Thesis
Understanding the effects of oxide-based ceramic addition into T16AL4V and aluminum-12silicon alloys via laser-based additive manufacturing
Washington State University
Master of Science (MS), Washington State University
2018
Handle:
https://hdl.handle.net/2376/101698
Abstract
Metal additive manufacturing (AM) is becoming a widely utilized tool in industrial and academic settings for its unique ability to create structures with incredible complexity and improved mechanical properties. Single material metallic components produced through AM have taken advantage of these improvements and are currently implemented into real-life applications in the medical, automotive, and aerospace industry. While single material AM has its place for replacing conventionally processed structures, soon multi-material structures produced through AM will be replacing these single material parts. Composite structures are able to combine favorable properties of each constituent phase, thus creating a component with a favorable performance compared to each of the constituents on their own. Composites produced via laser-based AM recently have been heavily investigated to create functionally graded materials that implement site-specific functionality in a single manufacturing step. Large increases in the parent material for hardness, wear resistance, biocompatibility, compressive strength, thermal properties, and more have been realized utilizing this idea. However, processing multiple materials simultaneously is not trivial and a large understanding is required to successfully create multi-material components via laser-based processing. This thesis is split into two studies which focus on the processability of oxide-based ceramic reinforced metallic structures via Laser Engineered Net Shaping and their resulting property enhancements. The first study investigates the addition of aluminum oxide and silicon oxide particles into Ti6Al4V titanium alloy. High hardness and wear resistance was found in the ceramic reinforced condition compared to the unreinforced structure and was increased further compared to conventionally processed Ti6Al4V. The second study investigates the processability of eutectic aluminum alloy Al-12Si and the functional gradation of Al-12Si with the addition of aluminum oxide. Results indicated a highly ductile Al-12Si structure and a functionally graded material with tailorable thermal properties across the structure was observed. This thesis is intended to highlight the possibilities of multi-material AM and show that once a firm understanding of these components is grasped, highly functional parts can be created which push the envelope of current AM practices.
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Details
- Title
- Understanding the effects of oxide-based ceramic addition into T16AL4V and aluminum-12silicon alloys via laser-based additive manufacturing
- Creators
- Bryan Thomas Heer
- Contributors
- Amit Bandyopadhyay (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Mechanical and Materials Engineering, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525279101842
- Language
- English
- Resource Type
- Thesis