Thesis Committee

Ian Baker, Ph.D. (Chair)

Harold J. Frost, Ph.D.

Erland M. Schulson, Ph.D.

Paul R. Munroe, Ph.D.

Abstract

The objective of this proposal is to study the alloying effects of Ti and the interstitial effects of C on the microstructure and mechanical properties of a B2/f.c.c. two-phase alloy system Fe₃₆Ni₁₈Mn₃₃Al₁₃ and a single f.c.c. phase alloy system Fe₄₃Ni₁₂Mn₃₇Al₈, respectively. The proposal outlines:

1. Microstructural characterization of alloys doped with Ti and C at both as-cast and heat treatments states. State-of-the-art techniques involving a scanning electron microscope (SEM), a transmission electron microscope (TEM), an atom probe tomograph (APT), Electron Probe Micro-Analysis (EPMA) and synchrotron x-ray diffraction (XRD) will be used.
2. Tensile testing alloys at different temperatures and strain rates to investigate the substitutional strengthening effects of Ti and the interstitial strengthening effects of C.
3. Determining the deformation mechanism of alloys based on the SEM and TEM studies.
4. Modeling the strength and ductility of alloys relating to their microstructures.