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所属单位：材料科学与技术学院
发表刊物：MATERIALS RESEARCH EXPRESS
关键字：2219 aluminum alloy LBDPW grain size FE model CA model
摘要：Laser beam deep penetration welding (LBDPW) was performed to connect the 2219 aluminum alloy butt joint with different parameters. Then, the LBDPW process of 2219 aluminum alloy was modeled using a coupled FE-CA model, i.e., finite element couple with cellular automaton, which contained FE model that simulates temperature field and CA model that calculates microstructure evolution. Furthermore, the microstructure evolution in LBDPW of 2219 aluminum alloy was characterized under optical microscopy and a scanning electron microscopy (SEM). At the same time, the association between LBDPW processing thermal cycles and macrostructure/microstructure evolution is studied. The results show that the final microstructure of the welded joint included fine equiaxed grains in the equiaxed grains zone (EQZ), columnar in the fusion zone (FZ) and coarse equiaxed grains in the weld seam center zone. Moreover, it was indicated that the size of grains is associated with the temperature gradient of the welding process. Besides, the size of EQZ became narrow and uniform because of the undercooling increase, leading to the rise in the heat input.
ISSN号：2053-1591
是否译文：否
发表时间：2019-11-01
合写作者：Kang, Yue,Qi, Chaoqi,Shi, Litao,Wang, Qixiao
通讯作者：占小红