Investigation of amorphous and crystalline Ni alloys response to machining with micro-second and pico-second lasers

I Quintana*, T Dobrev, A Aranzabe, G Lalev, Stefan Dimov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


The machining response of amorphous and polycrystalline Ni-based alloys (Ni78B14Si8) when subjected to micro-second and pico-second laser processing is investigated in this research. The shape and topography of craters created with single pulses as a function of laser energy together with holes drilled in both materials were studied. Focused ion beam (FIB) imaging was used to analyse the single craters and the through holes in the amorphous and polycrystalline samples. The material microstructure analysis revealed that processing both materials with micro-second and pico-second lasers does not lead to crystallisation and the short-range atomic ordering of metallic glasses can be retained. When processing the amorphous sample the material laser interactions resulted in a significant ejection of molten material from the bulk that was then followed by its partial re-deposition around the craters. Additionally, there were no signs of crack formation that indicate a higher surface integrity after laser machining. A conclusion is made that laser processing both with short- and long-pulses is a promising technique for micromachining metallic glasses because it does not lead to material crystallisation.
Original languageEnglish
Pages (from-to)6641-6646
Number of pages6
JournalApplied Surface Science
Issue number13-14
Early online date3 Mar 2009
Publication statusPublished - 15 Apr 2009


  • Amorphous Ni
  • Laser ablation
  • Micro-second laser
  • Pico-second laser
  • Focused ion beam


Dive into the research topics of 'Investigation of amorphous and crystalline Ni alloys response to machining with micro-second and pico-second lasers'. Together they form a unique fingerprint.

Cite this