caa a22 4500 467981523 CHVBK 20180323112520.0 cr unu---uuuuu 170328e19900701xx s 000 0 eng 10.1007/BF00700313 doi (NATIONALLICENCE)springer-10.1007/BF00700313 Structure of highly pure iron after γ→α transformation at at high cooling rates [Elektronische Daten] [D. Kamenetskaya, M. Usikov, V. Shiryaev] Conclusions: 1. In highly pure iron (less than (C+N) 5·10−3 apm; O 0.35 apm) analysis by electron microscope did not reveal signs of martensitic transformation at cooling rates up to the maximally attainable one, viz., 570, 000°K/sec. In iron of commercial-grade purity (C, N, and O, 40 apm each) at cooling rates of more than 350,000°C/sec at step IV (at the temperature of transformation 420°C) a structure of the type of stack martensite is found. 2. The temperature steps of γ→α transformation in rapid cooling depend only weakly on the degree of purity of the iron. The speed of transformation at the temperatures of each step is substantially affected by the degree of purity of the iron: the purer it is, the higher is the speed of transformation. This is due to the change of the speeds of stress relaxation and of the movement of the phase boundary in dependence on the degree of purity of the iron: these speeds increase with greater purity of the iron. Plenum Publishing Corporation, 1991 Kamenetskaya D. aut Usikov M. aut Shiryaev V. aut Metal Science and Heat Treatment Kluwer Academic Publishers-Plenum Publishers 32/7(1990-07-01), 476-482 0026-0673 32:7<476 1990 32 11041 https://doi.org/10.1007/BF00700313 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00700313 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kamenetskaya D. aut NATIONALLICENCE 700 1- Usikov M. aut NATIONALLICENCE 700 1- Shiryaev V. aut NATIONALLICENCE 773 0- Metal Science and Heat Treatment Kluwer Academic Publishers-Plenum Publishers 32/7(1990-07-01), 476-482 0026-0673 32:7<476 1990 32 11041 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer