Accession Number : AD0660135

Title :   DISPERSED PARTICLE BEHAVIOR IN TD-NICKEL ALLOY.

Descriptive Note : Progress rept.,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK MATERIALS SCIENCE LAB

Personal Author(s) : Inman,M. C.

Report Date : JUN 1967

Pagination or Media Count : 14

Abstract : The progress report describes substructural studies of nickel strengthened with two volume percent thorium oxide (TD-Nickel). Attention is directed to the value of electron transmission techniques for quantitative study of particle size, size distributions and volume fraction. Electron microscope dark field studies show that individual dispersed particles are single crystals. It is found that agglomeration increases with successive cycles of cold work, recovery and recrystallization, and the dispersion also begins to coarsen after long anneal periods at 1400C. Both these processes can lead to degradation of the mechanical properties. (Author)

Descriptors :   (*NICKEL, *DISPERSION HARDENING), ELECTRON MICROSCOPY, SINGLE CRYSTALS, THORIUM COMPOUNDS, OXIDES, PARTICLES, SCATTERING, MEASUREMENT, RELIABILITY

Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE