1. Laboratory of Applied Physics and Mechanics of Advanced Materials, College of Materials Science and Engineering,Taiyuan University of Technology, Taiyuan 030024, Shanxi, China 2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
Serration Behavior in Zr-Cu-Al Glass-forming Systems
1. Laboratory of Applied Physics and Mechanics of Advanced Materials, College of Materials Science and Engineering,Taiyuan University of Technology, Taiyuan 030024, Shanxi, China 2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
ժҪ The metallic glass matrix composites (MGMCs) and bulk metallic glasses (BMGs) were studied by statistical analysis during plastic deformation at the strain rates of 2��10-2, 2��10-3, and 2��10-4 s-1, respectively. No serration events occur in both MGMCs and BMGs during compression tests at the strain rate of 2��10-2 s-1. When deformed at the strain rate of 2��10-3 s-1, the BMG displays a larger plasticity, which is due to the larger serration events followed by a series of small serrations caused by the continuous movement of free volume. The amplitudes and elastic-energy densities increase with increasing the strain rates owing to many serrations in MGMCs. It is deduced that the Young��s modulus decreases from the normalized stress drop and fluctuations are observed on stress-strain curves, which is attributed to a lower coefficient according to the stick-slip model.
Abstract��The metallic glass matrix composites (MGMCs) and bulk metallic glasses (BMGs) were studied by statistical analysis during plastic deformation at the strain rates of 2��10-2, 2��10-3, and 2��10-4 s-1, respectively. No serration events occur in both MGMCs and BMGs during compression tests at the strain rate of 2��10-2 s-1. When deformed at the strain rate of 2��10-3 s-1, the BMG displays a larger plasticity, which is due to the larger serration events followed by a series of small serrations caused by the continuous movement of free volume. The amplitudes and elastic-energy densities increase with increasing the strain rates owing to many serrations in MGMCs. It is deduced that the Young��s modulus decreases from the normalized stress drop and fluctuations are observed on stress-strain curves, which is attributed to a lower coefficient according to the stick-slip model.
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Zhong WANG,Jiao-jiao LI,Li-wei REN,Yong ZHANG,Jun-wei QIAO,Bao-cheng WANG. Serration Behavior in Zr-Cu-Al Glass-forming Systems[J]. �й������ڿ���, 2016, 23(1): 42-47.
Zhong WANG,Jiao-jiao LI,Li-wei REN,Yong ZHANG,Jun-wei QIAO,Bao-cheng WANG. Serration Behavior in Zr-Cu-Al Glass-forming Systems. Chinese Journal of Iron and Steel, 2016, 23(1): 42-47.
2016, Vol. 23 
