Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


cwru-cse-thesis_morrison.pdf (5.69 MB)

ETD Abstract Container

Abstract Header

Understanding the Interaction between Grain Boundaries and Precipitates in Ni-Al Using Molecular Dynamics

Morrison, Rachel Louise
http://rave.ohiolink.edu/etdc/view?acc_num=case1531238038709938

Abstract Details

2018, Master of Sciences, Case Western Reserve University, Materials Science and Engineering.
This thesis investigates the interaction between gamma' precipitates and grain boundaries in a Ni-Al system during deformation. This interaction is investigated using molecular dynamics, and gamma'/boundary configurations were built to investigate how the orientation, size, and interaction of gamma' change the deformation behavior of the grain boundary. The gamma' aided in nucleating defects (i.e., dislocations) that contributed to the boundary sliding mechanism. By increasing the size of precipitates that bisect the boundary, the boundary becomes stronger, whereas increasing the size of precipitates adjacent to the boundary makes the boundary weaker. Additionally, the interaction of multiple gamma' plays a role in grain boundary sliding behavior. Low concentrations of gamma' produce sliding dominated by atomic shuffling, whereas high concentrations of gamma' produce sliding dominated by dislocation emission. More work is needed to investigate the effects of temperature, initial defects, and different grain boundary configurations on sliding behavior.
Jennifer Carter (Committee Chair)
John Lewandowski (Committee Member)
David Matthiesen (Committee Member)
92 p.
Materials Science
grain boundary sliding; nickel superalloys; molecular dynamics

Recommended Citations

Citations

  • Morrison, R. L. (2018). Understanding the Interaction between Grain Boundaries and Precipitates in Ni-Al Using Molecular Dynamics [Master's thesis, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1531238038709938

    APA Style (7th edition)

  • Morrison, Rachel. Understanding the Interaction between Grain Boundaries and Precipitates in Ni-Al Using Molecular Dynamics. 2018. Case Western Reserve University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1531238038709938.

    MLA Style (8th edition)

  • Morrison, Rachel. "Understanding the Interaction between Grain Boundaries and Precipitates in Ni-Al Using Molecular Dynamics." Master's thesis, Case Western Reserve University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1531238038709938

    Chicago Manual of Style (17th edition)

case1531238038709938
1,169
© 2018, all rights reserved.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.