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EBSD Study of Damage Mechanisms in a High-Strength Ferrite-Martensite Dual-Phase Steel SCIE SCOPUS

Title
EBSD Study of Damage Mechanisms in a High-Strength Ferrite-Martensite Dual-Phase Steel
Authors
Saeidi, NAshrafizadeh, FNiroumand, BBarlat, F
Date Issued
2015-01
Publisher
SPRINGER
Abstract
Electron backscattered diffraction (EBSD) analyses were performed on a fine-grained dual-phase (DP) sheet steel subjected to uniform tensile deformation and the preferred void nucleation sites as well as the micro-mechanisms of void formation were examined. EBSD study of grain average misorientation, grain orientation spread and kernel average misorientation of the deformed microstructure revealed that voids nucleation initially happened at ferrite-martensite interfaces neighboring rather large ferrite grains. This is believed to be mainly due to the higher shear deformation ability of the larger ferrite grains, the higher number of dislocation pile-ups at the martensite particles and the less uniform strain distribution within the larger ferrite grains compared to the smaller ones. The results demonstrated the impact of increasing uniform strain distribution within the DP microstructure on lowering the void nucleation probability.
Keywords
dual-phase steel; EBSD analysis; void nucleation micro-mechanisms; TENSILE DEFORMATION; FRACTURE MECHANISMS; DUCTILE FRACTURE; EVOLUTION; BEHAVIOR; STRESS
URI
https://oasis.postech.ac.kr/handle/2014.oak/13191
DOI
10.1007/S11665-014-1257-4
ISSN
1059-9495
Article Type
Article
Citation
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, vol. 24, no. 1, page. 53 - 58, 2015-01
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BARLAT FREDERIC GERARDBARLAT, FREDERIC GERARD
Ferrous & Energy Materials Technology
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