Article ID Journal Published Year Pages File Type
1579555 Materials Science and Engineering: A 2010 6 Pages PDF
Abstract

Cu46Zr47Al7 bulk metallic glass (BMG) alloys with different microstructure were fabricated by adjusting the casting size. For the monolithic BMG with different diameters, the measured plasticity decreased with the increase of sample size and was mainly due to the sliding of two undeveloped parts along main shear band. Excellent compression plastic strain (∼13.2%) was obtained for the marginal BMG containing in situ nanocrystals with sample size up to 3.5 mm in diameter where multiple shear bands formed. It is suggested that failure of BMG samples will occur when the temperature rise in shear layer reaches a critical value. The temperature rise is closely related to the sample size and stress drop, moreover, it can be controlled through adjusting final stress drop (via sample size) and increment rate of stress drop (via microstructure), resulting in enhanced plasticity.

Related Topics
Physical Sciences and Engineering Materials Science Materials Science (General)
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