Effect of cold rolling on the pressure coefficient of glass transition temperature in bulk metallic glasses

Parijat P. Jana, Jürgen Eckert, Jayanta Das

Research output: Contribution to journalArticleResearchpeer-review


Vitreous alloys exhibit changes in the specific heat capacity (Δcp) as well as configuration at the characteristic
glass transition temperature (Tg). A wide variety of bulk metallic glasses (BMGs) such as, Zr47.5Cu47.5Al5,
Zr55Cu30Ni5Al10, Zr52.5Cu17.9Ni14.6Al10Ti5 and Zr41.2Ti13.8Cu12.5Ni10Be22.5 were rolled at room temperature, and
the variation of Tg, Δcp at Tg, configurational entropy (ΔSconf.), pressure coefficient of Tg (dTg/dP) and bending
strength were measured to understand the configurational change in BMGs upon cold rolling. The normalized
bending moment during yielding of a cold rolled Zr55Cu30Ni5Al10 has increased by 43.4% than the as-cast
specimen. The ΔSconf. of the Zr55Cu30Ni5Al10 plate increased upon rolling from 0.537±0.041 J/mol∙K for as-
cast to 0.654±0.032 J/mol∙K for 70% cold rolled sample. A relaxed glassy state with low Tg exhibits high
dTg/dP value and vice versa.
Original languageEnglish
Article number179071
Number of pages8
JournalThermochimica Acta
Issue numberDecember
Early online date2 Oct 2021
Publication statusPublished - Dec 2021

Bibliographical note

Publisher Copyright: © 2021


  • Bending test
  • Bulk metallic glass
  • Differential scanning calorimetry
  • Rolling
  • Specific heat
  • Thermal stability

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