Indentation creep of an Fe-based bulk metallic glass

Y. J. Huang; J. Shen; Y. L. Chiu; J. J.J. Chen; J. F. Sun

doi:10.1016/j.intermet.2008.09.014

Indentation creep of an Fe-based bulk metallic glass

Y. J. Huang
, J. Shen^*
, Y. L. Chiu
, J. J.J. Chen
, J. F. Sun

^*Corresponding author for this work

Harbin Institute of Technology
The University of Auckland
Ministry of Education of the People's Republic of China
University of Birmingham

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

87 Scopus citations

Abstract

In this study, the room temperature creep behavior of Fe₄₁Co₇Cr₁₅Mo₁₄C₁₅B₆Y₂ bulk metallic glass was investigated using nanoindentation technique with the maximum applied load ranging from 1 mN to 100 mN under different loading rates (0.01-2.5 mN s^-1). The creep stress exponent was derived from the recorded displacement-holding time curve. It was found that the stress exponent increases rapidly from 2.87 to 6.37 with increasing indentation size, i.e. exhibiting a positive indentation size dependence. Furthermore, as the indentation loading rate increases from 0.01 mN s^-1 to 2.5 mN s^-1, the stress exponent decreases gradually from 4.93 to 0.94. The deformation mechanism causing the nanoindentation creep is discussed in the light of the "shear transformation zone" (STZ) which provides qualitative explanation for the observed plasticity in amorphous alloy.

Original language	English
Pages (from-to)	190-194
Number of pages	5
Journal	Intermetallics
Volume	17
Issue number	4
DOIs	https://doi.org/10.1016/j.intermet.2008.09.014
State	Published - Apr 2009
Externally published	Yes

Keywords

B. Creep
B. Glasses, metallic
B. Mechanical properties at ambient temperature
B. Plastic deformation mechanisms
F. Mechanical testing

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10.1016/j.intermet.2008.09.014

Cite this

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title = "Indentation creep of an Fe-based bulk metallic glass",

abstract = "In this study, the room temperature creep behavior of Fe41Co7Cr15Mo14C15B6Y2 bulk metallic glass was investigated using nanoindentation technique with the maximum applied load ranging from 1 mN to 100 mN under different loading rates (0.01-2.5 mN s-1). The creep stress exponent was derived from the recorded displacement-holding time curve. It was found that the stress exponent increases rapidly from 2.87 to 6.37 with increasing indentation size, i.e. exhibiting a positive indentation size dependence. Furthermore, as the indentation loading rate increases from 0.01 mN s-1 to 2.5 mN s-1, the stress exponent decreases gradually from 4.93 to 0.94. The deformation mechanism causing the nanoindentation creep is discussed in the light of the {"}shear transformation zone{"} (STZ) which provides qualitative explanation for the observed plasticity in amorphous alloy.",

keywords = "B. Creep, B. Glasses, metallic, B. Mechanical properties at ambient temperature, B. Plastic deformation mechanisms, F. Mechanical testing",

author = "Huang, \{Y. J.\} and J. Shen and Chiu, \{Y. L.\} and Chen, \{J. J.J.\} and Sun, \{J. F.\}",

year = "2009",

month = apr,

doi = "10.1016/j.intermet.2008.09.014",

language = "英语",

volume = "17",

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journal = "Intermetallics",

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T1 - Indentation creep of an Fe-based bulk metallic glass

AU - Huang, Y. J.

AU - Shen, J.

AU - Chiu, Y. L.

AU - Chen, J. J.J.

AU - Sun, J. F.

PY - 2009/4

Y1 - 2009/4

N2 - In this study, the room temperature creep behavior of Fe41Co7Cr15Mo14C15B6Y2 bulk metallic glass was investigated using nanoindentation technique with the maximum applied load ranging from 1 mN to 100 mN under different loading rates (0.01-2.5 mN s-1). The creep stress exponent was derived from the recorded displacement-holding time curve. It was found that the stress exponent increases rapidly from 2.87 to 6.37 with increasing indentation size, i.e. exhibiting a positive indentation size dependence. Furthermore, as the indentation loading rate increases from 0.01 mN s-1 to 2.5 mN s-1, the stress exponent decreases gradually from 4.93 to 0.94. The deformation mechanism causing the nanoindentation creep is discussed in the light of the "shear transformation zone" (STZ) which provides qualitative explanation for the observed plasticity in amorphous alloy.

AB - In this study, the room temperature creep behavior of Fe41Co7Cr15Mo14C15B6Y2 bulk metallic glass was investigated using nanoindentation technique with the maximum applied load ranging from 1 mN to 100 mN under different loading rates (0.01-2.5 mN s-1). The creep stress exponent was derived from the recorded displacement-holding time curve. It was found that the stress exponent increases rapidly from 2.87 to 6.37 with increasing indentation size, i.e. exhibiting a positive indentation size dependence. Furthermore, as the indentation loading rate increases from 0.01 mN s-1 to 2.5 mN s-1, the stress exponent decreases gradually from 4.93 to 0.94. The deformation mechanism causing the nanoindentation creep is discussed in the light of the "shear transformation zone" (STZ) which provides qualitative explanation for the observed plasticity in amorphous alloy.

KW - B. Creep

KW - B. Glasses, metallic

KW - B. Mechanical properties at ambient temperature

KW - B. Plastic deformation mechanisms

KW - F. Mechanical testing

UR - https://www.scopus.com/pages/publications/60849126385

U2 - 10.1016/j.intermet.2008.09.014

DO - 10.1016/j.intermet.2008.09.014

M3 - 文章

AN - SCOPUS:60849126385

SN - 0966-9795

VL - 17

SP - 190

EP - 194

JO - Intermetallics

JF - Intermetallics

IS - 4

ER -

Indentation creep of an Fe-based bulk metallic glass

Abstract

Keywords

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