Open AccessEffect of ultrasonic pretreatment on the superplasticity of titanium alloy Ti-6Al-4V processed by ECAP
Author(s) -
A. A. Mukhametgalina,
M. A. Murzinova,
А. А. Назаров
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/672/1/012046
Subject(s) - superplasticity , materials science , metallurgy , flow stress , titanium alloy , elongation , alloy , ultimate tensile strength , deformation (meteorology) , pressing , ultrasonic sensor , strain rate , tensile testing , composite material , physics , acoustics
Improving the superplasticity characteristics of alloys widely used in industry, such as titanium alloy Ti-6Al-4V, is an important practical problem. Processing by the methods of severe plastic deformation can reduce the temperature of superplasticity. However, the material exhibits high flow stresses. In this work we studied the effect of preliminary ultrasonic treatment with an amplitude of oscillating tension-compression stresses of 100 MPa on the characteristics of superplasticity of the Ti-6Al-4V alloy processed by equal channel angular pressing (ECAP). It is shown that high-frequency oscillating stresses resulted in the reduction of the flow stress, the increase in elongation and the strain rate sensitivity coefficient during tensile tests in the conditions of superplasticity.