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You searched for +publisher:"University of North Texas" +contributor:("Nag, SoumyA"). One record found.

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University of North Texas

1. Devaraj, Arun. Phase Separation and Second Phase Precipitation in Beta Titanium Alloys.

Degree: 2011, University of North Texas

The current understanding of the atomic scale phenomenon associated with the influence of beta phase instabilities on the evolution of microstructure in titanium alloys is limited due to their complex nature. Such beta phase instabilities include phase separation and precipitation of nano-scale omega and alpha phases in the beta matrix. The initial part of the present study focuses on omega precipitation within the beta matrix of model binary titanium molybdenum (Ti-Mo) alloys. Direct atomic scale observation of pre-transition omega-like embryos in quenched alloys, using aberration-corrected high resolution scanning transmission electron microscopy and atom probe tomography (APT) was compared and contrasted with the results of first principles computations performed using the Vienna ab initio simulation package (VASP) to present a novel mechanism of these special class of phase transformation. Thereafter the beta phase separation and subsequent alpha phase nucleation in a Ti-Mo-Al ternary alloy was investigated by coupling in-situ high energy synchrotron x-ray diffraction with ex-situ characterization studies performed using aberration corrected transmission electron microscopy and APT to develop a deeper understanding of the mechanism of transformation. Subsequently the formation of the omega phase in the presence of simultaneous development of compositional phase separation within the beta matrix phase of a Ti-10V-6Cu (wt%) alloy during continuous cooling has been investigated using a combination of transmission electron microscopy and atom probe tomography. The results of these investigations provided novel insights into the mechanisms of solid-state transformations in metallic systems by capturing the earliest stages of nucleation at atomic to near atomic spatial and compositional resolution. Advisors/Committee Members: Banerjee, Rajarshi, Srivilliputhur, Srinivasan, Needleman, Alan, Nag, SoumyA, Fraser, Hamish.

Subjects/Keywords: Titanium alloys; phase transformation; phase separation

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APA (6th Edition):

Devaraj, A. (2011). Phase Separation and Second Phase Precipitation in Beta Titanium Alloys. (Thesis). University of North Texas. Retrieved from https://digital.library.unt.edu/ark:/67531/metadc67975/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Devaraj, Arun. “Phase Separation and Second Phase Precipitation in Beta Titanium Alloys.” 2011. Thesis, University of North Texas. Accessed November 27, 2020. https://digital.library.unt.edu/ark:/67531/metadc67975/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Devaraj, Arun. “Phase Separation and Second Phase Precipitation in Beta Titanium Alloys.” 2011. Web. 27 Nov 2020.

Vancouver:

Devaraj A. Phase Separation and Second Phase Precipitation in Beta Titanium Alloys. [Internet] [Thesis]. University of North Texas; 2011. [cited 2020 Nov 27]. Available from: https://digital.library.unt.edu/ark:/67531/metadc67975/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Devaraj A. Phase Separation and Second Phase Precipitation in Beta Titanium Alloys. [Thesis]. University of North Texas; 2011. Available from: https://digital.library.unt.edu/ark:/67531/metadc67975/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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