Diffusion Bonding of TiAl to Ti6Al4V Using Nanolayers

• Type: Article in International Scientific Journal
• Date: 2018

Authors

Sónia Simões (Author) FEUP; Filomena Viana (Author) FEUP; A. Sofia Ramos (Author) Other; M. Teresa Vieira (Author) Other; Manuel F. Vieira (Author) FEUP

Journal

Title: Journal of Materials Engineering and Performance

Vol. 27 No. 10

Pages: 5064-5068

ISSN: 1059-9495

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 6 Citations

Scopus - 7 Citations

INSPEC

Other information

Authenticus ID: P-00N-V63

DOI: 10.1007/s11665-018-3207-z

Abstract (EN): 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 degrees C under pressures from 5 to 40MPa and dwell times between 60 and 180min. 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 degrees C during 60min using a pressure of 20MPa. The bond interface is thin (less than 10 mu m) and is mainly composed of NiAl grains. Thin layers of Al-Ni-Ti intermetallic compounds were formed adjacent to the base materials.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5