TY - JOUR
T1 - Deformation macrolocalisation and fracture in ultrafine-grained armco iron
AU - Panin, Alexey Victorovich
AU - Panina, Alexandra Anatolievna
AU - Ivanov, Yury F.
PY - 2008/7/15
Y1 - 2008/7/15
N2 - The banded structure formed in armco iron specimens as a result of equal-channel angular extrusion causes their strong shear localisation under quasi-static tension. Applying transmission electron microscopy technique, a fine structure of meso- and macroscopic shear bands was revealed. The character of shear band propagation was studied by calculation of the maximum in-plane shear strain through a digital image correlation procedure. It was shown two different patterns of macroband propagation: two parallel shear bands with oppositely directed shears or a cross of shear bands oriented along the conjugate direction of maximum tangential stresses. The necking was revealed to be caused by the disturbance of self-consistent propagation of deformation macrobands.
AB - The banded structure formed in armco iron specimens as a result of equal-channel angular extrusion causes their strong shear localisation under quasi-static tension. Applying transmission electron microscopy technique, a fine structure of meso- and macroscopic shear bands was revealed. The character of shear band propagation was studied by calculation of the maximum in-plane shear strain through a digital image correlation procedure. It was shown two different patterns of macroband propagation: two parallel shear bands with oppositely directed shears or a cross of shear bands oriented along the conjugate direction of maximum tangential stresses. The necking was revealed to be caused by the disturbance of self-consistent propagation of deformation macrobands.
KW - Armco iron
KW - ECAE
KW - Mechanical properties
KW - Shear bands
KW - Surface displacement analysis
UR - http://www.scopus.com/inward/record.url?scp=42949177564&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=42949177564&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2007.10.002
DO - 10.1016/j.msea.2007.10.002
M3 - Article
AN - SCOPUS:42949177564
VL - 486
SP - 267
EP - 272
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
IS - 1-2
ER -