Date of Award

Winter 2022

Project Type

Dissertation

Program or Major

Materials Science

Degree Name

Doctor of Philosophy

First Advisor

Marko Knezevic

Abstract

In this thesis, contributions to characterization of plasticity, fracture, and phase transformation in metals with hexagonal close-packed structure are presented. First, the structure-properties correlations are established for Mg-1.3Zn-0.4Ca-0.4Mn and Mg-1.5Nd alloys. Next, the role of microstructural features such as gran/twin boundaries in the development of damage and fracture in magnesium is discussed. Then, a structure metric for quantitative assessment of fracture is developed and validated on magnesium and titanium alloys. Experimental studies on plasticity are followed by crystal plasticity modelling of Taylor impact test on zirconium to correlate experimental and predicted evolution of microstructure and shape change. Finally, a phase transformation in magnesium at high pressure is characterized using the state-of-the-art synchrotron radiation experiments.

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