c e g within the range of t u2212 t cpt therefore the stock will be preliminary worked at one stage the heating temperature and required strain of the stock can be defined similar to example 1 the strain should be carried out at rate of 10 u2212 3 sec at six passes with turn of the stock through 90 u00b0 after each pass in such way that upsetting load direction will coincide with the largest stock size the strain at each stage is e 0 4 at the final stage the stock can be under superplastic conditions at 830 u00b0 c into a rod the cross section of which is equilateral triangle or square or equilateral hexagon it is require to work a stock 100 u00d7 100 u00d7 200 mm from alloy a with the initial beta transformed grain size of 5000 u03bcm into the stock of the same size and grain size of 1 2 u03bcm in order to reach that goal it is expedient preliminarily to fine the initial grain structure for this purpose the stock shall be heated up to the temperature t cpt 40 u00b0 c 960 u00b0 c and upset through the height on flat dies at e 0 25 strain and at strain rate of 10 u2212 2 sec u2212 1 and then it is formed by.