Effect of cold rolling on the pressure coefficient of glass transition temperature in bulk metallic glasses
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In: Thermochimica Acta, Vol. 706.2021, No. December, 179071, 12.2021.
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TY - JOUR
T1 - Effect of cold rolling on the pressure coefficient of glass transition temperature in bulk metallic glasses
AU - Jana, Parijat P.
AU - Eckert, Jürgen
AU - Das, Jayanta
N1 - Publisher Copyright: © 2021
PY - 2021/12
Y1 - 2021/12
N2 - Vitreous alloys exhibit changes in the specific heat capacity (Δcp) as well as configuration at the characteristicglass 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, andthe variation of Tg, Δcp at Tg, configurational entropy (ΔSconf.), pressure coefficient of Tg (dTg/dP) and bendingstrength were measured to understand the configurational change in BMGs upon cold rolling. The normalizedbending moment during yielding of a cold rolled Zr55Cu30Ni5Al10 has increased by 43.4% than the as-castspecimen. 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 highdTg/dP value and vice versa.
AB - Vitreous alloys exhibit changes in the specific heat capacity (Δcp) as well as configuration at the characteristicglass 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, andthe variation of Tg, Δcp at Tg, configurational entropy (ΔSconf.), pressure coefficient of Tg (dTg/dP) and bendingstrength were measured to understand the configurational change in BMGs upon cold rolling. The normalizedbending moment during yielding of a cold rolled Zr55Cu30Ni5Al10 has increased by 43.4% than the as-castspecimen. 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 highdTg/dP value and vice versa.
KW - Bending test
KW - Bulk metallic glass
KW - Differential scanning calorimetry
KW - Rolling
KW - Specific heat
KW - Thermal stability
UR - http://www.scopus.com/inward/record.url?scp=85116537604&partnerID=8YFLogxK
U2 - 10.1016/j.tca.2021.179071
DO - 10.1016/j.tca.2021.179071
M3 - Article
AN - SCOPUS:85116537604
VL - 706.2021
JO - Thermochimica Acta
JF - Thermochimica Acta
SN - 0040-6031
IS - December
M1 - 179071
ER -