Determination of X-ray Elastic Constants of Isotropic Materials with Non-Linear SIN2 ψ Diagrams

1994 ◽  
pp. 299-304
Author(s):  
Toshihiko Sasaki ◽  
Yukio Hirose
Keyword(s):  
Elastic Constants ◽  
X Ray ◽  
Isotropic Materials ◽  
Non Linear

Determination of X-Ray Elastic Constants of Isotropic Materials With Non-Linear Sin2ϕ Diagrams

1993 ◽  
Vol 37 ◽  
pp. 299-304
Author(s):  
Toshihiko Sasaki ◽  
Yukio Hirose
Keyword(s):  
Residual Stresses ◽  
Stress Analysis ◽  
Elastic Constants ◽  
Axial Stress ◽  
Stress Evaluation ◽  
X Ray ◽  
Stress Components ◽  
Non Linear ◽  
Zinc Nickel

As known well, non-linear sin2ϕ diagrams are observed from materials having either steep gradients of residual stresses paralell to the surface normal of the specimen or tri-axial stress components. Many authors have reported on this problem for several processing such as polishing and grinding etc. The authors also obtained such non-linear data from an electro-plated zinc—nickel alloy. For these cases, the sin2ϕ method is inadequate for the stress evaluation. Much attention has been given to the stress analysis from about 1970s as compared to the X-ray elastic constants for this phenomenon.

Determination of X-ray Elastic Constants in a Ti-14Al-21Nb Nb Alloy and a Ti-14Al-21Nb/SiC Metal Matrix Composite

1990 ◽  
Vol 34 ◽  
pp. 689-698 ◽  
Author(s):  
J. Jo ◽  
R. W. Hendricks ◽  
W. D. Brewer ◽  
Karen M. Brown
Keyword(s):  
Residual Stress ◽  
Plastic Deformation ◽  
Elastic Constant ◽  
Theoretical Calculation ◽  
Metal Matrix Composite ◽  
Elastic Constants ◽  
Metal Matrix ◽  
Intrinsic Value ◽  
X Ray

Residual stress values in a material are governed by the measurements of the atomic spacings in a specific crystallographic plane and the elastic constant for that plane. It has been reported that the value of the elastic constant depends on microstructure, preferred orientation, plastic deformation and morphology [1], Thus, the theoretical calculation of the elastic constant may deviate from the intrinsic value for a real alloy.

The Determination of Elastic Constants Using a Combination of X-Ray Stress Techniques

1982 ◽  
Vol 26 ◽  
pp. 259-267
Author(s):  
Charles Goldsmith ◽  
George A. Walker
Keyword(s):  
Crystal Lattice ◽  
Powder Diffraction ◽  
Elastic Constants ◽  
Polycrystalline Materials ◽  
Double Crystal ◽  
Lattice Curvature ◽  
X Ray ◽  
Measured Strain ◽  
Crystal Lattice Curvature

AbstractThe powder diffraction x-ray technique commonly used to measure strain in polycrystalline materials requires a knowledge of the elastic constants in order to convert the strain into a stress value. For many materials, these constants are not always known. Another technique to measure strain is the x-ray lattice curvature (substrate bending) method which requires no knowledge of the film elastic constants. The strain is measured in the substrate and requires only the elastic constants of the substrate to convert the measured strain into stress. Using a combination of the powder diffraction technique and a double crystal lattice curvature technique, the elastic constants of TaSi2 and WSi2 have been determined for various crystallographic directions.

scholarly journals The determination of the elastic constants of germanium by diffuse X-ray reflexions

1955 ◽  
Vol 8 (8) ◽  
pp. 506-507 ◽  
Author(s):  
S. C. Prasad ◽  
W. A. Wooster
Keyword(s):  
Elastic Constants ◽  
X Ray

Determination of single-crystal elastic constants from a cubic polycrystalline aggregate

1985 ◽  
Vol 18 (6) ◽  
pp. 513-518 ◽  
Author(s):  
M. Hayakawa ◽  
S. Imai ◽  
M. Oka
Keyword(s):  
Single Crystal ◽  
Young’S Modulus ◽  
Elastic Constants ◽  
Young's Modulus ◽  
Polycrystalline Aggregate ◽  
X Ray ◽  
Cubic Stiffness

A method for determining cubic stiffness constants from polcrystalline Young's modulus and X-ray elastic constants is described. The relations used among these elastic constants are those based on Kröner's quasiisotropic model. The X-ray elastic constants required [S1(hkl)] are obtained by measuring various (hkl) d spacings of a stressed specimen under symmetric θ–2θ scan mode. An application to an Fe–31Ni alloy has given the results: C 11 = 1.47, C 12 = 1.05 and C 44 = 1.24 × 1011 Pa.

Precise determination of elastic constants by high-resolution inelastic X-ray scattering

2008 ◽  
Vol 15 (6) ◽  
pp. 618-623 ◽  
Author(s):  
Hiroshi Fukui ◽  
Tomoo Katsura ◽  
Takahiro Kuribayashi ◽  
Takuya Matsuzaki ◽  
Akira Yoneda ◽  
...  
Keyword(s):  
High Resolution ◽  
Elastic Constants ◽  
Precise Determination ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering
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