Abstract
The present study deals with oxidation behavior under residual stress of shot-peened plates of “commercially pure” zirconium exposed for 30 min at 650 °C. The influence of the shot-peening on a pre-oxidized material is presented. The results have been used to determine the influences of these chemical (pre-oxidation) and mechanical (shot-peening) treatments on the high temperature oxidation of zirconium. The oxygen profile was revealed using micro-hardness techniques and confirmed by SEM–EDS techniques. After pre-oxidation the samples were first resurfaced then shot-peened in order to introduce residual stress. A significant increase of the hardness of about +400 HV was observed on pre-oxidized shot-peened samples. Thermogravimetric analysis for 30 min at 650 °C under 200 mbar O2 showed a significantly slower oxidation rate for shot-peened samples. A comparison with our computations points out the role of the residual stresses on the diffusion and, consequently, on the oxidation.
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Raceanu, L., Optasanu, V., Montesin, T. et al. Shot-Peening of Pre-Oxidized Plates of Zirconium: Influence of Residual Stress on Oxidation. Oxid Met 79, 135–145 (2013). https://doi.org/10.1007/s11085-012-9336-0
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DOI: https://doi.org/10.1007/s11085-012-9336-0