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A three-dimensional finite element analysis of temperature field during laser melting of metal powders in additive layer manufacturing
journal contribution
posted on 2023-06-08, 14:02 authored by I A Roberts, C J Wang, R Esterlein, M Stanford, D J MynorsSimulating the transient temperature field in additive layer manufacturing (ALM) processes has presented a challenge to many researchers in the field. The transient temperature history is vital for determining the thermal stress distribution and residual stress states in ALM-processed parts that utilise a moving laser heat source. The modelling of the problem involving multiple layers is equally of great importance because the thermal interactions of successive layers affect the temperature gradients, which govern the heat transfer and thermal stress development mechanisms. This paper uses an innovative simulation technique known as element birth and death, in modelling the three-dimensional temperature field in multiple layers in a powder bed. The results indicate that the heated regions undergo rapid thermal cycles that could be associated with commensurate thermal stress cycles. Deposition of successive layers and subsequent laser scanning produces temperature spikes in previous layers. The resultant effect is a steady temperature build-up in the lower layers as the number of layers increases
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Publication status
- Published
File Version
- Published version
Journal
International Journal of Machine Tools and ManufactureISSN
0890-6955Publisher
ElsevierIssue
12-13Volume
49Page range
916-923Department affiliated with
- Engineering and Design Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-12-03First Compliant Deposit (FCD) Date
2013-07-08Usage metrics
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