Evaluation of the deformability of a titanium alloy in isothermal forming
Keywords:method for assessing the deformability of alloys, isothermal plastic forming, OT4-0 titanium alloy, Normalized Cockcroft-Latham criteria
A method for assessing the deformability of metals and alloys under isothermal shaping based on biaxial tensile tests during membrane shaping has been developed and justified. The technical implementation of the method is completed.
An installation for the forming of membranes by pressure of a gaseous medium – argon gas from a sheet material in isothermal conditions at hot plastic deformation temperatures was developed.
The results of studies of sheet blanks from OT4-0 titanium alloy at temperature made it possible to establish the dependence of the limiting strain on the strain temperature in the range of 820-850 оC.
It is shown that the results of the obtained ultimate strains can be used in the Normalized Cockcroft-Latham criterion for numerical calculations of plastic shaping in isothermal conditions.
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