| Title |
A Study on Hot Deformation Behavior of Invar Alloy |
| Authors |
조상현(Sang Hyun Cho); 장병록(Byoung Lok Jang); 김희중(Hi Jung Kim); 유연철(Yeon Chul Yoo) |
| Abstract |
The high temperature deformation behavior of an lnvar alloy was investigated in the temperature range of 800∼1100℃ at the strain rate range of 4.0×10^(-2)∼2.6×10^0/sec. Flow curves and microstructures exhibited this alloy had restoration by dynamic recrystallization combined with dynamic recovery. The temperature(T) and strain rate(ε˙) dependence of the peak stress (σ) was described by the Zener-Hollomon parameter, Z=ε˙ exp(-335kJ/RT)=A[sinh(0.0103α)]^(4 96). The size of dynamically recrystallized grains decreased as Z increases. The distribution of precipitates (Mn, Cr, etc.) was also investigated. The strain induced precipitation was occurred during the hot deformation. |