Documents disponibles écrits par cet auteur

Influence of minor aluminum concentration changes in zirconium-based bulk metallic glasses on the elastic, anelastic, and plastic properties / A. Caron in Acta materialia, Vol. 58 N° 6 (Avril 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 6 (Avril 2010) . - pp. 2004–2013 Titre : Influence of minor aluminum concentration changes in zirconium-based bulk metallic glasses on the elastic, anelastic, and plastic properties Type de document : texte imprimé Auteurs : A. Caron, Auteur ; R. Wunderlich, Auteur ; D.V. Louzguine-Luzgin, Auteur Année de publication : 2011 Article en page(s) : pp. 2004–2013 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Bulk  metallic  glasses  Ultrasound  Elasticity  Ductility Résumé : The Poisson’s ratio of Zr-based bulk metallic glasses in the system Zr63−xCu24AlxNi10Co3 was found to exhibit a non-monotonous behavior as a function of x when measured with ultrasound by the pulse–echo technique. In addition, from wave propagation velocity measurements at different frequencies, i.e. f = 2.25 MHz and f = 10 MHz, a composition-dependent anelastic behavior as a function of x is found, exhibiting a similar non-monotonous behavior. In this work we further investigated the plastic deformation and the creep properties of this glass system in compression tests and by nanoindentation. The plastic strain and the measured creep deformation show correlations with the Poisson’s ratio. We then discuss the anelastic behavior observed while measuring the sound-wave propagation velocity in the frame of the thermoelastic damping and the bond reorientation as proposed by Egami. Finally we discuss these effects with regard to X-ray diffraction analysis. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409008222 [article] Influence of minor aluminum concentration changes in zirconium-based bulk metallic glasses on the elastic, anelastic, and plastic properties [texte imprimé] / A. Caron, Auteur ; R. Wunderlich, Auteur ; D.V. Louzguine-Luzgin, Auteur . - 2011 . - pp. 2004–2013. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 6 (Avril 2010) . - pp. 2004–2013 Mots-clés : Bulk  metallic  glasses  Ultrasound  Elasticity  Ductility Résumé : The Poisson’s ratio of Zr-based bulk metallic glasses in the system Zr63−xCu24AlxNi10Co3 was found to exhibit a non-monotonous behavior as a function of x when measured with ultrasound by the pulse–echo technique. In addition, from wave propagation velocity measurements at different frequencies, i.e. f = 2.25 MHz and f = 10 MHz, a composition-dependent anelastic behavior as a function of x is found, exhibiting a similar non-monotonous behavior. In this work we further investigated the plastic deformation and the creep properties of this glass system in compression tests and by nanoindentation. The plastic strain and the measured creep deformation show correlations with the Poisson’s ratio. We then discuss the anelastic behavior observed while measuring the sound-wave propagation velocity in the frame of the thermoelastic damping and the bond reorientation as proposed by Egami. Finally we discuss these effects with regard to X-ray diffraction analysis. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409008222

Mechanical behaviour and in situ observation of shear bands in ultrafine grained Pd and Pd–Ag alloys / K. Yang in Acta materialia, Vol. 58 N° 3 (Fevrier 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 3 (Fevrier 2010) . - pp. 967-978 Titre : Mechanical behaviour and in situ observation of shear bands in ultrafine grained Pd and Pd–Ag alloys Type de document : texte imprimé Auteurs : K. Yang, Auteur ; Yu. Ivanisenko, Auteur ; A. Caron, Auteur Article en page(s) : pp. 967-978 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : In  situ  tensile  test  Grey  scale  correlation  analysis  Ultrafine  grained  materials  High-pressure  torsion Index. décimale : 669 Métallurgie Résumé : An in situ tensile test with grey scale correlation has been performed to study the deformation process in ultrafine grained (UFG) Pd and Pd–x at.% Ag (x = 5 or 20) alloys produced by high-pressure torsion. Shear band nucleation and propagation was found to be an important deformation mechanism after strain localization during the tensile test. The underlying microscopic mechanism is related to cooperative grain boundary sliding. Moreover, the additional influence of stacking fault energy was found to change the nature of the deformation mechanism from localized strain in Pd to more homogeneous deformation in Pd–20% Ag. In situ analysis and the findings are new and give innovative insight into the basics of deformation in UFG face-centred cubic metals. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235556%23 [...] [article] Mechanical behaviour and in situ observation of shear bands in ultrafine grained Pd and Pd–Ag alloys [texte imprimé] / K. Yang, Auteur ; Yu. Ivanisenko, Auteur ; A. Caron, Auteur . - pp. 967-978. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 3 (Fevrier 2010) . - pp. 967-978 Mots-clés : In  situ  tensile  test  Grey  scale  correlation  analysis  Ultrafine  grained  materials  High-pressure  torsion Index. décimale : 669 Métallurgie Résumé : An in situ tensile test with grey scale correlation has been performed to study the deformation process in ultrafine grained (UFG) Pd and Pd–x at.% Ag (x = 5 or 20) alloys produced by high-pressure torsion. Shear band nucleation and propagation was found to be an important deformation mechanism after strain localization during the tensile test. The underlying microscopic mechanism is related to cooperative grain boundary sliding. Moreover, the additional influence of stacking fault energy was found to change the nature of the deformation mechanism from localized strain in Pd to more homogeneous deformation in Pd–20% Ag. In situ analysis and the findings are new and give innovative insight into the basics of deformation in UFG face-centred cubic metals. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235556%23 [...]

Mechanical behaviour and in situ observation of shear bands in ultrafine grained Pd and Pd–Ag alloys / A. Caron in Acta materialia, Vol. 58 N° 3 (Fevrier 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 3 (Fevrier 2010) . - pp. 967–978 Titre : Mechanical behaviour and in situ observation of shear bands in ultrafine grained Pd and Pd–Ag alloys Type de document : texte imprimé Auteurs : A. Caron, Auteur Année de publication : 2011 Article en page(s) : pp. 967–978 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : In  situ  tensile  test  Grey  scale  correlation  analysis  Ultrafine  grained  materials  High-pressure  torsion Résumé : An in situ tensile test with grey scale correlation has been performed to study the deformation process in ultrafine grained (UFG) Pd and Pd–x at.% Ag (x = 5 or 20) alloys produced by high-pressure torsion. Shear band nucleation and propagation was found to be an important deformation mechanism after strain localization during the tensile test. The underlying microscopic mechanism is related to cooperative grain boundary sliding. Moreover, the additional influence of stacking fault energy was found to change the nature of the deformation mechanism from localized strain in Pd to more homogeneous deformation in Pd–20% Ag. In situ analysis and the findings are new and give innovative insight into the basics of deformation in UFG face-centred cubic metals. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409006922 [article] Mechanical behaviour and in situ observation of shear bands in ultrafine grained Pd and Pd–Ag alloys [texte imprimé] / A. Caron, Auteur . - 2011 . - pp. 967–978. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 3 (Fevrier 2010) . - pp. 967–978 Mots-clés : In  situ  tensile  test  Grey  scale  correlation  analysis  Ultrafine  grained  materials  High-pressure  torsion Résumé : An in situ tensile test with grey scale correlation has been performed to study the deformation process in ultrafine grained (UFG) Pd and Pd–x at.% Ag (x = 5 or 20) alloys produced by high-pressure torsion. Shear band nucleation and propagation was found to be an important deformation mechanism after strain localization during the tensile test. The underlying microscopic mechanism is related to cooperative grain boundary sliding. Moreover, the additional influence of stacking fault energy was found to change the nature of the deformation mechanism from localized strain in Pd to more homogeneous deformation in Pd–20% Ag. In situ analysis and the findings are new and give innovative insight into the basics of deformation in UFG face-centred cubic metals. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409006922