The Influence of Preheating on Laser Beam Melting

Laser Beam Melting (LBM) represents an additive process where metallic components are generated layer-wise. A laser beam operates as heat source melting metal powder. The temperature level in the heat affected zone is considered as a critical issue and can be influenced by many parameters, e.g. the...

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Main Authors: Berger, Uwe, Merkel, Markus, Liebisch, Andreas
Other Authors: Proceedings of the 2nd International Conference on Progress in Additive Manufacturing (Pro-AM 2016)
Format: Conference or Workshop Item
Language:English
Published: 2016
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Online Access:https://hdl.handle.net/10356/84417
http://hdl.handle.net/10220/41809
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-844172020-09-24T20:13:05Z The Influence of Preheating on Laser Beam Melting Berger, Uwe Merkel, Markus Liebisch, Andreas Proceedings of the 2nd International Conference on Progress in Additive Manufacturing (Pro-AM 2016) Singapore Centre for 3D Printing Heated building chamber Residual stresses Laser Beam Melting (LBM) represents an additive process where metallic components are generated layer-wise. A laser beam operates as heat source melting metal powder. The temperature level in the heat affected zone is considered as a critical issue and can be influenced by many parameters, e.g. the laser power and the scanning velocity. Temperature levels out of a reliable range cause residual stresses, which might lead to fracture of the component. Many activities are applied to the additive manufacturing process to analyse, control and forecast the temperature level in the critical process zone. In this paper the temperature level is influenced by a heated plate, which is included in the building chamber of a SLM system. Components can be fabricated at an ambient temperature level up to 800°C. Temperature gradients can be reduced resulting in less residual stresses. Results are presented for aluminum alloy and steel. Residual stresses are computed by numerical simulation and measured by X-ray diffraction (XRD). The surfaces of specimen are analysed by tactile measurement. Published version 2016-12-12T05:34:40Z 2019-12-06T15:44:46Z 2016-12-12T05:34:40Z 2019-12-06T15:44:46Z 2016 Conference Paper Berger, U., Merkel, M., & Liebisch, A. (2016). The Influence of Preheating on Laser Beam Melting. Proceedings of the 2nd International Conference on Progress in Additive Manufacturing (Pro-AM 2016), 306-311. https://hdl.handle.net/10356/84417 http://hdl.handle.net/10220/41809 en © 2016 by Pro-AM 2016 Organizers. Published by Research Publishing, Singapore 6 p. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Heated building chamber
Residual stresses
spellingShingle Heated building chamber
Residual stresses
Berger, Uwe
Merkel, Markus
Liebisch, Andreas
The Influence of Preheating on Laser Beam Melting
description Laser Beam Melting (LBM) represents an additive process where metallic components are generated layer-wise. A laser beam operates as heat source melting metal powder. The temperature level in the heat affected zone is considered as a critical issue and can be influenced by many parameters, e.g. the laser power and the scanning velocity. Temperature levels out of a reliable range cause residual stresses, which might lead to fracture of the component. Many activities are applied to the additive manufacturing process to analyse, control and forecast the temperature level in the critical process zone. In this paper the temperature level is influenced by a heated plate, which is included in the building chamber of a SLM system. Components can be fabricated at an ambient temperature level up to 800°C. Temperature gradients can be reduced resulting in less residual stresses. Results are presented for aluminum alloy and steel. Residual stresses are computed by numerical simulation and measured by X-ray diffraction (XRD). The surfaces of specimen are analysed by tactile measurement.
author2 Proceedings of the 2nd International Conference on Progress in Additive Manufacturing (Pro-AM 2016)
author_facet Proceedings of the 2nd International Conference on Progress in Additive Manufacturing (Pro-AM 2016)
Berger, Uwe
Merkel, Markus
Liebisch, Andreas
format Conference or Workshop Item
author Berger, Uwe
Merkel, Markus
Liebisch, Andreas
author_sort Berger, Uwe
title The Influence of Preheating on Laser Beam Melting
title_short The Influence of Preheating on Laser Beam Melting
title_full The Influence of Preheating on Laser Beam Melting
title_fullStr The Influence of Preheating on Laser Beam Melting
title_full_unstemmed The Influence of Preheating on Laser Beam Melting
title_sort influence of preheating on laser beam melting
publishDate 2016
url https://hdl.handle.net/10356/84417
http://hdl.handle.net/10220/41809
_version_ 1681058375416152064