Characterization and experimental analysis of boron carbide and rice husk ash reinforced AA7075 aluminium alloy hybrid composite

• Published in: Journal of alloys and compounds 2018-04, Vol.741, p.981-998
• Main Authors: Verma, Nishant, Vettivel, S.C.
• Format: Article
• Language: English
• Subjects: Aluminium alloy 7075; Energy dispersive spectroscopy; Hybrid composite; Scanning electron microscopy; Stir casting; Two level factorial design
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2018.01.185

This paper investigates the mechanical behavior of AA 7075-B4C -Rice Husk Ash (RHA) hybrid composite. The samples AA 7075 and 5 wt% of B4C along with 3, 5 wt % of RHA are prepared by using the Stir Casting technique. The Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) analysis are used to characterize the prepared AA7075 hybrid composite. The mechanical behaviors hardness tensile and compression are tested using their ASM standards. The fractured samples are studied using SEM. The data obtained from various test are quantitative. The hardness is higher for AA 7075-5 B4C-5RHA. The highest hardness is 121 HV at 5 wt% of B4C and 5 wt% of RHA. The highest tensile strength is 260 MPa at 5 wt% of B4C. The highest compression strength is 563 MPa at 5 wt% of B4C and 5 wt% of RHA in hybrid composite. The obtained data are analyzed on Design Expert version V.10 using two levels factorial design. The regression equations obtained from the software is validated using diagnosis plots and the optimized values of reinforcements are obtained using the desirability analysis. •Rice husk was converted into useful reinforcement material.•Fabrication of AA 7075 matrix hybrid composite reinforced with RHA and B4C particles.•Homogeneous distribution of RHA and B4C particles were obtained.•RHA particles increased the grain refinement.•RHA and B4C particles influenced the mechanical behavior.