398
Views
28
CrossRef citations to date
0
Altmetric
Original Articles

Size effects on the compressive deformation behaviour of a brittle Fe-based bulk metallic glass

, , , &
Pages 403-412 | Received 20 May 2009, Accepted 15 Feb 2010, Published online: 12 Apr 2010
 

Abstract

The mechanical behaviour of brittle Fe-based bulk metallic glass (BMG) samples with different diameters and aspect ratios (ARs) has been investigated. For samples with an AR of 2, the fracture strength increases with a decrease in the sample diameter which can be well-explained by the Weibull analysis with a Weibull modulus of 34. For samples with a fixed diameter of 2 mm, a transition between three deformation modes, i.e. fragmentation, distensile cracking and confined shearing was observed as the AR was decreased. When the AR is below 0.19, large friction between the platen and specimen end suppresses the distensile cracking and prompts shear deformation, resulting in multiple shear bands and large compressive plasticity. Our analysis indicates that the deformation mode of brittle BMGs strongly depends on the applied stress conditions and can exhibit ductile characteristics under constraints. The present findings are important for engineering applications of brittle BMGs in which various geometries will be used.

Acknowledgements

The financial support from National Natural Science Foundation of China (Grant Nos. 50725104, 50841023), the 973 programme with a contract number of 2007CB613903, China Postdoctoral Science Foundation (20080430019) and the Program of Introducing Talents of Discipline to Universities (Project No. B07003) is gratefully acknowledged.

Log in via your institution

Log in to Taylor & Francis Online

PDF download + Online access
  • 48 hours access to article PDF & online version
  • Article PDF can be downloaded
  • Article PDF can be printed
USD 61.00 Add to cart
* Local tax will be added as applicable

Related Research

People also read lists articles that other readers of this article have read.

Recommended articles lists articles that we recommend and is powered by our AI driven recommendation engine.

Cited by lists all citing articles based on Crossref citations.
Articles with the Crossref icon will open in a new tab.