Evaluation of Heat Treatment Parameters on Microstructure and Hardness Properties of High-Speed Selective Laser Melted Ti6Al4V
Autor: | Paul M Lekoadi, Bathusile N Masina, Monnamme Tlotleng, Kofi Ahomkah Annan, Nthabiseng Maledi |
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Rok vydání: | 2021 |
Předmět: |
lcsh:TN1-997
Materials science microstructure 02 engineering and technology 01 natural sciences law.invention law Phase (matter) 0103 physical sciences Ultimate tensile strength General Materials Science Lamellar structure Selective laser melting Composite material residence time lcsh:Mining engineering. Metallurgy 010302 applied physics heat treatment cooling method Metals and Alloys temperature Titanium alloy 021001 nanoscience & nanotechnology Microstructure Laser hardness selective laser melting Martensite 0210 nano-technology |
Zdroj: | Metals, Vol 11, Iss 255, p 255 (2021) Metals Volume 11 Issue 2 |
ISSN: | 2075-4701 |
DOI: | 10.3390/met11020255 |
Popis: | This study presents the investigation on how heat treatment parameters, which are temperature, cooling method, and residence time, influence the microstructural and hardness properties of Ti6Al4V components produced on Ti6Al4V substrate using high speed selective laser melting technique. Heat treatment was performed on the produced samples before they were characterized for microstructure and hardness. The microstructure of the as-built sample contained large columnar β-grains that were filled with martensite α’ phase and had a high hardness of 383 ± 13 HV. At 1000 °C and residence time of maximum 4 h, better heat treatment parameters were seen for the selective laser melting (SLM) produced Ti6Al4V sample since an improved lamellar α + β microstructure was obtained at this condition. This microstructure is known to have improved tensile properties. |
Databáze: | OpenAIRE |
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