Round‐robin test for X‐ray stress analysis standards: Optimization for discrepancy reduction

2008 ◽  
Vol 43 (1) ◽  
pp. 67-74 ◽  
Author(s):  
C Ferreira ◽  
M François ◽  
R Guillén
Keyword(s):  
Stress Analysis ◽  
Round Robin ◽  
Round Robin Test ◽  
X Ray

scholarly journals Precision of the Residual Stress determined by X-ray Diffraction: Summery and Limits

2019 ◽  
Author(s):  
Eckehard Mueller
Keyword(s):  
Residual Stress ◽  
Compressive Residual Stress ◽  
Round Robin ◽  
Surface Treatments ◽  
X Ray Diffraction ◽  
Measurement Standard ◽  
Passenger Cars ◽  
Round Robin Test ◽  
X Ray ◽  
Mechanical Surface

Today components specially for passenger cars are weight optimized. Often it is done by mechanical surface treatments. Therefore, the amount of compressive residual stress induced by the treatment must be known. The measurement is very often done by x-ray diffraction. But how precise can you determine (and not directly measured) the amount? A big question is the calibration of the equipment. A specimen must be designed and calibrated by round robin test, because no measurement standard is available.

Results of X-Ray Powder Diffraction Round Robin Tests with Corundum Plates and Powder Samples

1995 ◽  
Vol 39 ◽  
pp. 571-577
Author(s):  
V. Valvoda ◽  
D. Rafaja ◽  
R. Jenkins
Keyword(s):  
Powder Material ◽  
Powder Diffraction ◽  
Round Robin ◽  
Specimen Preparation ◽  
Round Robin Test ◽  
X Ray ◽  
Intensity Measurements ◽  
Powder Diffractometer ◽  
Powder Samples ◽  
Line Positions

Repetitions of the round robin test on powder diffractometer sensitivity and round robin test of intensity measurements, using two almost identical groups of participants, enabled a comparison to be made of results obtained in different tests. Two forms of corundum test samples were used: (i) sintered plates in tests A8 and A9, and (ii) powder samples in test Bl . A rough comparison of the influence of different methods of specimen preparation from the powder material in different laboratories in test Bl is thus possible with respect to the (almost) uniform sintered plates used in tests A8 and A9. The parameters under investigation were the line positions (and/or inter-planar d-spacing) and intensities of eleven reflections occurring at the 20 angles ranging from 25° to 136° for Cu Kα-radiation

French round-robin test of X-ray stress determination on a shot-peened steel

2000 ◽  
Vol 40 (4) ◽  
pp. 361-368 ◽  
Author(s):  
M. François ◽  
F. Convert ◽  
S. Branchu
Keyword(s):  
Round Robin ◽  
Stress Determination ◽  
Round Robin Test ◽  
X Ray

scholarly journals Laboratory X-ray tomography for metal additive manufacturing: Round robin test

2019 ◽  
Vol 30 ◽  
pp. 100837 ◽  
Author(s):  
Anton du Plessis ◽  
Stephan G. le Roux ◽  
Jess Waller ◽  
Philip Sperling ◽  
Nils Achilles ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Round Robin ◽  
Round Robin Test ◽  
X Ray ◽  
Metal Additive Manufacturing ◽  
Metal Additive

scholarly journals Recommendations for the measurement of residual stresses in welded joints by means of X-ray diffraction—results of the WG6-RR test

2020 ◽  
Author(s):  
Th. Nitschke-Pagel
Keyword(s):  
Residual Stresses ◽  
Boundary Conditions ◽  
Welded Joints ◽  
High Reliability ◽  
Measurement Techniques ◽  
Round Robin ◽  
X Ray Diffraction ◽  
Round Robin Test ◽  
X Ray

AbstractResidual stresses in welded joints are often of extended interest in order to evaluate unexpected failures or distortions. Since the possibilities to calculate residual stresses in welds are still strongly limited, the measurement techniques are still of great importance. Several measurement techniques with particular possibilities and limitations are available today where especially the different diffraction methods are used mostly. The material, weld type, and the size of the components are important for the quality of the results obtained with different methods as well as the environment where the measurements have to be carried out. The paper shall give an overview of the results of a round robin test on the application of XRD on butt welded joints which has been carried out in cooperation of different experienced laboratories. The results show the high reliability of XRD measurements in welds, if the measurements are performed under well-defined boundary conditions. The experiences can be used as a recommendation about useful measurement conditions the expectable quality of the results.

Calibration of straight total reflection X-ray fluorescence spectrometry — results of a European Round Robin test

2001 ◽  
Vol 56 (11) ◽  
pp. 2283-2292 ◽  
Author(s):  
I. Rink ◽  
P. Rostam-Khani ◽  
J. Knoth ◽  
H. Schwenke ◽  
S. de Gendt ◽  
...  
Keyword(s):  
Round Robin ◽  
Total Reflection ◽  
Fluorescence Spectrometry ◽  
Round Robin Test ◽  
X Ray

First Total Reflection X-Ray Fluorescence round-robin test of water samples: Preliminary results

2014 ◽  
Vol 101 ◽  
pp. 6-14 ◽  
Author(s):  
Laura Borgese ◽  
Fabjola Bilo ◽  
Kouichi Tsuji ◽  
Ramón Fernández-Ruiz ◽  
Eva Margui ◽  
...  
Keyword(s):  
Water Samples ◽  
Round Robin ◽  
Total Reflection ◽  
Round Robin Test ◽  
X Ray ◽  
Preliminary Results
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