Abstract
Residual stress measurements using non-destructive techniques including neutron diffraction and X-ray diffraction are dependent on assumptions made in the analysis. For example, the different stress free reference sample and the presence of precipitates in a material can influence the measured results. Previous residual stress measurement using neutron diffraction technique in a quenched aluminium block revealed that the result can be influenced by the choice of the stress free reference sample. A benchmark method is therefore essential to validate the different measurement techniques. In this paper, the deep-hole drilling technique was used first as a benchmark technique to validate (1) the measured residual stresses in a water quenched 7449 aluminium alloy block using the neutron diffraction technique, and (2) residual stresses measured using the layer removal technique in a 7449 aluminium plate which was water quenched followed by stretching. Second, the incremental centre-hole drilling technique was used to validate the near surface residual stresses in an aluminium strip measured using the X-ray diffraction technique. The excellent correlations with the benchmark measurement methods validated the different results.
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© 2011 The Society for Experimental Mechanics, Inc.
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Hossain, S., Truman, C., Smith, D. (2011). Benchmark measurement of residual stresses in a 7449 aluminium alloy using deep-hole and incremental centre-hole drilling methods. In: Proulx, T. (eds) Engineering Applications of Residual Stress, Volume 8. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-0225-1_9
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DOI: https://doi.org/10.1007/978-1-4614-0225-1_9
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