Superplastic deformation behavior of ultra-fine-grained Ti-1V-4Al-3Mo alloy: constitutive modeling and processing map

A O Mosleh, A V Mikhaylovskaya, A D Kotov, M Sitkina, P Mestre-Rinn, J S Kwame

Research output: Contribution to journalArticle

Abstract

This paper studies the superplasticity of conventional sheets of Ti-1V-4Al-3Mo (α+β) alloy. The flow behavior was investigated in a temperature range of 775 °C–900 °C and a constant strain rate range of 2×10−4–5×10−3 s−1 via uniaxial tensile tests. The microstructure evolution during the superplastic deformation was analyzed. The results revealed that, the flow behavior of Ti-1V-4Al- 3Mo (α+β) alloy is characterized by strain softening phenomena. The experimental stress-strain data were used to build a power law constitutive model. A processing map, which shows the safe and unsafe regions of deformation, was also constructed for the studied alloy. The optimal deformation regime was attained at a temperature of 875 °C and strain rate of 1×10−3 s−1 which provided a β phase fraction of 52%. Equiaxed fine-grained α and β structure with size of 2–3 μm as well as dislocation activity inside the α-grains were identified in the optimum deformation regime.
LanguageEnglish
Article number9
Pages1-9
Number of pages9
JournalMaterials Research Express
Volume6
Issue number9
DOIs
Publication statusPublished - 19 Jul 2019

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Superplastic deformation
Strain rate
Processing
Superplasticity
Constitutive models
Temperature
Microstructure

Keywords

  • constitutive modeling
  • titanium alloy
  • activation energy
  • superplasticity
  • processing maps

Cite this

Mosleh, A O ; Mikhaylovskaya, A V ; Kotov, A D ; Sitkina, M ; Mestre-Rinn, P ; Kwame, J S. / Superplastic deformation behavior of ultra-fine-grained Ti-1V-4Al-3Mo alloy : constitutive modeling and processing map. In: Materials Research Express. 2019 ; Vol. 6, No. 9. pp. 1-9.
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abstract = "This paper studies the superplasticity of conventional sheets of Ti-1V-4Al-3Mo (α+β) alloy. The flow behavior was investigated in a temperature range of 775 °C–900 °C and a constant strain rate range of 2×10−4–5×10−3 s−1 via uniaxial tensile tests. The microstructure evolution during the superplastic deformation was analyzed. The results revealed that, the flow behavior of Ti-1V-4Al- 3Mo (α+β) alloy is characterized by strain softening phenomena. The experimental stress-strain data were used to build a power law constitutive model. A processing map, which shows the safe and unsafe regions of deformation, was also constructed for the studied alloy. The optimal deformation regime was attained at a temperature of 875 °C and strain rate of 1×10−3 s−1 which provided a β phase fraction of 52{\%}. Equiaxed fine-grained α and β structure with size of 2–3 μm as well as dislocation activity inside the α-grains were identified in the optimum deformation regime.",
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Superplastic deformation behavior of ultra-fine-grained Ti-1V-4Al-3Mo alloy : constitutive modeling and processing map. / Mosleh, A O; Mikhaylovskaya, A V; Kotov, A D; Sitkina, M; Mestre-Rinn, P; Kwame, J S.

In: Materials Research Express, Vol. 6, No. 9, 9, 19.07.2019, p. 1-9.

Research output: Contribution to journalArticle

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AU - Mosleh, A O

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AU - Sitkina, M

AU - Mestre-Rinn, P

AU - Kwame, J S

N1 - This is an author-created, un-copyedited version of an article published in Materials Research Express. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/2053-1591/ab31f9.

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N2 - This paper studies the superplasticity of conventional sheets of Ti-1V-4Al-3Mo (α+β) alloy. The flow behavior was investigated in a temperature range of 775 °C–900 °C and a constant strain rate range of 2×10−4–5×10−3 s−1 via uniaxial tensile tests. The microstructure evolution during the superplastic deformation was analyzed. The results revealed that, the flow behavior of Ti-1V-4Al- 3Mo (α+β) alloy is characterized by strain softening phenomena. The experimental stress-strain data were used to build a power law constitutive model. A processing map, which shows the safe and unsafe regions of deformation, was also constructed for the studied alloy. The optimal deformation regime was attained at a temperature of 875 °C and strain rate of 1×10−3 s−1 which provided a β phase fraction of 52%. Equiaxed fine-grained α and β structure with size of 2–3 μm as well as dislocation activity inside the α-grains were identified in the optimum deformation regime.

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