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| Research of Microstructure and Mechanical Properties of EBW Joint for Large Thickness Titanium Alloy |
| GUAN Feng1, NI Jiaqiang1, LIU Guangxin2, HOU Qi1, LIU Yanmei1, ZHAO Hongbo1 |
(1. AVIC Shenyang Aircraft Corporation, Shenyang 110850, China;
2. Representative Office of the PLA of China, AVIC Shenyang Aircraft Corporation, Shenyang 110850, China) |
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Abstract 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.
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2017, 
