases in deformation temperature during the hot compression process. The constitutive equation established on the basis of data of activation energy and stress exponent is a hyperbolic sine function.
Flow stress
Cite
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Flow stress
Isothermal process
Adiabatic shear band
Titanium alloy
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Citations (44)
Dynamic thermal simulation technology was introduced to a high-temperature compression deformation test to investigate rheological behavior of 5083 aluminum alloy at elevated temperature and establish a high temperature flow stress model. Results show that flow stress is apparently influenced by both strain rate and deformation temperature,as the flow stress decreases with the increased temperature,while increases with the raise of strain rate. An apparent dynamic softening can be observed at a high strain rate.
Flow stress
Strain (injury)
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Dynamic Recrystallization
Isothermal process
Flow stress
Strain (injury)
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Objective To study the influence of thermomechanical parameters such as deformation temperature and strain rate on the flow stress of titanium alloy TC21 and to construct the constitutive equation of titanium alloy TC21. Methods Isothermal constant strain rate compression experiment of titanium alloy TC21 was carried out with a hot working simulator,and the true stress- strain curves were analyzed. Results The flow stress data of the alloy in the temperature range of760 ~ 920 ℃ and the strain rate range of 0. 001 ~ 10 s- 1were obtained,and the constitutive equation of the titanium alloy was constructed by Multiple Linear Regression. Conclusion Error analysis showed that the constitutive equation had high precision,which could provide theoretical basis for numerical simulation and determination of the reasonable thermomechanical parameters during the forging process of titanium alloy TC21.
Titanium alloy
Flow stress
Isothermal process
Strain (injury)
Atmospheric temperature range
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According to compressive test date, relationship between flow stress, temperature, strain rate and strain is studied through single and multiple regression, and constitutive equation is researched. The results show the relationship between flow stress and stain is applied to hyperbolic sine equation in the hot compressive deformation of Ti-6Al-4V-rare earth titanium alloy. Relationship between logarithmic hyperbolic sine of its flow stress and reciprocal of absolute temperatures is liner, and hot compressive deformation is controlled by activation energy.
Flow stress
Titanium alloy
Strain (injury)
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