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Thermal Vacancy Hardening in Fe100-xAlx (28<x<40)

Helena Skoglund (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Maria Knutson Wedel (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Birger Karlsson (Institutionen för material- och tillverkningsteknik, Materialteknologi)
Intermetallics Vol. 15 (2007), 8, p. 1127-1131.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Iron aluminides;Mechanical properties at high temperatures;Point defects



Denna post skapades 2007-08-15. Senast ändrad 2016-08-15.
CPL Pubid: 45035