Strain rate sensitivity and strain hardening response of DP1000 dual phase steel


ÇAVUŞOĞLU O. , GÜRÜN H. , Toros S., GÜRAL A.

METALLURGICAL RESEARCH & TECHNOLOGY, cilt.115, sa.5, 2018 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 115 Konu: 5
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1051/metal/2018016
  • Dergi Adı: METALLURGICAL RESEARCH & TECHNOLOGY

Özet

In this study, strain hardening and strain rate sensitivity behavior of commercial DP1000 dual phase steel have been examined in detail at temperatures of 25 degrees C, 100 degrees C, 200 degrees C and 300 degrees C, at strain rates of 0.0016 s(-1) and 0.16 s(-1). As the strain rate has increased, the yield strength has increased but no significant change in tensile strength and strain hardening coefficient has been observed. As the temperature has increased, the yield and tensile strength has decreased in between 25 and 200 degrees C but it has showed an increase at 300 degrees C. The strain hardening coefficient has increased in parallel with temperature increase. It has been seen that the strain rate sensitivity has not been affected by temperature. No significant difference in the hardening rate has appeared in between 25 and 200 degrees C, but the highest value has been calculated at 300 degrees C. It has been determined that the fracture behavior has occurred earlier and load carrying capacity on necking has reduced with the increase of strain rate and not significantly affected by temperature.