Journal
MATERIALS
Volume 15, Issue 18, Pages -Publisher
MDPI
DOI: 10.3390/ma15186362
Keywords
metallic glass micropillar; size dependence; yield strength; failure mechanism; shear band
Categories
Funding
- National Natural Science Foundation of China [11972278, 11790293]
Ask authors/readers for more resources
Recent research has shown that the deformation behavior of metallic glasses is influenced by sample size, resulting in an anomalous inverse size effect. The proposed theoretical analysis based on the shear banding process explains the inherent size dependence of yield strength in metallic glasses.
The sample size effect on the deformation behavior of metallic glasses (MGs) has recently become research of intense interest. An inverse sample size effect is observed in previous experimental studies; where the yield strength decreases with decreasing sample size, rather than increasing. We propose a theoretical analysis based on the shear banding process to rationalize the inherent size dependence of yield strength, showing an excellent agreement with experimental results. Our model reveals that the anomalous inverse size effect is, in fact, caused by a transition in failure mode; from a rapid shear banding process with a shear band (SB) traversing the entire sample in bulk MGs, to an immature shear banding process with propagated SBs only at the surface in micron-sized MGs. Our results fill the gap in the current understanding of size effects in the strength and failure mechanism of MGs at different length scales.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available