Heat treatment possibilities for an in ...
Document type :
Article dans une revue scientifique: Article original
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Title :
Heat treatment possibilities for an in situ βTi-TiC composite made by laser powder bed fusion
Author(s) :
Dadbakhsh, Sasan [Auteur]
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
Mertens, Raya [Auteur]
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
Ji, Gang [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Unité Matériaux et Transformations (UMET) - UMR 8207
Vrancken, Bey [Auteur]
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
Vanmeensel, Kim [Auteur]
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
Fan, Haiyang [Auteur]
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
Addad, Ahmed [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Unité Matériaux et Transformations (UMET) - UMR 8207
Kruth, Jean-Pierre [Auteur]
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
Mertens, Raya [Auteur]
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
Ji, Gang [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Unité Matériaux et Transformations (UMET) - UMR 8207
Vrancken, Bey [Auteur]
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
Vanmeensel, Kim [Auteur]
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
Fan, Haiyang [Auteur]
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
Addad, Ahmed [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Unité Matériaux et Transformations (UMET) - UMR 8207
Kruth, Jean-Pierre [Auteur]
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
Journal title :
Additive Manufacturing
Pages :
101577
Publisher :
Elsevier BV
Publication date :
2020-12
ISSN :
2214-8604
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]
After laser powder bed fusion (LPBF) of an ultra-strong in situ TiC whisker reinforced β-Ti composite, this paper investigates the evolution of microstructure and mechanical properties in response to heat treatment at ...
Show more >After laser powder bed fusion (LPBF) of an ultra-strong in situ TiC whisker reinforced β-Ti composite, this paper investigates the evolution of microstructure and mechanical properties in response to heat treatment at different temperatures. Using in depth nano-SEM and TEM analyses, it is shown that ageing at 400 °C rounds the whiskers, annihilates the strain fields and grows Mo segregated nano-cells, but without improving the ductility. In contrast, ageing at 600 °C enables the transformation of metastable β to a lamellar β + α, leading to a dual phase matrix embedding TiC particles. This is in such a manner that extra ageing at 600 °C coalesces the nano-lamellar α + β microstructure to form a coarser micro-lamellar α + β matrix. This microstructure achieves 66 % of the compressive deformation of Cp-Ti, and over 1400 MPa compressive strength after 1 h of ageing at 600 °C. Despite this success under compression, hard and stiff TiC particles may still cause large spherical fractured voids, severely limiting the plastic deformation under tension.Show less >
Show more >After laser powder bed fusion (LPBF) of an ultra-strong in situ TiC whisker reinforced β-Ti composite, this paper investigates the evolution of microstructure and mechanical properties in response to heat treatment at different temperatures. Using in depth nano-SEM and TEM analyses, it is shown that ageing at 400 °C rounds the whiskers, annihilates the strain fields and grows Mo segregated nano-cells, but without improving the ductility. In contrast, ageing at 600 °C enables the transformation of metastable β to a lamellar β + α, leading to a dual phase matrix embedding TiC particles. This is in such a manner that extra ageing at 600 °C coalesces the nano-lamellar α + β microstructure to form a coarser micro-lamellar α + β matrix. This microstructure achieves 66 % of the compressive deformation of Cp-Ti, and over 1400 MPa compressive strength after 1 h of ageing at 600 °C. Despite this success under compression, hard and stiff TiC particles may still cause large spherical fractured voids, severely limiting the plastic deformation under tension.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
CNRS
INRA
ENSCL
CNRS
INRA
ENSCL
Collections :
Research team(s) :
Métallurgie Physique et Génie des Matériaux
Submission date :
2020-10-04T13:17:05Z
2020-10-08T08:06:55Z
2020-10-08T08:06:55Z
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