FEM Simulation of Hot Compression of TiAl on Gleeble Simulator
Thermo-mechanical coupled simulations based on finite element method have been performed for the compression process of TiAl alloy bars on a GLEEBLE 3800 thermo-mechanical simulator. The changes of temperature distribution,strain field and the source of error from the hot compression test have been analyzed in detail. The simulation shows that the temperature distribution in specimen is not uniform during the test,especially for specimen with low thermal conductivity and heat capacity. The nonuniform temperature distribution will cause nonuniform deformation in the sample, with the maximum strain in the central region,and the two ends of specimen are much less deformed due to the lower temperature, therefore far from the uniform strain commonly assumed in Gleeble result analysis. The main error from the non-uniform temperature distribution is not easy to estimate analytically, while FEM based simulation can be a practical approach to help improving the accuracy of the constitutive relations from Gleeble measurements.
TiAl alloy Gleeble test finite element simulation hot compression temperature distribution
D. J. Yu C. Y. Teng D. S. Xu C. G. Bai G. Z. Wei R. Yang
College of Sciences, Northeastern University, Shenyang, 110004 , China Institute of Metal Research , Institute of Metal Research , Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China College of Sciences, Northeastern University, Shenyang, 110004 , China
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
1549-1552
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）