Influence of low-temperature thermocycling on anisotropy of the structural state of commercial purity Beryllium

1984 ◽  
Vol 19 (11) ◽  
pp. 1477-1482
Author(s):  
B. I. Verkin ◽  
F. F. Lavrentev ◽  
I. S. Braude ◽  
O. P. Salita
Keyword(s):  
Low Temperature ◽  
Structural State ◽  
Commercial Purity

Low Temperature Mechanical Properties of Different Commercial Purity Nanostructured Titanium Processed by ECA Pressing

2006 ◽  
Vol 503-504 ◽  
pp. 633-638 ◽  
Author(s):  
Elena D. Tabachnikova ◽  
Vladimir Z. Bengus ◽  
Aleksey V. Podolskiy ◽  
S.N. Smirnov ◽  
Dmitriy Gunderov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Structural State ◽  
Mechanical Characteristics ◽  
Coarse Grained ◽  
Commercial Purity ◽  
Nanostructured Titanium ◽  
Fine Grained ◽  
Angular Pressing ◽  
Tension And Compression

Low temperature mechanical characteristics under quasistatic uniaxial tension and compression have been studied of ultra fine-grained structural state of polycrystalline titanium – nanostructured titanium, processed by the equal channel angular pressing (ECAP). Values of the yield stress and the uniform plasticity at 300, 77, and 4.2 K for nanostructured (NS) and polycrystalline coarse-grained (CG) titanium of different commercial purity have been compared.

The effect of composition and structural state on the rhombic section and pericline twins of plagioclase felspars

1958 ◽  
Vol 31 (242) ◽  
pp. 914-928 ◽  
Author(s):  
J. V. Smith
Keyword(s):  
Low Temperature ◽  
Structural State ◽  
Cell Dimensions

SummaryThe position of the rhombic section of plagioclase felspars, as calculated from the measured cell dimensions, has been shown to vary with the structural state, the variation from high- to low-temperature forms being most pronounced for albite. The theoretical composition plane of pericline twins is the rhombic section. If the structural state or the composition of the felspar changes after twinning has occurred, the cell dimensions and hence the rhombic section will change; however, the composition plane of the pericline twin will probably remain unchanged unless recrystallization occurs, or perhaps if the felspar is subjected to strong stress. Thus the observed pericline composition plane need not coincide with the rhombic section. Comparison of observed composition planes with the corresponding calculated rhombie sections shows that some of them do indeed differ and the differences have been used to provide information on the changes occurring subsequent to the establishment of the pericline twins. The interpretation is complicated by the occurrence of the acline-A twin, whose composition plane is {001}, for the rhombie section of plagioclase felspars from An0 to An60 may coincide with {001} if the structural state of inversion has a particular value. When the observed composition would agree with both pericline and acline-A twinning, the new term b-axis twin has been used.

The feldspars of the Rosses Granite Complex, Donegal, Ireland

1966 ◽  
Vol 35 (275) ◽  
pp. 975-982 ◽  
Author(s):  
A. Hall
Keyword(s):  
Low Temperature ◽  
Structural State ◽  
Alkali Feldspar ◽  
Temperature State ◽  
Granite Complex ◽  
Higher Temperature ◽  
Alkali Feldspars

SummaryAn examination has been made of the composition and structural state of the feldspars in each of the units of the Rosses granite complex. The compositions of the plagioclases are systematically related to the compositions of the rocks, but the alkali feldspars are much more uniform as a result of postmagmatic recrystallization. In the granites both alkali feldspar and plagioclase are in low-temperature structural states, but alkali feldspar phenocrysts from one of the porphyry dykes associated with the complex show a higher-temperature state.

Influence of the grain size and structural state of grain boundaries on the parameter of low-temperature and high-rate superplasticity of nanocrystalline and microcrystalline alloys

2010 ◽  
Vol 52 (5) ◽  
pp. 1098-1106 ◽  
Author(s):  
V. N. Chuvil’deev ◽  
A. V. Shchavleva ◽  
A. V. Nokhrin ◽  
O. É. Pirozhnikova ◽  
M. Yu. Gryaznov ◽  
...  
Keyword(s):  
Grain Size ◽  
Low Temperature ◽  
Grain Boundaries ◽  
Structural State ◽  
High Rate

Nanocrystalline grain structures developed in commercial purity Cu by low-temperature cold rolling

2002 ◽  
Vol 17 (12) ◽  
pp. 3004-3007 ◽  
Author(s):  
Y. M. Wang ◽  
M. W. Chen ◽  
H. W. Sheng ◽  
E. Ma
Keyword(s):  
Plastic Deformation ◽  
Low Temperature ◽  
Cold Rolling ◽  
Grain Refinement ◽  
Pure Copper ◽  
Commercial Purity ◽  
Grain Structures

Nanocrystalline pure copper was obtained by cold rolling a commercial bulk Cu to very large extensions at subambient temperatures. The eventual formation of nanocrystalline grain structures is attributed to dynamic grain refinement (recrystallization) mechanisms activated by the low-temperature continuous plastic deformation that leads to ultrahigh densities of dislocations.

Effect of low-temperature (77 K) quasihydrostatic extrusion on the properties of high-purity titanium: The role of initial structural state

2013 ◽  
Vol 39 (11) ◽  
pp. 983-989 ◽  
Author(s):  
M. A. Tikhonovsky ◽  
P. A. Khaimovich ◽  
K. V. Kutniy ◽  
I. F. Kislyak ◽  
V. S. Okovit ◽  
...  
Keyword(s):  
Low Temperature ◽  
High Purity ◽  
Structural State ◽  
Purity Titanium
Sign in / Sign up

Export Citation Format

Share Document