Accession Number : AD0774759

Title :   Asymmetrical Mechanical Behavior of a Precipitation Hardened Beta Titanium Alloy.

Descriptive Note : Technical rept.,

Corporate Author : MICHIGAN TECHNOLOGICAL UNIV HOUGHTON DEPT OF METALLURGICAL ENGINEERING

Personal Author(s) : Tuominen,Steven M. ; Koss,Donald A.

Report Date : JAN 1974

Pagination or Media Count : 20

Abstract : Precipitation hardened single crystals of a beta (bcc) Ti - 40 a/0 V + 1.0 a/o Si alloy were deformed in compression at 77K and 298K. The dependence of the yield stress upon aging time at 570C for solutionized and quenched crystals shows two maxima, caused by the formation of silicide precipitates. The orientation dependence of the yield stress and of the active macroscopic slip plane were determined as a function of aging time. The results indicate that the effect of the dislocation core structure on dislocation motion is independent of the presence of precipitates. The results also suggest that matrix hardening is independent of and additive to precipitation hardening. (Modified author abstract)

Descriptors :   *Titanium alloys, *Vanadium alloys, *Hardening, Silicon, Yield strength, Precipitation, Dislocations, Deformation, Silicides

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE