FINITE ELEMENT SIMULATION OF HIGH SPEED MACHINING Ti-6AI-4V ALLOY USING MODIFIED MATERIAL MODELS

摘要

Titanium alloys present superior properties such as high strength-to-weight ratio and resistance to corrosion but posses poor machinability. Finite element simulations can be used to study the influence of process parameters. In this work, constitutive material models are modified to simulate serrated chip formation which can be extended to other materials. In modified models, strain (flow) softening, strain hardening and thermal softening effects are coupled. The predictions are compared with orthogonal cutting tests and found to be in agreement.