Abstract
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Increasing demand for automotive vehicles with reduced weight, improved
crashworthiness and passengers safety has steamed the research of new Twinning Induced Plasticity
(TWIP) steels. In this work the effect of annealing between 400 and 900oC on the microstructure
and mechanical properties of hot and cold rolled 0.06C-24Mn-3Al-2Si-1Ni (wt%) steel with TWIP
effect was investigated. The results have shown that steel exhibits fast recrystallization kinetics with
a low amount of recovery, which results in a high driving force for the former. Mechanical
properties were determined using Vickers microhardness and tensile tests. Tensile strength of 670
MPa with 54% of total elongation, and strain hardening exponent of 0.57 were reached after
annealing at 900°C.