A Review on Ultrasonic Machining of Titanium Alloys

International Journal of Research and Scientific Innovation (IJRSI) | Volume V, Issue XII, December 2018 | ISSN 2321–2705

A Review on Ultrasonic Machining of Titanium Alloys

Arun Kumar Singh¹, Dr. P. Sudhakar Rao²

¹ME Scholar, Department of Mechanical Engineering, NITTTR Chandigarh, India
²Assistant Professor, Department of Mechanical Engineering, NITTTR Chandigarh, India

Abstract: Due to excellent properties of Titanium and its alloy such as high strength-to-weight ratio, low thermal conductivity, and high corrosion resistance this material is widely used in aerospace, marine gas turbine engines, medical equipment’s. Due to high hardness, brittleness, low thermal conductivity of Titanium alloy, cost effective machining is critical parameter. Ultrasonic Machining is a non-traditional process which consists of abrasive in the form of slurry and tool oscillating at high frequency (about 15 to 30 kHz) and at low amplitude (20 to 100 microns). The material removal rate in Ultrasonic machining of Titanium and its alloy is very slow which makes the machining process costly.There has been a critical need for cost-effective machining processes for titanium and its alloys. The material removal rate in Ultrasonic machining is mainly related to striking and hammering of abrasive particle used in slurry form between the workpiece and ultrasonically oscillating tool. The critical parameter responsible for Material removal rate and surface finish and dimensional accuracy are amplitude and vibration of oscillating tool, feed force and pressure, Abrasive material, grain size and shape, contact area of tool, concentration of abrasive in slurry etc. So, in order to increase the MRR reduce the tool wear rate and achieve good surface finish and accuracy USM is integrated with EDM and also the Rotary USM used to make the USM cost effective machining process.

Keywords: Ultrasonic Machining, Titanium and its Alloy, Material Removal Rate(MRR), Tool Wear Rate(TWR), Surface Roughness(SR)

I. INTRODUCTION

Titanium and its alloys has excellent properties such as high strength, stiffness at elevated temperatures, chemical inertness, high specific strength, excellent corrosion resistance, and oxidation resistance due to which these are used for potential engineering applications. Because of difficulty in machining, shaping, finishing and to achieve precise dimensional accuracy makes the Titanium and its alloy components costly and hindered its application due to unavailability of cost effective conventional machining process [3].

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