TY - JOUR
TI - Hot deformation behavior of TC18 titanium alloy
AU - Jia Bao-Hua
AU - Song Wei-Dong
AU - Tang Hui-Ping
AU - Ning Jian-Guo
JN - Thermal Science
PY - 2013
VL - 17
IS - 5
SP - 1523
EP - 1528
PT - Article
AB - Isothermal compression tests of TC18 titanium alloy at the deformation  temperatures ranging from 25°C to 800°C and strain rate ranging from 10-4  to 10-2 s-1 were conducted by using a WDW-300 electronic universal testing  machine. The hot deformation behavior of TC18 was characterized based on an  analysis of the true stress-true strain curves of TC18 titanium alloy. The  curves show that the flow stress increases with increasing the strain rate  and decreases with increasing the temperature, and the strain rate play an  important role in the flow stress when increasing the temperatures. By  taking the effect of strain into account, an improved constitutive  relationship was proposed based on the Arrhenius equation. By comparison  with the experimental results, the model prediction agreed well with the  experimental data, which demonstrated the established constitutive  relationship was reliable and can be used to predict the hot deformation  behavior of TC18 titanium alloy.