Titanium has many desirable Properties for structural application in aviation and space industry. In Particular TiA6V4 titanium alloy most widely used in aerospace industry, has poor weldability, and is sensitive to high welding temperature. It is always preferred that titanium alloys bonded together or even with polymer sheets using some kind of adhesive. Titanium alloy often undergoes some specific surface treatment for improving its adhesion properties. In this study, we report the investigation of surface modification phenomena of titanium TiA6V4 Alloy surface by a combination of mechanical treatment followed by atmospheric plasma ion implantation treated under the condition of nearly atmospheric pressure. The aims of our study are to obtain optimum conditions with high surface energy and to understand the surface phenomena for increasing the adhesion property.

Surface energy of untreated and treated surfaces of titanium is estimated by contact angle analysis using Sessile Drop Technique. Surface roughness of untreated and treated Titanium surface is estimated with Surface roughness Profiler. Optical microscopy and SEM analysis was performed to examine surface characteristics. A substantial improvement in surface energy of Titanium observed after these treatments. The surface energy of titanium increases with increasing mechanical treatment time up to a certain limit. Then further improvement in surface energy observed after treatment with atmospheric pressure plasma. Atmospheric pressure plasma treatment increased the surface energy to higher values. However this higher energy surface is available for a limited time as this activated titanium surface again react very fast with air contaminations and organic particles. Durability of atmospheric pressure plasma treated surface and optimum time for adhesion bonding available after atmospheric pressure plasma treatment for reported in this investigation.

This technique has low treatment cost and environment friendly thus highly acceptable for aviation and space industry.