Change search
ReferencesLink to record
Permanent link

Direct link
Selective Laser Melting of Ni-based Superalloys: High Speed Imaging and Process Optimisation
Luleå University of Technology, Department of Engineering Sciences and Mathematics.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Additive manufacturing is the process of joining or adding material to build an object from 3D model data. Selective Laser Melting (SLM) is an additive manufacturing technology that generates components layer by layer. Though it is already being used in the industry, some aspects are not very well understood. In this thesis, high speed imaging is used to gain new insights about the interaction of laser light with material. A number of parameter sets for high e ciency and good surface finish were found for a nickel based superalloy, HastelloyXTM. Three setups are discussed: single laser pulse interaction with powder, low speed SLM and high speed SLM. It was found, that in order to observe powder behaviour, a narrow bandwidth illumination source is necessary. The low speed SLM process was imaged clearly and revealed three stages of the process, i.e. powder redistribution, melting and drop incorporation. In contrast, the high speed process included vertical powder displacement. Influence of various process parameters is also discussed. 

Place, publisher, year, edition, pages
2016. , 47 p.
National Category
Manufacturing, Surface and Joining Technology
Identifiers
URN: urn:nbn:se:ltu:diva-59857OAI: oai:DiVA.org:ltu-59857DiVA: diva2:1039003
Educational program
Materials Engineering, master's level
Presentation
(English)
Supervisors
Available from: 2016-10-28 Created: 2016-10-20 Last updated: 2016-10-28Bibliographically approved

Open Access in DiVA

fulltext(87764 kB)36 downloads
File information
File name FULLTEXT02.pdfFile size 87764 kBChecksum SHA-512
0d1eef83904ebd79a559213a3aed90793431ba75c9a3b88fb81678687caf9223f789b50ff03604c11073ef3b3516382375a7cad96f3e793dbf83cb9b88f7ebd7
Type fulltextMimetype application/pdf

By organisation
Department of Engineering Sciences and Mathematics
Manufacturing, Surface and Joining Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 36 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 242 hits
ReferencesLink to record
Permanent link

Direct link