Mn偏析对0.3C-11Mn-2.7Al-1.8Si-Fe中锰钢力学性能的影响及作用机制

蔡星周, 刘胜杰, 张禹森, 李小龙, 张宇鹤, 张文彬, 陈雷, 金淼

Effect of Mn Segregation on Mechanical Properties of 0.3C-11Mn-2.7Al-1.8Si-Fe Medium Mn Steel and Its Mechanism

CAI Xingzhou, LIU Shengjie, ZHANG Yusen, LI Xiaolong, ZHANG Yuhe, ZHANG Wenbin, CHEN Lei, JIN Miao

图7 S1和S2样品不同应变下形变亚结构的TEM像和选区电子衍射(SAED)花样

Fig.7 TEM images and corresponding selected area electron diffraction (SAED) patterns (Insets) of deformed substructures of S1 (a-f) and S2 (g-i) samples with different strains (ε) (a) as-annealed microstructure in the coarse-grained region of S1 sample (b) dislocation in the coarse-grained region of S1 sample with ε = 20% (c1, c2) bright (c1) and dark (c2) field images for α' martensite in the coarse-grained region of S1 sample with ε = 40% (d) as-annealed microstructure in the fine-grained region of S1 sample (e) α′ martensite nucleated at the intersection of twins in the fine-grained region of S1 sample with ε = 20% (f1, f2) bright (f1) and dark (f2) field images for α' martensite in the fine-grained region of S1 sample with ε = 40% (g) as-annealed microstructure in the S2 sample (h) α′ martensite nucleated at the intersection of twins in the austenite of S2 sample with ε = 20% (i1, i2) bright (i1) and dark (i2) field images for α' martensite in austenite of S1 sample with ε = 60%