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Use of High Intensity Milling and Equal Channel Angular Extrusion to Produce and Consolidate Nanostructured Titanium Silicide

[+] Author Affiliations
Xhemal Kaculi

Lamar University, Katy, TX

Malur N. Srinivasan

Lamar University, Beaumont, TX

K. Ted Hartwig

Texas A&M University, College Station, TX

Paper No. IMECE2003-42229, pp. 871-877; 7 pages
doi:10.1115/IMECE2003-42229
From:
  • ASME 2003 International Mechanical Engineering Congress and Exposition
  • Electronic and Photonic Packaging, Electrical Systems and Photonic Design, and Nanotechnology
  • Washington, DC, USA, November 15–21, 2003
  • Conference Sponsors: Electronic and Photonic Packaging Division
  • ISBN: 0-7918-3714-9 | eISBN: 0-7918-4663-6, 0-7918-4664-4, 0-7918-4665-2
  • Copyright © 2003 by ASME

abstract

The focus of this research is on (a) the use of mechanical alloying (MA) to produce nanostructured titanium silicide (Ti5 Si3 ) powder and (b) use of equal channel angular extrusion (ECAE) for powder consolidation to preserve the fine scale structure achieved via mechanical alloying. MA is a high-intensity ball milling process that can be used to produce nanocrystalline and amorphous powders. A 23 factorial design is applied to optimize the process and study the effect of MA parameters (milling time, milling speed, ball-to-powder ratio) on the grain size of powder. ECAE is a process that produces intense and uniform plastic deformation caused by simple shear of the material. A 4 × 2 factorial design was used to study the effect of ECAE parameters (number of extrusions, billet orientation, temperature) on the properties of the final product. The final product possesses a grain size of less than 20 nanometers.

Copyright © 2003 by ASME

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