Dislocation-enhanced induced Snoek peak associated with heavy interstitials in the presence of kinks moving harmonically in anisotropic body-centered-cubic metals

1985 ◽  
Vol 31 (8) ◽  
pp. 5044-5057 ◽  
Author(s):  
Tarik Ö. Ogurtani ◽  
Alfred K. Seeger
Keyword(s):  
Anisotropic Body ◽  
Body Centered Cubic ◽  
Snoek Peak ◽  
Cubic Metals

Mechanical Damping of the Snoek Peak in Tantalum – Oxygen System

2008 ◽  
Vol 273-276 ◽  
pp. 239-244
Author(s):  
Odila Florêncio ◽  
Paulo Sergio Silva ◽  
Geovani F. Barbosa ◽  
Fábio X. Melo ◽  
Carlos Roberto Grandini ◽  
...  
Keyword(s):  
Experimental Sample ◽  
Torsion Pendulum ◽  
Body Centered Cubic ◽  
Relaxation Strength ◽  
Internal Friction Peak ◽  
Snoek Peak ◽  
Cubic Metals ◽  
Oxygen System ◽  
Relaxation Measurements ◽  
Oscillation Frequencies

Interstitial solutes in body-centered cubic metals, such as oxygen in tantalum, produce ideally Snoek effects when they are in solutions enough diluted. However, for higher concentration of these solutes, more complex relaxation process can occur, as interaction between interstitial solutes and dislocations. Anelastic relaxation measurements were carried out in polycrystalline tantalum samples, using torsion pendulum inverted, operating between 300 K and 680 K and oscillation frequencies in the hertz bandwidth, for three different experimental sample conditions: as received sample, annealed and annealed followed by a treatment in an oxygen atmosphere. These measurements have revealed the following behavior: the intensity of the internal friction peak associated to matrix-interstitial interaction Ta-O decreased between the first run and the next runs, and this phenomenon did not occur for the others conditions. The variation of relaxation strength of Ta-O peak, with number of runs is due to a decrease of an amount of oxygen in solid solution, which can be associated with the precipitation of new phases in Ta sample and with the trapping of oxygen atoms by dislocations.

Voids in Irradiated Tungsten and Molybdenum

1969 ◽  
Vol 27 ◽  
pp. 190-191
Author(s):  
Robert C. Rau ◽  
Robert L. Ladd
Keyword(s):  
Melting Point ◽  
Fast Neutron ◽  
Neutron Irradiation ◽  
Elevated Temperatures ◽  
Irradiation Temperature ◽  
The Body ◽  
Face Centered Cubic ◽  
Body Centered Cubic ◽  
Cubic Metals ◽  
Face Centered

Recent studies have shown the presence of voids in several face-centered cubic metals after neutron irradiation at elevated temperatures. These voids were found when the irradiation temperature was above 0.3 Tm where Tm is the absolute melting point, and were ascribed to the agglomeration of lattice vacancies resulting from fast neutron generated displacement cascades. The present paper reports the existence of similar voids in the body-centered cubic metals tungsten and molybdenum.

Effective interatomic potential for body‐centered‐cubic metals

1995 ◽  
Vol 78 (1) ◽  
pp. 122-126 ◽  
Author(s):  
Y. R. Wang ◽  
D. B. Boercker
Keyword(s):  
Interatomic Potential ◽  
Body Centered Cubic ◽  
Cubic Metals

scholarly journals Slip transmission of high angle grain boundaries in body-centered cubic metals: Micropillar compression of pure Ta single and bi-crystals

2018 ◽  
Vol 156 ◽  
pp. 356-368 ◽  
Author(s):  
Jordan S. Weaver ◽  
Nan Li ◽  
Nathan A. Mara ◽  
David R. Jones ◽  
Hansohl Cho ◽  
...  
Keyword(s):  
Grain Boundaries ◽  
Body Centered Cubic ◽  
High Angle ◽  
Cubic Metals ◽  
Micropillar Compression ◽  
Slip Transmission
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