The influence of the processing temperature on the microstructure of gamma-TiAl joints brazed with a Ti-15Cu-15Ni alloy

• Type: Article in International Scientific Journal
• Date: 2003

Authors

A. Guedes (Author) Other; A. M. P. Pinto (Author) Other; Manuel Vieira (Author) FEUP; Filomena Viana (Author) FEUP

Journal

The Journal is awaiting validation by the Administrative Services.

Title: THERMEC'2003, PTS 1-5

Vol. 426-4

Pages: 4159-4164

Indexing

ISI Web of Knowledge - 4 Citations

Scopus - 4 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: P-000-KPH

DOI: 10.4028/www.scientific.net/MSF.426-432.4159

Abstract (EN): The joining of Ti-47Al-2Cr-2Nb (at.%) by diffusion brazing at 1000, 1050 and 1100degreesC for 10 min, using a Ti-15Cu-15Ni (wt.%) braze alloy was investigated. The microstructure and the chemical composition of the interfaces were studied by scanning electron microscopy (SEM) and by energy dispersive X-ray scans (EDS), respectively. The reaction between the gamma-TiAl alloy and the braze alloy led to the formation of layered interfaces, which should be essentially composed of alpha(2)-Ti3Al and of Ti-Ni-Cu-Al and Ti-Ni-Cu intermetallic compounds. Raising the brazing temperature increases the amount of Al rich intermetallic compounds (Ti-Ni-Cu-Al) and the extension of the interface. The increase of the thickness of the interface is primarily due to the growth of the reaction layer formed near the gamma-TiAl alloy.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6