Author/Authors :
Shin, Keesam School of Metallurgy and Materials Engineering - Chongqing University of Science & Technology - Chongqing , China , Li, Kejian School of Metallurgy and Materials Engineering - Chongqing University of Science & Technology - Chongqing , China , Zheng, Qiang School of Metallurgy and Materials Engineering - Chongqing University of Science & Technology - Chongqing , China , Li, Chunhong School of Metallurgy and Materials Engineering - Chongqing University of Science & Technology - Chongqing , China , Shao, Bin School of Metallurgy and Materials Engineering - Chongqing University of Science & Technology - Chongqing , China , Guo, Donglin School of Metallurgy and Materials Engineering - Chongqing University of Science & Technology - Chongqing , China , Chen, Dengming School of Metallurgy and Materials Engineering - Chongqing University of Science & Technology - Chongqing , China , Sun, Jianchun School of Metallurgy and Materials Engineering - Chongqing University of Science & Technology - Chongqing , China , Dong, Jiling School of Metallurgy and Materials Engineering - Chongqing University of Science & Technology - Chongqing , China , Cao, Pengjun School of Metallurgy and Materials Engineering - Chongqing University of Science & Technology - Chongqing , China
Abstract :
Plastic deformations, such as those obtained by shot peening on specimen surface, are an efficient way to improve the mechanicalbehavior of metals. Generally, scanning electron microscopy (SEM) and electron backscattered diffraction (EBSD) are commonlyused to observe the complex microstructural evolutions, such as grain refinement and phase transformation, induced by the surfacetreatment. In this work, the microstructure of 347 stainless steel, after ultrasonic shot peening (USP) treatments, was investigated.SEM, EBSD, transmission electron microscopy, and X-ray diffraction were used to observe the microstructural evolutions, such asgrain refinement and phase transformation. Deformation depth after the USP treatment was about 200𝜇m. Grain size on the treatedsurface layer was about 100 nm, with two phases: austenite and𝛼-martensite. The percentages of the austenite and𝛼-martensitephases were 54% and 46%, respectively, which constitute an exact expression of the degree of plastic deformation on austeniticstainless steel
Keywords :
Characterization , Surface Modification , 347 Stainless Steel upon Shot Peening , USP , SEM, EBSD
