Aluminium - Chromium - Titanium

Natalia Bochvar, Tatiana Dobatkina, Ol'ga Fabrichnaya, Volodymyr Ivanchenko, Damian M. Cupid

Introduction

Aluminum and chromium are well known alloying elements used in titanium industry to produce Ti-based alloys [1956Zwi, 1974Zwi, 1990Lam]. Titanium aluminides based on α₂ (Ti₃Al), γ (TiAl) and TiAl₃ are currently being considered as candidate materials for elevated temperature applications as a result of their low density, good corrosion resistance, modulus and attractive high temperature properties [1989Kim, 1991Dur, 1991Moh, 1994Gao, 1995Whi, 1996Liu, 2000Wel, 2000Yan, 2003Zha, 2004Wan, 2005App]. However, these alloys are brittle at temperatures lower than 400 K [2005App]. Alloying with Cr raises their plasticity and resistance to high temperature oxidation [1991Par...