Internal-atate-variable based constitutive modeling for near β Ti-7Mo-3Al-3Nb-3Cr alloy during hot deformation process

Yinghao Wang; Fengbo Han; Hongchao Kou; Jinshan Li

Internal-atate-variable based constitutive modeling for near β Ti-7Mo-3Al-3Nb-3Cr alloy during hot deformation process

Yinghao Wang, Fengbo Han, Hongchao Kou, Jinshan Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

5 Scopus citations

Abstract

A constitutive model using dislocation density rate as an internal state variable has been proposed for hot working of near β titanium alloy. In the constitutive equations, the effects of solution strengthening and dislocation interaction on flow stress were included. Based on the internal-state-variable model, the constitutive relationship of a new near β titanium alloy Ti-7Mo-3Al-3Nb-3Cr (Ti-7333) for high temperature deformation was established. And the model parameters were obtained by the genetic algorithm based objective optimization method. Calculating results show that the average relative difference between the calculated flow stress and the experimental ﬂow stress is about 7.2%. The developed internal-state-variable based constitutive model can efficiently characterize the flow behavior of Ti-7333 alloy.

Original language	English
Pages (from-to)	1883-1887
Number of pages	5
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	44
Issue number	8
State	Published - 1 Aug 2015

Keywords

Constitutive model
Flow stress
Hot deformation
Near β titanium alloy

Cite this

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title = "Internal-atate-variable based constitutive modeling for near β Ti-7Mo-3Al-3Nb-3Cr alloy during hot deformation process",

abstract = "A constitutive model using dislocation density rate as an internal state variable has been proposed for hot working of near β titanium alloy. In the constitutive equations, the effects of solution strengthening and dislocation interaction on flow stress were included. Based on the internal-state-variable model, the constitutive relationship of a new near β titanium alloy Ti-7Mo-3Al-3Nb-3Cr (Ti-7333) for high temperature deformation was established. And the model parameters were obtained by the genetic algorithm based objective optimization method. Calculating results show that the average relative difference between the calculated flow stress and the experimental ﬂow stress is about 7.2%. The developed internal-state-variable based constitutive model can efficiently characterize the flow behavior of Ti-7333 alloy.",

keywords = "Constitutive model, Flow stress, Hot deformation, Near β titanium alloy",

author = "Yinghao Wang and Fengbo Han and Hongchao Kou and Jinshan Li",

year = "2015",

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language = "英语",

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journal = "Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering",

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TY - JOUR

T1 - Internal-atate-variable based constitutive modeling for near β Ti-7Mo-3Al-3Nb-3Cr alloy during hot deformation process

AU - Wang, Yinghao

AU - Han, Fengbo

AU - Kou, Hongchao

AU - Li, Jinshan

PY - 2015/8/1

Y1 - 2015/8/1

N2 - A constitutive model using dislocation density rate as an internal state variable has been proposed for hot working of near β titanium alloy. In the constitutive equations, the effects of solution strengthening and dislocation interaction on flow stress were included. Based on the internal-state-variable model, the constitutive relationship of a new near β titanium alloy Ti-7Mo-3Al-3Nb-3Cr (Ti-7333) for high temperature deformation was established. And the model parameters were obtained by the genetic algorithm based objective optimization method. Calculating results show that the average relative difference between the calculated flow stress and the experimental ﬂow stress is about 7.2%. The developed internal-state-variable based constitutive model can efficiently characterize the flow behavior of Ti-7333 alloy.

AB - A constitutive model using dislocation density rate as an internal state variable has been proposed for hot working of near β titanium alloy. In the constitutive equations, the effects of solution strengthening and dislocation interaction on flow stress were included. Based on the internal-state-variable model, the constitutive relationship of a new near β titanium alloy Ti-7Mo-3Al-3Nb-3Cr (Ti-7333) for high temperature deformation was established. And the model parameters were obtained by the genetic algorithm based objective optimization method. Calculating results show that the average relative difference between the calculated flow stress and the experimental ﬂow stress is about 7.2%. The developed internal-state-variable based constitutive model can efficiently characterize the flow behavior of Ti-7333 alloy.

KW - Constitutive model

KW - Flow stress

KW - Hot deformation

KW - Near β titanium alloy

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SN - 1002-185X

VL - 44

SP - 1883

EP - 1887

JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - 8

ER -

Internal-atate-variable based constitutive modeling for near β Ti-7Mo-3Al-3Nb-3Cr alloy during hot deformation process

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