$alpha$-peak in vanadium

Conference · Sun Dec 31 23:00:00 EST 1972

OSTI ID:4403972

Chang, H. Y.; Wert, C. A.

From conference on internal friction and ultrasonic attenuation in crystalline solids; Aachen, F. R. Germany- (17 Aug 1973). It is believed that the alpha -peak is not a single, unique peak, probably varying with the presence of hydrogen, oxygen, and nitrogen. Two regions of deformation seem to exist for the alpha -peak obtained in the highest purity. Results show that the presence of immobile interstitials (oxygen and nitrogen) in solid solution suppresses the alpha -peak, apparently by locking the dislocations. Annealing of deformed specimens in the teinperature range 200 to 300 deg C permits large-scale diffusion of interstitial oxygen or nitrogen to the dislocations. The precipitation peak is explained by the formation of incoherent hydrides causing the generation of many dislocations in the atmosphere of hydrogen in thermodynamic equilibrium with the hydride at the peak temperature. The damping peak originating from these dislocations should be the Snoek-- Koester peak Type I. (21 references) (MCW)

• Research Organization: Illinois Univ., Urbana (USA)
• NSA Number: NSA-29-003046
• OSTI ID: 4403972
• Report Number(s): COO--1198-1014; CONF-730844--1
• Country of Publication: United States
• Language: English

Related Subjects

*VANADIUM-- DEFORMATION
ACTIVATION ENERGY
ANNEALING
DISLOCATIONS
HYDRIDES
IMPURITIES
INTERSTITIALS
N50230* --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties
Structure & Phase Studies
NITROGEN
OXYGEN
PEAKS
PRECIPITATION
THERMODYNAMICS