Chris Booth-Morrison

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Chris Booth-Morrison
Research: Evolution of Precipitates in Ni-Based Superalloys
Education: B.Eng Metallurgical Engineering, McGill University
Publications: Publications by Booth-Morrison in our database

Contact

Chris Booth-Morrison
Materials Science and Engineering
2220 North Campus Drive
Evanston, IL 60208
Phone:
Email:
Fax: 847.467.2269

I am a third-year graduate student studying the temporal evolution of nickel-nased superalloys by atom-probe tomography (APT.

Ni-Al-Cr

We are interested in studying the kinetic pathways which lead to the decomposition of the g-matrix phase by the formation of nanomter-sized g'-precipitates. APT of the Ni-Al-Cr nanostructures provides an in-depth look at the compositional and nanostructural evolution of the g’-precipitate phase as it evolves. The decomposition of the g-matrix phase, from the early stages of solute-rich g’-nuclei formation, to the subsequent growth and coarsening of g’-precipitates, is accessed within the framework of classical nucleation, growth and coarsening theories. The effects of varying the solute concentrations on the temporal evolution of Ni-Al-Cr alloys can be determined in order to provide a more quantitative understanding of the kinetic pathways that lead to phase separation, and the achievement of the equilibrium compositions of both phases.

Ni-AL-Cr-Ta

The addition of Ta to the ternary Ni-Al-Cr system results in the formation of a larger volume fraction of g'-precipitates which demonstrate very strong solute partitioning. Ta has been shown to be a strong g'-precipitate former and solid-solution strenghtener and is known to improve high-temperature strength, creep, fatigue and corrosion properties, all of which are desirable for use in nickel-based superalloys in high-termperetaure aplications.