Mechanical properties of “Thick” amorphous metallic wires produced by the Ulitovskii-Taylor method

• Published in: Russian metallurgy Metally Vol. 2010; no. 7; pp. 658 - 662
• Main Authors: Vorkachev, K. G., Mokhirev, I. I., Chueva, T. R., Umnov, P. P., Umnova, N. V., Molokanov, V. V., Zabolotnyi, V. T.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01.07.2010; Springer Nature B.V
• Subjects: Alloy development; Chemistry and Materials Science; Fracture surfaces; Materials Science; Metallic Materials; Metallurgy; Scanning electron microscopy; Strength; Ultimate tensile strength; Veins; Wire; RUSSIAN Metallurgy; Amorphous Alloy; Plastic Characteristic; Shear Band; Ultimate Tensile Strength
• ISSN: 0036-0295; 1555-6255; 1531-8648
• DOI: 10.1134/S003602951007013X

The strength and plastic characteristics of thick ( d = 40–120 μm) amorphous wires made of a model Co-based alloy and fabricated by the Ulitovskii-Taylor method are studied. They are found to have stable strength and plastic characteristics along the length. The plasticity of the thick wires is high, and they can form a full knot and undergo a load of 0.5 ultimate tensile strength in this state. The surface state and fracture surfaces of the amorphous wires are analyzed by scanning electron and optical microscopy. The wires are found to have a smooth lustrous lateral surface almost free of defects and to retain stable geometrical parameters along their length. Zones with different positions and frequencies of shear bands can form on the wire surface depending on the type of deformation action. The fracture surfaces of the thick amorphous wires are specific: a venous zone consists of several large pronounced principal “veins” and a rare network of adjoining secondary veins.