Dissertation
Numerical and Experimental Investigation of Additively Manufactured Bimetallic Structures of Nickel-Titanium and Titanium Matrix Metal-Ceramic Composites
Washington State University
Doctor of Philosophy (PhD), Washington State University
2023
DOI:
https://doi.org/10.7273/000006385
Abstract
New demands for higher capability materials and structures, particularly in the medical and aerospace industry, seek recent activities in fundamental manufacturing and material development using metal additive manufacturing (AM). For this purpose, the current study aims to understand the compositional and structural properties of titanium (Ti)-based composite structures by adding ceramic-reinforcement as a filler or in the form of layer-based bimetallic structures. The first chapter is dedicated to recent manufacturing developments and techniques to provide new material and structural design using AM methods and discusses the pros and cons of various AM techniques and our subsequent decision to build MMCs and bimetallic structures. The second and third chapters aim to understand the role of ceramic particle reinforcement in Ti-based matrices and study their mechanical response. Compound wear (CW), bio-tribocorrosion, microstructural evolution, hardness, and X-ray diffraction (XRD) tests were performed and observed upon addition of less than 5wt%, MMCs showed a significant improvement in corrosion and wear properties. The fourth and fifth chapters explore the development of layered bimetallic structures that exhibit a unique combination of microstructures and properties. Pure nickel (Ni) and tantalum (Ta) were selected along with pure Ti to study the role of reactive phase formation at the interface and their unit cell crystal structure on their macro mechanical stability and strength. The subsequent chapter explores the thermo-mechanical model to understand the temperature profile and resulting residual stresses in the heat-affected zone (HAZ) and fusion zone (FZ). Overall, the outcome of this work is intended to help mechanical and material designers and engineers to drive better AM strategies and manufacture solid and stiff composite structures owned from natural materials and implement those ideas into various subject studies and applications such as biomedical, aerospace, and tech industries.
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Details
- Title
- Numerical and Experimental Investigation of Additively Manufactured Bimetallic Structures of Nickel-Titanium and Titanium Matrix Metal-Ceramic Composites
- Creators
- Ali Afrouzian
- Contributors
- Amit Bandyopadhyay, (Advisor)Susmita Bose (Committee Member)David Field (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- Voiland College of Engineering and Architecture
- Theses and Dissertations
- Doctor of Philosophy (PhD), Washington State University
- Publisher
- Washington State University
- Number of pages
- 218
- Identifiers
- 99901087516001842
- Language
- English
- Resource Type
- Dissertation