| Title |
High-Temperature Ductility Loss of Al-Mg-Be Alloy |
| Authors |
김병일(Byung Il Kim); 길전동수(Fuyuki Yoshida); 중도영치(Hideharu Nakashima); 길영일출남(Hideo Yoshinaga) |
| Keywords |
High-temperature ductility Loss; Strain rate; Reduction of area; Zenner-Hollomon parameter; Cavity growth; Cleavage fracure; Ductile fracture |
| Abstract |
The high temperature ductility behaviors of Al-Mg-Be alloy containg particles in grain have been studied using a tensile test and scanning electron microscopy. The results show that the reduction of area increased with increasing temperature up to 523K and the minimum ductility was found to be at 573K for 8.3 × 10-5s-1 strain rate. The rate of ductility loss of the Al-Mg-Be alloy deformed at 573K under strain rate, 8.3 × 10-4s-1 was higher than that of under a strain rate, 8.3 × 10-5s-1 However, the maximum ductility drop was occured at the same temperature, 573K for various strain rate. The reduction of area was not determined uniqely by Zenner-Hollomon parameter, Z=εexp(Q/RT). The cleavage fracture showing the ductility loss at higher temperature was associated with cavity growth as well as interlinkage of cavities. On the other hand, ductile fracture was observed on the fracture surface at lower temperature. |