ASYMMETRICAL TRANSFORMATION IN DIFFERENT TYPES OF PURE IRONS ON PROF. H. DANNINGER'S DETAILED OBSERVATION OF SINTERED IRON

The development of extremely coarse α grains in sintered plain iron is compared with that in cast pure iron. This development is related not to any special factor in powder metallurgy, such as invisible neck or pore structures, but is proposed to be related to the principal characteristic of the allotropic transformation in iron with very low interstitials.