Process repeatability and sources of error in indirect SLS of aluminium

Hopkinson, Neil and Sercombe, T. B. (2008) Process repeatability and sources of error in indirect SLS of aluminium. Rapid Prototyping Journal, 14 2: 108-113. doi:10.1108/13552540810862073


Author Hopkinson, Neil
Sercombe, T. B.
Title Process repeatability and sources of error in indirect SLS of aluminium
Journal name Rapid Prototyping Journal   Check publisher's open access policy
ISSN 1355-2546
1758-7670
Publication date 2008-01-01
Sub-type Article (original research)
DOI 10.1108/13552540810862073
Volume 14
Issue 2
Start page 108
End page 113
Total pages 6
Place of publication Bingley, W. Yorks., United Kingdom
Publisher Emerald Group Publishing
Language eng
Formatted abstract
Purpose – The purpose of this paper is to investigate the accuracy and repeatability of the indirect selective laser sintering of aluminium process.

Design/methodology/approach – This work characterised the shrinkage of indirect SLS aluminium parts during the various stages of production. Standard scale parts were measured using a Giddings and Lewis co-ordinate measuring machine in both the green and infiltrated condition.

Findings – The experiments conducted show that most accuracy is lost during the furnace cycle and that the greatest loss of accuracy occurred in the Z dimension. Additionally the position of parts within the part bed in both X, Y and Z is shown to influence accuracy, with smaller parts being built closer to the edge of the bed later in the build. These results have been interpreted as being a result of the phenomenon of “Z-growth”. Finally, the research shows that the overall accuracy of the indirect selective laser sintering of aluminium process is comparable with many existing processes such as investment casting.

Originality/value – Before any new material can be accepted, there is a need to not only fully characterise the dimensional accuracy attainable, but also to gain a thorough understanding of the processes that contribute to the inaccuracies. This paper addresses this need.
Keyword Sintering
Lasers
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 03 Sep 2009, 20:12:53 EST by Mr Andrew Martlew on behalf of Materials