Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/10551
Title: Improved plasticity and fracture toughness in metallic glasses via surface crystallization
Authors: Fan, J
Chen, A
Wang, J
Shen, J
Lu, J
Keywords: A. Composite, based on the metallic glass matrix intermetallics, miscellaneous
B. Deformation map
B. Fracture toughness
B. Glasses, metallic
B. Mechanical properties at ambient temperature
Issue Date: 2011
Publisher: Elsevier
Source: Intermetallics, 2011, v. 19, no. 10, p. 1420-1427 How to cite?
Journal: Intermetallics 
Abstract: Mechanical crystallization was induced in the monolithic bulk metallic glasses by surface mechanical attrition treatment (SMAT) to create the isolated crystallite islands in the top surface layer. Inside the isolated crystallite islands, microstructure consists of the crystallites with a gradient grain size evolution and the residual amorphous phase. Moreover, isolated crystallite islands, acting as the obstacles to restrict the highly localized deformation of shear bands/cracks, effectively limit the shear bands extension, suppress the shear bands opening, and avoid the cracks developing, which significantly enhance the overall plasticity and fracture toughness. They were suggested by the secondary shear bands in the glassy matrix and fine-shearing together with micro-cracking inside the isolated crystallite islands. Finally, the improved plasticity and fracture toughness were systematically discussed. Based on the current results, surface crystallization is proposed to optimize the mechanical properties of metallic glasses.
URI: http://hdl.handle.net/10397/10551
ISSN: 0966-9795
EISSN: 1879-0216
DOI: 10.1016/j.intermet.2011.05.012
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