中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 23 No. 12 December 2013 |
（1. School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China;
2. School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China;
3. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China）
Abstract:A method is proposed for prediction of the unstable deformation in hot forging process using both the determined thermomechnical parameter windows of the unstable deformation zones and finite element simulation. Taking Ti-6.5Al-3.5Mo- 1.5Zr-0.3Si alloy as the testing material, the thermomechnical parameter windows of the unstable deformation zones for the Ti-alloy are integrated into a commercial finite element simulation software platform. The distribution and variation of the unstable deformation zones of the alloy in hot compression process are simulated and predicted using the tailor-made finite element codes in the finite element platform. The simulation results tally with the physical experiments and the proposed method for simulation and prediction of the unstable deformation is thus verified and its efficiency is validated.
Key words: instability map; unstable deformation; instability deformation simulation; Ti-6.5Al-3.5Mo-1.5Zr-0.3Si; titanium alloy
