Identifier
etd-01242006-113255
Degree
Master of Science in Mechanical Engineering (MSME)
Department
Mechanical Engineering
Document Type
Thesis
Abstract
We present a new methodology for measuring the grain boundary mobility for curved boundaries using molecular-dynamics simulation of grain growth in a small, specifically tailored Pd nanocrystalline structure. In the model system, the boundaries move under the forces provided by their curvature and in the presence of the triple junctions. As a consequence of grain boundary migration the boundary area per unit volume is reduced and the mean grain size of grains increases with time. Our investigation shows that at elevated temperatures the activation energy for grain growth in this specifically tailored microstructure is very close to that of grain boundary diffusion. These findings suggest that the migration mechanism of curved grain boundaries might be mediated by short distance diffusion of atoms in the grain boundaries.
Date
2006
Document Availability at the Time of Submission
Release the entire work immediately for access worldwide.
Recommended Citation
Wang, Shengyu, "Molecular dynamics simulation study of grain boundary migration in nanocrystalline Pd" (2006). LSU Master's Theses. 3687.
https://repository.lsu.edu/gradschool_theses/3687
Committee Chair
Dorel Moldovan
DOI
10.31390/gradschool_theses.3687