Fatigue life improvement of 7075 aluminium ...
Document type :
Autre communication scientifique (congrès sans actes - poster - séminaire...): Communication dans un congrès sans actes
Permalink :
Title :
Fatigue life improvement of 7075 aluminium alloy produced by laser powder bed fusion (L-PBF).
Author(s) :
Nothomb, N [Auteur]
Institute of Mechanics, Materials and Civil Engineering [Louvain] [IMMC]
Longin, J [Auteur]
Institute of Mechanics, Materials and Civil Engineering [Louvain] [IMMC]
Rodriguez-Barber, I [Auteur]
Institute IMDEA Materials [Madrid]
Perez-Prado, M.T. [Auteur]
Institute IMDEA Materials [Madrid]
Avettand-Fènoël, Marie-NoËlle [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Simar, Aude [Auteur]
Institute of Mechanics, Materials and Civil Engineering [Louvain] [IMMC]
Institute of Mechanics, Materials and Civil Engineering [Louvain] [IMMC]
Longin, J [Auteur]
Institute of Mechanics, Materials and Civil Engineering [Louvain] [IMMC]
Rodriguez-Barber, I [Auteur]
Institute IMDEA Materials [Madrid]
Perez-Prado, M.T. [Auteur]
Institute IMDEA Materials [Madrid]
Avettand-Fènoël, Marie-NoËlle [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Simar, Aude [Auteur]
Institute of Mechanics, Materials and Civil Engineering [Louvain] [IMMC]
Conference title :
3rd European Conference on the Structural Integrity of Additively Manufactured Materials (ESIAM23)
City :
Porto
Country :
Portugal
Start date of the conference :
2023-09
HAL domain(s) :
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]
English abstract : [en]
One of the main drawbacks of Laser Powder Bed Fusion (L-PBF) is the limited material palette currently available and the often poor fatigue performance of the resulting parts. Currently, the only high-performance aluminium ...
Show more >One of the main drawbacks of Laser Powder Bed Fusion (L-PBF) is the limited material palette currently available and the often poor fatigue performance of the resulting parts. Currently, the only high-performance aluminium alloy manufacturable by L-PBF and adapted for the aerospace industry is Scalmalloy®. Moreover, this alloy uses Scandium as an alloying element which should be avoided due to its very high price. The production of parts using more conventional 7xxx aluminium alloys with the L-PBF technology is not yet fully controlled. In this study, static mechanical properties as well as fatigue performances of an Al7075 modified to avoid hot cracking manufactured by L-PBF will be analysed. First, ZrH2 addition to the Al7075 powder allows obtaining nearly fully dense parts without cracking: 99.9% relative density computed using X-Ray tomography. Afterwards, an optimised heat treatment is applied to this alloy to enhance its mechanical performances and reach a yield strength of 510MPa by controlling Cu, Mg, Zn and Zr precipitation. Finally, as fatigue performances of L-PBF alloys are usually poor, friction stir processing was applied as a post-treatment to suppress the main part of the porosities and improve fatigue performances. Indeed, friction stir processing has been proven as a very successful post-processing method to increase the fatigue life of AlSi10Mg by a factor of 100.Show less >
Show more >One of the main drawbacks of Laser Powder Bed Fusion (L-PBF) is the limited material palette currently available and the often poor fatigue performance of the resulting parts. Currently, the only high-performance aluminium alloy manufacturable by L-PBF and adapted for the aerospace industry is Scalmalloy®. Moreover, this alloy uses Scandium as an alloying element which should be avoided due to its very high price. The production of parts using more conventional 7xxx aluminium alloys with the L-PBF technology is not yet fully controlled. In this study, static mechanical properties as well as fatigue performances of an Al7075 modified to avoid hot cracking manufactured by L-PBF will be analysed. First, ZrH2 addition to the Al7075 powder allows obtaining nearly fully dense parts without cracking: 99.9% relative density computed using X-Ray tomography. Afterwards, an optimised heat treatment is applied to this alloy to enhance its mechanical performances and reach a yield strength of 510MPa by controlling Cu, Mg, Zn and Zr precipitation. Finally, as fatigue performances of L-PBF alloys are usually poor, friction stir processing was applied as a post-treatment to suppress the main part of the porosities and improve fatigue performances. Indeed, friction stir processing has been proven as a very successful post-processing method to increase the fatigue life of AlSi10Mg by a factor of 100.Show less >
Language :
Anglais
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
CNRS
INRAE
ENSCL
CNRS
INRAE
ENSCL
Collections :
Research team(s) :
Métallurgie Physique et Génie des Matériaux
Submission date :
2023-12-17T15:08:05Z
2023-12-18T10:46:50Z
2023-12-18T10:46:50Z