Hot deformation behavior of two C-Mn-Si based and C-Mn-Al based microalloyed high-strength steels: A comparative study

•We compared the hot deformation behavior of a high Al steel to a high Si steel.•The flow stress of high Al steel is higher.•The activation energy of high Si steel is higher.•The peak strain of high Al steel is higher.•The dynamic recrystallization kinetics of high Al steel is faster.