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Abstract
The effect of temperature and strain rate on the plastic deformation, damage and fracture of a commercial dual phase steel (DP1000) has been investigated experimentally by uniaxial and fracture tensile tests. In the study, temperatures of -40 to 300 °C and strain rates of 0.0001 to 1000 s-1 are covered, thus encompassing conditions experienced in automotive crash scenarios. Material properties including yield and ultimate tensile strength, uniform elongation, strain rate sensitivity and fracture area reduction, together with their dependence on temperature, have been systematically determined and discussed. The steel is found to be susceptible to dynamic strain aging (DSA) primarily at higher temperatures and lower strain rates. This phenomenon controls the deformation between 200 and 300 °C. The material experiences a significant drop in uniform and total ductility in the DSA range with negative strain rate sensitivity, thus indicating poor formability at these conditions. Increased strain rates and multiaxial stress states delays or diminishes the occurrence of DSA. The comprehensive experimental series allowed to better understand the complex relationship between strain rate and temperature, and the effect these conditions have on damage properties of the dual phase steel under study.
Keywords
high temperature, strain rate, damage, fracture, dual phase steel, dynamic strain aging

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MLA
Chandran, Sarath, et al. “Thermal Effects on the Dynamic Damage and Fracture of a Dual Phase Automotive Steel.” Temperature Dependence of Material Behaviour at High Strain-Rate, Proceedings of the 24th DYMAT Technical Meeting, edited by Lorenzo Peroni and Martina Scapin, Politecnico di Torino, 2019.
APA
Chandran, S., Liu, W., Lian, J., Münstermann, S., & Verleysen, P. (2019). Thermal effects on the dynamic damage and fracture of a dual phase automotive steel. In L. Peroni & M. Scapin (Eds.), Temperature dependence of material behaviour at high strain-rate, Proceedings of the 24th DYMAT Technical Meeting. Corso Duca degli Abruzzi,Torino, Italy: Politecnico di Torino.
Chicago author-date
Chandran, Sarath, Wenqi Liu, Junhe Lian, Sebastian Münstermann, and Patricia Verleysen. 2019. “Thermal Effects on the Dynamic Damage and Fracture of a Dual Phase Automotive Steel.” In Temperature Dependence of Material Behaviour at High Strain-Rate, Proceedings of the 24th DYMAT Technical Meeting, edited by Lorenzo Peroni and Martina Scapin. Corso Duca degli Abruzzi,Torino, Italy: Politecnico di Torino.
Chicago author-date (all authors)
Chandran, Sarath, Wenqi Liu, Junhe Lian, Sebastian Münstermann, and Patricia Verleysen. 2019. “Thermal Effects on the Dynamic Damage and Fracture of a Dual Phase Automotive Steel.” In Temperature Dependence of Material Behaviour at High Strain-Rate, Proceedings of the 24th DYMAT Technical Meeting, ed by. Lorenzo Peroni and Martina Scapin. Corso Duca degli Abruzzi,Torino, Italy: Politecnico di Torino.
Vancouver
1.
Chandran S, Liu W, Lian J, Münstermann S, Verleysen P. Thermal effects on the dynamic damage and fracture of a dual phase automotive steel. In: Peroni L, Scapin M, editors. Temperature dependence of material behaviour at high strain-rate, Proceedings of the 24th DYMAT Technical Meeting. Corso Duca degli Abruzzi,Torino, Italy: Politecnico di Torino; 2019.
IEEE
[1]
S. Chandran, W. Liu, J. Lian, S. Münstermann, and P. Verleysen, “Thermal effects on the dynamic damage and fracture of a dual phase automotive steel,” in Temperature dependence of material behaviour at high strain-rate, Proceedings of the 24th DYMAT Technical Meeting, Regina Palace Hotel, Corso Umberto 29, Stresa, Lake Maggiore, Italy, 2019.
@inproceedings{8628430,
  abstract     = {The effect of temperature and strain rate on the plastic deformation, damage and fracture of a commercial dual phase steel (DP1000) has been investigated experimentally by uniaxial and fracture tensile tests. In the study, temperatures of -40 to 300 °C and strain rates of 0.0001 to 1000 s-1 are covered, thus encompassing conditions experienced in automotive crash scenarios. Material properties including yield and ultimate tensile strength, uniform elongation, strain rate sensitivity and fracture area reduction, together with their dependence on temperature, have been systematically determined and discussed. The steel is found to be susceptible to dynamic strain aging (DSA) primarily at higher temperatures and lower strain rates. This phenomenon controls the deformation between 200 and 300 °C. The material experiences a significant drop in uniform and total ductility in the DSA range with negative strain rate sensitivity, thus indicating poor formability at these conditions. Increased strain rates and multiaxial stress states delays or diminishes the occurrence of DSA. The comprehensive experimental series allowed to better understand the complex relationship between strain rate and temperature, and the effect these conditions have on damage properties of the dual phase steel under study.},
  articleno    = {DYMAT 2019 P04},
  author       = {Chandran, Sarath and Liu, Wenqi and Lian, Junhe and Münstermann, Sebastian  and Verleysen, Patricia},
  booktitle    = {Temperature dependence of material behaviour at high strain-rate, Proceedings of the 24th DYMAT Technical Meeting},
  editor       = {Peroni, Lorenzo  and Scapin, Martina },
  isbn         = {9788885745278},
  keywords     = {high temperature,strain rate,damage,fracture,dual phase steel,dynamic strain aging},
  language     = {eng},
  location     = {Regina Palace Hotel, Corso Umberto 29, Stresa, Lake Maggiore, Italy},
  pages        = {6},
  publisher    = {Politecnico di Torino},
  title        = {Thermal effects on the dynamic damage and fracture of a dual phase automotive steel},
  url          = {https://sites.google.com/view/dymat2019},
  year         = {2019},
}