Method of formation of shapes in metallic glasses

Baburaj, E. G. ; Prasad, G. E. ; Banerjee, S. (1987) Method of formation of shapes in metallic glasses Key Engineering Materials, 13-15 . pp. 31-34. ISSN 1013-9826

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Structural relaxation of a metallic glass is accompanied by an irreversible volume change. An amorphous alloy ribbon can be given a permanent shape by allowing it to undergo a relaxation process, while being restrained in that particular shape. The minimum time required at different temperatures for forming a desired shape has been estimated. A helical spring of 70 turns and diameter 4 mm has been formed of an amorphous alloy tape of width 0.7 mm and thickness 20 μ m, by isothermally treating the tape under constraint at 643K. From the load-sensitivity of the spring, the shear modulus of the alloy was evaluated.

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