Comparison of fatigue behavior of a bulk metallic glass and its composite

G. Y. Wang; P. K. Liaw; A. Peker; M. Freels; W. H. Peter; R. A. Buchanan; C. R. Brooks

doi:10.1016/j.intermet.2006.01.045

Comparison of fatigue behavior of a bulk metallic glass and its composite

G. Y. Wang, P. K. Liaw, A. Peker, M. Freels, W. H. Peter, R. A. Buchanan, C. R. Brooks

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

58 Scopus citations

Abstract

The X-ray diffraction results show that LM001 (Zr_41.2Ti_13.8Cu_12.5Ni₁₀Be_22.5) is a monolithic bulk-metallic glass (BMG) and LM002 (Zr_56.2Ti_13.8Nb_5.0Cu_6.9Ni_5.6Be_12.5) is a BMG containing crystalline phases. High-cycle-fatigue (HCF) studies were performed on these zirconium (Zr)-based BMGs. The HCF experiments were conducted, using an electrohydraulic machine at a frequency of 10 Hz with an R ratio of 0.1 and under tension-tension loading, where R=σ_min/σ_max, where σ_min and σ_max are the applied minimum and maximum stresses, respectively. The test environment was air at room temperature. The vein pattern and droplets with a melted appearance were observed in the apparent melting region. The fatigue-endurance limit (239 MPa) of LM002 was found to be significantly shorter than that (567 MPa) of LM001, which indicates that the presence of crystalline phase could reduce the resistances to fatigue. The tension-tension fatigue S (applied stress)-N (lifetime) curve of the present composite was found to be comparable with the four-point-bend result of the composite in the literature. However, the tension-tension fatigue lifetime of the present monolithic BMG was much greater than that of the four-point-bend fatigue of the monolithic BMG in the literature. The fracture morphology indicates that fatigue cracks initiate from porosities or inclusions. The whole fracture surface of LM001 is perpendicular to the loading direction. However, a part of the fracture surface of LM002 is not perpendicular to the loading direction. It demonstrates a ductile facture feature. A mechanistic understanding of the fatigue behavior of the Zr-based BMGs is suggested.

Original language	English
Pages (from-to)	1091-1097
Number of pages	7
Journal	Intermetallics
Volume	14
Issue number	8-9
DOIs	https://doi.org/10.1016/j.intermet.2006.01.045
State	Published - Aug 2006
Externally published	Yes

Funding

We would like to acknowledge the financial support of the National Science Foundation, the Division of Design, Manufacture, and Industrial Innovation, under Grant No. DMI-9724476, the Combined Research-Curriculum Development (CRCD) Programs, under EEC-9527527 and EEC-0203415, the Integrative Graduate Education and Research Training (IGERT) Program, under DGE-9987548, and the International Materials Institutes (IMI), under DMR-0231320, to the University of Tennessee, Knoxville, with Dr D. Durham, Ms M. Poats, C. Dr J. Van Hartesveldt, Dr D. Dutta, Dr W. Jennings, Dr L. Goldberg, and Dr C. Huber as Program Directors, respectively.

Funders	Funder number
Division of Design, Manufacture, and Industrial Innovation
National Science Foundation

Keywords

B. Fatigue resistance and crack growth
C. Casting
F. Electron microscopy, scanning

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10.1016/j.intermet.2006.01.045

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title = "Comparison of fatigue behavior of a bulk metallic glass and its composite",

abstract = "The X-ray diffraction results show that LM001 (Zr41.2Ti13.8Cu12.5Ni10Be22.5) is a monolithic bulk-metallic glass (BMG) and LM002 (Zr56.2Ti13.8Nb5.0Cu6.9Ni5.6Be12.5) is a BMG containing crystalline phases. High-cycle-fatigue (HCF) studies were performed on these zirconium (Zr)-based BMGs. The HCF experiments were conducted, using an electrohydraulic machine at a frequency of 10 Hz with an R ratio of 0.1 and under tension-tension loading, where R=σmin/σmax, where σmin and σmax are the applied minimum and maximum stresses, respectively. The test environment was air at room temperature. The vein pattern and droplets with a melted appearance were observed in the apparent melting region. The fatigue-endurance limit (239 MPa) of LM002 was found to be significantly shorter than that (567 MPa) of LM001, which indicates that the presence of crystalline phase could reduce the resistances to fatigue. The tension-tension fatigue S (applied stress)-N (lifetime) curve of the present composite was found to be comparable with the four-point-bend result of the composite in the literature. However, the tension-tension fatigue lifetime of the present monolithic BMG was much greater than that of the four-point-bend fatigue of the monolithic BMG in the literature. The fracture morphology indicates that fatigue cracks initiate from porosities or inclusions. The whole fracture surface of LM001 is perpendicular to the loading direction. However, a part of the fracture surface of LM002 is not perpendicular to the loading direction. It demonstrates a ductile facture feature. A mechanistic understanding of the fatigue behavior of the Zr-based BMGs is suggested.",

keywords = "B. Fatigue resistance and crack growth, C. Casting, F. Electron microscopy, scanning",

author = "Wang, {G. Y.} and Liaw, {P. K.} and A. Peker and M. Freels and Peter, {W. H.} and Buchanan, {R. A.} and Brooks, {C. R.}",

year = "2006",

month = aug,

doi = "10.1016/j.intermet.2006.01.045",

language = "English",

volume = "14",

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journal = "Intermetallics",

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T1 - Comparison of fatigue behavior of a bulk metallic glass and its composite

AU - Wang, G. Y.

AU - Liaw, P. K.

AU - Peker, A.

AU - Freels, M.

AU - Peter, W. H.

AU - Buchanan, R. A.

AU - Brooks, C. R.

PY - 2006/8

Y1 - 2006/8

N2 - The X-ray diffraction results show that LM001 (Zr41.2Ti13.8Cu12.5Ni10Be22.5) is a monolithic bulk-metallic glass (BMG) and LM002 (Zr56.2Ti13.8Nb5.0Cu6.9Ni5.6Be12.5) is a BMG containing crystalline phases. High-cycle-fatigue (HCF) studies were performed on these zirconium (Zr)-based BMGs. The HCF experiments were conducted, using an electrohydraulic machine at a frequency of 10 Hz with an R ratio of 0.1 and under tension-tension loading, where R=σmin/σmax, where σmin and σmax are the applied minimum and maximum stresses, respectively. The test environment was air at room temperature. The vein pattern and droplets with a melted appearance were observed in the apparent melting region. The fatigue-endurance limit (239 MPa) of LM002 was found to be significantly shorter than that (567 MPa) of LM001, which indicates that the presence of crystalline phase could reduce the resistances to fatigue. The tension-tension fatigue S (applied stress)-N (lifetime) curve of the present composite was found to be comparable with the four-point-bend result of the composite in the literature. However, the tension-tension fatigue lifetime of the present monolithic BMG was much greater than that of the four-point-bend fatigue of the monolithic BMG in the literature. The fracture morphology indicates that fatigue cracks initiate from porosities or inclusions. The whole fracture surface of LM001 is perpendicular to the loading direction. However, a part of the fracture surface of LM002 is not perpendicular to the loading direction. It demonstrates a ductile facture feature. A mechanistic understanding of the fatigue behavior of the Zr-based BMGs is suggested.

AB - The X-ray diffraction results show that LM001 (Zr41.2Ti13.8Cu12.5Ni10Be22.5) is a monolithic bulk-metallic glass (BMG) and LM002 (Zr56.2Ti13.8Nb5.0Cu6.9Ni5.6Be12.5) is a BMG containing crystalline phases. High-cycle-fatigue (HCF) studies were performed on these zirconium (Zr)-based BMGs. The HCF experiments were conducted, using an electrohydraulic machine at a frequency of 10 Hz with an R ratio of 0.1 and under tension-tension loading, where R=σmin/σmax, where σmin and σmax are the applied minimum and maximum stresses, respectively. The test environment was air at room temperature. The vein pattern and droplets with a melted appearance were observed in the apparent melting region. The fatigue-endurance limit (239 MPa) of LM002 was found to be significantly shorter than that (567 MPa) of LM001, which indicates that the presence of crystalline phase could reduce the resistances to fatigue. The tension-tension fatigue S (applied stress)-N (lifetime) curve of the present composite was found to be comparable with the four-point-bend result of the composite in the literature. However, the tension-tension fatigue lifetime of the present monolithic BMG was much greater than that of the four-point-bend fatigue of the monolithic BMG in the literature. The fracture morphology indicates that fatigue cracks initiate from porosities or inclusions. The whole fracture surface of LM001 is perpendicular to the loading direction. However, a part of the fracture surface of LM002 is not perpendicular to the loading direction. It demonstrates a ductile facture feature. A mechanistic understanding of the fatigue behavior of the Zr-based BMGs is suggested.

KW - B. Fatigue resistance and crack growth

KW - C. Casting

KW - F. Electron microscopy, scanning

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U2 - 10.1016/j.intermet.2006.01.045

DO - 10.1016/j.intermet.2006.01.045

M3 - Article

AN - SCOPUS:33646162405

SN - 0966-9795

VL - 14

SP - 1091

EP - 1097

JO - Intermetallics

JF - Intermetallics

IS - 8-9

ER -

Comparison of fatigue behavior of a bulk metallic glass and its composite

Abstract

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Keywords

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