25 August 2009 Micro structure and composition of nanocrystal phase induced by ultrasonic shot peening
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Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 737532 (2009) https://doi.org/10.1117/12.839240
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China
Abstract
Ultrasonic shot peening treatment is used to treat structural surfaces, which can enhance the overall strength, stiffness and fatigue life of the treated material. This process induces a layer of nanocrystal grains in the surface of austenitic stainless steel. The microstructure and the composition of the surface layer are examined using X-ray diffraction and transmission electron microscopy. Experimental results show that the grains are mainly composed of oxide nanocrystal particles, NiFe2O4, and a few martensite particles. Phase transformations happen during the course of the ultrasonic shot peening. The chemical composition of the nano-layer is (8.03 Cr, 4.32 Ni, 3.86 Cu, 83.79 Fe) (mass %).
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R. B. Zhao, R. B. Zhao, Y. M. Xing, Y. M. Xing, P. C. Bai, P. C. Bai, } "Micro structure and composition of nanocrystal phase induced by ultrasonic shot peening", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 737532 (25 August 2009); doi: 10.1117/12.839240; https://doi.org/10.1117/12.839240
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