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]

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]

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 >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Métallurgie Physique et Génie des Matériaux

Submission date :

2020-10-04T13:17:05Z
2020-10-08T08:06:55Z