搭接工艺对选区激光熔化镍基单晶高温合金DD491晶体取向与微观组织的影响

张振武, 李继康, 许文贺, 沈沐宇, 戚磊一, 郑可盈, 李伟, 魏青松

Effects of Overlapping Process on Grain Orientation and Microstructure of Nickel-Based Single-Crystal Superalloy DD491 Fabricated by Selective Laser Melting

ZHANG Zhenwu, LI Jikang, XU Wenhe, SHEN Muyu, QI Leiyi, ZHENG Keying, LI Wei, WEI Qingsong

图5 多道搭接试样凝固热裂纹、固态裂纹微观形貌的SEM像和元素分布

Fig.5 SEM images of solidification hot cracks (a, b), solid cracks (c, d), and EDS elemental distribution maps of rectangle area in Fig.5d (e) in the multi-track overlapping samples (a) S1, h = 0.09 mm (b) S3, h = 0.12 mm (c) S1, h = 0.15 mm (d) S1, h = 0.06 mm