Synchrotron Radiation Application for Lattice Strain Measurements

Abstract The methods most commonly used for the determination of the elastic lattice deformation and distortion are diffraction methods, which enable to perform measurements of stresses and elastic properties of polycrystalline materials. The main advantages of diffraction methods are associated with their non-destructive character and the possibility to be used for macrostress and microstress analysis of multiphase and anisotropic materials. Diffraction methods enable taking measurements selectively only for a chosen alloy phase. This is very convenient when several phases are present in the sample since measurements of separate diffraction peaks allow the behaviour of each phase to be investigated independently. In this work, a method for analysis of diffraction with synchrotron radiation is described. The methodology is based on the measurements of lattice strains during “in situ” tensile testing for several hkl reflections and for different orientations of the sample with respect to the scattering vector. Some initial results are presented.

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Spatial Distribution of Metal Ions in Spruce Wood by Synchrotron Radiation Microbeam X-Ray Fluorescence Analysis

Holzforschung ◽

10.1515/hf.1999.078 ◽

1999 ◽

Vol 53 (5) ◽

pp. 474-480 ◽

Cited By ~ 10

Author(s):

Annica Berglund ◽

Harald Brelid ◽

Anders Rindby ◽

Per Engström

Keyword(s):

Synchrotron Radiation ◽

Metal Ions ◽

Metal Ion ◽

Fluorescence Analysis ◽

X Ray ◽

Metal Ion Analysis ◽

Before And After ◽

Non Destructive

Summary The possibility of using synchrotron radiation microbeam X-ray fluorescence (μ -XRF) for the determination of the morphological distribution of inorganic elements in wood has been investigated. A number of samples were analyzed and some of the results are presented in this paper. The new application of the method showed good results and it was concluded that the technique is useful for specific in situ metal ion analysis of wood. One of its special advantages is that it is a non-destructive method, which may allow analysis of the same sample before and after a chemical treatment. This study shows the natural distribution of a selection of metal ions in wood. Some differences in the distribution and amount of certain metals could also be observed in a sample that had been subjected to treatment with an EDTA-solution.

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A Mechanical Loading/Synchrotron X-Ray Diffraction System for In-Situ Determination of Lattice Strains

10.21236/ada430973 ◽

2005 ◽

Author(s):

Matthew Miller ◽

Paul Dawson

Keyword(s):

Mechanical Loading ◽

X Ray Diffraction ◽

X Ray ◽

Lattice Strains

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Evaluating the Mechanical Behavior of 316 Stainless Steel at the Microscale Using Finite Element Modelling and In-Situ Neutron Scattering

ASME 2010 Pressure Vessels and Piping Conference: Volume 6, Parts A and B ◽

10.1115/pvp2010-25599 ◽

2010 ◽

Cited By ~ 3

Author(s):

Dong-Feng Li ◽

Noel P. O’Dowd ◽

Catrin M. Davies ◽

Shu-Yan Zhang

Keyword(s):

Finite Element ◽

Stainless Steel ◽

Finite Element Modelling ◽

Mechanical Response ◽

Fe Model ◽

Lattice Strains ◽

Crystallographic Slip ◽

In Situ Neutron Diffraction ◽

Elastic Lattice

In this study, the deformation behavior of an austenitic stainless steel is investigated at the microscale by means of in-situ neutron diffraction (ND) measurements in conjunction with finite-element (FE) simulations. Results are presented in terms of (elastic) lattice strains for selected grain (crystallite) families. The FE model is based on a crystallographic (slip system based) representation of the deformation at the microscale. The present study indicates that combined in-situ ND measurement and micromechanical modelling provides an enhanced understanding of the mechanical response at the microscale in engineering steels.

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Multipurpose furnace for in situ studies of polycrystalline materials using synchrotron radiation

Review of Scientific Instruments ◽

10.1063/1.3262501 ◽

2009 ◽

Vol 80 (12) ◽

pp. 123301 ◽

Cited By ~ 13

Author(s):

Hemant Sharma ◽

Alix C. Wattjes ◽

Murugaiyan Amirthalingam ◽

Thim Zuidwijk ◽

Nico Geerlofs ◽

...

Keyword(s):

Synchrotron Radiation ◽

Polycrystalline Materials ◽

In Situ Studies

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In Situ Measurement of the Phase Transformation Behavior of Al2O3 Scale during High-Temperature Oxidation using Synchrotron Radiation

Materials Science Forum ◽

10.4028/www.scientific.net/msf.696.63 ◽

2011 ◽

Vol 696 ◽

pp. 63-69 ◽

Cited By ~ 16

Author(s):

Shigenari Hayashi ◽

Isao Saeki ◽

Yoshitaka Nishiyama ◽

Takashi Doi ◽

Shoji Kyo ◽

...

Keyword(s):

High Temperature ◽

Synchrotron Radiation ◽

High Temperature Oxidation ◽

Structural Changes ◽

Lattice Parameter ◽

Transformation Behavior ◽

Initial Oxidation ◽

Temperature Oxidation ◽

Diffraction Peaks

Very thin Fe-coatings, ~50nm, were found to suppress metastable Al2O3 formation on Fe-50Al and Ni-50Al alloys in our previous study. The authors proposed a mechanism whereby α-Al2O3 precipitates from the Al-saturated Fe2O3, which was formed during initial oxidation, since α-Al2O3 and α-Fe2O3 have isomorphous structures. In order to confirm the proposed mechanism, in-situ measurements were made of structural changes in the oxide scales formed on FeAl with and without Fe coating during heating and subsequent isothermal high temperature oxidation by synchrotron radiation with a two-dimensional X-ray detector. Diffraction peaks from Fe2O3 were initially observed at around 350°C on Fe-coated samples. The lattice parameter of the Fe2O3 initially increased linearly due to thermal expansion, but then rapidly decreased due to the formation of a solid solution of Fe2O3-Al2O3. α-Al2O3 started to appear at around 800°C, but no peaks from metastable Al2O3 were observed. The diffraction peaks from the α-Al2O3 on Fe-coated samples consisted of two distinct peaks, indicating that the α-Al2O3 had two different lattice parameters. These results suggest that the α-Al2O3 was formed not only by precipitation from the Al-saturated Fe2O3, but also by oxidation of Al in the substrate.

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Bohrwiderstandsmessungen, eine neue und standardisierbare Methode zur Bestimmung der Kohäsion von Naturstein: Entwicklung eines Prototypes und dessen Erprobung / Drilling force measurement system, a new standardisa i methodology to determine the stone cohesion: Prototype design and validation

Restoration of Buildings and Monuments ◽

10.1515/rbm-2000-5460 ◽

2000 ◽

Vol 6 (2) ◽

pp. 115-132 ◽

Cited By ~ 8

Author(s):

P. Tiano ◽

C. Filareto ◽

S. Ponticelli ◽

M. Ferrari ◽

E. Valentini

Keyword(s):

Force Measurement ◽

Direct Determination ◽

Drilling Force ◽

System A ◽

Stone Materials ◽

Force Measurement System ◽

Drilling Resistance ◽

Non Destructive

Abstract In the field of conservation of monumental buildings actually a standard methodology is lacking, with which it is possible to determine with the same sensitivity and reliability the "stone hardness" both at the superficial surface and at larger depths (few centimetres), both in laboratory and in situ. The use of the drilling resistance to determine the stone hardness is a very recent application and few working outdoor devices exist. The objective of this work is to validate a new and improved system to assess the drilling resistance of stones. The DFMS is portable and a quasi non-destructive device for direct determination of the "cohesion" of stone materials through the determination of their drilling resistance. The best operational features of the prototype have been established together with the assessment of the sensitivity and reliability of the system.

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Localization of Stresses in Polycrystalline Grains Measured by Neutron Diffraction and Predicted by Self-Consistent Model

Materials Science Forum ◽

10.4028/www.scientific.net/msf.681.103 ◽

2011 ◽

Vol 681 ◽

pp. 103-108

Author(s):

Anita Gaj ◽

Lea le Joncour ◽

Andrzej Baczmanski ◽

Sebastian Wroński ◽

Benoit Panicaud ◽

...

Keyword(s):

Neutron Diffraction ◽

Load Transfer ◽

Diffraction Method ◽

Lattice Strains ◽

Consistent Model ◽

Self Consistent ◽

Main Component ◽

Critical Resolved Shear Stress ◽

Elastic Lattice

Time of flight neutron diffraction method was applied to measure elastic lattice strains in austenitic steel during "in situ" tensile test. Comparing experimental data with self-consistent model, the critical resolved shear stress and hardening parameters were determined for polycrystalline grains. The result allowed us to determine the main component of the stress localization tensor, relating the rate of grain stress with the applied macrostress rate. The evolution of concentration tensor in function of the applied macrostress was analyzed. Finally, the load transfer between grains during yielding of the sample was studied.

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Lattice Strain Pole Figures Analysis in Titanium during Uniaxial Deformation

Materials Science Forum ◽

10.4028/www.scientific.net/msf.905.74 ◽

2017 ◽

Vol 905 ◽

pp. 74-80

Author(s):

David Gloaguen ◽

Baptiste Girault ◽

Jamal Fajoui ◽

Vincent Klosek ◽

Marie José Moya

Keyword(s):

Experimental Data ◽

Neutron Diffraction ◽

Lattice Strain ◽

Pure Titanium ◽

Tensile Load ◽

Uniaxial Tensile ◽

Lattice Strains ◽

Pole Figures ◽

In Situ Neutron Diffraction

A theoretical and experimental study was carry out to investigate deformation mechanisms in a textured titanium alloy. In situ neutron diffraction measurements were performed to analyze different {hk.l} family planes ({10.0}, {10.1}, {11.0} and {00.2}) and determine the corresponding internal strain pole figures. This method was applied to a pure titanium (a-Ti) submitted to a uniaxial tensile load up to 2 %. The experimental data was then used to validate the EPSC model in order to predict the distribution of lattice strains determined by neutron diffraction for various diffraction vector directions. This comparison reveals that the model results were in good agreement with the experimental data and the simulations reproduced the lattice strain development observed on the strain pole figures determined by neutron diffraction.

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