Theses and Dissertations

Issuing Body

Mississippi State University


Schneider, Judith A.

Committee Member

Shamsaei, Nima

Committee Member

Lippold, John

Date of Degree


Document Type

Graduate Thesis - Open Access

Degree Name

Master of Science


The objective of this study is to evaluate material response to plastic deformation between aluminum alloys AA2219-T87 and AA2195-T87. Of particular interest are the deformation conditions that result in subsequent grain refinement or recrystallization. Although both alloys have a face centered cubic (FCC) microstructure, variations are expected in their plastic deformation behavior. During plastic deformation, dislocation motion results in faulted regions whose width can vary according to chemical composition of the alloy. These faulted regions, or stacking faults, influence whether dislocation entanglements form or annihilation occurs during the deformation process. In addition, differences in mechanical properties can affect the amount of adiabatic heating that occurs during deformation. Ultimately these differences can affect the uniformity of deformation and the stability of the microstructure.