Experimental investigation of boron steel at hot stamping conditions

Nan Li, Chaoyang Sun, Ning Guo, Mohamed Mohamed, Jianguo Lin, Takeki Matsumotoc, Chao Liu

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The effect of deformation temperature and strain rate on the fracture and strain hardening of boron steel was investigated through the analysis of large amount of experimental data tested using a Gleeble (3800) materials simulator. These features were further modelled by using a set of unified viscoplastic damage constitutive equations. To study the deformation behavior, isothermal uniaxial tension tests of 1500 MPa boron steel at different strain rates of 0.01–5.0 s-1 and different deformation temperatures of 550–850 °C were performed on a Gleeble 3800 materials simulator. Considering the difference between the deformation of the necking cross section and the centre measuring cross section of specimen at necking stage, a correction method of measuring strain at the necking cross section was developed. In addition, by taking temperature rise during deformation into account, a correction method of measuring stress was proposed. The true stress-strain curves were obtained based on the two corrections methods. The influence of deformation temperature and strain rate on the fracture and hardening was analyzed. A set of unified constitutive equations was adopted and determined from experimental data. The correlation between the numerical-computed and experimental true stress-strain data is presented. The average relative error is within the range of allowable experimental conditions and the predicted and experimental values can almost be consistent.
LanguageEnglish
Pages2-10
Number of pages9
JournalJournal of Materials Processing Technology
Volume228
Early online date30 Sep 2015
DOIs
Publication statusPublished - 28 Feb 2016

Fingerprint

Boron
Stamping
Steel
Experimental Investigation
Strain Rate
Strain rate
Cross section
Constitutive Equation
Constitutive equations
Simulator
Simulators
Experimental Data
Temperature
Strain Hardening
Stress-strain curves
Relative Error
Hardening
Strain hardening
Damage
Curve

Keywords

  • boron steel
  • hot stamping
  • correction method
  • fracture
  • hardening
  • viscoplastic constitutive model

Cite this

Li, Nan ; Sun, Chaoyang ; Guo, Ning ; Mohamed, Mohamed ; Lin, Jianguo ; Matsumotoc, Takeki ; Liu, Chao. / Experimental investigation of boron steel at hot stamping conditions. In: Journal of Materials Processing Technology. 2016 ; Vol. 228. pp. 2-10.
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abstract = "The effect of deformation temperature and strain rate on the fracture and strain hardening of boron steel was investigated through the analysis of large amount of experimental data tested using a Gleeble (3800) materials simulator. These features were further modelled by using a set of unified viscoplastic damage constitutive equations. To study the deformation behavior, isothermal uniaxial tension tests of 1500 MPa boron steel at different strain rates of 0.01–5.0 s-1 and different deformation temperatures of 550–850 °C were performed on a Gleeble 3800 materials simulator. Considering the difference between the deformation of the necking cross section and the centre measuring cross section of specimen at necking stage, a correction method of measuring strain at the necking cross section was developed. In addition, by taking temperature rise during deformation into account, a correction method of measuring stress was proposed. The true stress-strain curves were obtained based on the two corrections methods. The influence of deformation temperature and strain rate on the fracture and hardening was analyzed. A set of unified constitutive equations was adopted and determined from experimental data. The correlation between the numerical-computed and experimental true stress-strain data is presented. The average relative error is within the range of allowable experimental conditions and the predicted and experimental values can almost be consistent.",
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Experimental investigation of boron steel at hot stamping conditions. / Li, Nan; Sun, Chaoyang ; Guo, Ning; Mohamed, Mohamed; Lin, Jianguo; Matsumotoc, Takeki ; Liu, Chao.

In: Journal of Materials Processing Technology, Vol. 228, 28.02.2016, p. 2-10.

Research output: Contribution to journalArticle

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