A novel constitutive model for Ti–6Al–4V alloy based on dislocation pile-up theory

Tianfeng Zhou; Junjie Wu; Zhiqiang Liang; Jiangtao Che; Yichuan Zhang; Xibin Wang

doi:10.1080/02670836.2017.1295512

A novel constitutive model for Ti–6Al–4V alloy based on dislocation pile-up theory

Tianfeng Zhou, Junjie Wu, Zhiqiang Liang^*, Jiangtao Che, Yichuan Zhang, Xibin Wang

^*Corresponding author for this work

School of Mechanical Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

The mechanical properties of the titanium alloy Ti–6Al–4V, which vary with the specimen size under different temperatures, are studied through the Split Hopkinson Pressure Bar (SHPB) test and the quasi-static tensile test to determine the parameters for the classical Johnson-Cook (JC) constitutive model. Based on the dislocation pile-up theory, the classical JC constitutive model is modified by adding a grain strain term Δσ to consider the influence of grain size. The SHPB and tensile tests are analysed using a finite element method simulation. Compared with the experimental results, the simulation results based on the modified JC model exhibit a much higher calculation accuracy than that of the classical JC model.

Original language	English
Pages (from-to)	1379-1387
Number of pages	9
Journal	Materials Science and Technology
Volume	33
Issue number	11
DOIs	https://doi.org/10.1080/02670836.2017.1295512
Publication status	Published - 24 Jul 2017

Keywords

FEM simulation
SHPB test
Titanium alloy
constitutive model
dislocation pile-up
tensile test

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10.1080/02670836.2017.1295512

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title = "A novel constitutive model for Ti–6Al–4V alloy based on dislocation pile-up theory",

abstract = "The mechanical properties of the titanium alloy Ti–6Al–4V, which vary with the specimen size under different temperatures, are studied through the Split Hopkinson Pressure Bar (SHPB) test and the quasi-static tensile test to determine the parameters for the classical Johnson-Cook (JC) constitutive model. Based on the dislocation pile-up theory, the classical JC constitutive model is modified by adding a grain strain term Δσ to consider the influence of grain size. The SHPB and tensile tests are analysed using a finite element method simulation. Compared with the experimental results, the simulation results based on the modified JC model exhibit a much higher calculation accuracy than that of the classical JC model.",

keywords = "FEM simulation, SHPB test, Titanium alloy, constitutive model, dislocation pile-up, tensile test",

author = "Tianfeng Zhou and Junjie Wu and Zhiqiang Liang and Jiangtao Che and Yichuan Zhang and Xibin Wang",

note = "Publisher Copyright: {\textcopyright} 2017 Institute of Materials, Minerals and Mining.",

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T1 - A novel constitutive model for Ti–6Al–4V alloy based on dislocation pile-up theory

AU - Zhou, Tianfeng

AU - Wu, Junjie

AU - Liang, Zhiqiang

AU - Che, Jiangtao

AU - Zhang, Yichuan

AU - Wang, Xibin

PY - 2017/7/24

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N2 - The mechanical properties of the titanium alloy Ti–6Al–4V, which vary with the specimen size under different temperatures, are studied through the Split Hopkinson Pressure Bar (SHPB) test and the quasi-static tensile test to determine the parameters for the classical Johnson-Cook (JC) constitutive model. Based on the dislocation pile-up theory, the classical JC constitutive model is modified by adding a grain strain term Δσ to consider the influence of grain size. The SHPB and tensile tests are analysed using a finite element method simulation. Compared with the experimental results, the simulation results based on the modified JC model exhibit a much higher calculation accuracy than that of the classical JC model.

AB - The mechanical properties of the titanium alloy Ti–6Al–4V, which vary with the specimen size under different temperatures, are studied through the Split Hopkinson Pressure Bar (SHPB) test and the quasi-static tensile test to determine the parameters for the classical Johnson-Cook (JC) constitutive model. Based on the dislocation pile-up theory, the classical JC constitutive model is modified by adding a grain strain term Δσ to consider the influence of grain size. The SHPB and tensile tests are analysed using a finite element method simulation. Compared with the experimental results, the simulation results based on the modified JC model exhibit a much higher calculation accuracy than that of the classical JC model.

KW - FEM simulation

KW - SHPB test

KW - Titanium alloy

KW - constitutive model

KW - dislocation pile-up

KW - tensile test

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ER -

A novel constitutive model for Ti–6Al–4V alloy based on dislocation pile-up theory

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Keywords

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