Die Ermittlung von Elastizitätsmodul und Poissonzahl kubisch kristallisierender isotroper Werkstoffe aus röntgenographischen Messungen / Determination of Young’s modulus and Poisson’s number of isotropic bodies of cubic cristals from X-ray measurements / Determination de module d’élasticité et de nombre de Poisson dans matériaux isotropiques cristalliser cubiques par diffractometrie-X

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.

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On the Measurement of Particle Contact Curvature and Young’s Modulus Using X-ray μCT

Applied Sciences ◽

10.3390/app11041752 ◽

2021 ◽

Vol 11 (4) ◽

pp. 1752

Author(s):

Li Ge Wang ◽

Zhipeng Li ◽

Lianzhen Zhang ◽

Rongxin Zhou ◽

Xizhong Chen

Keyword(s):

Young’S Modulus ◽

Mechanical Response ◽

Young's Modulus ◽

Particle Morphology ◽

Digital Information ◽

X Ray ◽

X Ray Computed ◽

Micro Tomography ◽

Global Fitting

Contact curvature plays a pivotal role in the Young’s modulus determination and mechanical response of a particle. This paper presents the sensitivity analysis of a particle morphology to contact curvature and its influence on the Young’s modulus determination during the elastic deformation of a particle. X-ray computed micro-tomography (μCT) was conducted to obtain the prototype of a single particle. The digital information of the scanned particle, including 2D slices and 3D rendering was processed and the variation of contact curvature of the particle was examined using the circular (spherical at 3D) and polynomial fitting methods. The fitting sections of the particle are taken into account. The effect of contact curvature on Young’s modulus determination was investigated and it was found that Young’s modulus changed substantially from global fitting to local fitting. Young’s modulus is highly related to the surface roundness, which exerts a significant influence on the determination of Young’s modulus.

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Determination of Young's modulus and Poisson's ratio of thin films by combining sin2ψ X-ray diffraction and laser curvature methods

Thin Solid Films ◽

10.1016/j.tsf.2009.05.042 ◽

2009 ◽

Vol 517 (24) ◽

pp. 6759-6766 ◽

Cited By ~ 17

Author(s):

Jeh-Yin Chang ◽

Ge-Ping Yu ◽

Jia-Hong Huang

Keyword(s):

Thin Films ◽

Young’S Modulus ◽

Poisson’S Ratio ◽

Young's Modulus ◽

Poisson's Ratio ◽

X Ray Diffraction ◽

X Ray

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Determination of Young's modulus and Poisson's ratio of thin films by X-ray methods

Thin Solid Films ◽

10.1016/j.tsf.2013.03.121 ◽

2013 ◽

Vol 544 ◽

pp. 201-205 ◽

Cited By ~ 7

Author(s):

Wei-En Fu ◽

Yong-Qing Chang ◽

Bo-Ching He ◽

Chung-Lin Wu

Keyword(s):

Thin Films ◽

Young’S Modulus ◽

Poisson’S Ratio ◽

Young's Modulus ◽

Poisson's Ratio ◽

X Ray ◽

Ray Methods

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Microfibril Angle Determination of Rattan Fibers and its Influence on the Properties of the Cane

Holzforschung ◽

10.1515/hf.2000.072 ◽

2000 ◽

Vol 54 (4) ◽

pp. 437-442 ◽

Cited By ~ 5

Author(s):

Willie P. Abasolo ◽

Masato Yoshida ◽

Hiroyuki Yamamoto ◽

Takashi Okuyama

Keyword(s):

Young’S Modulus ◽

Staining Method ◽

Young's Modulus ◽

Microfibril Angle ◽

Curvilinear Relationship ◽

Longitudinal Shrinkage ◽

X Ray Diffraction ◽

X Ray ◽

Rattan Cane

Summary The microfibril angle of rattan fibers was determined using the iodine staining method and the X-ray diffraction technique. The two were compared to assess the applicability of the X-ray technique in estimating the actual microfibril angle (MFA) of the fiber walls. Likewise, longitudinal Young's modulus and longitudinal shrinkage were evaluated to determine the influence of MFA on the properties of the cane. The X-ray technique gave an accurate and objective estimate of the actual MFA of the fiber walls. A nonlinear relationship existed between MFA and longitudinal Young's modulus while a curvilinear relationship was observed between MFA and longitudinal shrinkage. This pattern is similar to the behavior of wood. Thus, it was deduced that the influence of microfibril angle on the properties of rattan cane is similar to its influence on the properties of wood.

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Mechanical properties of FeAlSi powders prepared by mechanical alloying from different initial feedstock materials

Matériaux & Techniques ◽

10.1051/mattech/2018063 ◽

2019 ◽

Vol 107 (2) ◽

pp. 207 ◽

Cited By ~ 2

Author(s):

Jaroslav Čech ◽

Petr Haušild ◽

Miroslav Karlík ◽

Veronika Kadlecová ◽

Jiří Čapek ◽

...

Keyword(s):

Mechanical Properties ◽

Mechanical Alloying ◽

Young’S Modulus ◽

Milling Time ◽

Young's Modulus ◽

Element Model ◽

X Ray Diffraction ◽

X Ray ◽

Powder Particles ◽

Complete Homogenization

FeAl20Si20 (wt.%) powders prepared by mechanical alloying from different initial feedstock materials (Fe, Al, Si, FeAl27) were investigated in this study. Scanning electron microscopy, X-ray diffraction and nanoindentation techniques were used to analyze microstructure, phase composition and mechanical properties (hardness and Young’s modulus). Finite element model was developed to account for the decrease in measured values of mechanical properties of powder particles with increasing penetration depth caused by surrounding soft resin used for embedding powder particles. Progressive homogenization of the powders’ microstructure and an increase of hardness and Young’s modulus with milling time were observed and the time for complete homogenization was estimated.

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