Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

You searched for id:"handle:10012/15412". One record found.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


University of Waterloo

1. Brock, Lisa. Laser Powder Bed Fusion of AlSi10Mg for Fabrication of Fluid Power Components.

Degree: 2020, University of Waterloo

Laser powder bed fusion (LPBF) is an additive manufacturing (AM) process that produces 3D objects in a layer-by-layer fashion by using a laser to selectively melt powdered material. Some of the advantages of LPBF include the potential for more design freedom, reduced waste, and flexible production strategies. It is possible to produce parts with complex geometries that cannot be created through traditional methods without great expense in terms of time, money, and resources. There is no need for expensive tooling, thus enabling fast production of unique designs. To implement LPBF in industry, adopters must develop personalized plans for product qualification, quality assurance, manufacturing, and post-processing requirements. The manufacturing strategy is particularly important, as the machine, material, and process parameters that are used have a large impact on the resulting microstructure and mechanical properties, ultimately controlling the quality of the end-product. The generation, control, and transmission of fluid power is critical for many engineering applications, such as the automotive transmission pump. Energy losses within the pump reduce the transmission’s ability to convert torque from the engine, so a more efficient, lightweight pump would reduce the fuel consumption of the vehicle. If LPBF is found suitable for the manufacture of aluminum fluid power components, design improvements could be implemented, and custom solutions could be offered to individual customers. This thesis aims to add to the body of knowledge for process development in LPBF of AlSi10Mg in order to improve the resulting part density, surface roughness, and material performance for fluid power applications. The material performance is evaluated through a comparison with an existing product: the cast aluminum pump housing for use in automotive transmissions. Process parameters were selected for the LPBF of AlSi10Mg on a modulated laser system to minimize porosity and surface roughness, and maximize production efficiency. This was accomplished through the use of initial process mapping, prediction of melt pool dimensions using a thermophysical model, and fine-tune adjustment of parameters. AlSi10Mg powder from two suppliers was characterized for morphology and particle size distribution. The density or solid fraction of manufactured artifacts was evaluated by optical microscopy and x-ray computed tomography (CT), and the surface roughness by laser confocal microscopy. Two process parameter sets were identified for manufacturing fluid power components. A relative density of 99.95% and surface roughness (Sa) of 11.39 μm were achieved. These process parameters were used to manufacture LPBF artifacts of various geometries for characterization of the relative density, surface roughness, and durability in terms of hardness, wear resistance, and corrosion resistance. The results were compared with benchmark values for a cast aluminum pump housing, which was also characterized for chemical composition and microstructure. The AM…

Subjects/Keywords: additive manufacturing; laser powder bed fusion; AlSi10Mg; fluid power; selective laser melting

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Brock, L. (2020). Laser Powder Bed Fusion of AlSi10Mg for Fabrication of Fluid Power Components. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/15412

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Brock, Lisa. “Laser Powder Bed Fusion of AlSi10Mg for Fabrication of Fluid Power Components.” 2020. Thesis, University of Waterloo. Accessed January 25, 2020. http://hdl.handle.net/10012/15412.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Brock, Lisa. “Laser Powder Bed Fusion of AlSi10Mg for Fabrication of Fluid Power Components.” 2020. Web. 25 Jan 2020.

Vancouver:

Brock L. Laser Powder Bed Fusion of AlSi10Mg for Fabrication of Fluid Power Components. [Internet] [Thesis]. University of Waterloo; 2020. [cited 2020 Jan 25]. Available from: http://hdl.handle.net/10012/15412.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Brock L. Laser Powder Bed Fusion of AlSi10Mg for Fabrication of Fluid Power Components. [Thesis]. University of Waterloo; 2020. Available from: http://hdl.handle.net/10012/15412

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.