The influence of silver on the structure and mechanical properties of (TiAl)-ba...

• Author(s): Vieira, M. T. ; Trindade, B. ; Ramos, A. S. ; Fernandes, J. V. ; Vieira, M. F.
• Date: 1999
• Persistent ID: http://hdl.handle.net/10316/4320
• Origin: Estudo Geral - Universidade de Coimbra
• Subject(s): Sputtering; Titanium aluminides; Phase transitions; Mechanical properties
• Document Type: Article
• Language: English

Description

The influence of silver on the structure and mechanical properties of sputter-deposited Ti-Al-Ag films with an aluminium content close to 48 at.% and 0 < at.% Ag < 3 was investigated. A new tensile test procedure has been developed to evaluate the ductility of the films. The results show that the as-deposited films are metastable formed, essentially, by an extended [alpha]-Ti solid solution. Annealing at 600°PC gives rise to the formation of [gamma]-TiAl intermetallic compound. Silver does not lead to structural modifications of the TiAl system nor influences significantly its ductility. However, a hardness increase of the as-deposited films with silver contents up to 1.6 at.% is observed. http://www.sciencedirect.com/science/article/B6TW0-3Y6PSMH-1Y/1/e535c2b73419a8f452f113c18d3a9e6e