Quantitative measurements of dynamic precipitation during fatigue of an Al-Zn-Mg-(Cu) alloy using small-angle X-ray scattering
Identifieur interne : 003F94 ( Main/Exploration ); précédent : 003F93; suivant : 003F95Quantitative measurements of dynamic precipitation during fatigue of an Al-Zn-Mg-(Cu) alloy using small-angle X-ray scattering
Auteurs : C. R. Hutchinson [Australie] ; F. De Geuser [France] ; Y. Chen [Australie] ; A. Deschamps [France]Source :
- Acta materialia [ 1359-6454 ] ; 2014.
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Abstract
The room temperature cyclic deformation behaviour of an Al-Zn-Mg-(Cu) alloy was examined in the under-aged and peak-aged states. The tests were performed under constant plastic strain amplitude loading in tension-compression mode, and the effect of cumulative strain (number of cycles), strain rate and plastic strain amplitude was examined. Pronounced cyclic hardening was observed in the under-aged states, and characterization of the microstructure using small-angle X-ray scattering illustrated that this was due to profuse dynamic precipitation at room temperature during cycling. Regardless of deformation conditions, the radius of the dynamically formed GP zones remained constant at 4-5 Å, and only the volume fraction of the zones increased during cycling. The strain, strain rate and plastic strain amplitude dependence of the evolution of the volume fraction of zones forming dynamically was interpreted in terms of a nucleation-dominated reaction, and it is shown that the behaviour can be satisfactorily rationalized when the role of strain-induced vacancies is considered.
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R." last="Hutchinson">C. R. Hutchinson</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>ARC Centre of Excellence for Design in Light Metals, Department of Materials Engineering, Monash University</s1><s2>Clayton, VIC</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Clayton, VIC</wicri:noRegion></affiliation></author><author><name sortKey="De Geuser, F" sort="De Geuser, F" uniqKey="De Geuser F" first="F." last="De Geuser">F. De Geuser</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>University of Grenoble Alpes, SI MAP</s1><s2>38000 Grenoble</s2><s3>FRA</s3><sZ>2 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>38000 Grenoble</wicri:noRegion><placeName><settlement type="city">Grenoble</settlement><region type="region" nuts="2">Auvergne-Rhône-Alpes</region><region type="old region" nuts="2">Rhône-Alpes</region></placeName></affiliation><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>CNRS, SI MAP</s1><s2>38000 Grenoble</s2><s3>FRA</s3><sZ>2 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>38000 Grenoble</wicri:noRegion><placeName><settlement type="city">Grenoble</settlement><region type="region" nuts="2">Auvergne-Rhône-Alpes</region><region type="old region" nuts="2">Rhône-Alpes</region></placeName></affiliation></author><author><name sortKey="Chen, Y" sort="Chen, Y" uniqKey="Chen Y" first="Y." last="Chen">Y. Chen</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>ARC Centre of Excellence for Design in Light Metals, Department of Materials Engineering, Monash University</s1><s2>Clayton, VIC</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Clayton, VIC</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Monash Centre for Electron Microscopy, Monash University</s1><s2>Clayton, VIC</s2><s3>AUS</s3><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Clayton, VIC</wicri:noRegion></affiliation></author><author><name sortKey="Deschamps, A" sort="Deschamps, A" uniqKey="Deschamps A" first="A." last="Deschamps">A. Deschamps</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>University of Grenoble Alpes, SI MAP</s1><s2>38000 Grenoble</s2><s3>FRA</s3><sZ>2 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>38000 Grenoble</wicri:noRegion><placeName><settlement type="city">Grenoble</settlement><region type="region" nuts="2">Auvergne-Rhône-Alpes</region><region type="old region" nuts="2">Rhône-Alpes</region></placeName></affiliation><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>CNRS, SI MAP</s1><s2>38000 Grenoble</s2><s3>FRA</s3><sZ>2 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>38000 Grenoble</wicri:noRegion><placeName><settlement type="city">Grenoble</settlement><region type="region" nuts="2">Auvergne-Rhône-Alpes</region><region type="old region" nuts="2">Rhône-Alpes</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Acta materialia</title><title level="j" type="abbreviated">Acta mater.</title><idno type="ISSN">1359-6454</idno><imprint><date when="2014">2014</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Acta materialia</title><title level="j" type="abbreviated">Acta mater.</title><idno type="ISSN">1359-6454</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aluminium base alloys</term><term>Copper alloy</term><term>Cyclic load</term><term>Deformation</term><term>Fatigue</term><term>Magnesium alloy</term><term>Precipitation</term><term>Zinc base alloys</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Précipitation</term><term>Fatigue</term><term>Cuivre alliage</term><term>Alliage base aluminium</term><term>Magnésium alliage</term><term>Alliage base zinc</term><term>Charge cyclique</term><term>Déformation</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The room temperature cyclic deformation behaviour of an Al-Zn-Mg-(Cu) alloy was examined in the under-aged and peak-aged states. The tests were performed under constant plastic strain amplitude loading in tension-compression mode, and the effect of cumulative strain (number of cycles), strain rate and plastic strain amplitude was examined. Pronounced cyclic hardening was observed in the under-aged states, and characterization of the microstructure using small-angle X-ray scattering illustrated that this was due to profuse dynamic precipitation at room temperature during cycling. Regardless of deformation conditions, the radius of the dynamically formed GP zones remained constant at 4-5 Å, and only the volume fraction of the zones increased during cycling. The strain, strain rate and plastic strain amplitude dependence of the evolution of the volume fraction of zones forming dynamically was interpreted in terms of a nucleation-dominated reaction, and it is shown that the behaviour can be satisfactorily rationalized when the role of strain-induced vacancies is considered.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li></country><region><li>Auvergne-Rhône-Alpes</li><li>Rhône-Alpes</li></region><settlement><li>Grenoble</li></settlement></list><tree><country name="Australie"><noRegion><name sortKey="Hutchinson, C R" sort="Hutchinson, C R" uniqKey="Hutchinson C" first="C. R." last="Hutchinson">C. R. Hutchinson</name></noRegion><name sortKey="Chen, Y" sort="Chen, Y" uniqKey="Chen Y" first="Y." last="Chen">Y. Chen</name><name sortKey="Chen, Y" sort="Chen, Y" uniqKey="Chen Y" first="Y." last="Chen">Y. Chen</name></country><country name="France"><region name="Auvergne-Rhône-Alpes"><name sortKey="De Geuser, F" sort="De Geuser, F" uniqKey="De Geuser F" first="F." last="De Geuser">F. De Geuser</name></region><name sortKey="De Geuser, F" sort="De Geuser, F" uniqKey="De Geuser F" first="F." last="De Geuser">F. De Geuser</name><name sortKey="Deschamps, A" sort="Deschamps, A" uniqKey="Deschamps A" first="A." last="Deschamps">A. Deschamps</name><name sortKey="Deschamps, A" sort="Deschamps, A" uniqKey="Deschamps A" first="A." last="Deschamps">A. Deschamps</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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