Microstructures and fatigue properties of electron beam welds with beam oscillation for heavy section TC4-DT alloy

With the development of the manufacturing technology, electron beam welding（EBW） is capable of producing titanium alloy large parts in aero fields. To increase the applications and improve the properties, EBW with beam oscillation was investigated on TC4-DT alloy with50 mm thickness. We detected the...

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Bibliographic Details
Published in:Chinese journal of aeronautics 2014-08, Vol.27 (4), p.1015-1021
Main Authors: Fu, Pengfei, Mao, Zhiyong, Zuo, Congjin, Wang, Yajun, Wang, Chunming
Format: Article
Language:English
Subjects:
Beam oscillation
Beams (radiation)
DT合金
Electron beam welding
Electron beam welding (EBW)
Fatigue
Fatigue (materials)
Homogeneity
Microstructure
Oscillations
Titanium alloy
Welded joints
Welding
射线无损检测
微观结构
振荡
焊缝熔深
电子束焊接
疲劳性能
重型
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Summary:With the development of the manufacturing technology, electron beam welding（EBW） is capable of producing titanium alloy large parts in aero fields. To increase the applications and improve the properties, EBW with beam oscillation was investigated on TC4-DT alloy with50 mm thickness. We detected the welding samples by X-ray NDT, observed the microstructures of the welds, and tested the fatigue properties of the joints. The results showed that EBW with beam oscillation improved the weld morphology as well as welding quality, and the microstructure homogeneity of the welds and HAZ along the weld penetration were also improved. The fatigue properties of the joints with beam oscillation were more excellent than those of conventional EBW, even equal to those of the base metal under high stresses. The influences of the processing and the microstructure on the properties with beam oscillation were discussed.
ISSN:1000-9361
DOI:10.1016/j.cja.2014.03.020