STATISTICAL ANALYSIS OF BIMODAL MRP FLUID USING RSM

Abstract

Bimodal magnetorheological polishing (BMRP) fluid samples have been synthesized in the present study. BMRP fluid samples contain two types of carbonyl iron powder of CS and HS grades in different volumetric proportions. Carbonyl iron powder of CS grade varies from 14 vol% to 20 vol% and HS grades varies from 0 vol% to 6 vol% while silicon carbide abrasives with 800 mesh size has been kept fixed at 25 vol% and rest is base fluid. Design of experiment (DOE) with three factors and five levels has been used to develop the experimental plan for investigating the effects of process parameters on the response. The magnetorheological characterization of BMRP fluid samples have been carried out on (Anton Paar MCR301 with MRD 180 attachment) magnetorheometer at different current level. The response such as yield shear stress, maximum shear stress and maximum viscosity has been statistically analyzed using response surface methodology. An effective second order response surface model for the response was obtained with significant factors and their interactions.