Effect of beam oscillation on microstructure, mechanical properties and corrosion behaviour of electron beam butt weld of zircaloy-4 was investigated. Joints made with beam oscillation demonstrated higher ductility, toughness and notch tensile strength and higher corrosion resistance than the joints prepared without beam oscillation. Heat mixing and faster cooling associated with beam oscillation restrict unidirectional crystal growth favouring the development of a more uniform, fine basketweave widmanstätten structure in the fusion zone. Improvement in mechanical and corrosion properties using beam oscillation was attributed to the development of a more uniform microstructure, lesser segregation and lesser intermetallic precipitation in the fusion zone.

研究了电子束振荡对锆合金4电子束对接焊缝显微组织、力学性能和腐蚀行为的影响。与没有横梁振动的接头相比，用横梁振动制成的接头表现出更高的延展性、韧性和缺口拉伸强度以及更高的耐腐蚀性。与光束振荡相关的热混合和更快的冷却限制了单向晶体生长，有利于在融合区形成更均匀、更精细的篮织 widmanstätten 结构。使用梁振荡改善机械和腐蚀性能归因于更均匀的微观结构的发展，更少的偏析和更少的金属间化合物沉淀在熔合区。