Extraordinary plasticity of an amorphous alloy based on atomistic-scale phase separation

Sang Chul Lee; Moo Young Huh; Hwi Jun Kim; Jae Chul Lee

doi:10.1016/j.msea.2007.08.068

Extraordinary plasticity of an amorphous alloy based on atomistic-scale phase separation

Sang Chul Lee, Moo Young Huh, Hwi Jun Kim, Jae Chul Lee

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

A bulk amorphous alloy, Zr₅₄Cu₃₆Al₄Be₆, was synthesized. This alloy shows a large plastic strain of ∼22.1% along with a work hardening of 485 MPa, which have hardly been observed in monolithic bulk amorphous alloys. Microstructures of this alloy were observed to investigate the origin of the extraordinary plasticity of the alloy. The alloy exhibited a unique microstructure characterized by an atomistic-scale phase separation, which probably stems from the large difference in mixing enthalpy between the binary pairs of Zr-Be and Cu-Be. This paper discusses the possible mechanism underlying the extraordinary plasticity of the alloy by considering the atomic packing density and atomistic-scale compositional separation induced by Be.

Original language	English
Pages (from-to)	61-65
Number of pages	5
Journal	Materials Science and Engineering A
Volume	485
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2007.08.068
Publication status	Published - 2008 Jun 25

Bibliographical note

Funding Information:
This research was supported by grants from the Basic Research Program (R01-2004-000-10891-0) of the Ministry of Science and Technology and the Next Generation-New Technology Development program (10006938-2005-21) of the Ministry of Commerce, Industry and Energy, Korea.

Keywords

Bulk amorphous alloy
Phase separation
Plasticity

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2007.08.068

Cite this

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title = "Extraordinary plasticity of an amorphous alloy based on atomistic-scale phase separation",

abstract = "A bulk amorphous alloy, Zr54Cu36Al4Be6, was synthesized. This alloy shows a large plastic strain of ∼22.1% along with a work hardening of 485 MPa, which have hardly been observed in monolithic bulk amorphous alloys. Microstructures of this alloy were observed to investigate the origin of the extraordinary plasticity of the alloy. The alloy exhibited a unique microstructure characterized by an atomistic-scale phase separation, which probably stems from the large difference in mixing enthalpy between the binary pairs of Zr-Be and Cu-Be. This paper discusses the possible mechanism underlying the extraordinary plasticity of the alloy by considering the atomic packing density and atomistic-scale compositional separation induced by Be.",

keywords = "Bulk amorphous alloy, Phase separation, Plasticity",

author = "Lee, {Sang Chul} and Huh, {Moo Young} and Kim, {Hwi Jun} and Lee, {Jae Chul}",

note = "Funding Information: This research was supported by grants from the Basic Research Program (R01-2004-000-10891-0) of the Ministry of Science and Technology and the Next Generation-New Technology Development program (10006938-2005-21) of the Ministry of Commerce, Industry and Energy, Korea.",

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AU - Lee, Sang Chul

AU - Huh, Moo Young

AU - Kim, Hwi Jun

AU - Lee, Jae Chul

N1 - Funding Information: This research was supported by grants from the Basic Research Program (R01-2004-000-10891-0) of the Ministry of Science and Technology and the Next Generation-New Technology Development program (10006938-2005-21) of the Ministry of Commerce, Industry and Energy, Korea.

PY - 2008/6/25

Y1 - 2008/6/25

N2 - A bulk amorphous alloy, Zr54Cu36Al4Be6, was synthesized. This alloy shows a large plastic strain of ∼22.1% along with a work hardening of 485 MPa, which have hardly been observed in monolithic bulk amorphous alloys. Microstructures of this alloy were observed to investigate the origin of the extraordinary plasticity of the alloy. The alloy exhibited a unique microstructure characterized by an atomistic-scale phase separation, which probably stems from the large difference in mixing enthalpy between the binary pairs of Zr-Be and Cu-Be. This paper discusses the possible mechanism underlying the extraordinary plasticity of the alloy by considering the atomic packing density and atomistic-scale compositional separation induced by Be.

AB - A bulk amorphous alloy, Zr54Cu36Al4Be6, was synthesized. This alloy shows a large plastic strain of ∼22.1% along with a work hardening of 485 MPa, which have hardly been observed in monolithic bulk amorphous alloys. Microstructures of this alloy were observed to investigate the origin of the extraordinary plasticity of the alloy. The alloy exhibited a unique microstructure characterized by an atomistic-scale phase separation, which probably stems from the large difference in mixing enthalpy between the binary pairs of Zr-Be and Cu-Be. This paper discusses the possible mechanism underlying the extraordinary plasticity of the alloy by considering the atomic packing density and atomistic-scale compositional separation induced by Be.

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KW - Phase separation

KW - Plasticity

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JF - Materials Science and Engineering A

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ER -

Extraordinary plasticity of an amorphous alloy based on atomistic-scale phase separation

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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