Accession Number : AD0750964

Title :   Special Features of the Failure of Alpha-Titanium Alloys at High Temperatures,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Ushkov,S. S. ; Moroz,L. S.

Report Date : 25 AUG 1972

Pagination or Media Count : 13

Abstract : The plasticity of Ti alpha-alloys in fine- and coarse-grained states was studied at high temperatures. The anomalous decrease in plasticity was observed from 500 degrees to the transformation temperature. The failure of Ti alloys at high temperatures has an intergranular character. The failure mechanism at high temperatures consists in accumulation of pores, which causes microfractures. The pores are formed on the grain boundaries at any type of stresses in the samples where compressive stresses are absent. Small pores can be healed by annealing. The formation of pores at grain boundaries occurs both during prolonged application of stress and during deformation at rates approaching static loading. (Author)

Descriptors :   (*TITANIUM ALLOYS, FAILURE(MECHANICS)), MICROSTRUCTURE, PLASTIC PROPERTIES, GRAIN BOUNDARIES, USSR

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE