Mechanical Behavior of Titanium Aerospace Alloy: TA6V (TiAl_6V_4) Obtained Through an Identification Strategy Using CPB06 and Barlat Yield91 Criteria

摘要

The applications of titanium alloys are traditionally present in the field of transportation, basically in aircraft engines and turbo-reactors. The major advantage of these titanium alloys is linked to their exceptional mechanical behavior presenting a good mechanical resistance in different conditions of solicitations, an important duration of life associated to a low density; these are capital parameters for this kind of applications. Therefore, titanium (mainly TA6V alloy) is now widely used in the conception of high precision manufactured products such as airplane's engine and airframes skin including fan blades for turbojet engine demanding such advantages. The present work considers the study of the plastic behavior of TA6V as an aerospace material alloy. To achieve such finality, a modeling study followed by an identification strategy is imposed. Thus, the use of constitutive law taking into consideration the microstructural state of titanium is essential to have a reliable model for a further implementation in finite element software. The results found by this modeling study and the identification using CPB06 and Barlat Yield 91 as plastic criteria, will serve to study the anisotropic mechanical behavior of this material under several solicitations.