TY - JOUR
T1 - Nanostructures in L12-ordered Cu3Au processed by torsion under high pressure
AU - Rentenberger, Christian
AU - Mangler, Clemens
AU - Karnthaler, Hans-Peter
N1 - DOI: 10.1016/j.msea.2004.01.110
Affiliations: Institute of Materials Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
Adressen: Rentenberger, C.; Institute of Materials Physics; University of Vienna; Boltzmanngasse 5 A-1090 Vienna, Austria; email: [email protected]
Import aus Scopus: 2-s2.0-10444249650
04.12.2007: Datenanforderung 2001 (Import Sachbearbeiter)
PY - 2004
Y1 - 2004
N2 - L12-ordered Cu3Au deformed by high pressure torsion (HPT) was investigated using Vickers microhardness and transmission electron microscopy (TEM). It is shown that the HPT deformation procedure can produce banded zones of nanograins with a grain size below 500 nm embedded within grains of several micrometers. Electron diffraction patterns and dark-field images using superlattice reflections reveal that the long-range order is destroyed completely at large strains (shear strain ? 50) whereas at lower strains (shear strain <20) disordering occurs very locally on a nanometer scale. It is proposed that deformation-induced disordering is important for the formation of the fine-grained structure and occurs by antiphase boundary faults forming tubes. The observed increase of the microhardness with increasing shear strain can be correlated with a decrease of the long-range order and a decrease of the grain size. Π2004 Elsevier B.V. All rights reserved.
AB - L12-ordered Cu3Au deformed by high pressure torsion (HPT) was investigated using Vickers microhardness and transmission electron microscopy (TEM). It is shown that the HPT deformation procedure can produce banded zones of nanograins with a grain size below 500 nm embedded within grains of several micrometers. Electron diffraction patterns and dark-field images using superlattice reflections reveal that the long-range order is destroyed completely at large strains (shear strain ? 50) whereas at lower strains (shear strain <20) disordering occurs very locally on a nanometer scale. It is proposed that deformation-induced disordering is important for the formation of the fine-grained structure and occurs by antiphase boundary faults forming tubes. The observed increase of the microhardness with increasing shear strain can be correlated with a decrease of the long-range order and a decrease of the grain size. Π2004 Elsevier B.V. All rights reserved.
U2 - 10.1016/j.msea.2004.01.110
DO - 10.1016/j.msea.2004.01.110
M3 - Article
SN - 0921-5093
VL - 387-389
SP - 795
EP - 798
JO - Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing
JF - Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing
IS - 1-2 SPEC.
ER -