Medium range ordering and its effect on plasticity of Fe-Mn-B-Y-Nb bulk metallic glass

被引：29

作者：

Park, J. M. ^{[1
,2
]}

Na, J. H. ^{[1
]}

Kim, D. H. ^{[1
]}

Kim, K. B. ^{[3
]}

Mattern, N. ^{[2
]}

Kuehn, U. ^{[2
]}

Eckert, J. ^{[2
,4
]}

机构：

[1] Yonsei Univ, Dept Met Engn, Ctr Non Crystalline Mat, Seoul 120749, South Korea

[2] Inst Complex Mat, IFW Dresden, D-01171 Dresden, Germany

[3] Sejong Univ, Fac Nanotechnol & Adv Mat Engn, Seoul 143747, South Korea

[4] Tech Univ Dresden, Inst Mat Sci, D-01062 Dresden, Germany

来源：

PHILOSOPHICAL MAGAZINE | 2010年 / 90卷 / 19期

关键词：

glass transition; supercooled liquid region; strength; plasticity; SOFT-MAGNETIC PROPERTIES; FORMING ABILITY; MECHANICAL-PROPERTIES; THERMAL-STABILITY; SUPERCOOLED LIQUID; AMORPHOUS STEELS; ALLOYS; BEHAVIOR; TEMPERATURE; STRENGTH;

D O I：

10.1080/14786431003662556

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Glass formation, thermal properties and mechanical behavior were investigated in a series of Fe65-xMn13B17Y5Nbx (x = 0, 3, 5 and 7) alloys. Appropriate partial substitution of Fe by Nb in a Fe65Mn13B17Y5 bulk glassy alloy simultaneously enhances the glass-forming ability and the mechanical properties of the alloys. The Nb-containing glassy alloys exhibit an additional exothermic event in the supercooled liquid region. This exothermic reaction is correlated with the formation of medium range ordered (MRO) clusters originated from the large difference in mixing enthalpy between constituent elements such as Nb-Y (+30 kJ/mol) and Nb-B (-39 kJ/mol). The presence of MRO clusters in the as-cast state is dependent on the cooling condition from the liquid state, and plays a crucial role in providing plasticity in as-cast Fe-Mn-B-Y-Nb bulk metallic glass.

引用

页码：2619 / 2633

页数：15

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