Review on volumetric energy density: inluence on morphology and mechanical properties of Ti6Al4V manufactured via laser powder bed fusion

Buhairi, Minhalina Ahmad and Mohd Foudzi, Farhana and Jamhari, Fathin Iliana and Sulong, Abu Bakar and Mohd Radzuan, Nabilah Afiqah and Muhamad, Norhamidi and Mohamed, Intan Fadhlina and Azman, Abdul Hadi and Wan Sharuzi, Wan Harun and M.S.H., Al-Furjan (2023) Review on volumetric energy density: inluence on morphology and mechanical properties of Ti6Al4V manufactured via laser powder bed fusion. Progress in Additive Manufacturing, 8 (2). pp. 265-283. ISSN 23639512. (Published)

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Various laser powder bed fusion (LPBF) process parameters must be considered as they can independently affect the properties of end-product. However, many studies simply examine one or two LPBF process parameters. Laser power, scan speed, scan spacing, and layer height are the four primary LPBF process parameters that contribute to volumetric energy density (VED) used in LPBF. VED is often used as an optimization metric for LPBF process parameters, because it takes all four major parameters into consideration. Thus, this paper focuses on the effect of VED on the morphology and properties of part, and also discusses on the interrelationship between all four parameters. Common range used for each parameter is 70–400 W for laser power, 70–1800 mm/s for scan speed, 50–140 µm for scan spacing, and 20–50 µm for layer height. It can be seen as the VED increased, the microstructure of as-built titanium alloy Ti6Al4V components exhibited smaller α’ martensite size and larger columnar β grain. High VED can also reduce porosity and defect formation, which will help in increasing part density. The lowest surface roughness reported for LPBF Ti6Al4V is 4.91 µm. Meanwhile, the maximum microhardness obtained is 443 HV and the highest tensile strength achieved is 1400 MPa. The VED used for studies that obtained these results are in the range of 55–65 J/mm3. Thus, it can be concluded that the most suitable VED for LPBF printing of Ti6Al4V is around 55–65 J/mm3.

Item Type: Article
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Laser powder bed fusion; Mechanical properties; Morphology; Process parameters; Ti6Al4V; Volumetric energy density
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Faculty/Division: Faculty of Mechanical Engineering
Depositing User: Mr Muhamad Firdaus Janih@Jaini
Date Deposited: 12 Sep 2023 04:15
Last Modified: 12 Sep 2023 04:15
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