Rheological Stress Behavior of B10 Copper-Nickel Alloy During Hot Deformation Process
The variation law of internal stress-strain curves of b10 alloy at 800–1050 °C and strain rate 0.01–10 s−1 was studied by thermal compression test. The rheological behavior of the alloy showed the characteristic of steady state, as the rheological stress increased rapidly to the peak stress at the beginning of the strain, and then remained unchanging or slowly increase or decrease. The rheological stress of the alloy increased when the strain rate or decreasing strain temperature increased, and the discontinuous dynamic occurred in the process of thermal compression. Moreover the constitutive equation of thermal deformation was established. The stress exponent (n) of the alloy at different temperatures was calculated and the Q-equivalent of strain activation energy was calculated.
KeywordsB10 alloy Flow stress Constitutive equations
This study was financially supported by the National Natural Science Foundation of China (Grant No.51401026) and National Key Research and Development Program of China (Grant No.2016YFB0301404).
- 14.G. Caille, S.P. Du, P. Gervais, J.G. Besner, M. Vezina, Constitutive analysis to predict high-temperature flow behavior of BFe10-1-2 cupronickel alloy in consideration of strain. Mater. Des. 65(2), 272 (2015)Google Scholar
- 15.P. Dadras, J.F. Thomas Jr., Compressive plastic instability and flow localization in Ti-6242. Res. Mech. Lett. 1(3), 97–103 (1981)Google Scholar