TY - JOUR
T1 - Correlation between domain size obtained by X-ray Bragg profile analysis and macroscopic flow stress in severely plastically deformed copper
AU - Dubravina, Anna
AU - Zehetbauer, Michael
AU - Schafler, Erhard
AU - Alexandrov, Igor V.
N1 - Zeitschrift: Materials Science and Engineering A
DOI: 10.1016/j.msea.2004.03.093
Affiliations: Institute of Materials Physics, University of Vienna, Strudhofgasse 4, A-1090 Wien, Austria; Inst. of Physics of Adv. Materials, Ufa State Aviation Technical Univ., Ufa, Russian Federation; Erich Schmid Inst. of Mat. Science, Austrian Academy of Science, A-8700 Leoben, Austria
Adressen: Zehetbauer, M.J.; Institute of Materials Physics; University of Vienna; Strudhofgasse 4 A-1090 Wien, Austria; email: [email protected]
Import aus Scopus: 2-s2.0-10444232778
04.12.2007: Datenanforderung 2001 (Import Sachbearbeiter)
PY - 2004
Y1 - 2004
N2 - The deformation-dependent evolutions of microstructure and of strength characteristics of pure copper processed by high-pressure torsion (HPT) have been studied under different values of the hydrostatic pressure. Multiple X-ray Bragg profile analysis (MXPA) and microhardness measurements were performed to analyze the structural and mechanical features of the samples deformed by HPT within wide ranges of true equivalent strains (0.5-100) and of applied pressures p = 4 to 8 GPa. A definite reciprocal correlation between the size of coherently scattering domains and the macroscopic flow stress has been revealed. This kind of domains represents that area of crystal which has been distorted less than 2° with respect to neighbouring areas of the grain. The data at best fit to a Hall-Petch like relation with an exponent of n = 1 which confirms that the macroscopic hardening is governed by subboundaries rather than by the boundaries of highly misoriented grains which size dependence on strain does not correlate at all with that one of the microhardness. © 2004 Elsevier B.V. All rights reserved.
AB - The deformation-dependent evolutions of microstructure and of strength characteristics of pure copper processed by high-pressure torsion (HPT) have been studied under different values of the hydrostatic pressure. Multiple X-ray Bragg profile analysis (MXPA) and microhardness measurements were performed to analyze the structural and mechanical features of the samples deformed by HPT within wide ranges of true equivalent strains (0.5-100) and of applied pressures p = 4 to 8 GPa. A definite reciprocal correlation between the size of coherently scattering domains and the macroscopic flow stress has been revealed. This kind of domains represents that area of crystal which has been distorted less than 2° with respect to neighbouring areas of the grain. The data at best fit to a Hall-Petch like relation with an exponent of n = 1 which confirms that the macroscopic hardening is governed by subboundaries rather than by the boundaries of highly misoriented grains which size dependence on strain does not correlate at all with that one of the microhardness. © 2004 Elsevier B.V. All rights reserved.
U2 - 10.1016/j.msea.2004.03.093
DO - 10.1016/j.msea.2004.03.093
M3 - Article
SN - 0921-5093
VL - 387-389
SP - 817
EP - 821
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 -