TY - JOUR
T1 - Tailoring thermally induced nano-quasicrystallization and deformation-assisted nanocrystallization for mechanical property improvement in Zr-Al-Ni-Cu-Pd bulk metallic glasses
AU - Saida, Junji
AU - Setyawan, Albertus D.
AU - Kato, Hidemi
AU - Matsushita, Mitsuhide
AU - Inoue, Akihisa
N1 - Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2009/8
Y1 - 2009/8
N2 - The material design tailoring of a synergistic effect of an in-situ nano secondary phase formation and deformation-induced nanocrystallization for improving the mechanical strength and ductility, has been investigated in Zr65Al7.5Ni10Cu17.5-xPdx bulk metallic glasses (BMGs). As-cast Zr65Al7.5Ni 10Cu17.5-xPdx (x = 5-17.5) BMGs have significant ductility in compressive deformation, which is attributed to deformation-induced dynamic nanocrystallization. The 10at% Pd-containing BMG with a low volume fraction of the quasicrystalline (QC) phase of less than 6% exhibits increases in strength and Young's modulus, in addition to a remaining plasticity of ∼5%, compared with the monolithic glassy alloy. Such improvements in the mechanical properties originate from the combination of two effects of in-situ homogeneous nano-QC formation and deformation-induced inhomogeneous nanocrystallization. The present method should be regarded as a new technique for the production of BMGs with high strength and good ductility.
AB - The material design tailoring of a synergistic effect of an in-situ nano secondary phase formation and deformation-induced nanocrystallization for improving the mechanical strength and ductility, has been investigated in Zr65Al7.5Ni10Cu17.5-xPdx bulk metallic glasses (BMGs). As-cast Zr65Al7.5Ni 10Cu17.5-xPdx (x = 5-17.5) BMGs have significant ductility in compressive deformation, which is attributed to deformation-induced dynamic nanocrystallization. The 10at% Pd-containing BMG with a low volume fraction of the quasicrystalline (QC) phase of less than 6% exhibits increases in strength and Young's modulus, in addition to a remaining plasticity of ∼5%, compared with the monolithic glassy alloy. Such improvements in the mechanical properties originate from the combination of two effects of in-situ homogeneous nano-QC formation and deformation-induced inhomogeneous nanocrystallization. The present method should be regarded as a new technique for the production of BMGs with high strength and good ductility.
KW - Deformation-induced nanocrystallization
KW - Ductility
KW - Metallic glasses
KW - Nanocomposite
KW - Nanostructure
KW - Quasicrystals
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U2 - 10.2320/matertrans.M2009135
DO - 10.2320/matertrans.M2009135
M3 - Article
AN - SCOPUS:70350113827
VL - 50
SP - 2079
EP - 2086
JO - Materials Transactions
JF - Materials Transactions
SN - 1345-9678
IS - 8
ER -