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|Title:||Investigation on the shrinkage behaviour of direct laser sintering Cu-based metallic powder|
|Keywords:||Direct laser sintering|
|Citation:||Zhu, H.,Fuh, J.Y.H.,Lu, L. (2004). Investigation on the shrinkage behaviour of direct laser sintering Cu-based metallic powder. ICMA 2004 - Proceedings of the International Conference on Manufacturing Automation: Advanced Design and Manufacturing in Global Competition : 811-817. ScholarBank@NUS Repository.|
|Abstract:||Inaccuracy in direct laser sintering of metallic powder is caused by many factors. It is a severe issue that restricts the application of this process. Theoretical analysis and experimental study on shrinkage behaviour of direct laser sintering Cu-based metallic powder is reported in this paper. It was found that shrinkage is anisotropic; the shrinkage in the z (height) direction as well as the dimensional changes in-plane (x, y directions) are a combination of three sources: thermal shrinkage, sintering shrinkage, and expansion caused by the metal particles falling down during the sintering. A hypothesis 2-D model is proposed to explain the expansion phenomenon . The experimental results strongly support the hypothesis. Since the shrinkage in z direction can be compensated by the later deposited powder, the dimension can be controlled to high precision if the shrinkage in plane can be controlled well.|
|Source Title:||ICMA 2004 - Proceedings of the International Conference on Manufacturing Automation: Advanced Design and Manufacturing in Global Competition|
|Appears in Collections:||Staff Publications|
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