Microstructural characterization of warm-worked commercially pure aluminum

Plane strain deformation microstructure of warm-worked aluminum

“…4(e). This is similar to what was found in a study of the 50% thickness reduction specimen [11]. In the warmworked regime, dynamic recovery occurs, so that polygonization of dislocation walls and subgrain growth can occur.…”

“…The same scaling function has been used in the previous study of warm-worked commercially pure aluminum under 50% thickness reduction [11]. When the boundary misorientations from 50% and 65% thickness reduction specimens were scaled together, it was found that the scaling could be applied quite well, the fitting parameter˛= 2.03, and the coefficient of determination r 2 = 0.95, see Fig.…”

“…Hughes et al [8] suggested that this is due to the different formation mechanisms for GNBs and IDBs. The previous study of this group [11] however found scaling of boundary misorientations could be applied to all dislocation boundaries of warm-worked microstructure. The same scaling procedure was applied in the present research.…”

“…Scaling of the distribution of (a) subgrain boundary misorientations, and (b) subgrain sizes formed under 50% and 65% thickness reduction at different deformation temperatures and strain rates. The data for 50% thickness reduction were from reference [11].…”

“…[1][2][3][4][5][6][7][8][9][10]), our knowledge about warm-worked microstructure in fcc metals is still relatively limited, and lack of systematic study on the effect of deformation temperature and strain rate on the deformation microstructure. As a part of a program to characterized warm-worked deformation microstructure of fcc metals [11], the present paper reports the deformation microstructure of commercially pure aluminum warm-worked by plane strain compression to 65% thickness reduction at temperatures between 150 • C and 300 • C, under two strain rates, 5 × 10 −2 s −1 and 5 × 10 −4 s −1 .…”