Table 3.

Long range internal stresses of ECAP AA1050 after 8 passes for 7 low dislocation density volumes within the grains/subgrains along the principal stress directions. “G” refers to different grain interiors. (σ_a = 200 MPa for the 8 pass sample [21])

ECAP AA1050 8 Pass
Principal Stresses	G1	G2	G3	G4	G5	G6	G7
σ1 (MPa) (max)	−25 ± 14	−11 ± 15	23 ± 17	4 ± 12	68 ± 19	130 ± 22	0 ± 17
σ2 (MPa)	−44 ± 15	−17 ± 17	1 ± 21	−16 ± 16	56 ± 19	79 ± 15	−10 ± 20
σ3 (MPa) (min)	−56 ± 18	−27 ± 18	−27 ± 16	−28 ± 17	22 ± 18	32 ± 16	−56 ± 23
σ1/σa	−0.12 ± 0.07	−0.06 ± 0.08	0.12 ± 0.09	0.02 ± 0.06	0.34 ± 0.10	0.65 ± 0.11	0.00 ± 0.09
σ2/σa	−0.22 ± 0.08	−0.09 ± 0.09	0.00 ± 0.10	−0.08 ± 0.08	0.28 ± 0.10	0.39 ± 0.08	−0.05 ± 0.10
σ3/σa	−0.28 ± 0.09	−0.14 ± 0.09	−0.14 ± 0.08	−0.14 ± 0.09	0.11 ± 0.09	0.16 ± 0.08	−0.28 ± 0.11