Constitutive model for elevated temperature flow stress of Ti–6Al–4V alloy considering the effect of work softening

Fang Qiang; Wang Yin; Yin Jingjing

doi:10.7513/j.issn.1004-7638.2021.04.008

Volume 42 Issue 4

Aug. 2021

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Article Navigation > IRON STEEL VANADIUM TITANIUM > 2021 > 42(4): 47-51, 72

Fang Qiang, Wang Yin, Yin Jingjing. Constitutive model for elevated temperature flow stress of Ti–6Al–4V alloy considering the effect of work softening[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 47-51, 72. doi: 10.7513/j.issn.1004-7638.2021.04.008

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Fang Qiang, Wang Yin, Yin Jingjing. Constitutive model for elevated temperature flow stress of Ti–6Al–4V alloy considering the effect of work softening[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 47-51, 72. doi: 10.7513/j.issn.1004-7638.2021.04.008

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Constitutive model for elevated temperature flow stress of Ti–6Al–4V alloy considering the effect of work softening

doi: 10.7513/j.issn.1004-7638.2021.04.008

State Key Laboratory of Metal Material for Marine Equipment and Application , Anshan 114009, Liaoning, China

Received Date: 2021-06-21
Publish Date: 2021-08-10

Abstract

Abstract

A method for establishing the constitutive model considering the flow softening was proposed. Isothermal uniaxial compression tests were performed on cylindrical specimens of Ti-6Al-4V at 750 ℃ to 950 ℃ and the strain rate of 0.1 s⁻¹to 20 s⁻¹. And the flow softening that the flow stress decreases with the plastic deformation was observed. The steady flow stresses under the severe plastic deformation were obtained by fitting the experimental data via double Voce function. The constitutive equation of the alloy considering the flow softening was acquired using Levenberg-Marquardt non-linear fitting. The parameters of the constitutive equation by Levenberg-Marquardt non-linear fitting have less error than those by the linear least square fitting. The proposed method for obtaining flow stress at high temperatures is able to avoid the influence of stress fluctuation in the early stage of hot deformation, and the high-temperature steady flow stress constitutive model according to the exponential function can be obtained, which will be useful in hot working process development for new metallic materials.
- Ti-6Al-4V,
- flow softening,
- constitutive equation,
- thermocompression simulation

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[1]	Rugg David, Dixon Mark, Burrows Justin. High-temperature application of titanium alloys in gas turbines[J]//Material Life Cycle Opportunities and Threats – an Industrial Perspective. Materials at High Temperatures, 2016, 33 (4−5): 536−541.
[2]	Park Chan Hee, Kim Jeoung Han, Hyun Yong-Taek, et al. The origins of flow softening during high-temperature deformation of a Ti–6Al–4V alloy with a lamellar microstructure[J]. Journal of Alloys and Compounds, 2014,582:126−129. doi: 10.1016/j.jallcom.2013.08.041
[3]	Bai Q, Lin J, Dean T A, et al. Modelling of dominant softening mechanisms for Ti-6Al-4V in steady state hot forming conditions[J]. Materials Science and Engineering: A, 2013,559:352−358. doi: 10.1016/j.msea.2012.08.110
[4]	Alabort E, Putman D, Reed R C. Superplasticity in Ti–6Al–4V: Characterisation, modelling and applications[J]. Acta Materialia, 2015,95:428−442. doi: 10.1016/j.actamat.2015.04.056
[5]	Lu Jiapeng, Chen Jianbin, Fang Qihong, et al. Finite element simulation for Ti-6Al-4V alloy deformation near the exit of orthogonal cutting[J]. The International Journal of Advanced Manufacturing Technology, 2016,85(9−12):2377−2388. doi: 10.1007/s00170-015-8077-z
[6]	Bennett, Christopher J, Sun Wei. Optimisation of material properties for the modelling of large deformation manufacturing processes using a finite element model of the gleeble compression test[J]. The Journal of Strain Analysis for Engineering Design, 2014,49(6):429−436. doi: 10.1177/0309324713520310
[7]	Carsi Manuel, Bartolome M Jesús, Rieiro Ignacio, et al. The effect of heterogeneous deformation on the hot deformation of WE54 magnesium alloy[J]. Materials & Design, 2014,58:30−35.
[8]	Hu H E, Wang X Y, Deng L. Comparative study of hot-processing maps for 6061 aluminium alloy constructed from power constitutive equation and hyperbolic sine constitutive Equation[J]. Materials Science and Technology, 2014,30(11):1321−1327. doi: 10.1179/1743284714Y.0000000569
[9]	Li X W, Lu M X, Sha Ai X, et al. The tensile deformation behavior of Ti–3Al–4.5V–5Mo titanium alloy[J]. Materials Science and Engineering: A, 2008,490(1−2):193−197. doi: 10.1016/j.msea.2008.01.086
[10]	Gronostajski Z. The constitutive equations for FEM analysis[J]. Journal of Materials Processing Technology, 2000,106(1−3):40−44. doi: 10.1016/S0924-0136(00)00635-X
[11]	Gan Chunlei, Zheng Kaihong, Qi Wenjun, et al. Constitutive equations for high temperature flow stress prediction of 6063 Al alloy considering compensation of strain[J]. Transactions of Nonferrous Metals Society of China, 2014,24(11):3486−3491. doi: 10.1016/S1003-6326(14)63492-0
[12]	Moré Jorge J. The levenberg-marquardt algorithm: Implementation and theory[M]//Numerical Analysis. Springer, 1978: 105−116.

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