Abstract: In recent years, the use of advanced high strength steels in automotive industry has been increased remarkably.
Among advanced high strength steels. dual phase (DP) steels have gained a great attention owing to a combination
of high strength and good formability. However. high strength usually increases the spring-back behavior of
the material, which creates problems for the parts during the assembly. Thus. the uniaxial tensile deformation and
spring-back behaviors of DP600 advanced high strength steel were investigated in rolling (0°). diagonal (45°). and
transverse (90°) directions in the temperature range from room temperature (RT) to 300 ·C. All tests were performed
at a deformation speed of 25 mm/min. A V-shaped die (60°) was used for the spring-back measurements.
The results indicated that the formability and spring-back of the material were decreased with increasing the temperatures.
The material showed complex behaviors in different directions and at different temperatures.
Key words: advanced high strength steel; DP600; warm forming; spring-back