Warm deformation and fracture behaviour of DP1000 advanced high strength steel

ABSTRACT

The effect of temperature has been investigated on the mechanical properties and fracture behaviour of DP1000 advanced high-strength steel. The variation of the mechanical properties depending on temperature has been determined by performing uniaxial tensile tests at the temperatures of 25, 100, 200, 300°C at the rolling directions of 0° (rolling), 45° (diagonal), and 90° (transverse) at the strain rate of 0.0083 s⁻¹. The yield strength and tensile strength have showed a slight decrease tendency between 25 and 200°C, but the highest value has been reached by showing an increase at 300°C temperature. The amount of elongation has not been affected significantly with the increase of the temperature. While hardening coefficient has increased due to the rising temperature, no effect has been observed on strength coefficient between 25 and 100°C, but an increase has occurred at higher temperature values.

KEYWORDS:

• Temperature
• tensile
• fracture
• dual phase
• DP1000

Acknowledgement

The authors would like to thank Niğde University because of allowing them to use metal forming research laboratory facilities throughout the period of Onur’s PhD study.

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

Onur Çavuşoğlu http://orcid.org/0000-0002-7239-3902

Serkan Toros http://orcid.org/0000-0003-0438-2862

Hakan Gürün http://orcid.org/0000-0001-6189-6830

Ahmet Güral http://orcid.org/0000-0002-6211-8827