Mechanical and Materials Engineering, Department of
Department of Mechanical and Materials Engineering: Faculty Publications
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Document Type
Article
Date of this Version
2021
Citation
MATER. RES. LETT. 2021, VOL. 9, NO. 3, 155–161 https://doi.org/10.1080/21663831.2020.1862933
Abstract
This manuscript reports a novel process of high-temperature laser shock peening (HTLSP) for surface strengthening of single-crystal ceramics such as sapphire and reveals its fundamental mechanisms. HTLSP at 1200°C can induce a high compressive residual stress on the surface of sapphire while minimize the damage of laser-driven shock waves. Transmission electron microscopy characteriza- tions revealed high dislocation densities near the surface, suggesting that plastic deformation at an ultrahigh strain rate was generated by the high shock wave pressure. The HTLSP-induced compres- sive residual stress can significantly improve the hardness and fracture toughness of sapphire, while maintain its outstanding optical transmittance.
Included in
Mechanics of Materials Commons, Nanoscience and Nanotechnology Commons, Other Engineering Science and Materials Commons, Other Mechanical Engineering Commons
Comments
2020 The Author(s).