2 options
Diffusional aggregation in binary solids.
- Format:
- Book
- Thesis/Dissertation
- Author/Creator:
- Shiqi, Wei, 1022-1104.
- Language:
- English
- Subjects (All):
- Mechanical engineering.
- Engineering, Mechanical.
- 0548.
- Penn dissertations--Mechanical engineering and applied mechanics.
- Mechanical engineering and applied mechanics--Penn dissertations.
- Local Subjects:
- Engineering, Mechanical.
- Penn dissertations--Mechanical engineering and applied mechanics.
- Mechanical engineering and applied mechanics--Penn dissertations.
- 0548.
- Physical Description:
- 265 pages
- Contained In:
- Dissertation Abstracts International 74-06B(E).
- System Details:
- Mode of access: World Wide Web.
- text file
- Summary:
- A solid solution can spontaneously separate into phases, e.g. spinodal decomposition, and evolve into patterned microstructures. This non-equilibrium thermodynamic process is significantly affected by material anisotropy, including non-dilational transformation strain, heterogeneous elastic properties, and orientation-dependent interfacial energy, as well as by external fields that can be used to direct aggregation. A phase field model is developed that couples mass diffusion and mechanical fields, which incorporates chemical, interfacial, and elastic energies, and couples naturally with externally-imposed mechanical fields. Two- and three-dimensional simulations are carried out to investigate aggregation under uniform load and in thin films under patterned loads. The morphological evolution of precipitates is shown to depend strongly on both anisotropy and external loading. Major features of the simulations are predicted theoretically from energy considerations utilizing the concept of Eshelby-type equivalent eigenstrains.
- Notes:
- Thesis (Ph.D. in Mechanical Engineering and Applied Mechanics) -- University of Pennsylvania, 2012.
- Source: Dissertation Abstracts International, Volume: 74-06(E), Section: B.
- Adviser: John L. Bassani.
- Local Notes:
- School code: 0175.
- ISBN:
- 9781267898548
- Access Restriction:
- Restricted for use by site license.
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