Anisotropy of Dia-Elastic Modulus Change in Aluminum Single Crystals After Electron Irradiation at 4.2°K

1975 ◽  
pp. 233-238
Author(s):  
K.-H. Robrock ◽  
W. Schilling
Keyword(s):  
Elastic Modulus ◽  
Single Crystals ◽  
Electron Irradiation

The Effect of Solid Solution Impurities on Dislocation Nucleation in a (001) Mo – 1.5 at.% Ir Single Crystal

2010 ◽  
Vol 662 ◽  
pp. 85-93
Author(s):  
Sergey Dub ◽  
Igor Zasimchuk ◽  
Leonid Matvienko
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Shear Stress ◽  
Elastic Modulus ◽  
Single Crystal ◽  
Single Crystals ◽  
Free Volume ◽  
Dislocation Nucleation ◽  
Initial Portion ◽  
G 12

Mechanical properties of (001) Mo and (001) Mo – 1.5 at.% Ir single crystals have been studied by nanoindentation. It has been found that the iridium addition to molybdenum leads to an increase in both hardness and elastic modulus. An abrupt elasto-plastic transition (pop-in) at a depth of about 20 - 40 nm caused by dislocation nucleation in previously dislocation-free volume has been observed in the initial portion of the loading curve. It has shown that the Ir addition essentially affects the dislocation nucleation. Mean shear stress required for the dislocation nucleation increased from 10.8 GPa (G/12) for a Mo single crystal to 18.2 GPa (G/8) for the Mo – 1.5 at% Ir solid solution. Thus, the Ir solution in a Mo single crystal affects not only the resistance to the motion of dislocations (hardness) but the nucleation of them as well. The latter is likely to occur as a result of an increase in the structure perfection of the Mo – 1.5 at% Ir solid solution as compared to the pure Mo single crystal.

Electron irradiation induced crystalline-to-amorphous transition in quartz single crystals

1990 ◽  
Vol 116 (1) ◽  
pp. 1-15 ◽  
Author(s):  
H. Inui ◽  
H. Mori ◽  
T. Sakata ◽  
H. Fujita
Keyword(s):  
Single Crystals ◽  
Electron Irradiation

scholarly journals Effects of Crystal Orientation and Grain Boundary Inclination on Stress Distribution in Bicrystal Interface of Austenite Stainless Steel 316L

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Fu-qiang Yang ◽  
He Xue ◽  
Ling-yan Zhao ◽  
Xiu-Rong Fang ◽  
Hai-bing Zhang
Keyword(s):  
Grain Size ◽  
Stainless Steel ◽  
Elastic Modulus ◽  
Grain Boundary ◽  
Single Crystals ◽  
Crystal Orientation ◽  
Stress And Strain ◽  
Face Centered Cubic ◽  
Stainless Steel 316L ◽  
Load Direction

Nuclear structural material austenitic stainless steel 316L is a polycrystalline composed of single crystals with a face-centered cubic (FCC) structure, and the intergranular stress corrosion cracking (IGSCC) is closely related to the crystal orientation. A constitutive model is presented to assess the elastic response of anisotropic behavior of single crystals in 316L in this study. With a bicrystal model built by the finite element method, the effects of crystal orientation and grain boundary (GB) inclination on the stress state nearby a symmetric tilt GB were discussed under the constant-displacement condition. The results indicate that when tensile axes are perpendicular to the GB, the stress and strain are equal at the GB and inside the grain, and the crystal misorientation has little effects on the stress and strain distribution. If the GB is not perpendicular to the load direction, the GB inclination angle will change the equivalent elastic modulus along the load direction and result in a larger stress in the grain with larger equivalent elastic modulus, but the stress tends to be equal inside the two grains. The grain size effects verification shows that the conclusions are independent of grain size.

Effect of high-energy electron irradiation on spectroscopic properties of forsterite single crystals

2006 ◽  
Author(s):  
V. F. Lebedev ◽  
S. Yu. Tenyakov ◽  
E. A. Vanina ◽  
I. V. Gopienko ◽  
S. V. Simakov ◽  
...  
Keyword(s):  
Single Crystals ◽  
Electron Irradiation ◽  
Spectroscopic Properties ◽  
High Energy ◽  
Energy Electron ◽  
High Energy Electron

scholarly journals Effect of Electron Irradiation on Superconductivity in Single Crystals ofBa(Fe1−xRux)2As2(x=0.24)

2014 ◽  
Vol 4 (4) ◽  
Author(s):  
R. Prozorov ◽  
M. Kończykowski ◽  
M. A. Tanatar ◽  
A. Thaler ◽  
S. L. Bud’ko ◽  
...  
Keyword(s):  
Single Crystals ◽  
Electron Irradiation

Effect of electron irradiation on the galvanomagnetic properties of InxBi2−x Te3 semiconductor single crystals

2003 ◽  
Vol 45 (12) ◽  
pp. 2249-2254 ◽  
Author(s):  
A. E. Kar’kin ◽  
V. V. Shchennikov ◽  
B. N. Goshchitskii ◽  
S. E. Danilov ◽  
V. L. Arbuzov ◽  
...  
Keyword(s):  
Single Crystals ◽  
Electron Irradiation ◽  
Galvanomagnetic Properties

scholarly journals Nanoindentation and ellipsometry of Li2ZnTi3O8& Zn2TiO4single crystals

2014 ◽  
Vol 70 (a1) ◽  
pp. C1116-C1116
Author(s):  
Lukas Perfler ◽  
Volker Kahlenberg ◽  
Christoph Wikete ◽  
Reinhard Kaindl
Keyword(s):  
Elastic Modulus ◽  
Single Crystals ◽  
Maximum Load ◽  
Industrial Applications ◽  
X Ray Diffraction ◽  
Spinel Type ◽  
Structural Investigations ◽  
Atomic Force ◽  
Diamond Indenter ◽  
Dielectric Devices

Spinel-type Li2ZnTi3O8and Zn2TiO4are useful for various industrial applications due to their interesting chemical and physical properties, for example, as promising anode materials in Li-ion batteries or as components in dielectric devices [1]. Since Li2ZnTi3O8and Zn2TiO4are expected to have high refractive indices (n calc. = 2,33 and 2,26) we tried to characterize these materials in more detail including single-crystal X-ray diffraction, nanoindentation, spectroscopic ellipsometry and electron microprobe analysis. Single crystals of Li2ZnTi3O8and Zn2TiO4were grown directly from melt at 1723 K and 1873 K, respectively. Fragments of sintered polycrystalline Li2ZnTi3O8and Zn2TiO4precursors were placed on an iridium sheet and fired in a muffle furnace from 1273 to 1723/1873 K with a heating ramp of 15 K/min. After a dwell time of 3 min the melt was cooled down to 1473 K with a ramp of 10 K/min and subsequently quenched in water. Structural investigations of the Li2ZnTi3O8and Zn2TiO4single crystals resulted in the following basic crystallographic data: cubic, P4332, a = 8.3697(2) Å, V = 586.31(3) Å3, Z = 4 and Fd-3m, a = 8.46230(17) Å, V = 605.99(2) Å3, Z = 8, respectively. Nanoindentation experiments were performed with a Berkovich diamond indenter tip to determine the hardness and elastic modulus of Zn2TiO4and Li2ZnTi3O8. For sample preparation the single crystals were embedded in resin and polished to a mirror-like surface finish. More than 150 indents with a distance of 10 µm were made with a maximum load of 20 mN. Analysis of the load-displacement curves for Zn2TiO4revealed a hardness of 10.5110.39 GPa and a reduced elastic modulus of 180.9013.92 GPa. Atomic force micrographs displayed indents with a max. depth of 28815 nm. Li2ZnTi3O8exhibited a hardness of 6.8610.45 GPa and a reduced elastic modulus of 148.8816 GPa. Zn2TiO4showed a dispersion of 0.09 due to the variation of the refractive index from 2.24 (430,8 nm, Fraunhofer G line) and 2.15 (686,7 nm, B line).

Hardness and elastic modulus from nanoindentations in nominally pure and doped MgO single crystals

2002 ◽  
Vol 82 (6) ◽  
pp. 1159-1171 ◽  
Author(s):  
D. Cáceres ◽  
I. Vergara ◽  
R. González ◽  
Y. Chen
Keyword(s):  
Elastic Modulus ◽  
Single Crystals
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