AN ELECTRON TRANSMISSION STUDY OF OXIDE PARTICLE STATISTICS IN TD-NICKEL ALLOY.
Final scientific rept., 1 May 65-30 Apr 66.
PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF ENGINEERING MECHANICS
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Electron microscope studies of the substructure of nickel strengthened by dispersed thorium oxide particles were made. Special attention was paid to the problem of the stability of a strenthening dispersion in terns of particle size distribution and agglomeration with respect to environmental temperatures ranging to the melting point 1450C of the nickel matrix. Electron microscope dark field techniques was also employed to investigate the crystal structure of individual particles in the above temperature range. Finally, the bulk strength in terms of microhardness as a function of time at various temperatures was interpreted in the light of the substructural observations. Author
- Metallurgy and Metallography