Flow Behavior and Constitutive Model of a β-γ TiAl-Based Alloy Under Hot Deformation

L. Xiang; B. Tang; J. Q. Tao; Q. Chen; Z. W. Huang; G. Z. Zhao; Y. Liu; X. F. Chen; J. S. Li; Y. Tang

doi:10.1007/s11223-021-00272-4

Flow Behavior and Constitutive Model of a β-γ TiAl-Based Alloy Under Hot Deformation

L. Xiang
, B. Tang
, J. Q. Tao
, Q. Chen
, Z. W. Huang
, G. Z. Zhao
, Y. Liu
, X. F. Chen
, J. S. Li
, Y. Tang

School of Materials Sience and Engineering

Southwest Technique and Engineering Institute
Northwestern Polytechnical University Xian

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

Abstract

The flow behavior of a TNM alloy was evaluated in the high-temperature compression tests. The constitutive models for the flow curves and dynamic recrystallization were constructed to predict stress-strain and microstructure variations. The flow behavior of a Ti-43Al-4Nb-1Mo-0.2B alloy was studied by employing hot compression tests within a temperature range of 1000–1200°C and strain rates of 0.001–0.1 s^-1. The flow stress of the alloy was gradually going down with temperature and strain rate decrease, and dynamic recrystallization was the main softening mechanism. The peak shape evolution indicated that recrystallization occurred preferentially at high temperatures and low strain rates. The constitutive model for the flow behavior of the alloy was constructed with the fifth-order polynomial fitting method. Additionally, simulation of the volume fraction and grain sizes in recrystallization was effected. All the models demonstrated a good fit with the experimental results.

Original language	English
Pages (from-to)	163-172
Number of pages	10
Journal	Strength of Materials
Volume	53
Issue number	1
DOIs	https://doi.org/10.1007/s11223-021-00272-4
State	Published - Jan 2021

Keywords

TiAl-based alloy
constitutive model
dynamic recrystallization
flow behavior
hot deformation

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10.1007/s11223-021-00272-4

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title = "Flow Behavior and Constitutive Model of a β-γ TiAl-Based Alloy Under Hot Deformation",

abstract = "The flow behavior of a TNM alloy was evaluated in the high-temperature compression tests. The constitutive models for the flow curves and dynamic recrystallization were constructed to predict stress-strain and microstructure variations. The flow behavior of a Ti-43Al-4Nb-1Mo-0.2B alloy was studied by employing hot compression tests within a temperature range of 1000–1200°C and strain rates of 0.001–0.1 s-1. The flow stress of the alloy was gradually going down with temperature and strain rate decrease, and dynamic recrystallization was the main softening mechanism. The peak shape evolution indicated that recrystallization occurred preferentially at high temperatures and low strain rates. The constitutive model for the flow behavior of the alloy was constructed with the fifth-order polynomial fitting method. Additionally, simulation of the volume fraction and grain sizes in recrystallization was effected. All the models demonstrated a good fit with the experimental results.",

keywords = "TiAl-based alloy, constitutive model, dynamic recrystallization, flow behavior, hot deformation",

author = "L. Xiang and B. Tang and Tao, \{J. Q.\} and Q. Chen and Huang, \{Z. W.\} and Zhao, \{G. Z.\} and Y. Liu and Chen, \{X. F.\} and Li, \{J. S.\} and Y. Tang",

note = "Publisher Copyright: {\textcopyright} 2021, Springer Science+Business Media, LLC, part of Springer Nature.",

year = "2021",

month = jan,

doi = "10.1007/s11223-021-00272-4",

language = "英语",

volume = "53",

pages = "163--172",

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TY - JOUR

T1 - Flow Behavior and Constitutive Model of a β-γ TiAl-Based Alloy Under Hot Deformation

AU - Xiang, L.

AU - Tang, B.

AU - Tao, J. Q.

AU - Chen, Q.

AU - Huang, Z. W.

AU - Zhao, G. Z.

AU - Liu, Y.

AU - Chen, X. F.

AU - Li, J. S.

AU - Tang, Y.

PY - 2021/1

Y1 - 2021/1

N2 - The flow behavior of a TNM alloy was evaluated in the high-temperature compression tests. The constitutive models for the flow curves and dynamic recrystallization were constructed to predict stress-strain and microstructure variations. The flow behavior of a Ti-43Al-4Nb-1Mo-0.2B alloy was studied by employing hot compression tests within a temperature range of 1000–1200°C and strain rates of 0.001–0.1 s-1. The flow stress of the alloy was gradually going down with temperature and strain rate decrease, and dynamic recrystallization was the main softening mechanism. The peak shape evolution indicated that recrystallization occurred preferentially at high temperatures and low strain rates. The constitutive model for the flow behavior of the alloy was constructed with the fifth-order polynomial fitting method. Additionally, simulation of the volume fraction and grain sizes in recrystallization was effected. All the models demonstrated a good fit with the experimental results.

AB - The flow behavior of a TNM alloy was evaluated in the high-temperature compression tests. The constitutive models for the flow curves and dynamic recrystallization were constructed to predict stress-strain and microstructure variations. The flow behavior of a Ti-43Al-4Nb-1Mo-0.2B alloy was studied by employing hot compression tests within a temperature range of 1000–1200°C and strain rates of 0.001–0.1 s-1. The flow stress of the alloy was gradually going down with temperature and strain rate decrease, and dynamic recrystallization was the main softening mechanism. The peak shape evolution indicated that recrystallization occurred preferentially at high temperatures and low strain rates. The constitutive model for the flow behavior of the alloy was constructed with the fifth-order polynomial fitting method. Additionally, simulation of the volume fraction and grain sizes in recrystallization was effected. All the models demonstrated a good fit with the experimental results.

KW - TiAl-based alloy

KW - constitutive model

KW - dynamic recrystallization

KW - flow behavior

KW - hot deformation

UR - https://www.scopus.com/pages/publications/85105380331

U2 - 10.1007/s11223-021-00272-4

DO - 10.1007/s11223-021-00272-4

M3 - 文章

AN - SCOPUS:85105380331

SN - 0039-2316

VL - 53

SP - 163

EP - 172

JO - Strength of Materials

JF - Strength of Materials

IS - 1

ER -

Flow Behavior and Constitutive Model of a β-γ TiAl-Based Alloy Under Hot Deformation

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Keywords

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