Elastic modulus of TI-6AL-4V titanium alloy

E.A. Trofimov1, R.Y. Lutfullin1, R.M. Kashaev1
1Institute for Metals Superplasticity Problems RAS, 39 Khalturin St., 450001, Ufa, Russia
The manuscript presents results of Young's modulus (E) measurements for two-phase titanium alloy Ti-6Al-4V. The estimation of elasticity modulus (E) was made using three independent methods: standard mechanical tests (tensile test) on an electronic dynamometer “Instron”, the method measurement of sound speed propagation and the method of nanoindentation using nanohardness – testing scanning machine “Nanoscan3D”. The elastic properties were studied for Ti-6Al-4V alloy in different structural states: nanostructured (NS), microcrystalline (MC) and coarse-grained (CG). The elastic modulus α - and β - phases were measured by means of nanoindatation methods. It is shown that a value of elasticity modulus E for the Ti – 6Al – 4V alloy in the CG state is less than in the NS state by more than 20% that is likely to be attributed to the change in amount ratio between α and β phases characterized by different elastic properties.
Received: 20 November 2014   Revised: 23 March 2015   Accepted: 06 April 2015
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