Thermal Vacancy Hardening in Fe100-xAlx (28<x<40)
Journal article, 2007

The ambient temperature microhardness of FeAl containing 28 40 at% Al have been systematically measured after quenching from a range of annealing temperatures between 500°C and 1000°C. The hardness for each annealing temperature has a minimum located between 30 and 35 at% Al, and the hardness is independent of annealing temperature at 32 at% Al. The thermal vacancy hardening is dependent on Al-concentration and is documented by the hardness difference between the 500°C annealed state and materials annealed at higher temperatures. Furthermore, our conclusions indicate that vacancy hardening might not be the single hardening mechanism responsible for the anomalous stress peak in all FeAl alloys.

Mechanical properties at high temperatures

Point defects

Iron aluminides

Author

HELENA SKOGLUND

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Maria Knutson Wedel

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Birger Karlsson

Chalmers, Materials and Manufacturing Technology, Materials Technology

Intermetallics

Vol. 15 8 1127-1131

Subject Categories

Other Materials Engineering

More information

Created

10/8/2017