Image force on a dislocation in a Ni-based superalloy due to the γ-γ' interface
Identifieur interne : 000450 ( France/Analysis ); précédent : 000449; suivant : 000451Image force on a dislocation in a Ni-based superalloy due to the γ-γ' interface
Auteurs : L. Priester [France] ; O. Khalfallah [Algérie] ; A. Coujou [France]Source :
- Philosophical magazine. A. Physics of condensed matter. Structure, defects and mechanical properties [ 1364-2804 ] ; 1997.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
The image force due to the γ-γ' interfaces on dislocations situated in the γ channels or in the γ' precipitates in Ni-based superalloys is investigated on the basis of the anisotropic theory of elasticity. The results are affected by the choice of the elastic constants available in the literature but, in most cases, the values of the image forces are comparable with those of the other forces acting on the dislocations. At room temperature, the sense of the image forces does not depend on the choice of the elastic constants; the dislocations in γ are always attracted to the interfaces and those in γ' are always repelled from them. At 1050°C, however, opposite conclusions may be reached depending on the constants used. These different effects are discussed by comparison with the configurations observed by in situ transmission electron microscopy.
Affiliations:
- Algérie, France
- Midi-Pyrénées, Occitanie (région administrative), Île-de-France
- Orsay, Toulouse
- Université Paris-Sud
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Pascal:97-0177966Le document en format XML
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Khalfallah</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Institut de Physique, Université de Constantine</s1><s3>DZA</s3><sZ>2 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>Institut de Physique, Université de Constantine</wicri:noRegion></affiliation></author><author><name sortKey="Coujou, A" sort="Coujou, A" uniqKey="Coujou A" first="A." last="Coujou">A. Coujou</name><affiliation wicri:level="3"><inist:fA14 i1="03"><s1>Centre d'Elaboration des Matériaux et d'Etudes Structurales, Laboratoire d'Optique Electronique CNRS, BP4347</s1><s2>31055 Toulouse</s2><s3>FRA</s3><sZ>3 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Occitanie (région administrative)</region><region type="old region" nuts="2">Midi-Pyrénées</region><settlement type="city">Toulouse</settlement></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">97-0177966</idno><date when="1997">1997</date><idno type="stanalyst">PASCAL 97-0177966 INIST</idno><idno type="RBID">Pascal:97-0177966</idno><idno type="wicri:Area/PascalFrancis/Corpus">000525</idno><idno type="wicri:Area/PascalFrancis/Curation">000542</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000517</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000517</idno><idno type="wicri:doubleKey">1364-2804:1997:Priester L:image:force:on</idno><idno type="wicri:Area/Main/Merge">000E74</idno><idno type="wicri:Area/Main/Curation">000E24</idno><idno type="wicri:Area/Main/Exploration">000E24</idno><idno type="wicri:Area/France/Extraction">000450</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Image force on a dislocation in a Ni-based superalloy due to the γ-γ' interface</title><author><name sortKey="Priester, L" sort="Priester, L" uniqKey="Priester L" first="L." last="Priester">L. Priester</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Laboratoire de Métallurgie Structurale, Unité Associée au CNRS 1107, Université Paris Sud</s1><s2>91405 Orsay</s2><s3>FRA</s3><sZ>1 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Orsay</settlement></placeName><orgName type="university">Université Paris-Sud</orgName></affiliation></author><author><name sortKey="Khalfallah, O" sort="Khalfallah, O" uniqKey="Khalfallah O" first="O." last="Khalfallah">O. Khalfallah</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Institut de Physique, Université de Constantine</s1><s3>DZA</s3><sZ>2 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>Institut de Physique, Université de Constantine</wicri:noRegion></affiliation></author><author><name sortKey="Coujou, A" sort="Coujou, A" uniqKey="Coujou A" first="A." last="Coujou">A. Coujou</name><affiliation wicri:level="3"><inist:fA14 i1="03"><s1>Centre d'Elaboration des Matériaux et d'Etudes Structurales, Laboratoire d'Optique Electronique CNRS, BP4347</s1><s2>31055 Toulouse</s2><s3>FRA</s3><sZ>3 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Occitanie (région administrative)</region><region type="old region" nuts="2">Midi-Pyrénées</region><settlement type="city">Toulouse</settlement></placeName></affiliation></author></analytic><series><title level="j" type="main">Philosophical magazine. A. Physics of condensed matter. Structure, defects and mechanical properties</title><title level="j" type="abbreviated">Philos. mag., A, Phys. condens. matter, Struct. defects mech. prop.</title><idno type="ISSN">1364-2804</idno><imprint><date when="1997">1997</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Philosophical magazine. A. Physics of condensed matter. Structure, defects and mechanical properties</title><title level="j" type="abbreviated">Philos. mag., A, Phys. condens. matter, Struct. defects mech. prop.</title><idno type="ISSN">1364-2804</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Dislocation</term><term>Elastic constant</term><term>Force</term><term>Interface</term><term>Nickel base alloys</term><term>Precipitate</term><term>Superalloy</term><term>Transmission electron microscopy</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Constante élasticité</term><term>Dislocation</term><term>Superalliage</term><term>Force</term><term>Précipité</term><term>Alliage base nickel</term><term>Interface</term><term>Microscopie électronique transmission</term><term>Alliage Ni64Cr8W8Ta6Al5Co5Mo2Ti2</term><term>Al Co Cr Mo Ni Ta Ti W</term><term>Alliage MC2</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The image force due to the γ-γ' interfaces on dislocations situated in the γ channels or in the γ' precipitates in Ni-based superalloys is investigated on the basis of the anisotropic theory of elasticity. The results are affected by the choice of the elastic constants available in the literature but, in most cases, the values of the image forces are comparable with those of the other forces acting on the dislocations. At room temperature, the sense of the image forces does not depend on the choice of the elastic constants; the dislocations in γ are always attracted to the interfaces and those in γ' are always repelled from them. At 1050°C, however, opposite conclusions may be reached depending on the constants used. These different effects are discussed by comparison with the configurations observed by in situ transmission electron microscopy.</div></front></TEI><affiliations><list><country><li>Algérie</li><li>France</li></country><region><li>Midi-Pyrénées</li><li>Occitanie (région administrative)</li><li>Île-de-France</li></region><settlement><li>Orsay</li><li>Toulouse</li></settlement><orgName><li>Université Paris-Sud</li></orgName></list><tree><country name="France"><region name="Île-de-France"><name sortKey="Priester, L" sort="Priester, L" uniqKey="Priester L" first="L." last="Priester">L. Priester</name></region><name sortKey="Coujou, A" sort="Coujou, A" uniqKey="Coujou A" first="A." last="Coujou">A. Coujou</name></country><country name="Algérie"><noRegion><name sortKey="Khalfallah, O" sort="Khalfallah, O" uniqKey="Khalfallah O" first="O." last="Khalfallah">O. Khalfallah</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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