Mechanical Tests and Construction of Analytical Models of the Behavior of Materials Under Superplastic Conditions. Part II*

Abstract

Different test methods are discussed for determining the mechanical properties of materials in the superplastic state. The flow stress depends on the degree and rate of deformation, a structural parameter, and temperature. The rheology and mechanics of superplastic deformation are discussed. In response to an order from the company EADS (Airbus), a new method was developed and has yielded good results in the testing of titanium alloys and the construction of mathematical models. The method, for conducting tests and then approximating materials’ mechanical properties, is of great interest for the purpose of obtaining adequate predictions of the forming of materials under pressure.