Abstract
AbstractThe evolution process of shear banding in a ferrite–martensite dual phase steel has been investigated via in situ tensile testing in a scanning electron microscope. Shear band type deformation localisation occurs at the maximum loading point of uniaxial tension. Necking occurs simultaneously and locally. Voids nucleate in ferrite domains and on the interfaces between the two component phases or grain boundaries. The void volume fraction is greater within the shear band than away from the band and is greater in the interior than at the specimen surface. The results also show that void damage promotes the initiation of shear bands and the development of shear banding stimulates further void damage.MST/1819
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