| Issue |
MATEC Web Conf.
Volume 321, 2020
The 14th World Conference on Titanium (Ti 2019)
|
|
|---|---|---|
| Article Number | 03020 | |
| Number of page(s) | 15 | |
| Section | Additive and Near Net Shape Manufacturing | |
| DOI | https://doi.org/10.1051/matecconf/202032103020 | |
| Published online | 12 October 2020 | |
Direct Laser Additive Manufacturing of TiAl Intermetallic Compound by Powder Directed Energy Deposition (DED)
a IREPA LASER, Parc d’Innovation, 67400 Illkirch, France
b ONERA, DMAS, The French Aerospace Lab, Université Paris-Saclay, 92322 Châtillon, France
Directed Energy Deposition of the commercial intermetallic Ti-48Al-2Cr-2Nb alloy was investigated. The CLAD® process is dependent on multiple parameters, which were successfully optimised through several experiments, including series of beads, small blocks, and massive blocks, under argon atmosphere. The use of adapted temperature management leads to massive blocks manufacturing that bear no apparent macroscopic defects, such as cracks, which are generally observed in this brittle material due to strong temperature cycling during the manufacturing. The microstructure and geometrical parameters were characterised by scanning electron microscopy (SEM). This process generates an ultra-fine and anisotropic microstructure, which is restored to a homogeneous duplex microstructure by a subsequent heat-treatment. Mechanical characterisation is in progress and will be used to validate the soundness of the materials produced in these conditions.
© The Authors, published by EDP Sciences, 2020
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