Crystallisation behaviour during tensile loading of laser treated Fe–Si–B metallic glass

Abstract

Effect of tensile loading on crystallisation behaviour of as-cast and laser thermal treated Fe–Si–B metallic glass foils was investigated. Tensile loading lacked any marked influence on the crystallisation behaviour of as-cast and structurally relaxed laser-treated metallic glass foils. Furthermore, the average crystallite/grain size in partially crystallised laser-treated metallic glass foil was nearly equal to the average crystallite/grain size in the region away from the fracture of the same partially crystallised laser-treated metallic glass foil after tensile loading. However, a significant crystallite/grain growth/coarsening of the order of two and half times was observed in the fractured region compared to the region around it for the laser-treated partially crystallised metallic glass foils. The simultaneous effects of stress generation and temperature rise during tensile loading were considered to play a key role in crystallite/grain growth/coarsening.

Keywords:

• Crystallisation
• laser processing
• metallic glass
• stress-assisted growth

Acknowledgements

The authors acknowledge Center for Advanced Research and Technology (CART) at the University of North Texas for access to microscopy and XRD characterisation facilities. SSJ, SK, and NBD acknowledge the financial support from the National Science Foundation (NSF-CMMI 0969249). All the authors wish to thank Dr. Raj Banerjee for providing an access to mechanical testing facility.

Notes

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Science Foundation [NSF-CMMI 0969249].