Development of advanced high-temperature materials with emphasis on understanding the relationship between processing, microstructure and mechanical properties; the analysis of microstructures using analytical electron microscopy (AEM) focusing on understanding the crystallography of phases and the solid-state phase transformations; and the mechanical alloying processing.
- Ph.D. in Materials Science and Engineering, University of Florida, Gainesville, December, 1996.
Dissertation - "Phase Transformations in the Central Portion of the Nb-Ti-Al Ternary System."
- M.S. in Materials Science and Engineering, University of Florida, Gainesville, December, 1991.
Thesis - "The Effect of Copper and Nickel on the Neutron Irradiation Damage in Iron Alloys."
- B.S. in Materials Science and Engineering, University of Florida, Gainesville, August, 1985.
- Senior Research - Investigated the ductile crack initiation process for an A-543 pressure vessel steel by correlating the stretch zone width with the crack tip opening displacement of the crack.
Research Staff Member in the Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN. May 2000 to present. Focus of current and past research project:
Membership In Professional Associations:
- Principle investigator of several projects that led to successful development of the advanced oxide dispersion strengthened 14YWT ferritic alloy that contains a high concentration of nano-size Ti-, Y- and O-enriched clusters, or nanostructures. The focus of current projects includes: investigating the creep and fracture toughness properties of 14YWT; understanding the deformation mechanisms of 14YWT, especially those occurring during creep at high temperatures; examining alternative processing technologies that will enable the scale-up production of 14YWT to facilitate future fabrication and joining studies; and investigating the stability of the microstructure and mechanical properties of 14YWT during energetic ion and neutron irradiations to high doses and temperatures.
- Investigated the relationship between microstructural texture and recrystallization behavior of Nb-1Zr and showed that texture could influence the creep behavior of this alloy.
- Investigated the solute interactions between Ti and interstitial O, C and N impurities by studying the dynamic strain aging deformation behavior of V-4Cr-4Ti and vanadium.
- Investigated the precipitation behavior and developed a heat treatment procedure that redistributed the O, C and N interstitial atoms from inhomogeneously distributed coarse TiCON precipitates to homogeneous nano-plate shaped TiCON precipitates that improved the low temperature fracture toughness and high temperature creep strength of V-4Cr-4Ti.
- Post-Doctoral Research Fellowship in the Metals & Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN. September 1998 to May 2000. Conducted research on various projects based on structure/property/processing relationships relevant to the Fusion Energy Program.
- TEM Technical Specialist and Adjunct Instructor at the New York State College of Ceramics at Alfred University (NYSCC), Alfred, NY. August 1992 to August 1998.
- Instructor of graduate level TEM course which included lecture and laboratory sessions covering microscope components and operation, electron diffraction, amplitude and phase contrast image formation, image/diffraction interpretation, and specimen preparation for materials science applications.
- Worked with faculty, students, and industrial clients in the area of analytical TEM characterization. Responsible for generating and interpreting data from imaging, diffraction, and x-ray energy dispersive spectroscopy (XEDS) techniques appropriate to the needs of specific projects. Also, instructed and performed suitable specimen preparation methodologies.
- Manager of the TEM facility: JEOL 2000FX Analytical/Scanning Transmission Electron Microscope, PGT XEDS analyzer, Gatan DuoMill Ion-Mill, Edwards carbon evaporator, other specimen preparation equipment, and photographic darkroom facilities.
- Graduate Research Assistant - Department of Materials Science and Engineering, University of Florida, Gainesville, FL. September 1985 to August 1987 and May 1988 to December 1991. TEM Microscopist (part-time) - Major Analytical Instrumentation Center (MAIC), University of Florida, Gainesville, FL. August 1987 and May 1988.
- Materials Research Society (MRS)
- Microscopy Society of America (MSA)
- ASM International
- Executive Committee Member; Oak Ridge Chapter, 1999 to present.
- Executive Committee Member; S.W. New York Chapter, 1996-1998.
- Sigma Xi
- Air Force Association (AFA)