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Literature Abstracts

 1484.    HONDA, K., AND NISHIYAMA, Z.  Nature of the Tetragonal and Cubic Martensites.  Trans. Am. Soc. Steel Treating, vol. 20, 1932, pp. 464-470; Sci. Repts. Tôhoku Imp. Univ., vol. 21, 1932, pp. 299-331; Chem. Abs., vol. 27, 1933, p. 253.

       X-ray analyses show martensite to be a solid solution of C in FE, divided into 2 distinct kinds, a is quenched steel and β in quenched and tempered steels β-Martensite is a solid solution, the C atoms being present within the space lattice of Fe.  It is very probable that in a-martensite each of the C atom occupies 1 of the face centers of the tetragonal lattice and in β-martensite a position (½, ¼, 0) of the cubic lattice.  The mechanism for the transition is austenite→a-martensite→β-martensite.