Christ College Of Engineering and Technology

Alloys of magnesium have been the most preferred materials in the manufacturing industry due to many attractive properties, especially high strength to weight ratio.However, outdoor applications of this metal is very scarce because of their poor wear and corrosion resistance.This work was attempted to understand the changes in the microstructure, microhardness and the wear behavior of the composite coating effected by the direct and pulsed current.Titanium carbide nano particles along with nickel metal matrix were coated on AZ80A magnesium alloy by electro codeposition technique.Special pretreatment procedures and interlayer coatings were done to prevent the metal from being corroded during electrodeposition of nickel in watts bath.The microhardness, microstructure and composition of the composite coatings were analyzed using Vicker's microhardness tester, SEM and EDS techniques resp.It was found that the samples coated with pulsed current exhibited more refined grains thereby yielding a compact coating with higher hardness and wear resistance in comparison with the samples coated with d.c.

In this study the flexural performance of the over reinforced beam with hybrid fibers and GGBS has been exptl. investigated.Concrete is generally brittle material and it fails in brittle nature which is a major drawback in the over reinforced section.The brittle nature of the concrete can be changed by addition of fibers, proper confinement and addition of certain admixturesAlong with the confinement, Steel fiber, Glass fiber and GGBS were used in this study.Four different volume fractions (0.5%, 1.0%, 1.5%, and 2%) of hybrid fiber with 20% GGBS (as a replacement of cement) were used in this investigation.A total of 13 numbers of beams of size 120 mm × 200 mm × 2100 mm was casted.The load deflection curve, ductility index, moment curvature and flexural rigidity were investigated in this study.The overall flexural performance of the over reinforced beams has been increased by having the confinement, addition of fibers and with the presence of GGBS.