Accession Number : AD0636487

Title :   AN ELECTRON TRANSMISSION STUDY OF OXIDE PARTICLE STATISTICS IN TD-NICKEL ALLOY.

Descriptive Note : Final scientific rept., 1 May 65-30 Apr 66.

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF ENGINEERING MECHANICS

Personal Author(s) : Inman, Maurice C. ; Smith,Patrick J.

Report Date : JUN 1966

Pagination or Media Count : 41

Abstract : 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)

Descriptors :   (*NICKEL ALLOYS, *DISPERSION HARDENING), THORIUM COMPOUNDS, OXIDES, PARTICLE SIZE, ELECTRON MICROSCOPY, CRYSTAL SUBSTRUCTURE, HARDNESS, RECRYSTALLIZATION

Subject Categories : Metallurgy and Metallography
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE