GUAN Feng1, NI Jiaqiang1, LIU Guangxin2, HOU Qi1, LIU Yanmei1, ZHAO Hongbo1. Research of Microstructure and Mechanical Properties of EBW Joint for Large Thickness Titanium Alloy. Aeronautical Manufacturing Technology, 2017, 60(3): 74-80.
GUAN Feng1, NI Jiaqiang1, LIU Guangxin2, HOU Qi1, LIU Yanmei1, ZHAO Hongbo1. Research of Microstructure and Mechanical Properties of EBW Joint for Large Thickness Titanium Alloy. Aeronautical Manufacturing Technology, 2017, 60(3): 74-80. DOI: 10.16080/j.issn1671-833x.2017.03.074.
Electron beam welding(EBW) of a 60mm thick TC4-DT titanium alloy is carried out. The properties of EBW joint for the titanium alloy are researched by means of the microstructure
tension testing
impact testing and fracture toughness testing. The results indicate that the welding performance of TC4-DT titanium alloy is excellent. The EBW joint of TC4-DT titanium alloy is composed by the basketweave structure α
compared with the matrix
the EBW joints of TC4- DT titanium alloy has similar tension strength. The impact toughness of the EBW joints is less than that of the forgings. The fracture toughness performance of the EBW joints is excellent
but the fatigue crack propagation of the EBW joints is 20% less than that of the forgings.