Modelling of active transformation of microstructure of two-phase Ti alloys during hot working

O.I. Bylja, B.K. Pradhan, E.B. Yakushina, P.L. Blackwell, R.A. Vasin

Research output: Contribution to journalArticle

Abstract

Being very strong and of limited ductility, Ti alloys require special techniques to manufacture the parts with complex shapes. Many of these technologies are based on superplastic and near-to-superplastic deforming. In these processes the transformation of the microstructure of the material can be very significant and can lead to changes in the mechanical properties of the material during deformation. Because of this an appropriate description of the correlation between mechanical loading, changes in microstructure and mechanical behavior of material is required. A phenomenological scalar model with an internal variable based on a statistical description of microstructure is proposed and used for simulation of the high temperature deformation of Ti-6Al-4V alloy. The problems of obtaining the parameters of the model and sensitivity of the model to the accuracy of this process are discussed.
LanguageEnglish
Pages124-129
Number of pages6
JournalLetters on Materials
Volume4
Issue number2
Publication statusPublished - 2014

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Hot working
Microstructure
Ductility
Mechanical properties
Temperature

Keywords

  • constitutive modelling
  • simulation
  • superplasticity
  • microstructure transformation

Cite this

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title = "Modelling of active transformation of microstructure of two-phase Ti alloys during hot working",
abstract = "Being very strong and of limited ductility, Ti alloys require special techniques to manufacture the parts with complex shapes. Many of these technologies are based on superplastic and near-to-superplastic deforming. In these processes the transformation of the microstructure of the material can be very significant and can lead to changes in the mechanical properties of the material during deformation. Because of this an appropriate description of the correlation between mechanical loading, changes in microstructure and mechanical behavior of material is required. A phenomenological scalar model with an internal variable based on a statistical description of microstructure is proposed and used for simulation of the high temperature deformation of Ti-6Al-4V alloy. The problems of obtaining the parameters of the model and sensitivity of the model to the accuracy of this process are discussed.",
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Modelling of active transformation of microstructure of two-phase Ti alloys during hot working. / Bylja, O.I.; Pradhan, B.K.; Yakushina, E.B.; Blackwell, P.L.; Vasin, R.A.

In: Letters on Materials, Vol. 4, No. 2, 2014, p. 124-129.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Modelling of active transformation of microstructure of two-phase Ti alloys during hot working

AU - Bylja, O.I.

AU - Pradhan, B.K.

AU - Yakushina, E.B.

AU - Blackwell, P.L.

AU - Vasin, R.A.

PY - 2014

Y1 - 2014

N2 - Being very strong and of limited ductility, Ti alloys require special techniques to manufacture the parts with complex shapes. Many of these technologies are based on superplastic and near-to-superplastic deforming. In these processes the transformation of the microstructure of the material can be very significant and can lead to changes in the mechanical properties of the material during deformation. Because of this an appropriate description of the correlation between mechanical loading, changes in microstructure and mechanical behavior of material is required. A phenomenological scalar model with an internal variable based on a statistical description of microstructure is proposed and used for simulation of the high temperature deformation of Ti-6Al-4V alloy. The problems of obtaining the parameters of the model and sensitivity of the model to the accuracy of this process are discussed.

AB - Being very strong and of limited ductility, Ti alloys require special techniques to manufacture the parts with complex shapes. Many of these technologies are based on superplastic and near-to-superplastic deforming. In these processes the transformation of the microstructure of the material can be very significant and can lead to changes in the mechanical properties of the material during deformation. Because of this an appropriate description of the correlation between mechanical loading, changes in microstructure and mechanical behavior of material is required. A phenomenological scalar model with an internal variable based on a statistical description of microstructure is proposed and used for simulation of the high temperature deformation of Ti-6Al-4V alloy. The problems of obtaining the parameters of the model and sensitivity of the model to the accuracy of this process are discussed.

KW - constitutive modelling

KW - simulation

KW - superplasticity

KW - microstructure transformation

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EP - 129

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T2 - Letters on Materials

JF - Letters on Materials

SN - 2218-5046

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