典型文献
On the shear modulus and thermal effects during structural relaxation of a model metallic glass:Correlation and thermal decoupling
文献摘要：
Pd40Ni40P20(at.％)samples with different enthalpy states were fabricated through high-pressure torsion or sub-Tg annealing of the as-cast material.Subsequently,the underlying structural relaxation was stud-ied by in-situ shear modulus measurements and modulated differential scanning calorimetry.The results show that high-pressure torsion leads to shear modulus softening and an increase of the nonreversible exothermic enthalpy,indicating a significant structural rejuvenation,while sub-Tg annealing causes shear modulus hardening and a decrease of the nonreversible exothermic enthalpy.The reversible endothermic effect which can reflect the fractional change of supercooled liquid with temperature was found to be almost identical for all samples,and independent of deformation or thermal history.The total heat flow can be well correlated with the shear modulus within the framework of interstitialcy theory.Further-more,we demonstrate that the structural relaxation below Tg decouples into internal stress relaxation and β-relaxation.In addition,this work indicates that the processes of α-relaxation and β-relaxation in the metallic glass are of similar structural origin but occur on different spatial scales.
文献关键词：
中图分类号：
作者姓名：
Hongbo Zhou;Vitaly Khonik;Gerhard Wilde
作者机构：
Institute of Materials Physics,University of Muenster,Wilhelm-Klemm Str.10,Muenster 48149,Germany;Department of General Physics,Voronezh State Pedagogical University,Lenin Str.86,Voronezh 394043,Russia
文献出处：
引用格式：
[1]Hongbo Zhou;Vitaly Khonik;Gerhard Wilde-.On the shear modulus and thermal effects during structural relaxation of a model metallic glass:Correlation and thermal decoupling)[J].材料科学技术（英文版）,2022(08):144-151
A类：
Pd40Ni40P20,nonreversible,interstitialcy
B类：
On,shear,modulus,thermal,effects,during,structural,relaxation,model,metallic,glass,Correlation,decoupling,samples,enthalpy,states,were,fabricated,through,high,pressure,torsion,sub,Tg,annealing,cast,material,Subsequently,underlying,was,stud,ied,by,situ,measurements,modulated,differential,scanning,calorimetry,results,show,that,leads,softening,increase,exothermic,indicating,significant,rejuvenation,while,causes,hardening,decrease,endothermic,which,reflect,fractional,change,supercooled,liquid,temperature,found,almost,identical,independent,deformation,history,total,heat,flow,well,correlated,within,framework,theory,Further,more,demonstrate,below,decouples,into,internal,stress,In,addition,this,indicates,processes,are,similar,origin,but,occur,spatial,scales
AB值：
0.552292
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