Evaluation of Support Structure Removability for Additively Manufactured Ti6Al4V Overhangs via Electron Beam Melting

被引:9
作者
Ameen, Wadea [1 ,2 ]
Mohammed, Muneer Khan [2 ]
Al-Ahmari, Abdulrahman [1 ,2 ]
机构
[1] King Saud Univ, Ind Engn Dept, POB 800, Riyadh 11421, Saudi Arabia
[2] King Saud Univ, Adv Mfg Inst, Raytheon Chair Syst Engn RCSE Chair, POB 800, Riyadh 11421, Saudi Arabia
关键词
additive manufacturing; support structures; electron beam melting; support structure removability; DESIGN;
D O I
10.3390/met9111211
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The addition of support structures is essential for the successful fabrication of overhang structures through additive manufacturing (AM). The support structures protect the overhang portion from distortions. They are fabricated with the functional parts and are removed later after the fabrication of the AM part. While structures bearing insufficient support result in defective overhangs, structures with excessive support result in higher material consumption, time and higher post-processing costs. The objective of this study is to investigate the effects of design and process parameters of support structures on support removability during the electron beam melting (EBM)-based additive manufacturing of the Ti6Al4V overhang part. The support design parameters include tooth parameters, no support offset, fragmentation parameters and perforation parameters. The EBM process parameters consist of beam current, beam scan speed and beam focus offset. The results show that both support design and process parameters have a significant effect on support removability. In addition, with the appropriate selection of design and process parameters, it is possible to significantly reduce the support removal time and protect the surface quality of the part.
引用
收藏
页数:14
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