Optimization of nanosilica toughened friction stir welded nylon 6 6 thick plates An energy reduction approach

Abstract

The mechanical, wear, fatigue, and microstructure properties of friction newlinestir welded Nylon 66 thermoplastic were investigated in this study. The major goal newlineof this study was to see how the addition of nanosilica particles and weaving newlinegeometry affected the mechanical, wear, fatigue, and microstructural behaviour of newlinenylon 66 friction stir welding, and how the nanosilica addition and weaving newlinegeometry improved weld quality. The welding procedure was carried out with the newlinehelp of a non-consumable threaded pin tool with a rectangular weave pattern, as newlinewell as process parameters like stirring speed (rpm), step size (mm), and nanosilica newlinewt. %. newlineASTM standards were used to analyse the mechanical, fatigue, wear, newlineand microstructure properties. The weld with 1500 rpm, 2mm step size, and 2wt. newline% nanosilica particle has the highest tensile strength of 53MPa and microhardness newlineof 65 Shore-D, according to the tensile results. With suitably agitated nylon 66 newlineparent material, the microstructure exhibited homogeneous dispersion of newlinenanosilica particles in the welding zone. newlineWith a tool speed of 1500 rpm, 2wt.% nanosilica, and a 2mm step size, a newlinemaximum flexural strength of 76 MPa was reached.This is a near 14 % newlineimprovement over plain weave with un-filled nanosilica nylon weld. The highest newlineenergy absorption of 0.48J is achieved by combining the Izod impact toughness of newline2wt.% nanosilica with a 1 mm step size. This is a 54 % increase over the previous newlineyear.With 1500 rpm,2 wt.% nanosilica, and a 2mm step size, a weld nugget with a newlinestrength factor of 92 was formed. newlineThis perfect combination produces a weld bead that is mechanically newlinestronger in general. All FSW welds had a lower microhardness than the parent newlinemetal.The 66 Shore-D microhardness of the 2wt. % nanosilica dispersed friction newlinestirred weld, on the other hand, is near to 88 % of the parent metal. newline