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Proceedings Paper

Micro structure and composition of nanocrystal phase induced by ultrasonic shot peening
Author(s): R. B. Zhao; Y. M. Xing; P. C. Bai
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Paper 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 %).

Paper Details

Date Published: 25 August 2009
PDF: 7 pages
Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 737532 (25 August 2009);
Show Author Affiliations
R. B. Zhao, Inner Mongolia Univ. of Technology (China)
Y. M. Xing, Inner Mongolia Univ. of Technology (China)
P. C. Bai, Inner Mongolia Univ. of Technology (China)

Published in SPIE Proceedings Vol. 7375:
ICEM 2008: International Conference on Experimental Mechanics 2008
Xiaoyuan He; Huimin Xie; YiLan Kang, Editor(s)

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