Papers by Author: Satish V. Kailash

Abstract: Friction stir surfacing is done to deposit commercial pure Al on medium carbon steel under open atmosphere conditions. Roughness of the substrate, normal load and tool rotation are the variables. Deposition is analysed with respect to continuity, width, composition and phase parameters. Good deposition is observed under a limited set of load and rotation speed. The deposit contains a mixture of steel and aluminium particles.

Abstract: The main aim of the work is to analyze the influence of welding speed and tool rotation speed on the forming behavior of FSW blanks. The FSW blanks are made of 6061 Al sheet of 2.1 mm thickness. The welded sheets are made at two different optimized levels of welding speed (90 and 100mm/min) and tool rotation speed (1300 and 1400 rpm). The effect of FSW parameters on the forming limit curve (FLC) and thickness distribution was analyzed by performing limit dome height (LDH) tests at few pre-defined stretching strain paths. It is observed that FSW blanks exhibit more formability as compared to un-welded sheets. The forming limit is found to improve with increase in tool rotation speed and it decreases with increase in welding speed. An attempt has been made to relate the thinning gradient developed during necking with the forming limit at different welding conditions.