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WANG Lin, HUA Xueming, SHEN Chen, ZHANG Yuelong, LI Fang, ZHOU Wenlu, DING Yuhan. Investigation on microstructure characteristics of Ti-48Al alloy fabricated using twin-wire directed energy deposition-plasma arc[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2024, 45(2): 1-6. DOI: 10.12073/j.hjxb.20230309001
Citation: WANG Lin, HUA Xueming, SHEN Chen, ZHANG Yuelong, LI Fang, ZHOU Wenlu, DING Yuhan. Investigation on microstructure characteristics of Ti-48Al alloy fabricated using twin-wire directed energy deposition-plasma arc[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2024, 45(2): 1-6. DOI: 10.12073/j.hjxb.20230309001

Investigation on microstructure characteristics of Ti-48Al alloy fabricated using twin-wire directed energy deposition-plasma arc

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  • Received Date: March 08, 2023
  • Available Online: November 20, 2023
  • Ti-48Al alloy is fabricated successfully using plasma arc powred twin wire-directed energy deposition-arc, and its microstructure characteristic before and after heat treatment is systematically investigated. The results show that as-deposited Ti-48Al alloy consists of α2 and γ phase. The microstructure is characterized by the alternatively distributed dendritic grain and fully lamellar colony along the building direction for as-deposited Ti-48Al alloy, and there is interdendritic Al element segregation in the dendritic grain region. After heat treatment in 1340 ℃/10 h/furnace cooling, the duplex microstructure with fine grain size is obtained, and the microstructure heterogeneity is significantly improved, the α2 phase content is obviously increased, the preferred orientation of microstructure is also weakened.

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