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Diffusion Bonding of TiAl to Ti6Al4V Using Nanolayers

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Abstract

Microstructural characterization of TiAl to Ti6Al4V dissimilar diffusion bonds assisted by reactive Ni/Al nanolayers was performed in this study. The nanolayers (alternated Al and Ni) were deposited onto the base material surfaces. Diffusion bonding was performed at 700 and 800 °C under pressures from 5 to 40 MPa and dwell times between 60 and 180 min. Microstructural characterization was performed using high-resolution transmission and scanning electron microscopies. The observations revealed that dissimilar TiAl to Ti6Al4V joints assisted by Ni/Al reactive nanolayers can be obtained successfully at 800 °C during 60 min using a pressure of 20 MPa. The bond interface is thin (less than 10 µm) and is mainly composed of NiAl grains. Thin layers of Al-Ni-Ti intermetallic compounds were formed adjacent to the base materials.

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Acknowledgments

This research is sponsored by FEDER funds through the program COMPETE—Programa Operacional Factores de Competitividade—and by national funds through FCT—Fundação para a Ciência e a Tecnologia—, under the project UID/EMS/00285/2013. The authors are grateful to CEMUP—Centro de Materiais da Universidade do Porto for expert assistance with SEM.

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Authors and Affiliations

  1. CEMMPRE, Department of Metallurgical and Materials Engineering, University of Porto, R. Dr. Roberto Frias, 4200-465, Porto, Portugal

    Sónia Simões, Filomena Viana & Manuel F. Vieira

  2. INEGI - Institute of Science and Innovation in Mechanical and Industrial Engineering, R. Dr. Roberto Frias, 4200-465, Porto, Portugal

    Sónia Simões, Filomena Viana & Manuel F. Vieira

  3. CEMMPRE, Department of Mechanical Engineering, University of Coimbra, R. Luís Reis Santos, 3030-788, Coimbra, Portugal

    A. Sofia Ramos & M. Teresa Vieira

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  1. Sónia Simões
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  2. Filomena Viana
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  3. A. Sofia Ramos
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  4. M. Teresa Vieira
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  5. Manuel F. Vieira
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Correspondence to Sónia Simões.

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Simões, S., Viana, F., Ramos, A.S. et al. Diffusion Bonding of TiAl to Ti6Al4V Using Nanolayers. J. of Materi Eng and Perform 27, 5064–5068 (2018). https://doi.org/10.1007/s11665-018-3207-z

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  • DOI: https://doi.org/10.1007/s11665-018-3207-z

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