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Laser interaction on Haynes 282 with different process parameters
University West, Department of Engineering Science.
2022 (Swedish)Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
Abstract [en]

The purpose of this thesis is to map the laser interactions on the nickel-based superalloy Haynes 282 with different process parameters. The process parameters are power (w), scan speed (mm/s), focus (mm) and hatch distance (µm). The parameters are generally used in additive manufacturing (AM) in a method called laser powder bed fusion (LPBF). In this project no powder was used. Instead, a wrought plate of Haynes 282 was used with engraved lines and squares of different variations of process parameters. The interactions on the plate were analyzed through melt pool dimensions. The reason squares and lines are used is because, with lines both maximum depth and maximum width is attainable. And the squares, which consists of many lines, can measure the overlap of the melt pools. The squares consist of 12 samples with the same number of parameters, meaning each sample had one set of process parameters. The lines had 2 or 3 process parameters on each sample which added up to 11 samples. To be able to measure the effects of the parameters on the melt pools, a preparing phase was established. Where cutting, mounting, grinding and polishing along with etching was required before measurements. The samples were cut into half so observation on the internal part could be conducted to minimize any laser errors that may occur on the edges. The data obtained from the measurements can be used in manufacturing of Haynes 282 and further research. The results of the melt pool dimensions showed a deviation when comparing the results with the mathematical prediction. The melt pool depth of the lines provided different depths than predicted by the volumetric energy density equation. Reaching the conclusion that negative and positive defocusing of the beam does not provide the same amount of energy. This was concluded after measurements were done of the samples. Another deviation that was concluded was that some lines and squares that shared identical process parameters showed substantial difference in melt pool depths.

Place, publisher, year, edition, pages
2022. , p. 23
Keywords [en]
Laser interaction, processes
National Category
Manufacturing, Surface and Joining Technology
Identifiers
URN: urn:nbn:se:hv:diva-18565Local ID: EXM508OAI: oai:DiVA.org:hv-18565DiVA, id: diva2:1672699
Subject / course
Mechanical engineering
Educational program
Maskiningenjör
Supervisors
Examiners
Available from: 2022-06-22 Created: 2022-06-20 Last updated: 2022-06-22Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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