Author/Authors :
Risanti، نويسنده , , D. and Deges، نويسنده , , J. and Falat، نويسنده , , L. and Kobayashi، نويسنده , , S. and Konrad، نويسنده , , J. and Palm، نويسنده , , M. and Pِter، نويسنده , , B. and Schneider، نويسنده , , A. and Stallybrass، نويسنده , , C. and Stein، نويسنده , , F.، نويسنده ,
Abstract :
The brittle-to-ductile transition temperature (BDTT) of binary Fe–Al alloys with between 9.6 and 45 at.% Al was investigated in the as-cast state by four-point bending tests. An increase of the BDTT was observed with increasing aluminium content between 9.6 and 19.8 at.%. Up to 41.3 at.%, the BDTT did not change significantly. A sharp increase of the BDTT occurred between 41.3 and 45 at.% Al. Transgranular cleavage was observed at a composition of 25 at.% Al, mixed-mode fracture between 39.6 and 41.3 at.% Al and intergranular fracture at 45 at.% Al. The results indicate that the increase in BDTT is correlated with the transition from mixed-mode to intergranular fracture.
Keywords :
A. Iron aluminides (based on Fe3Al) , A. Iron aluminides (based on FeAl) , B. Brittleness and ductility , B. Mechanical properties at high temperatures , B. Mechanical properties at ambient temperature , B. Fracture mode
