7075厚板铝合金搅拌摩擦焊接头晶间腐蚀行为研究
刘德强1,2,柯黎明1,3(),徐卫平1,邢丽1,毛育青3
Intergranular Corrosion Behavior of Friction-stir Welding Joint for 20 mm Thick Plate of 7075 Al-alloy
Deqiang LIU1,2,Liming KE1,3(),Weiping XU1,Li XING1,Yuqing MAO3

图6. 1#,3#和5#试样沿焊缝厚度方向水平面不同区域微观组织形貌

Fig.6. Microstructures of different zones of 1# (a, d, g), 3# (b, e, h) and 5# (c, f, i) samples along the weld thickness direction: (a) SAZ, (b) top of NZ, (c) bottom of NZ, (d) top of TMAZ, (e) middle of TMAZ, (f) bottom of TMAZ, (g) top of HAZ, (h) middle of HAZ, (i) bottom of HAZ