CobaltMaghrebV1, Maroc, Analysis, bibRecord, 000079

Cobalt-based superalloy layers deposited on X38CrMoV5 steel base metal by explosion cladding process

Identifieur interne : 000079 ( Maroc/Analysis ); précédent : 000078; suivant : 000080

Cobalt-based superalloy layers deposited on X38CrMoV5 steel base metal by explosion cladding process

Auteurs : S. Ettaqi [Maroc] ; L. Langlois [France] ; R. Bigot [France]

Source :

Surface & coatings technology [ 0257-8972 ] ; 2008.

RBID : Pascal:08-0244538

Descripteurs français

Pascal (Inist)
- Superalliage, Explosion, Interface, Microstructure, Traitement surface.

English descriptors

KwdEn :
- Explosions, Interfaces, Microstructure, Superalloys, Surface treatments.

Abstract

A grade 25 cobalt-based superalloy in the form of a sheet 5 mm in thickness and a steel substrate of type X38CrMoV5 are joined by explosion cladding. The macrostructure and microstructure of the interface and of the Co-based superalloy layers are studied. The interface presents the form of wavelets with a period of 1000 μm and an amplitude of 250 μm. The superalloy grains are deformed during the cladding process with several slip systems appearing. Near to the interface, the superalloy grains elongate and tend to follow the geometry of the interface. Observation with a scanning electron microscope (SEM) reveals zones of localised fusion at the interface. The EDS analysis shows that these fusion zones are the result of mixing between the base and cladding plates. Radiocrystallographic analysis by X-ray diffraction reveals the presence of the f.c.c cobalt in the cobalt-based superalloy layer. Thus cobalt retains its crystallographic structure (f.c.c) after cladding process. Hardness is evaluated with reference to microstructure. Near the interface, the hardness of the superalloy is of the order of 600 HV₁ kg. In the remainder of the thickness, hardness is of the order of 500 HV₁ kg, being greater than that of the unplated superalloy (270 HV₁ kg). The track obtained by an indentation test at the interface under a load of 100 kg exhibits no cracking. This tends to prove the good metallurgical bond at the interface.

Affiliations:

Links toward previous steps (curation, corpus...)

to stream PascalFrancis, to step Corpus: 000131
to stream PascalFrancis, to step Curation: 000164
to stream PascalFrancis, to step Checkpoint: 000136
to stream Main, to step Merge: 000802
to stream Main, to step Curation: 000794
to stream Main, to step Exploration: 000794
to stream Maroc, to step Extraction: 000079

Links to Exploration step

Pascal:08-0244538

Le document en format XML

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<front><div type="abstract" xml:lang="en">A grade 25 cobalt-based superalloy in the form of a sheet 5 mm in thickness and a steel substrate of type X38CrMoV5 are joined by explosion cladding. The macrostructure and microstructure of the interface and of the Co-based superalloy layers are studied. The interface presents the form of wavelets with a period of 1000 μm and an amplitude of 250 μm. The superalloy grains are deformed during the cladding process with several slip systems appearing. Near to the interface, the superalloy grains elongate and tend to follow the geometry of the interface. Observation with a scanning electron microscope (SEM) reveals zones of localised fusion at the interface. The EDS analysis shows that these fusion zones are the result of mixing between the base and cladding plates. Radiocrystallographic analysis by X-ray diffraction reveals the presence of the f.c.c cobalt in the cobalt-based superalloy layer. Thus cobalt retains its crystallographic structure (f.c.c) after cladding process. Hardness is evaluated with reference to microstructure. Near the interface, the hardness of the superalloy is of the order of 600 HV<sub>1</sub>
 kg. In the remainder of the thickness, hardness is of the order of 500 HV<sub>1</sub>
 kg, being greater than that of the unplated superalloy (270 HV<sub>1</sub>
 kg). The track obtained by an indentation test at the interface under a load of 100 kg exhibits no cracking. This tends to prove the good metallurgical bond at the interface.</div>
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Cobalt-based superalloy layers deposited on X38CrMoV5 steel base metal by explosion cladding process

Cobalt-based superalloy layers deposited on X38CrMoV5 steel base metal by explosion cladding process

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri