Lord, J D; Fry, A T; Grant, P V (2002) A UK residual stress intercomparison exercise - an examination of the XRD and hole drilling techniques. NPL Report. MATC(A)98

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Abstract

As part of the CPM4.5 project on the measurement of Residual Stress in Components. an intercomparison exercise has been carried out to determine the accuracy and uncertainties associated with the X-ray diffraction and hole drilling techniques.
The intercomparison was carried out in two iterations. In the first stage the participants were asked to perform the measurements according to their own in-house procedures. In the second iteration, a more detailed and specific test procedure was prescribed to try and reduce the scatter in the data and improve confidence in the measurement technique.
Materials examined include a shot peened spring steel, a quenched 7010 Al block, a heavily textured 6082 Al alloy and an aluminium friction stir weld. Sixteen organisations participated in the exercise.
Results showed that generally there was less scatter in the XRD data. Problems were evident with some of the hole drilling results, particularly for the shot peened steel specimen where the stress profile in the specimen was non-uniform. In both cases significant improvements in the accuracy and quality of the measurements were achieved in the second iteration.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	MATC(A)98
Subjects:	Advanced Materials Advanced Materials > Mechanical Measurement
Last Modified:	02 Feb 2018 13:17
URI:	http://eprintspublications.npl.co.uk/id/eprint/2330

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