Mechanical behavior of titanium alloy Ti-6Al-4V with unprepared microstructure under jumpwise variations of the strain rate in the superplastic state

We present the results of extension tests with superplastic specimens made of structural titanium alloy with unprepared (coarse-grained) microstructure. The tests were performed at a constant temperature and constant or piecewise constant strain rate. It was shown that, in the case of a jumpwise decrease in the strain rate, the typical shape of the strain diagram depends on the test temperature. Some variations in the original microstructure are demonstrated