Reference

Rapid heating of iron-silicon-boron metallic glasses

Rapid heating of iron-silicon-boron metallic glasses. Zaluska, Alicja; Matyja, Henryk (Inst. Mater. Sci. Eng., Warsaw Tech. Univ., Warsaw 02-524, Pol.). J. Mater. Sci. Lett., 2(12), 729-32 (English) 1983. CODEN: JMSLD5. ISSN: 0261-8028. DOCUMENT TYPE: Journal CA Section: 55 (Ferrous Metals and Alloys) Metallic glasses Fe75Si15B10 [64068-92-4] and Fe75Si12B13 [86754-92-9] were heated to a temp. below the m.p. at 107 K/s and cooled in oil at 6-8 ′ 104 K/s or air-cooled. All oil-cooled samples remained amorphous, but air-cooling led to crystn. The crystn. products were Fe3Si [12023-54-0] and Fe2B [12006-85-8]. The Curie temp. did not change, and no compositional short-range ordering was obsd. in the amorphous structures. Relaxation effects were noted at higher heating temps. and lower cooling rates. In the crystd. samples, regardless of heating rate, no differences in grain size and morphol. of phases were found.

Tubes of antiphase boundaries in bcc

Tubes of antiphase boundaries in bcc. lattice-based superstructures: experimental observation and possible contribution to strain hardening. Glezer, A. M. (Inst. Pretsizn. Splavov, Moscow, USSR). Fiz. Met. Metalloved., 58(4), 786-94 (Russian) 1984. CODEN: FMMTAK. ISSN: 0015-3230. DOCUMENT TYPE: Journal CA Section: 55 (Ferrous Metals and Alloys) The formation and topolog. of the diffraction contrasts from antiphase boundary tubes in Fe-based DO3-type superstructures (Fe3Si [12023-54-0], Fe3Ga [12063-30-8], and Fe3Al [12003-42-8]) was studied by SEM. The tubes with the shear vector a <100> were formed in the linear stage of superstructure deformation hardening. The vol. d. of the tubes increased by a parabolic low with plastic deformation degree. The width of the tubes did not coincide with the equil. width of superdislocations and was 2.5-3 nm in Fe3Si and 4-4.5 nm in Fe3Al. A significant contibution to the deformation hardening coeff. was obtained from the resoln. of the tubes.