논문 해외 국제전문학술지(SCI급) Deformation behavior of Zr–Al–Cu–Ni–Sn metallic glasses
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2006-05
- 저자명 D.H. Bae,a) S.W. Lee, and J.W. Kwon, S. Yi, J.S. Park
- 학술지명 Materials Research Society
- 발행처명 SPRINGER LINK
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 5
홈페이지첨부 파일
논문 초록 (Abstract)
A highly deformable Zr-Al-Cu-Ni-Sn alloy system without any catastrophic failure has been developed and the underling mechanism for exceptional plasticity has been investigated in terms of structural characteristics and atomic movement kinetics. The as-cast Zr61.7Al8Ni13Cu17Sn0.3 bulk metallic glass has many local nanoscale ordering features. They can play a critical role in nucleating abundant shear bands that sufficiently accommodate global plasticity. During deformation at room temperature, the ordered regions do not grow, providing a structural stability, possibly from the sluggish atomic movement kinetics. Thermal activation energy for crystallization of the Zr61.7Al8Ni13Cu17Sn0.3 alloy is estimated as 3.96 eV, which is about 2.8 times higher than that of the Z41.2Ti13.8Cu12.5Ni10Be22.5 alloy [Vitreloy 1 (Vit1)] and the dynamic mass flow rate is around 10 times slower than that of Vit1. A thermomechanical estimation of compressive strain rates under constant stress shows a sluggish atomic movement upon the addition of Sn.