16 b1 84062 b2 84062 Cross-sectional bright field TEM images for the microstructure morphology and statistic grain size distributions for diff erent b3 deformed Cu samples with a strain e=2.0:(al,b1)RT-QSC2 (InZ 8 =25)； (a2 and b2)RT-DPD(InZ =33); (a3 and b3)DIT-DPD (InZ =43); 8 and (a4 and b4)LNT-DPD b4 (nZ=66). 12 0 100200 300 400 500 600 Transverse grain size (nm)
Cross-sectional bright fieldTEM images for the microstructure morphology and statistic grain size distributions for diff erent deformed Cu samples with a strain e = 2.0: (a1, b1) RT-QSC2 (lnZ = 25); (a2 and b2) RT-DPD (lnZ = 33); (a3 and b3) DIT-DPD (lnZ = 43); and (a4 and b4) LNT-DPD (lnZ = 66)
1800 ■ e=2.0 a 1600 ⊙ e=1.0 (edw) 1400 1200 1000 800 e=2.0 b L n Z--d? 700 Present work ECAP Cu [6] ◆ 600 Rolling Cu [12] Drawing Cu[4] e=1.0 500 Present work △ ECAP Cu [6] 400 300 20 15 10 E =2.0 丰十 5 ■ Present work ECAP Cu [6] =1.0 Present work △ ECAP Cu [6] 10 20 30 40 50 60 70 80 InZ
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