Surface mechanical attrition treated AISI 304L steel: role of process parameters
| Autor: | Atul M. Gatey, Rajkumar P. Singh, Santosh S. Hosmani |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
010302 applied physics
Diffraction Materials science Metallurgy 02 engineering and technology Surfaces and Interfaces 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Indentation hardness Hardness Surfaces Coatings and Films law.invention Shear (sheet metal) Optical microscope law Martensite 0103 physical sciences Materials Chemistry Deformation (engineering) 0210 nano-technology |
| Zdroj: | Surface Engineering. 32:69-78 |
| ISSN: | 1743-2944 0267-0844 |
| DOI: | 10.1179/1743294415y.0000000056 |
| Popis: | In the present work, AISI 304L steel was used to investigate the effect of surface mechanical attrition treatment (SMAT) parameters on the hardness and microstructure. The surface modified by SMAT was examined using an optical microscope, SEM, electron backscattered diffraction, X-ray diffraction and microhardness measurements. The surface hardness of specimens was more than two times the hardness of non-treated core for all SMAT parameters. High density of shear bands (which formed nanosize rhombic blocks) was observed near the treated specimen surface. Density of shear bands was reliant on the size and number of balls. Deformation induced martensite (α′) was formed in surface mechanical attrition treated region. Volume per cent of α′ was enhanced with an increase in SMAT duration and number of balls. However, it was reduced with an increase in gap between vibrating plate and specimen surface. Microstructure evolution at various SMAT parameters was effectively explained using newly introduced terminology... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|