Showing papers in "Tetsu To Hagane-journal of The Iron and Steel Institute of Japan in 1969"
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TL;DR: In this article, the Physical Chemistry of Steelmaking, by F. D. Richardson and G. G. Fohberg, is presented. p. 127 [Interscience Pub.]
Abstract: Steel Inst., 166(1950), p. 169 22) M. G. FROHBERG: Arch. Eisenhuttenw., 32 (1961), p. 1 23) M. TEMKIN: Acta Physicochimica USSR , 20 (1945), p. 411 cf. Molten Salt Chemistry, by Milton BLANDER. p. 127 [Interscience Pub.] 24) G. Ti. Too P and C. S. SAMIS: Trans. Met. Soc. AlN1E, 422 (1962), p. 879 25) F. D. RICHARDSON: The Physical Chemistry of Steelmaking, p. 55 [published by The Technology Press of MIT and John Wiley•\\Sons. Inc.]
TL;DR: Tsuyoshi et al. as mentioned in this paper studied the polarizing characteristics of synthesized carbides by means of potentiostat in order to determine the optimum condition for the electrolytic extraction of carbides from steels.
Abstract: Tsuyoshi MASUMO Synopsis: The polarizing characteristics of synthesized carbides, Fe3C, Cr3C2, Cr23C6, M23C6, M6C, WC, V4C Nb4C3, Mo2C, ZrC, and TiC, were studied by means of potentiostat in order to determine the optimum condition for the electrolytic extraction of carbides from steels. From the results of polarization curves and natural electrode potentials of iron and carbides, some useful informations were obtained as to the electrolyte and the electrolytic potential for extraction. Moreover, the effects of various factors on polarizing characteristics were considered, that is, of pH and temperature of electrolyte, atmosphere, and kind, composition and form of carbides. (Received July 5, 1969
TL;DR: In this paper, the serrated flow, the Liiders bands and flow stress observed in Fe-23%Ni-0.24%C martensite during tensile test were studied at various temperatures between-196 and 220•Ž.
Abstract: Synopsis: The serrated flow, the Liiders bands and flow stress observed in Fe-23%Ni-0.24%C martensite during tensile test were studied at various temperatures between-196 and 220•Ž. The results obtained were as follows: (1) Temperature dependence of flow stress of the Fe-Ni-C martensite was explained in terms of the rearrangement of carbon atoms due to Snoek type or Cottrell type pinning, or of the clustering of carbon atoms or the precipitation of fine carbide particles on dislocations. The strain hardening at the early stage of deformation was remarkable in the martensite. ( 2 ) Serrated flow was found at a certain range of the test temperature. The temperature range varied with the strain rate. For example, the serration appeared between 1 and 170•Ž for the strain rate of 5'6•~ 10-4/ sec. At this temperature range, the increment in 0.2%-flow-stress was observed, but the strain hardening during serrated region was not so much. ( 3 ) The distinct Luders bands were observed during serrated flow. One Liiders band corresponded to one stress drop of the serration. The characteristic of Liiders bands in the martensite differed from that of annealed mild steel. The finer Liiders bands were uniformly distributed in the martensite, the larger total elongation was observed. ( 4 ) From the analysis of the critical condition for the serration, it was found that (a) a certain degree of plastic strain was necessary for the serrated flow to occur and (b) each step of yielding during serrated flow was an independent process of dynamic strain aging and was associated with the occurrence of one Liiders band. (Received Feb. 12, 1969)