| New variants of T-x diagram with three allotropes of iron Maria Parfenova1; Vasily Lutsyk1; Vera Vorob'eva1; Anna Barlukova2; 1INSTITUTE OF PHYSICAL MATERIALS SCIENCE SB RAS, Ulan-Ude, Russian Federation; 2DORZHI BANZAROV BURYAT STATE UNIVERSITY, Ulan-Ude, Russian Federation; PAPER: 388/Iron/Regular (Oral) SCHEDULED: 17:10/Tue. 29 Nov. 2022/Arcadia 1 ABSTRACT: In [1] there are 4 variants of T-x diagram with 3 allotropes of the component A: 1) the only peritectic transformation; 2) closed loop of 2-phase region with 2 low-temperature allotropes: 3) peritectic and evtectoid, divided by the eutectic; 4) metatectic and peritectoid, divided by the eutectic. Two additional variants are offered here: 5) metatectic and evtectoid, divided by the eutectic (Fig. 1,a); 4) peritectic and peritectoid, divided by the eutectic (Fig. 1,b). They were elaborated by means of flow diagrams (phase reaction scheme) [2].<br /> <br />Figure 1. T-x diagram with metatectic and eutectoid transformation (a), corresponding flow diagram (c), variant with peritectic and peritectoid transformation (b) and flow diagram (d)<br /> <br />In view of the widely spread use of computerized calculations of phase diagrams, there was an attempt to introduce a strict definition of Scheil reaction scheme (flow diagram) for the ternary systems [3]. As it was suggested that it be adopted for the production of computer-plotted flow diagrams, it’s better to start with the T-x diagrams of binary systems (like Fig. 1,c-d).<br />This work was been performed under the program of fundamental research SB RAS (project 0270-2021-0002). References: 1. V.Ya. Anosov, S.A. Pogodin. Basic principles of phys.-chem. analysis. Publ. House USSR Ac. of Sci. M.-L. 1947. 876p. P. 469. (In Russian)<br />2. R.G. Connell // J. Phase Equil. 1994. V. 15 P. 6-19. <br />3. M. Hillert, B. Sundman // CALPHAD. 1990. V. 14. P. 111-114. |
