Effect of Pin Length on the Lap Friction ...
Type de document :
Article dans une revue scientifique
URL permanente :
Titre :
Effect of Pin Length on the Lap Friction Stir Processing of a TRIP 800 Steel Grade with a Ni Interlayer
Auteur(s) :
Avettand-Fènoël, Marie-Noëlle [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Nagaoka, T [Auteur]
Osaka Institute of Technology = Osaka Kogyo Daigaku [OIT]
Taillard, Roland [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Taillard, Roland [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Nagaoka, T [Auteur]
Osaka Institute of Technology = Osaka Kogyo Daigaku [OIT]
Taillard, Roland [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Taillard, Roland [Auteur]
Titre de la revue :
Metallurgical and Materials Transactions A
Nom court de la revue :
Metall Mater Trans A
Numéro :
55
Pagination :
3724-3736
Éditeur :
Springer Science and Business Media LLC
Date de publication :
2024-07-18
ISSN :
1073-5623
Discipline(s) HAL :
Chimie/Matériaux
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Résumé en anglais : [en]
Friction stir lap processing of 1.1 mm thick TRIP steel sheets was performed by varying the pin length of a Si3N4 tool so as to stir or not a 0.1 mm thick Ni interlayer. Numerous complementary techniques were used to ...
Lire la suite >Friction stir lap processing of 1.1 mm thick TRIP steel sheets was performed by varying the pin length of a Si3N4 tool so as to stir or not a 0.1 mm thick Ni interlayer. Numerous complementary techniques were used to investigate the joints microstructure at its various length scales in order to deal on the one hand with the bond soundness, and on the other hand with the material flow, recrystallization, and phase transformations during processing. With short pin lengths, without Ni stirring, a poor diffusion bonding only occurs at the interlayer interfaces. With the longest probe, the reduced malleability of nickel, which played the role of a material flow marker, was inadequate for obtaining sound welds. Irrespective of the pin length, the nuggets microstructure was essentially α′ martensitic. The Ni stirring by the two longest pins gave rise to areas locally graded in both chemical composition and thus phase nature inside the nugget. A nickel gradation was even faced in some grains. A marked diffusion of Ni in the nugget stabilized austenite with a few micrometers grain size. At last, a thorough study of the fracture pattern of tensile shear samples explains the mechanical resistance of the various joints by their microstructural soundness. Some ways of optimization are finally proposed.Lire moins >
Lire la suite >Friction stir lap processing of 1.1 mm thick TRIP steel sheets was performed by varying the pin length of a Si3N4 tool so as to stir or not a 0.1 mm thick Ni interlayer. Numerous complementary techniques were used to investigate the joints microstructure at its various length scales in order to deal on the one hand with the bond soundness, and on the other hand with the material flow, recrystallization, and phase transformations during processing. With short pin lengths, without Ni stirring, a poor diffusion bonding only occurs at the interlayer interfaces. With the longest probe, the reduced malleability of nickel, which played the role of a material flow marker, was inadequate for obtaining sound welds. Irrespective of the pin length, the nuggets microstructure was essentially α′ martensitic. The Ni stirring by the two longest pins gave rise to areas locally graded in both chemical composition and thus phase nature inside the nugget. A nickel gradation was even faced in some grains. A marked diffusion of Ni in the nugget stabilized austenite with a few micrometers grain size. At last, a thorough study of the fracture pattern of tensile shear samples explains the mechanical resistance of the various joints by their microstructural soundness. Some ways of optimization are finally proposed.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
Université de Lille
CNRS
INRAE
ENSCL
CNRS
INRAE
ENSCL
Collections :
Équipe(s) de recherche :
Métallurgie Physique et Génie des Matériaux
Date de dépôt :
2024-08-28T10:56:27Z
2024-08-30T07:52:34Z
2024-08-30T07:52:34Z