Properties of As-Rolled Dual Phase Steels 790007

Microstructure, mechanical properties, lab formability and ageing response of two as-hot-rolled dual phase steels, a heat treated dual phase steel, and microalloyed 345 MPa and 550 MPa (50 ksi and 80 ksi) steels are compared. Measurements and implications on press performance of: work hardening behaviour, strain rate sensitivity, elongation before necking, resistance to edge cracking, and uniformity of properties are discussed.
Formability of both heat treated and as-hot-rolled dual phase steels was found to be similar at a common strength level, their formability lying between that of the 345 MPa and 550 MPa steels.


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