Investigation of residual strain in quartzite using neutron diffraction: Interpretation and self‐consistent modelling

2021 ◽  
Author(s):  
Jean‐Claude Guezou ◽  
Hiba Azzeddine ◽  
Monica Ceretti ◽  
Thierry Baudin
Keyword(s):  
Neutron Diffraction ◽  
Residual Strain ◽  
Self Consistent

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

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.

Neutron Diffraction as a Tool for Non-Destructive Evaluation of Ceramics

1988 ◽  
Vol 142 ◽  
Author(s):  
John H. Root ◽  
James D. Sullivan
Keyword(s):  
Grain Size ◽  
Neutron Diffraction ◽  
Residual Strain ◽  
Mechanical Characteristics ◽  
Condensed Matter ◽  
Ceramic Composites ◽  
Non Destructive Evaluation ◽  
Minority Phase ◽  
Position Dependence ◽  
Non Destructive

AbstractNeutron diffraction is a powerful probe of the properties of condensed matter. In recent years neutron diffraction has been applied to the non-destructive evaluation of mechanical characteristics of engineering components. This paper presents examples of applications to ceramic composites including the measurement of position dependence of residual strain, grain size and minority phase concentration. In addition, an example of volume-averaged crystallographic texture is presented.

scholarly journals Measuring residual strain and stress in thermal spray coatings using neutron diffractometers

2021 ◽  
Author(s):  
Nadimul Haque Faisal ◽  
Rehan Ahmed ◽  
Anil K Prathuru ◽  
Anna Paradowska ◽  
Tung Lik Lee
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Analysis ◽  
Thermal Spray ◽  
Residual Strain ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
Thermal Spray Coatings ◽  
Neutron Sources ◽  
Neutron Diffraction Analysis ◽  
Spray Coatings

Abstract Background: During thermal spray coating, residual strain is formed within the coating and substrates due to thermo-mechanical processes and microstructural phase changes. Objective: This paper provides a comprehensive guide to researchers planning to use neutron diffraction technique for thermal spray coatings, and reviews some of these studies. Methods: ENGIN-X at the ISIS spallation source is a neutron diffractometer (time-of-flight) dedicated to materials science and engineering with high resolution testing. The focus is on the procedure of using ENGIN-X diffractometer for thermal spray coatings with a view that it can potentially be translated to other diffractometers. Results: Number of studies involving neutron diffraction analysis in thermal spray coatings remain limited, partly due to limited number of such strain measurement facilities globally, and partly due to difficulty is applying neutron diffraction analysis to measure residual strain in the thermal spray coating microstructure. Conclusions: This technique can provide a non-destructive through-thickness residual strain analysis in thermally sprayed components with a level of detail not normally achievable by other techniques. Neutron sources have been used to measure strains in thermal spray coatings, and here, we present examples where such coatings have been characterised at various neutron sources worldwide, to study residual strains and microstructures.

D045 Residual Strain Determination by Rietveld Refinement of TOF Neutron-Diffraction Measurements on Deformed Uranium

2003 ◽  
Vol 18 (2) ◽  
pp. 172-172
Author(s):  
D. Balzar ◽  
G. Stefanic ◽  
S. Vogel ◽  
D. Brown ◽  
M. Bourke ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Rietveld Refinement ◽  
Residual Strain ◽  
Strain Determination
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