A modified parallel constitutive model for elevated temperature flow behavior of Ti-6Al-4V alloy based on multiple regression

Jun Cai, Jiamin Shi, Kuaishe Wang, Fuguo Li, Wen Wang, Qingjuan Wang, Yingying Liu

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Constitutive analysis for hot working of Ti-6Al-4V alloy was carried out by using experimental stress-strain data from isothermal hot compression tests. A new kind of constitutive equation called a modified parallel constitutive model was proposed by considering the independent effects of strain, strain rate and temperature. The predicted flow stress data were compared with the experimental data. Statistical analysis was introduced to verify the validity of the developed constitutive equation. Subsequently, the accuracy of the proposed constitutive equations was evaluated by comparing with other constitutive models. The results showed that the developed modified parallel constitutive model based on multiple regression could predict flow stress of Ti-6Al-4V alloy with good correlation and generalization.

Original languageEnglish
Pages (from-to)527-541
Number of pages15
JournalInternational Journal of Materials Research
Volume108
Issue number7
DOIs
StatePublished - Jul 2017

Keywords

  • Constitutive equations
  • Flow stress
  • High temperature flow behavior
  • Modified parallel constitutive model
  • Ti-6Al-4V alloy

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