Stress effects on atomistic kinetic transitions
Name
958163336-MIT.pdf
Description
Full printable version
Size
18.39 MB
Format
Adobe PDF
Checksum (MD5)
2d34fef0b926b7877c54f0e3d74ea192
Author(s)
Ball, Sabrina Lillian
Advisor(s)
Christopher Schuh and Ken Kamrin.
Date Issued
2016
Publisher
Massachusetts Institute of Technology
Abstract
In this thesis, I studied how the full tensorial stress state applied to a kinetic transition impacts the activation enthalpy. To this end, the activation energy, scalar activation volume, and tensorial activation volume were studied for several kinetic transition types. This computational study used the nudged elastic band method to find the activation state for initial and final configurations known a priori, primarily from the kinetic activation relaxation technique. The preliminary work was verified by a commonly studied and well understood vacancy generation and migration to an adjacent lattice cite in FCC copper and HCP titanium. The method was then applied to transitions of increasing complexity: point defect generation in a perfect copper crystal, and grain boundary transitions in the [Sigma] 5 [210] grain boundary in copper.
Description
Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2016.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 145-150).
Subjects
Mechanical Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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