발간논문

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Vol.45, No.4, 203 ~ 209, 2007
Title
Plasticity Enhancement of Bulk Amorphous Alloys Via Equal Channel Angular Pressing
이재철 Jae Chul Lee , 신승용 Seung Yong Shin , 김낙준 Nack J. Kim , 이창면 Chang Myeon Lee
Abstract
This study investigated the effect of excess free volume generated by the application of elastic shear stress on the mechanical properties of bulk amorphous alloys. A shear deforming device that can create excess free volume without fracturing samples was designed. With repeated elastic stress, the plasticity of shear-deformed amorphous alloys increased, while the yield strength decreased. These behaviors were analyzed from the perspective of the microsturctural changes characterized by the free volume generation, and quantified using the effective activation energy for crystallization.
Key Words
bulk amorphous alloy, plasticity, shear stress, free volume, ECAP
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