Deformation kinetics of commercial Ti-50A (0. 5 At. Pct Oeq) at low temperatures (T < 0. 3T /SUB m/ )
Journal Article
·
· Metall. Trans., A; (United States)
The effects of strain rate and temperature on flow stress of wire of 2 and 22 ..mu..m grain size were investigated over the range of 4.2 to 700 K. Employing the thermally activated plastic flow concept, it concluded that the rate-controlling mechanism at low temperatures (T < 600 K) is thermally activated overcoming of interstitial solute atom obstacles (mainly oxygen) by dislocations moving on first-order prism planes. The Gibbs free energy of activation for the process is about 1.5 ev (about 0.2 ..mu..b/sup 3/), the maximum force of interaction about 8 X 10/sup -5/ dynes (about 0.2 ..mu..b/sup 2/), and the activation distance at which the force first rises rapidly about lb. The derivel parameters are in reasonable accord with the Fleischer-Friedel model. Qualitative accord is also obtained for the breaking of chemical bonds between interstitial solutes aod the surrounding titanium atoms by dislocations.
- Research Organization:
- General Electric Corp., Erie, PA
- OSTI ID:
- 6551901
- Journal Information:
- Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 14A:12; ISSN MTTAB
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mechanism of low-temperature radiation hardening in alkali halides. II. Thermal-activation mechanism of the interaction between dislocations and halogen interstitials in KBr
On evaluating the flow stress in niobium of commercial purity
Bow-outs in dislocation pile-ups and cracks
Journal Article
·
Tue Oct 31 23:00:00 EST 1978
· J. Appl. Phys.; (United States)
·
OSTI ID:6668515
On evaluating the flow stress in niobium of commercial purity
Journal Article
·
Mon May 01 00:00:00 EDT 1995
· Acta Metallurgica et Materialia
·
OSTI ID:55328
Bow-outs in dislocation pile-ups and cracks
Journal Article
·
Sat Dec 31 23:00:00 EST 1988
· Scr. Metall.; (United States)
·
OSTI ID:6195272
Related Subjects
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHEMICAL REACTION KINETICS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DEFORMATION
DIFFUSION
DISLOCATIONS
ENERGY
FLOW STRESS
FREE ENTHALPY
HIGH TEMPERATURE
INTERSTITIALS
KINETICS
LINE DEFECTS
LOW TEMPERATURE
MEDIUM TEMPERATURE
PHYSICAL PROPERTIES
POINT DEFECTS
REACTION KINETICS
STRAIN RATE
STRESSES
TEMPERATURE EFFECTS
THERMAL DIFFUSION
THERMODYNAMIC PROPERTIES
TITANIUM ALLOYS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHEMICAL REACTION KINETICS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DEFORMATION
DIFFUSION
DISLOCATIONS
ENERGY
FLOW STRESS
FREE ENTHALPY
HIGH TEMPERATURE
INTERSTITIALS
KINETICS
LINE DEFECTS
LOW TEMPERATURE
MEDIUM TEMPERATURE
PHYSICAL PROPERTIES
POINT DEFECTS
REACTION KINETICS
STRAIN RATE
STRESSES
TEMPERATURE EFFECTS
THERMAL DIFFUSION
THERMODYNAMIC PROPERTIES
TITANIUM ALLOYS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE