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Glassy steel optimized for glass-forming ability and toughness
9.W. L. Johnson, M. D. Demetriou, J. S. Harmon, M. L. Lind, and K. Samwer, MRS Bull. 32, 644 (2007).
18.Alloy ingots were prepared by induction melting mixtures of the appropriate amounts of Fe (99.95%), Mo (99.95%), Ni (99.995%), Cr (99.99%), B crystal (99.5%), graphite powder (99.9995%), and P (99.9999%) in quartz tubes sealed under argon atmosphere. A -thick foil was prepared using an Edmund Buhler D-7400 splat quencher. All other alloys were formed into cylindrical rods by remelting the ingots in quartz tubes of 0.5-mm-thick walls under argon atmosphere and rapidly water quenching. X-ray diffraction with radiation was performed to verify the amorphous nature of the foils and rods.
19.The specimen rods were notched using a wire saw with a root radius of to a depth of approximately half the rod diameter. The notched specimens were placed on a 3-pt bending fixture with span distance of 12.7 mm. The critical fracture load was measured by applying a monotonically increasing load at constant cross-head speed of 0.1 mm/min. At least three tests were performed for each alloy.
20.Y. Murakami, Stress Intensity Factors Handbook (Pergamon, Oxford, United Kingdom, 1987), Vol. 2, p. 666.
26.The molar volumes of the alloys developed by Poon and co-workers (Refs. 2, 3, 5, and 24) were estimated using , where , , and are the atomic fraction, atomic weight, and density of element , respectively. For elements P, C, and B, is estimated using the metallic radius.
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