Abstract
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Cold-rolled to 42% thickness reduction and annealed at 500, 625, and 700 C,
an Fe–17Mn–3Al–2Si–1Ni–0.06C wt% steel is subjected to uniaxial tension
and characterized via digital image correlation and electron back-scattering
diffraction. The cold-rolled and 500 C samples return similar microstructures
comprising predominantly α0-martensite and remnant e-martensite fractions
and a trace fraction of untransformed austenite (γ) before and after uniaxial
tension. For the 625 and 700 C samples, uniaxial tension results in the
transformation of the initially reverted and recrystallized γ into e and α0-
martensite via strain localization. The γ shows the formation of h111iγ,
h100iγ double-fiber texture, whereas the e and α0-martensite show the
development of the {hkil}e and h110iα0 || ND fibers, respectively.
1012gh1011ie extension twinning is also observed in e-martensite upon
uniaxial tension. The cold-rolled sample exhibits a mixed brittle and ductile
fracture mode. The fracture of the 500 C sample is similar to that of the
cold-rolled sample, whereas the 625 and 700 C samples display a ductile
fracture mode.