Microstructural inhomogeneities introduced in a Zr-based bulk metallic glass upon low-temperature annealing

N. Van Steenberge; A. Concustell; J. Sort; J. Das; N. Mattern; A. Gebert; S. Suriñach; J. Eckert; M. D. Baró

doi:10.1016/j.msea.2008.01.083

Microstructural inhomogeneities introduced in a Zr-based bulk metallic glass upon low-temperature annealing

N. Van Steenberge, A. Concustell, J. Sort, J. Das, N. Mattern, A. Gebert, S. Suriñach, J. Eckert, M. D. Baró

Department of Physics

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

41 Citations (Scopus)

Abstract

Due to their exceptionally high yield strength and yield strain as compared to conventional metallic materials, bulk metallic glasses (BMGs) represent a class of promising engineering materials for structural applications. However, inhomogeneous deformation and severe shear localization at ambient temperature often lead to early failure and limit their reliability as structural materials. Heat treatments around the glass transition temperature (Tg) generally aggravate the intrinsic brittleness of BMGs. In this paper, we report on the evolution of a nanoscale inhomogeneous microstructure upon low-temperature annealing in a Zr55Cu30Al10Ni5 BMG. This important outcome is explained by the experimentally observed tendency for chemical decomposition between Cu and Zr of the investigated amorphous system and is in accordance with literature data on various Zr-Cu-based amorphous alloys. Finally, these local fluctuations influence the plasticity of BMGs beneficially, in contrast of the generally accepted embrittlement upon annealing. © 2008 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	124-130
Journal	Materials Science and Engineering A
Volume	491
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2008.01.083
Publication status	Published - 15 Sep 2008

Keywords

Heat treatment
Metallic glass
Microstructure
Plasticity

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title = "Microstructural inhomogeneities introduced in a Zr-based bulk metallic glass upon low-temperature annealing",

abstract = "Due to their exceptionally high yield strength and yield strain as compared to conventional metallic materials, bulk metallic glasses (BMGs) represent a class of promising engineering materials for structural applications. However, inhomogeneous deformation and severe shear localization at ambient temperature often lead to early failure and limit their reliability as structural materials. Heat treatments around the glass transition temperature (Tg) generally aggravate the intrinsic brittleness of BMGs. In this paper, we report on the evolution of a nanoscale inhomogeneous microstructure upon low-temperature annealing in a Zr55Cu30Al10Ni5 BMG. This important outcome is explained by the experimentally observed tendency for chemical decomposition between Cu and Zr of the investigated amorphous system and is in accordance with literature data on various Zr-Cu-based amorphous alloys. Finally, these local fluctuations influence the plasticity of BMGs beneficially, in contrast of the generally accepted embrittlement upon annealing. {\textcopyright} 2008 Elsevier B.V. All rights reserved.",

keywords = "Heat treatment, Metallic glass, Microstructure, Plasticity",

author = "{Van Steenberge}, N. and A. Concustell and J. Sort and J. Das and N. Mattern and A. Gebert and S. Suri{\~n}ach and J. Eckert and Bar{\'o}, {M. D.}",

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Microstructural inhomogeneities introduced in a Zr-based bulk metallic glass upon low-temperature annealing. / Van Steenberge, N.; Concustell, A.; Sort, J.; Das, J.; Mattern, N.; Gebert, A.; Suriñach, S.; Eckert, J.; Baró, M. D.

In: Materials Science and Engineering A, Vol. 491, No. 1-2, 15.09.2008, p. 124-130.

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

TY - JOUR

T1 - Microstructural inhomogeneities introduced in a Zr-based bulk metallic glass upon low-temperature annealing

AU - Van Steenberge, N.

AU - Concustell, A.

AU - Sort, J.

AU - Das, J.

AU - Mattern, N.

AU - Gebert, A.

AU - Suriñach, S.

AU - Eckert, J.

AU - Baró, M. D.

PY - 2008/9/15

Y1 - 2008/9/15

N2 - Due to their exceptionally high yield strength and yield strain as compared to conventional metallic materials, bulk metallic glasses (BMGs) represent a class of promising engineering materials for structural applications. However, inhomogeneous deformation and severe shear localization at ambient temperature often lead to early failure and limit their reliability as structural materials. Heat treatments around the glass transition temperature (Tg) generally aggravate the intrinsic brittleness of BMGs. In this paper, we report on the evolution of a nanoscale inhomogeneous microstructure upon low-temperature annealing in a Zr55Cu30Al10Ni5 BMG. This important outcome is explained by the experimentally observed tendency for chemical decomposition between Cu and Zr of the investigated amorphous system and is in accordance with literature data on various Zr-Cu-based amorphous alloys. Finally, these local fluctuations influence the plasticity of BMGs beneficially, in contrast of the generally accepted embrittlement upon annealing. © 2008 Elsevier B.V. All rights reserved.

AB - Due to their exceptionally high yield strength and yield strain as compared to conventional metallic materials, bulk metallic glasses (BMGs) represent a class of promising engineering materials for structural applications. However, inhomogeneous deformation and severe shear localization at ambient temperature often lead to early failure and limit their reliability as structural materials. Heat treatments around the glass transition temperature (Tg) generally aggravate the intrinsic brittleness of BMGs. In this paper, we report on the evolution of a nanoscale inhomogeneous microstructure upon low-temperature annealing in a Zr55Cu30Al10Ni5 BMG. This important outcome is explained by the experimentally observed tendency for chemical decomposition between Cu and Zr of the investigated amorphous system and is in accordance with literature data on various Zr-Cu-based amorphous alloys. Finally, these local fluctuations influence the plasticity of BMGs beneficially, in contrast of the generally accepted embrittlement upon annealing. © 2008 Elsevier B.V. All rights reserved.

KW - Heat treatment

KW - Metallic glass

KW - Microstructure

KW - Plasticity

U2 - 10.1016/j.msea.2008.01.083

DO - 10.1016/j.msea.2008.01.083

M3 - Article

VL - 491

SP - 124

EP - 130

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ER -