| Issue |
MATEC Web Conf.
Volume 370, 2022
2022 RAPDASA-RobMech-PRASA-CoSAAMI Conference - Digital Technology in Product Development - The 23rd Annual International RAPDASA Conference joined by RobMech, PRASA and CoSAAMI
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| Article Number | 03010 | |
| Number of page(s) | 13 | |
| Section | Material Development | |
| DOI | https://doi.org/10.1051/matecconf/202237003010 | |
| Published online | 01 December 2022 | |
Microstructure and Micro-Hardness Properties of In-Situ LENS Fabricated Ti-Al-Si-xV Alloys
1 Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Staatsartillerie Road, Pretoria West, Pretoria, South Africa
2 Department of Metallurgical Engineering, Yaba College of Technology, P.M.B. 2011 Yaba, Lagos, Nigeria
3 National Laser Centre, Council for Scientific and Industrial Research (NLC-CSIR), Meiring Naude Road, Pretoria, South Africa
4 Department of Electrical Engineering, Centre for Energy and Electric Power (CEEP), Tshwane University of Technology, Staatsartillerie Road, Pretoria West, Pretoria, South Africa
5 Department of Mechanical Engineering Science, University of Johannesburg, Auckland Park Campus, Johannesburg, South Africa
* Corresponding author: RajiSA@tut.ac.za; rajisadiqa@gmail.com
This study presents laser in-situ alloying of Ti-Al-Si-xV alloys fabricated using the laser engineered net shaping (LENS) machine from elemental powders. The as-built samples were subjected to heat treatment at 1200°C, 1300°C, and 1400°C for 1 hour and furnace cooled (FC) with subsequent homogenization heat treatment at 950°C for 6 hours and FC. The microstructure was characterized by scanning electron microscopy (SEM) equipped with an electron dispersion spectroscopy (EDS). The micro-hardness properties were evaluated with the Vickers hardness tester. The results showed that alloying via in-situ powder deposition followed by heat treatment is practicable for the producing TiAl-based alloys with improved mechanical properties.
© The Authors, published by EDP Sciences, 2022
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