TY - JOUR
T1 - Unusual plasticization for structural relaxed bulk metallic glass
AU - Guo, Wei
AU - Yamada, Rui
AU - Saida, Junji
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/6/24
Y1 - 2017/6/24
N2 - Unusual plasticization for structural relaxed CuZr-based bulk metallic glass (BMG) has been found. Even though thermal-annealing usually leads to unfavorable relaxation-induced embrittlement for most BMGs, this BMG exhibits an improved plasticity after annealing. This behavior is attributed to an evolution of nanolevel heterogeneity for this unstable or heterogeneous BMG. Less initiation of shear bands by structural relaxation and evolution of heterogeneity from thermal-annealing are considered to contribute cooperatively to the plasticity of relaxed glass. This study provides a new viewpoint to improve the mechanical properties of BMGs upon relaxation, in which a microstructural heterogeneity is distributed among a glassy matrix. This finding may also expand the applications of BMGs as promising structural materials because of unusual resistances to annealing-embrittlement.
AB - Unusual plasticization for structural relaxed CuZr-based bulk metallic glass (BMG) has been found. Even though thermal-annealing usually leads to unfavorable relaxation-induced embrittlement for most BMGs, this BMG exhibits an improved plasticity after annealing. This behavior is attributed to an evolution of nanolevel heterogeneity for this unstable or heterogeneous BMG. Less initiation of shear bands by structural relaxation and evolution of heterogeneity from thermal-annealing are considered to contribute cooperatively to the plasticity of relaxed glass. This study provides a new viewpoint to improve the mechanical properties of BMGs upon relaxation, in which a microstructural heterogeneity is distributed among a glassy matrix. This finding may also expand the applications of BMGs as promising structural materials because of unusual resistances to annealing-embrittlement.
KW - Bulk amorphous alloys
KW - Nanolevel heterogeneity
KW - Plasticity
KW - Structure relaxation
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U2 - 10.1016/j.msea.2017.05.083
DO - 10.1016/j.msea.2017.05.083
M3 - Article
AN - SCOPUS:85019919012
SN - 0921-5093
VL - 699
SP - 81
EP - 87
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
ER -