Study of Mechanical and Microstructural Properties of Titanium chips Fabricated by Large Strain Machining Process

Abstract

Titanium alloys have gained attention in the fields of aerospace and defense sectors due to their unique strength and lightweight. A unique severe plastic deformation method (SPD) of large strain machining (LSM) was used to fabricate chips of Ti6Al4V titanium alloy in the present investigation. Since the technique employed earlier don’t match the current expectation and demand of the industry so, this technique solves the problem of previously employed technique to manufacture bulk nanostructured materials. In the present work experimental, investigation and property analysis is carried out. Response surface methodology (RSM) has been used to develop the input output relations. Feed, rake angle and speed have been considered as input parameters while shear strain, hardness and surface roughness have been considered as output parameters. Based on experiments carried out, Box-Behnken design technique has been used to develop nonlinear models. . Experiments are carried out in HMT LT21 lathe with the help of special design tool post The mechanical properties of the strips produced were measured by micro hardness tester. Also, the surface roughness and surface morphology of strips were studied using surface roughness tester and scanning electron microscope (SEM). While measuring the hardness of strips produced, it was revealed that hardness of strips was more as compared to the alloy. Similarly properties of surface were found to be improved.