Microstructural characterization of FeAl-based alloys with small vanadium additions
- Univ. of New South Wales, Sydney, New South Wales (Australia)
- Monash Univ., Clayton, Victoria (Australia)
The B2-structured compound FeAl is currently receiving attention as a candidate material for use in the aerospace and power generation industries. This compound exhibits good room temperature strength, together with high oxidation and corrosion resistance and low cost. Unfortunately, its room temperature ductility is low and this has inhibited its commercial exploitation. There are a number of reasons for the limited plasticity of this compound. One important source of embrittlement is associated with the high retention of vacancies in the lattice following high temperature annealing. These vacancies significantly harden the lattice and thus reduce the ductility. Recent research has shown that ternary additions which replace iron may reduce this tendency to hardening following heat treatment. However, these alloys themselves are intrinsically harder because the ternary additions provide significant solute hardening and may also form second phases. It is thus important to characterize the microstructures of the ternary alloys, so the effect of the ternary additions on the vacancy hardening and mechanical properties of these alloys may be understood. This paper presents data on the microstructural characterization of FeAl-based alloys to which vanadium additions, up to 5at.% (unless otherwise stated all compositions given will be in atomic percent), have been added.
- OSTI ID:
- 231124
- Journal Information:
- Scripta Metallurgica et Materialia, Vol. 32, Issue 3; Other Information: PBD: 1 Feb 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
Alloy development and processing of FeAl: An overview
The mechanical properties of Fe-36.5Al and its Cr or Ti containing alloys at elevated temperature