Abstract
The stresses around the Vickers indents in alumina [surface orientation \(( { 1\mathop {\mathbf{1}}\limits^{ - }\; 0\; 2} )\)] were investigated by Cr3+ fluorescence spectroscopy, measuring the shifts in the Cr3+ R1 and R2 luminescence lines. Changes in R1 peak position can be related directly to changes in residual stress of the alumina in the sampled volume, and changes in R1 peak width arise from local stress variations due to microstructural defects such as cracks and dislocations. The intensity of the R1 and R2 fluorescence peaks was observed to decrease with increasing proximity to the indent centre due to increased scattering from residual surface and microstructural damage such as dislocations, cracks and surface debris.
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© 2014 Springer International Publishing Switzerland
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ElFallagh, F.A. (2014). Residual Stress Mapping in Alumina by Cr3+ Fluorescence Spectroscopy. In: Öchsner, A., Altenbach, H. (eds) Design and Computation of Modern Engineering Materials. Advanced Structured Materials, vol 54. Springer, Cham. https://doi.org/10.1007/978-3-319-07383-5_25
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DOI: https://doi.org/10.1007/978-3-319-07383-5_25
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