J. Mater. Sci. Technol. ›› 2018, Vol. 34 ›› Issue (5): 821-831.DOI: 10.1016/j.jmst.2017.04.019
• Orginal Article • Previous Articles Next Articles
Saiyi Liab(), Liang Yanga, Nan Qina
Received:
2017-02-25
Revised:
2017-03-29
Accepted:
2017-04-10
Online:
2018-05-10
Published:
2018-05-04
Saiyi Li, Liang Yang, Nan Qin. Development of through-thickness texture gradient and persistence of shear-type textures during annealing of commercial purity aluminium sheet processed by accumulative roll-bonding[J]. J. Mater. Sci. Technol., 2018, 34(5): 821-831.
Miller indicesa | Euler angles [°]a | Relevant fibers | |||
---|---|---|---|---|---|
φ1 | Φ | φ2 | |||
Rolling | |||||
Bs | (110)[1\(\overline{1}\)2]/(110)[1\(\overline{1}\)\(\overline{2}\)] | 54.74/-54.74 | 90 | 45 | β |
S | (213)[\(\overline{3}\)\(\overline{6}\)4] | 58.98 | 36.7 | 63.4 | β |
Cu | (112)[\(\overline{1}\)\(\overline{1}\)1]/(112)[11\(\overline{1}\)] | 90/-90 | 35.3 | 45 | β |
D | (4411)[1\(\overline{1}\)1\(\overline{1}\)8]/(4411)[11118ˉ] | 90/-90 | 27.2 | 45 | β |
Simple shear | |||||
A1* | (111)[\(\overline{1}\)\(\overline{1}\)2]/(111)[2\(\overline{1}\)\(\overline{1}\)] | 90/-30 | 54.7 | 45 | {111}〈uvw〉 |
A2* | (111)[1\(\overline{2}\)1]/(111)[11\(\overline{2}\)] | 30/-90 | 54.7 | 45 | {111}〈uvw〉 |
A/\(\overline{A}\) | (111)[0\(\overline{1}\)1]/(111)[1\(\overline{1}\)0]/(111)[10\(\overline{1}\)] | 60/0/-60 | 54.7 | 45 | {111}〈uvw〉, {hkl}〈110〉 |
B | (112)[1\(\overline{1}\)0] | 0 | 35.3 | 45 | {hkl}〈110〉 |
C | (001)[\(\overline{1}\)\(\overline{1}\)0]/(001)[1\(\overline{1}\)0]/(001)[110] | 90/0/-90 | 0 | 45 | {hkl}〈110〉 |
RG | (110)[1\(\overline{1}\)0] | 0 | 90 | 45 | {hkl}〈110〉 |
Table 1 Ideal orientations in rolling and simple shear deformation of FCC metals (adapted from Ref. [4]).
Miller indicesa | Euler angles [°]a | Relevant fibers | |||
---|---|---|---|---|---|
φ1 | Φ | φ2 | |||
Rolling | |||||
Bs | (110)[1\(\overline{1}\)2]/(110)[1\(\overline{1}\)\(\overline{2}\)] | 54.74/-54.74 | 90 | 45 | β |
S | (213)[\(\overline{3}\)\(\overline{6}\)4] | 58.98 | 36.7 | 63.4 | β |
Cu | (112)[\(\overline{1}\)\(\overline{1}\)1]/(112)[11\(\overline{1}\)] | 90/-90 | 35.3 | 45 | β |
D | (4411)[1\(\overline{1}\)1\(\overline{1}\)8]/(4411)[11118ˉ] | 90/-90 | 27.2 | 45 | β |
Simple shear | |||||
A1* | (111)[\(\overline{1}\)\(\overline{1}\)2]/(111)[2\(\overline{1}\)\(\overline{1}\)] | 90/-30 | 54.7 | 45 | {111}〈uvw〉 |
A2* | (111)[1\(\overline{2}\)1]/(111)[11\(\overline{2}\)] | 30/-90 | 54.7 | 45 | {111}〈uvw〉 |
A/\(\overline{A}\) | (111)[0\(\overline{1}\)1]/(111)[1\(\overline{1}\)0]/(111)[10\(\overline{1}\)] | 60/0/-60 | 54.7 | 45 | {111}〈uvw〉, {hkl}〈110〉 |
B | (112)[1\(\overline{1}\)0] | 0 | 35.3 | 45 | {hkl}〈110〉 |
C | (001)[\(\overline{1}\)\(\overline{1}\)0]/(001)[1\(\overline{1}\)0]/(001)[110] | 90/0/-90 | 0 | 45 | {hkl}〈110〉 |
RG | (110)[1\(\overline{1}\)0] | 0 | 90 | 45 | {hkl}〈110〉 |
Fig. 2. Hardness values for the ARBed Al sheet after different annealing treatments. The dashed line indicates the hardness value of the sheet prior to ARB.
Fig. 3. Optical micrographs taken from mid-thickness region of the (a) ARBed sheet and (b-d) those after subsequent annealing for 30 min at 250, 325, and 400 °C, respectively. Note the scales are different.
Fig. 4. ND-IPF grain maps for center and surface regions of the ARBed sheet during isothermal annealing at 325 °C: (a) as-deformed; (b) 1 min; (c) 2 min; (d) 5 min; (e) 30 min. LAGBs (3-15°) and HAGBs (>15°) are represented by white and black lines, respectively. Note the scales are different.
Fig. 5. ND-IPF grain maps for center and surface regions of the ARBed sheet after annealing for 30 min at (a) 250 °C and (b) 400 °C, respectively. LAGBs (3-15°) and HAGBs (>15°) are represented by white and black lines, respectively. Note the scales are different.
Fig. 6. Variation of statistical microstructure parameters during annealing of the ARBed sheet: (a) circle-equivalent grain diameter; (b) grain aspect ratio; (c) fraction of HAGBs. Grains are defined with a minimum misorientation of 5°.
Fig. 7. ODF sections showing EBSD-measured textures for the center and surface regions of the ARBed sheet after annealing at 325 °C for different periods of time: (a) as-deformed; (b) 1 min; (c) 2 min; (d) 5 min; (e) 30 min.
Fig. 8. ODF sections showing EBSD-measured textures for the center and surface regions of the ARBed sheet after annealing for 30 min at (a) 250 °C and (b) 400 °C, respectively.
Fig. 9. Grain maps and discrete pole figures showing spatial distribution and orientation characteristics, respectively, of recrystallized and non-recrystallized grains in the ARBed sheet annealed for 1 min at 325 °C: (a) surface region; (b) center region. In (b), cube-oriented grains identified within a spread of 15° around the ideal orientation are also shown. LAGBs (3-15°) and HAGBs (>15°) are represented by red and black lines, respectively, in the grain maps.
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