Electron beam melting of gamma titanium aluminide and investigating the effect of EBM layer orientation on milling performance

Electron beam melting (EBM) is one of the growing processes of additive manufacturing technology (AMT) to fabricate 3D parts from various difficult-to-process materials such as titanium alloys. A major limitation of the EBM process is the poor surface finish of the produced parts which ultimately de...

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Veröffentlicht in:International journal of advanced manufacturing technology 2018-06, Vol.96 (9-12), p.3093-3107
Hauptverfasser: Anwar, Saqib, Ahmed, Naveed, Abdo, Basem M., Pervaiz, Salman, Chowdhury, M. A. K., Alahmari, Abdulrahman M.
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container_end_page 3107
container_issue 9-12
container_start_page 3093
container_title International journal of advanced manufacturing technology
container_volume 96
creator Anwar, Saqib
Ahmed, Naveed
Abdo, Basem M.
Pervaiz, Salman
Chowdhury, M. A. K.
Alahmari, Abdulrahman M.
description Electron beam melting (EBM) is one of the growing processes of additive manufacturing technology (AMT) to fabricate 3D parts from various difficult-to-process materials such as titanium alloys. A major limitation of the EBM process is the poor surface finish of the produced parts which ultimately demands a subsequent subtractive method (secondary finishing operation) to improve the surface finish for shaping the part to be fit for-end use applications where high surface finish is commonly required. With respect to the EBM layer build direction, the fabricated part has different orientations with varying surface characteristics. Therefore, in order to perform secondary finishing operation (e.g., milling) there are different choices of EBM part orientation to select the direction of tool feed. In this research, 3D parts of titanium alloy (gamma titanium aluminide; γ-TiAl) are additively manufactured through EBM process. The effect of EBM layer/part orientation on the milling performance is further investigated in terms of surface finish improvement and edge chipping evaluation. It has been observed that the EBM layer/part orientation with respect to milling tool feed direction (TFD) plays a vital role in milling performance. Thus, a care must be taken to select the appropriate tool feed direction and layer/part orientation in order to achieve maximum surface finish with minimum edge chipping. The results revealed the vertical milling can be adopted as a secondary finishing operation to be performed on EBM produced parts of γ-TiAl and it allows to significantly improve the poor surface finish generated by EBM ( R a 31 μm). Furthermore, among the available part orientation choices, the part orientation in which the milling tool is fed across the EBM layer build direction is the best orientation resulting into high surface finish ( R a 0.12 μm) with relatively smooth edges (minimum chipping-off).
doi_str_mv 10.1007/s00170-018-1802-7
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source SpringerNature Journals
subjects Additive manufacturing
CAE) and Design
Chipping
Computer-Aided Engineering (CAD
Electron beam melting
Engineering
Feed direction
Finishing
Industrial and Production Engineering
Intermetallic compounds
Materials selection
Mechanical Engineering
Media Management
Orientation effects
Original Article
Surface finish
Surface properties
Titanium alloys
Titanium aluminides
Titanium base alloys
title Electron beam melting of gamma titanium aluminide and investigating the effect of EBM layer orientation on milling performance
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