Journal
SCRIPTA MATERIALIA
Volume 63, Issue 12, Pages 1220-1223Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2010.08.042
Keywords
TWIP steel; X-ray synchrotron radiation; Fracture; Anisotropic damage development
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Internal damage below the fracture surface of a multiaxial specimen made of twinning-induced plasticity (TWIP) steel was observed by three-dimensional X-ray microtomography as very elongated primary voids. Specific tools for the local damage analysis were developed. A gradient in void volume fraction was measured from the fracture surface down to the bulk of the scanned volume (from similar to 0.06% to <0.02%). However, the fracture surface is mainly composed of tiny secondary dimples (>90% in area fraction), indicating strongly localized final fracture. (c) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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