Effects of tantalum addition on microstructure and properties of titanium alloy fabricated by laser powder bed fusion

2021 ◽  
Vol 28 (4) ◽  
pp. 1111-1128
Author(s):  
Li-bo Zhou ◽  
Jing-guo Shu ◽  
Jin-shan Sun ◽  
Jian Chen ◽  
Jian-jun He ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Microstructure And Properties

scholarly journals On the in situ elimination of pores during laser powder bed fusion of a titanium alloy

2021 ◽  
Author(s):  
ling zhang ◽  
Wenhe Liao ◽  
Tingting Liu ◽  
Huiliang Wei ◽  
Changchun Zhang
Keyword(s):  
Titanium Alloy ◽  
Real Time ◽  
Laser Power ◽  
Layer By Layer ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Printing Quality ◽  
High Laser

Abstract The printing quality of the laser powder bed fusion (LPBF) components largely depends on the presence of various defects such as massive porosity. Thus, the efficient elimination of pores is an important factor to the production of a sound LPBF product. In this work, the efficacy of two in situ laser remelting approaches on the elimination of pores during LPBF of a titanium alloy Ti-6.5Al-3.5Mo-l.5Zr-0.3Si (TC11) were assessed using both experimental and computational methods. These two remelting methods are the surface remelting, and the layer-by-layer printing and remelting. A multi-track and multi-layer phenomenological model was established to compute the evolution of pores with the temperature and velocity fields. The results showed that surface remelting with a high laser power such as 180 W laser can effectively eliminate pores within three deposited layers. However, such a remelting cannot reach defects in deeper regions. Alternatively, the layer-by-layer remelting with a laser power of 180 W can effectively eliminate the pores formed in the previous layer in real time. The results obtained from this work can provide useful guidance for the in situ control of printing defects supported by the real time monitoring, feedback and operation systems of the intelligent LPBF equipment.

scholarly journals On the in situ elimination of pores during laser powder bed fusion of a titanium alloy

2021 ◽  
Keyword(s):  
Titanium Alloy ◽  
Full Text ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed

Abstract The full text of this preprint has been withdrawn by the authors while they make corrections to the work. Therefore, the authors do not wish this work to be cited as a reference. Questions should be directed to the corresponding author.

Effects of Nb and Mo on the microstructure and properties of 420 stainless steel processed by laser-powder bed fusion

2019 ◽  
Vol 28 ◽  
pp. 682-691 ◽  
Author(s):  
Subrata Deb Nath ◽  
Emma Clinning ◽  
Gautam Gupta ◽  
Vincent Wuelfrath-Poirier ◽  
Gilles L’Espérance ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Microstructure And Properties

Effect of Friction on Compression Test of Ti-6Al-4V with Open-Cellular Structure

2020 ◽  
Vol 299 ◽  
pp. 452-456
Author(s):  
Yuri N. Loginov ◽  
Anton I. Golodnov ◽  
Stepan I. Stepanov
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Titanium Alloy ◽  
Compression Test ◽  
Cellular Structure ◽  
Strain State ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
The Finite Element Method ◽  
Powder Bed

The compression test data are represented for a cellular Ti-6Al-4V titanium alloy, manufactured using laser powder bed fusion on EOSINT 280. The inhomogeneity of deformation was revealed in the form of a barrel of the side surfaces during the test. The problem was simulated by the finite element method for two formulations: the compression of cellular material with friction and without friction. A comparison of the stress-strain state of the two cases was made. The same inhomogeneity of deformation is achieved, both in the experiment and in the analytical solution.

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