Determining Mathematics Model of Deformation Stress of Ti-Ni Alloy

摘要

Deformation stress is a characteristic property of metals,which plays an important role in metalworking. In this article, the plastic machine is utilized to determine the relation between deformation stress and thermmechinical parameters,for example deformation speed, temperature and so on . Usually, the functional relationship between them can be described as σ_s = φ(ε, ε, T) . In accordance to testing datas of Ti-Ni alloy on plastic machine, mathmatics model of deformation stress of Ti-Ni alloy is determined through statistics. The condition of experiment shows as fellow: temperature (T = 600 - 900℃); strain rate ( ε = 1.0-10.0s~(-1) ); degree of strain (ε = 0.4 - 0.8).The size of sample is (Φ7.67 - Φ7.72)x(11.83-12.69) mm. The plastic machine which belongs to Southern Ural State University can process experiment of hot reduceing to simulate rolling process.