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| Microstructure and Mechanical Properties of LFW Joint for TC4-DT Titanium Alloy |
| LIU Ying, ZHANG Chuanchen, ZHANG Tiancang |
( Key Laboratory of Aeronautical Technology for Welding and Joining Technology,
AVIC Manufacturing Technology Institute, Beijing 100024, China ) |
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Abstract The Microstructure, tensile strength, impact property and low-cycle fatigue testing properties were studied for TC4-DT liner friction welded (LFW) joint of the aircraft. Test results show that an excellent properties of weld joint can be obtained after post-weld heat treatment (temperature: 700℃ , longtime: 3h). The room and high tensile strengths of TC4-DT LFW joint can reach more than 97% of TC4-DT base metals, and the impact property of the weld joint is slightly higher than the base metal, the low-cycle fatigue property is close to the TC4-DT base metals.
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2017, 
