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刘齐,张萌,付乐琪,杨振文,王颖,王东坡.原位合金化双丝电弧增材制造γ-TiAl组织性能研究[J].稀有金属材料与工程(英文),2020,49(11):3919~3924.[Liu Qi,Zhang Meng,Fu Leqi,Yang Zhenwen,Wang Ying and Wang Dongpo.Microstructure and properties of γ-TiAl fabricated by in-situ alloying assisted double-wire arc additive manufacturing[J].Rare Metal Materials and Engineering,2020,49(11):3919~3924.]
Microstructure and properties of γ-TiAl fabricated by in-situ alloying assisted double-wire arc additive manufacturing
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Received:November 27, 2019  Revised:March 17, 2020
DOI:
Key words: in-situ alloying  double-wire arc additive manufacturing  microstructure  mechanical property  oxidation resistance
Foundation item:国家自然科学基金(51574177)
Author NameAffiliation
Liu Qi,Zhang Meng,Fu Leqi,Yang Zhenwen,Wang Ying and Wang Dongpo  
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Abstract:
      Ti-48Al and Ti-48Al-2Cr-2Nb alloys were fabricated by in-situ alloying assisted double-wire arc additive manufacturing. The microstructure and properties of the two alloys were characterized by XRD, OM, SEM, micro mechanical tensile test and high temperature oxidation test. The results showed that both of these two deposited alloys showed quite uniform components and composed of γ-TiAl and α2-Ti3Al. The addition of tracing Cr and Nb showed no significant effect on microstructure. Micro tensile testing showed that ultimate strength elevated after the addition of Cr and Nb yet no significant effect to plasticity. High temperature oxidation resistance test confirmed that Ti-48Al-2Cr-2Nb has a good resistance to oxidation compared to Ti-48Al. The final weight gain of the sample decreased from 5.26mg /cm2 to 1.95mg /cm2.