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A set of microstructure-based constitutive equations in hot forming of a titanium alloy

Authors
Journal
Journal of University of Science and Technology Beijing Mineral Metallurgy Material
1005-8850
Publisher
Elsevier
Publication Date
Volume
13
Issue
5
Identifiers
DOI: 10.1016/s1005-8850(06)60088-1
Keywords
  • Materials

Abstract

Abstract A physical model of microstructure evolution including dislocation density rate and grain growth rate was established based on the deformation mechanism for the hot forming of a class of two-phase titanium alloys. Further, a set of mechanism-based constitutive equations were proposed, in which the microstructure variables such as grain size and dislocation density were taken as internal state variables for characterizing the current material state. In the set of constitutive equations, the contributions of different mechanisms and individual phase to the deformation behavior were analyzed. The present equations have been applied to describe a correlation of the flow stress with the microstructure evolution of the TC6 alloy in hot forming.

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