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http://dx.doi.org/10.3365/KJMM.2010.48.09.807

Formation of Nano-structure and Compressive Residual Stress on AISI304 Stainless Steel by Ultrasonic Nanocrystalline Surface Modification  

Cho, In-Shik (Dept. of Hybrid Eng., Sunmoon University)
Dong, Ji-Ling (School of Nano and Advanced Materials, Changwon University)
Yoo, Dae-Hwang (School of Nano and Advanced Materials, Changwon University)
Suh, Jung-Hwa (School of Nano and Advanced Materials, Changwon University)
Amanov, Auezhan (Dept. of Mechanical Eng., Sunmoon University)
Shin, Kee-Sam (School of Nano and Advanced Materials, Changwon University)
Lee, Chang-Soon (Dept. of Hybrid Eng., Sunmoon University)
Pyoun, Young-Shik (Dept. of Mechanical Eng., Sunmoon University)
Park, In-Gyu (Dept. of Hybrid Eng., Sunmoon University)
Publication Information
Korean Journal of Metals and Materials / v.48, no.9, 2010 , pp. 807-812 More about this Journal
Abstract
In this paper, the Ultrasonic Nanocrystalline Surface Modification (UNSM) surface treatment process was used to induce compressive residual stress and nanocrystalline structure by severe plastic deformation on the UNSM-treated surface. The test results for AISI304 stainless steel demonstrated that the grain size was found to be 23 nm, the dislocation density was increased by $0.2085{\times}10^{18}\;m^{-2}$, and the volume fraction of martensite is defined as 27.6% from austenite so that the surface hardness of the surface is increased from 200 Hv up to 515 Hv. The initial tensile residual stress is changed from 300 MPa to a compressive residual stress of 500 MPa after UNSM treatment. In addition, UNSM was applied under five various conditions, and the results of those conditions were defined as a function of depth quantitative.
Keywords
nanostructured materials; surface modification; residual stress; ultrasonics;
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Times Cited By KSCI : 3  (Citation Analysis)
Times Cited By SCOPUS : 1
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