Accession Number : AD0696154

Title :   DISLOCATION DAMAGE IN TANTALUM AFTER CYCLIC LOADING,

Corporate Author : TECHNION - ISRAEL INST OF TECH HAIFA DEPT OF MATERIALS ENGINEERING

Personal Author(s) : Komem,Yigal ; Brandon,David G.

Report Date : AUG 1969

Pagination or Media Count : 28

Abstract : The dislocation distribution in tantalum foil after fatigue testing in the region of the yield point has been determined quantitatively using thin film electron microscopy. Changes in the measured micro-structural parameters as a function of stress level, test temperature and number of loading cycles have been related to a microscopic model of the fatigue process. The model leads to a consistent criterion for fatigue failure based on the gradual growth of impenetrable subboundary groups of immobile dislocations. (Author)

Descriptors :   (*TANTALUM, *FATIGUE(MECHANICS)), FOILS(MATERIALS), DISLOCATIONS, ELECTRON MICROSCOPY, GRAIN STRUCTURES(METALLURGY), ISRAEL

Subject Categories : Metallurgy and Metallography
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE