The Effect of Microstructural Changes Induced by Annealing on Mechanical Properties of FeCoCrMoCBY Bulk Glassy Alloy

Abstract:

Bulk metallic glasses have interesting mechanical properties, such as high strength up to 5 GPa, high elastic strain and many other additional desirable properties. However, BMGs beyond the elastic region fail catastrophically on one dominant shear band and show little macroscopic plasticity in an apparently brittle manner. Nano-crystallized BMGs have been found to possess better ductility comparing with brittle parent BMGs. Annealing treatment of glassy alloys is a useful method to prepare bulk nano-crystalline alloys. In the present study, the crystallization trend of the FeCoCrMoCBY alloy which is claimed to have the best glass forming ability was studied in various times in temperature ranges of a) between Tg (glassy temp.) and Tx1 (first crystallization temp.), and b) between Tx1 and Tx2 (second crystallization temp.). The influences of different annealing time and temperatures on the microstructure and microhardness of Fe₄₁Co₇Cr₁₅Mo₁₄Y₂C₁₅B₆ BMG are reported in this paper.

• Periodical: Advanced Materials Research (Volumes 488-489)
• Pages: 861-865
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.488-489.861
• Online since: March 2012
• Authors: Amir Seifoddini, Mahmoud Nili Ahmadabadi, Saeed Heshmati-Manesh, Mihai Stoica, Uta Kuehn, Jürgen Eckert
• Keywords: Annealing, Mechanical Property, Metallic Glass, Nanocrystal

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