核级镍基合金焊接材料失塑裂纹研究现状

余春, 徐济进, 魏啸, 陆皓

Research Status of Ductility-Dip Crack Occurring in Nuclear Nickel-Based Welding Materials

YU Chun, XU Jijin, WEI Xiao, LU Hao

图3 镍基合金焊接凝固组织晶界类型示意图[45]及失塑裂纹(DDC)敏感区域[28]

Fig.3 Schematic illustration of grain boundaries in nickel-based weld metals (a)[45] and susceptible region of ductility-dip crack (DDC) (TL is liquid temperature, TS is solid temperature, TR is recrystallization temperature, and TX represents a certain temperature) (b)[28]