Influence of grinding and shot-peening on the near-surface microstructure of a maraging stainless steel
Charline Le Nué
(1)
,
Alexis Deschamps
(1)
,
Frédéric Danoix
(2)
,
Frédéric de Geuser
(1)
,
Gilles Renou
(1)
,
Marc Verdier
(1)
,
Thomas Billot
(3)
,
Nicolas Binot
(3)
,
Corentin Dides
(4)
Alexis Deschamps
- Fonction : Auteur
- PersonId : 15431
- IdHAL : alexis-deschamps
- ORCID : 0000-0002-6038-9201
- IdRef : 08185966X
Frédéric Danoix
- Fonction : Auteur
- PersonId : 174461
- IdHAL : frederic-danoix
- ORCID : 0000-0003-0511-9038
- IdRef : 131439146
Frédéric de Geuser
- Fonction : Auteur
- PersonId : 7107
- IdHAL : frederic-de-geuser
- ORCID : 0000-0002-2974-9432
- IdRef : 098447432
Marc Verdier
- Fonction : Auteur
- PersonId : 742072
- IdHAL : marc-verdier
- ORCID : 0000-0003-0563-2675
- IdRef : 123967678
Résumé
The near-surface properties of maraging steels are key to controlling their mechanical properties. They can be tailored by surface treatments such as shot peening and can also be influenced by prior machining. This study aims at determining the respective roles of grinding and shot peening processes on the near-surface microstructure of Custom 465 maraging stainless steel. A combination of experimental techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM), and atom probe tomography (APT) provides an in-depth characterization of the initial microstructure and its modifications. The results show that grinding results in a very shallow nano-crystalline region less than 1 μm thick, which contains a high fraction of retained austenite and where most Ni 3 Ti precipitates initially present, have been dissolved. Shot peening, on the other hand, results in a moderate localized strain close to the surface, and in a deeper destabilization of the retained austenite initially present, which decreases from ∼5% to ∼2% in the first 100 μm below the surface. It has no visible effect on the precipitate microstructures. The different mechanisms that may cause these modifications are discussed.
Domaines
Sciences de l'ingénieur [physics]Format du dépôt | Fichier |
---|---|
Type de dépôt | Article dans une revue |
Titre |
en
Influence of grinding and shot-peening on the near-surface microstructure of a maraging stainless steel
|
Résumé |
en
The near-surface properties of maraging steels are key to controlling their mechanical properties. They can be tailored by surface treatments such as shot peening and can also be influenced by prior machining. This study aims at determining the respective roles of grinding and shot peening processes on the near-surface microstructure of Custom 465 maraging stainless steel. A combination of experimental techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM), and atom probe tomography (APT) provides an in-depth characterization of the initial microstructure and its modifications. The results show that grinding results in a very shallow nano-crystalline region less than 1 μm thick, which contains a high fraction of retained austenite and where most Ni 3 Ti precipitates initially present, have been dissolved. Shot peening, on the other hand, results in a moderate localized strain close to the surface, and in a deeper destabilization of the retained austenite initially present, which decreases from ∼5% to ∼2% in the first 100 μm below the surface. It has no visible effect on the precipitate microstructures. The different mechanisms that may cause these modifications are discussed.
|
Auteur(s) |
Charline Le Nué
1
, Alexis Deschamps
1
, Frédéric Danoix
2
, Frédéric de Geuser
1
, Gilles Renou
1
, Marc Verdier
1
, Thomas Billot
3
, Nicolas Binot
3
, Corentin Dides
4
1
SIMaP -
Science et Ingénierie des Matériaux et Procédés
( 1043114 )
- 1130 rue de la Piscine, BP 75 38402 Saint Martin D'Hères
- France
2
GPM -
Groupe de physique des matériaux
( 970 )
- Avenue de l'Université, BP 08, 76801 Saint-Etienne-du-Rouvray Cedex
- France
3
SAFRAN Landing Systems
( 469296 )
- France
4
IRT M2P -
Institut de recherche technologique Matériaux Métallurgie et Procédés
( 549864 )
- Bâtiment CIRAM
4, rue Augustin Fresnel
57070 Metz
- France
|
Langue du document |
Anglais
|
Nom de la revue |
|
Vulgarisation |
Non
|
Comité de lecture |
Oui
|
Audience |
Internationale
|
Date de publication |
2021-12
|
Volume |
20
|
Page/Identifiant |
101220
|
Domaine(s) |
|
Projet(s) ANR |
|
DOI | 10.1016/j.mtla.2021.101220 |
Fichier principal
145 Materialia 20 (2021) 101220 C. Le Nué, A. Deschamps, F. Danoix, F. De Geuser,... Influence of grinding and shot-peening on the near-surface microstructure of a maraging stainless steel.pdf ( 5.35 Mo
)
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