Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/73562
Title: Investigation on the shrinkage behaviour of direct laser sintering Cu-based metallic powder
Authors: Zhu, H.
Fuh, J.Y.H. 
Lu, L. 
Keywords: Direct laser sintering
Metallic powder
Shrinkage behaviour
Issue Date: 2004
Source: 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
URI: http://scholarbank.nus.edu.sg/handle/10635/73562
ISBN: 1860584683
Appears in Collections:Staff Publications

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