Effect of surface characteristics on electrical resistivity of shot peened SiCP/AA6061 composite by 4PCPs method

• Published in: Materials today : proceedings Vol. 19; pp. 440 - 443
• Main Authors: Venumurali, J., Reddy, G. Bhanodaya, Kumar, B. Prasad, Ramakotaiah, M.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 2019
• Subjects: Electrical resistivity; Four-Point Collinear Probes (4PCPs); Grain refinement; Shot peening; SiCP/AA 6061 composite; X-ray diffraction; X-ray diffraction; Shot peening; Four-Point Collinear Probes (4PCPs); SiCP/AA 6061 composite; Electrical resistivity; Grain refinement
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2019.07.632

The present study evaluates the effect of shot peening time on the surface characteristics and electrical resistivity of SiCP/AA6061 composite fabricated via stir casting route. The composite microstructure after casting was examined by optical microscopy. The surface characteristics and electrical resistivity were analyzed by X-Ray Diffraction (XRD) and Four-Point Collinear Probes (4PCPs) methods respectively. The results showed that the grain size decreases and Full Width at Half Maximum (FWHM) increases with increasing the shot peening time. The grain refinement (33.7 nm) and FWHM broadening (0.29°) of the sample after 140 s peening caused to lower the electrical resistivity (0.09 Ω-cm). The effect of work-hardening induced by shot peening have influenced the surface characteristics and the electrical resistivity of SiCP/AA6061 composite.