Dynamical diffraction peak splitting in time-of-flight neutron diffraction

2006 ◽  
Vol 89 (23) ◽  
pp. 233515
Author(s):  
E. Üstündag ◽  
R. A. Karnesky ◽  
M. R. Daymond ◽  
I. C. Noyan
Keyword(s):  
Neutron Diffraction ◽  
Time Of Flight ◽  
Diffraction Peak ◽  
Dynamical Diffraction ◽  
Peak Splitting

scholarly journals Through-Thickness Microstructure Characterization in a Centrifugally Cast Austenitic Stainless Steel Nuclear Reactor Primary Loop Pipe Using Time-of-Flight Neutron Diffraction

2021 ◽  
Vol 5 (2) ◽  
pp. 12
Author(s):  
Matthew M. Schmitt ◽  
Daniel J. Savage ◽  
James J. Wall ◽  
John D. Yeager ◽  
Chanho Lee ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Neutron Diffraction ◽  
Time Of Flight ◽  
Radial Distance ◽  
Ultrasonic Waves ◽  
Science Center ◽  
Los Alamos ◽  
Inspection Method ◽  
Centrifugally Cast

The US code of Federal Regulations mandates regular inspection of centrifugally cast austenitic stainless steel pipe, commonly used in primary cooling loops in light-water nuclear power plants. These pipes typically have a wall thickness of ~8 cm. Unfortunately, inspection using conventional ultrasonic techniques is not reliable as the microstructure strongly attenuates ultrasonic waves. Work is ongoing to simulate the behavior of acoustic waves in this microstructure and ultimately develop an acoustic inspection method for reactor inspections. In order to account for elastic anisotropy in the material, the texture in the steel was measured as a function of radial distance though the pipe wall. Experiments were conducted on two 10 × 12.7 × 80 mm radial sections of a cast pipe using neutron diffraction scans of 2 mm slices using the HIPPO time-of-flight neutron diffractometer at the Los Alamos Neutron Science Center (LANSCE, Los Alamos, NM, USA). Strong textures dominated by a small number of austenite grains with their (100) direction aligned in the radial direction of the pipe were observed. ODF analysis indicated that up to 70% of the probed volume was occupied by just three single-grain orientations, consistent with grain sizes of almost 1 cm. Texture and phase fraction of both ferrite and austenite phases were measured along the length of the samples. These results will inform the development of a more robust diagnostic tool for regular inspection of this material.

Time-of-flight neutron diffraction of nanocrystalline powders of nonstoichiometric niobium carbide NbC0.77

2017 ◽  
Vol 59 (3) ◽  
pp. 607-612 ◽  
Author(s):  
A. S. Kurlov ◽  
A. I. Gusev ◽  
V. S. Kuznetsov ◽  
I. A. Bobrikov ◽  
A. M. Balagurov ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Niobium Carbide ◽  
Time Of Flight ◽  
Nanocrystalline Powders

Imaging crystallographic phases using time-of-flight neutron diffraction

2006 ◽  
Vol 385-386 ◽  
pp. 1203-1205 ◽  
Author(s):  
Matthias Gutmann ◽  
Winfried Kockelmann ◽  
Laurent Chapon ◽  
Paolo G. Radaelli
Keyword(s):  
Neutron Diffraction ◽  
Time Of Flight

scholarly journals Time-of-Flight Three Dimensional Neutron Diffraction in Transmission Mode for Mapping Crystal Grain Structures

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Alberto Cereser ◽  
Markus Strobl ◽  
Stephen A. Hall ◽  
Axel Steuwer ◽  
Ryoji Kiyanagi ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Three Dimensional ◽  
Time Of Flight ◽  
Transmission Mode ◽  
Grain Structures

Measuring strain and stress distributions along rebar embedded in concrete using time-of-flight neutron diffraction

2014 ◽  
Vol 25 (2) ◽  
pp. 025602 ◽  
Author(s):  
H Suzuki ◽  
K Kusunoki ◽  
Y Hatanaka ◽  
T Mukai ◽  
A Tasai ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Time Of Flight ◽  
Stress Distributions

Strain and Particle Size of Palladium Metal Powders by Time-of-Flight Neutron Diffraction

1990 ◽  
pp. 403-407 ◽  
Author(s):  
A. C. Lawson ◽  
J. W. Conant ◽  
C. L. Talcott ◽  
M. A. David ◽  
J. Vaninetti ◽  
...  
Keyword(s):  
Particle Size ◽  
Neutron Diffraction ◽  
Time Of Flight ◽  
Metal Powders ◽  
Palladium Metal

[Ru(ND3)6](SCN)3 at 20 K by Time-of-Flight Neutron Diffraction

1995 ◽  
Vol 51 (12) ◽  
pp. 2517-2520 ◽  
Author(s):  
P. A. Reynolds ◽  
B. N. Figgis ◽  
A. J. Schultz
Keyword(s):  
Neutron Diffraction ◽  
Time Of Flight
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