کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1639587 | 1517043 | 2008 | 4 صفحه PDF | دانلود رایگان |

Tensile tests of solid solution treated 7050 aluminum alloy were conducted to different strain degrees (0.1, 0.4, 0.6 and failure) at 460 °C with the strain rate of 1.0 × 10−4–1.0 × 10−1s−1. The boundary misorientation angle evolution during hot deformation of the 7050 aluminum alloy was studied by EBSD technique and the fracture surfaces were observed using SEM. A linear relationship between the increase in the average boundary misorientation angle and the true strain at different strain rates is assumed when aluminum alloy is deformed at 460 °C. The increasing rate of average boundary misorientation angle is 15.1°, 15.7° and −0.75° corresponding to the strain rate of 1.0 × 10−4, 1.0 × 10−2 and 0.1 s−1, respectively. The main softening mechanism is continuous dynamic recrystallization when the strain rates are 1.0 × 10−4 and 1.0 × 10−2 s−1, and it is dynamic recovery when strain rate is 0.1 s−1.
Journal: Transactions of Nonferrous Metals Society of China - Volume 18, Issue 4, August 2008, Pages 795-798