Preparations of AA6351 T6 for nine specimens were cut of dimension 10x10x6 with the use of cutter from nine welded specimens. That specimen has weld bead at its centre and HAZ zone. The specimens were subjected to coarse grinding on bench grinder. Coarse grinding is required to planarize the specimen. Then the specimens were filed using hand file in one direction to remove burs and pre preparation for polishing. Specimens were polished initially on emery paper of 600 grit grade for rough polishing then on 1000 grit grade for fine polishing followed with 1500 grit grade emery paper and then 2000 grit grade for highly fine polishing. After pre polishing specimens were polished on satin cloth for smooth and shiny surface finish on motor driven polishing disk. Fine polishing was done in a cloth polishing mill using diamond paste as polishing agent. The purpose of final polishing is to remove only surface damage. If the damage from these steps is not complete, the rough polishing step should be repeated. Finally the samples were etched for microstructure study.
Aluminum Alloy Aa 6351-T6, Mechanical Properties, Tig Welding
