Strain hardening at elevated temperatures induced by dynamic crystallization of an Al 88Ni 4Y 8 amorphous alloy

H. W. Yang; M. J. Tan; R. V. Ramanujan

doi:10.1016/j.scriptamat.2011.11.038

Strain hardening at elevated temperatures induced by dynamic crystallization of an Al ₈₈Ni ₄Y ₈ amorphous alloy

H. W. Yang^*, M. J. Tan, R. V. Ramanujan

^*Corresponding author for this work

Nanyang Technological University

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

6 Citations (Scopus)

Abstract

Tensile tests were carried out on amorphous Al ₈₈Ni ₄Y ₈ ribbons at room and high temperatures. The fracture strength at room temperature was 889 MPa, with an elastic strain of ∼1.35%. At 200 °C the tensile strength was 816 MPa, with a total strain of 16.8%. Modulated differential scanning calorimeter results revealed the existence of a "hidden" glass transition, which resulted in viscous flow and large plastic deformation. Dynamic crystallization during tensile tests accounted for the observed strain hardening behavior.

Original language	English
Pages (from-to)	382-385
Number of pages	4
Journal	Scripta Materialia
Volume	66
Issue number	6
DOIs	https://doi.org/10.1016/j.scriptamat.2011.11.038
Publication status	Published - Mar 2012
Externally published	Yes

ASJC Scopus Subject Areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Keywords

Crystallization
Mechanical properties
Metallic glass
Strain hardening

Access to Document

10.1016/j.scriptamat.2011.11.038

Cite this

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title = "Strain hardening at elevated temperatures induced by dynamic crystallization of an Al 88Ni 4Y 8 amorphous alloy",

abstract = "Tensile tests were carried out on amorphous Al 88Ni 4Y 8 ribbons at room and high temperatures. The fracture strength at room temperature was 889 MPa, with an elastic strain of ∼1.35\%. At 200 °C the tensile strength was 816 MPa, with a total strain of 16.8\%. Modulated differential scanning calorimeter results revealed the existence of a {"}hidden{"} glass transition, which resulted in viscous flow and large plastic deformation. Dynamic crystallization during tensile tests accounted for the observed strain hardening behavior.",

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AU - Yang, H. W.

AU - Tan, M. J.

AU - Ramanujan, R. V.

PY - 2012/3

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N2 - Tensile tests were carried out on amorphous Al 88Ni 4Y 8 ribbons at room and high temperatures. The fracture strength at room temperature was 889 MPa, with an elastic strain of ∼1.35%. At 200 °C the tensile strength was 816 MPa, with a total strain of 16.8%. Modulated differential scanning calorimeter results revealed the existence of a "hidden" glass transition, which resulted in viscous flow and large plastic deformation. Dynamic crystallization during tensile tests accounted for the observed strain hardening behavior.

AB - Tensile tests were carried out on amorphous Al 88Ni 4Y 8 ribbons at room and high temperatures. The fracture strength at room temperature was 889 MPa, with an elastic strain of ∼1.35%. At 200 °C the tensile strength was 816 MPa, with a total strain of 16.8%. Modulated differential scanning calorimeter results revealed the existence of a "hidden" glass transition, which resulted in viscous flow and large plastic deformation. Dynamic crystallization during tensile tests accounted for the observed strain hardening behavior.

KW - Crystallization

KW - Mechanical properties

KW - Metallic glass

KW - Strain hardening

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