Fe-58at%Al alloy is undercooled up to 222 K (0.15TL) with the drop tube technique. It is found that there exists a critical undercooling about 185 K, beyond which a 揹endrite-equiaxed?growth morphology transition occu...Fe-58at%Al alloy is undercooled up to 222 K (0.15TL) with the drop tube technique. It is found that there exists a critical undercooling about 185 K, beyond which a 揹endrite-equiaxed?growth morphology transition occurs in FeAl intermetallic compound. This transition is character-ized by sharp decrease of its grain size. Once the undercool-ing exceeds 215 K, the peritectic transformation is sup-pressed completely and a fibrous structure is formed, which results from the cooperative growth of FeAl and FeAl2 com-pounds.展开更多
文摘Fe-58at%Al alloy is undercooled up to 222 K (0.15TL) with the drop tube technique. It is found that there exists a critical undercooling about 185 K, beyond which a 揹endrite-equiaxed?growth morphology transition occurs in FeAl intermetallic compound. This transition is character-ized by sharp decrease of its grain size. Once the undercool-ing exceeds 215 K, the peritectic transformation is sup-pressed completely and a fibrous structure is formed, which results from the cooperative growth of FeAl and FeAl2 com-pounds.
