Influence of as-cast spherulites on the fracture toughness of a Zr55Cu30Al10Ni5 bulk metallic glass

S. Hin; C. Bernard; V. Doquet; Y. Yokoyama; A. Magueresse; V. Keryvin

doi:10.1016/j.msea.2018.10.061

Influence of as-cast spherulites on the fracture toughness of a Zr₅₅Cu₃₀Al₁₀Ni₅ bulk metallic glass

S. Hin, C. Bernard, V. Doquet, Y. Yokoyama, A. Magueresse, V. Keryvin

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

Abstract

This study addresses the influence of as-cast spherulites, which may be present in the glassy matrix of a bulk metallic glass owing to the processing conditions, on its fracture behaviour. The fracture toughness of a Zr₅₅Cu₃₀Al₁₀Ni₅ glass containing a low fraction as-cast spherulites (∼1% volume fraction) is investigated by means of bending tests. The resulting mode-I fracture toughness values, around 72 MPam, reveal the moderate detrimental effect of the spherulites. This result is compared to previous results for flawless and dendrite-containing glasses of the same composition, as well as with results from literature. The role played by the spherulites in crack propagation, under mode I and II, and fracture is finally addressed by means of fractography observations and finite element computations.

Original language	English
Pages (from-to)	137-147
Number of pages	11
Journal	Materials Science and Engineering: A
Volume	740-741
DOIs	https://doi.org/10.1016/j.msea.2018.10.061
Publication status	Published - 7 Jan 2019
Externally published	Yes

Keywords

Crack
Crystalline defects
Fracture
Metallic glass
Processing
Toughness

Access to Document

10.1016/j.msea.2018.10.061

Cite this

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title = "Influence of as-cast spherulites on the fracture toughness of a Zr55Cu30Al10Ni5 bulk metallic glass",

abstract = "This study addresses the influence of as-cast spherulites, which may be present in the glassy matrix of a bulk metallic glass owing to the processing conditions, on its fracture behaviour. The fracture toughness of a Zr55Cu30Al10Ni5 glass containing a low fraction as-cast spherulites (∼1\% volume fraction) is investigated by means of bending tests. The resulting mode-I fracture toughness values, around 72 MPam, reveal the moderate detrimental effect of the spherulites. This result is compared to previous results for flawless and dendrite-containing glasses of the same composition, as well as with results from literature. The role played by the spherulites in crack propagation, under mode I and II, and fracture is finally addressed by means of fractography observations and finite element computations.",

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author = "S. Hin and C. Bernard and V. Doquet and Y. Yokoyama and A. Magueresse and V. Keryvin",

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doi = "10.1016/j.msea.2018.10.061",

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TY - JOUR

T1 - Influence of as-cast spherulites on the fracture toughness of a Zr55Cu30Al10Ni5 bulk metallic glass

AU - Hin, S.

AU - Bernard, C.

AU - Doquet, V.

AU - Yokoyama, Y.

AU - Magueresse, A.

AU - Keryvin, V.

PY - 2019/1/7

Y1 - 2019/1/7

N2 - This study addresses the influence of as-cast spherulites, which may be present in the glassy matrix of a bulk metallic glass owing to the processing conditions, on its fracture behaviour. The fracture toughness of a Zr55Cu30Al10Ni5 glass containing a low fraction as-cast spherulites (∼1% volume fraction) is investigated by means of bending tests. The resulting mode-I fracture toughness values, around 72 MPam, reveal the moderate detrimental effect of the spherulites. This result is compared to previous results for flawless and dendrite-containing glasses of the same composition, as well as with results from literature. The role played by the spherulites in crack propagation, under mode I and II, and fracture is finally addressed by means of fractography observations and finite element computations.

AB - This study addresses the influence of as-cast spherulites, which may be present in the glassy matrix of a bulk metallic glass owing to the processing conditions, on its fracture behaviour. The fracture toughness of a Zr55Cu30Al10Ni5 glass containing a low fraction as-cast spherulites (∼1% volume fraction) is investigated by means of bending tests. The resulting mode-I fracture toughness values, around 72 MPam, reveal the moderate detrimental effect of the spherulites. This result is compared to previous results for flawless and dendrite-containing glasses of the same composition, as well as with results from literature. The role played by the spherulites in crack propagation, under mode I and II, and fracture is finally addressed by means of fractography observations and finite element computations.

KW - Crack

KW - Crystalline defects

KW - Fracture

KW - Metallic glass

KW - Processing

KW - Toughness

U2 - 10.1016/j.msea.2018.10.061

DO - 10.1016/j.msea.2018.10.061

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SN - 0921-5093

VL - 740-741

SP - 137

EP - 147

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A