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Laser Joining of Ti3Al-Based Alloy to Ni-Based Superalloy using a Titanium Interlayer

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Abstract

Joining Ti3Al-based alloy to Ni-based superalloy is of great interest for applications in the aerospace fields. Direct welding of these two materials was very difficult and the joint usually fractured during laser welding which cannot form an effective welding joint. In this work, a pure titanium interlayer with a thickness of 0.4 mm was used between the base metals. The results indicated that the addition of titanium interlayer has a great effect on the joint performance. No macrocracks were found through the whole joint. The average room-temperature tensile strength of the joint with titanium was 177 MPa which still much lower than the two base metals. The weak link of the dissimilar joint was the Ti3Al/weld interface. The presence of Ti2Ni, α2-Ti3Al and AlNi2Ti brittle intermetallic compounds in the Ti3Al/weld interface deteriorated the joint properties.

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Authors and Affiliations

  1. Key Laboratory of Automobile Materials, Ministry of Education, and Department of Materials Science and Engineering, Jilin University, No.5988 Renmin Street, Changchun, 130025, China

    Xiao-Long Cai, Da-Qian Sun, Hong-Mei Li, Hong-Ling Guo, Yan Zhang & Ying-ying Che

  2. State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, No.5625 Renmin Street, Changchun, 130022, China

    Xiao-Long Cai

  3. CRRC Changchun Railway Vehicles Co.,Ltd, No.435 Qingyin Road, Changchun, 130062, China

    Hong-Ling Guo

Authors
  1. Xiao-Long Cai
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  2. Da-Qian Sun
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  3. Hong-Mei Li
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Correspondence to Hong-Mei Li.

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Cai, XL., Sun, DQ., Li, HM. et al. Laser Joining of Ti3Al-Based Alloy to Ni-Based Superalloy using a Titanium Interlayer. Int. J. Precis. Eng. Manuf. 19, 1163–1169 (2018). https://doi.org/10.1007/s12541-018-0137-5

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  • DOI: https://doi.org/10.1007/s12541-018-0137-5

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