Effects of irradiation spectrum on the microstructural and mechanical properties of bulk metallic glasses

J. Brechtl; M. L. Crespillo; S. Agarwal; H. Bei; S. J. Zinkle

doi:10.1016/j.jnucmat.2020.152084

Effects of irradiation spectrum on the microstructural and mechanical properties of bulk metallic glasses

J. Brechtl, M. L. Crespillo, S. Agarwal, H. Bei, S. J. Zinkle

Building Equipment Research Group

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

6 Scopus citations

Abstract

Zr_52.5Cu_17.9Ni_14.6Al₁₀Ti₅ (BAM-11) and Cu₆₀Zr₂₀Hf₁₀Ti₁₀ bulk metallic glass (BMG) specimens were ion irradiated to characterize and compare their irradiation induced microstructural and mechanical property evolution. For the ion irradiations, samples of each BMG were exposed to 9 MeV Ni³⁺ and 5.5 MeV C⁺ ions to a midrange (∼1.5 μm depth) dose of 0.5 displacements per atom (dpa) at temperatures ranging from room temperature to 360 °C in order to examine potential effects associated with low (5.5 MeV C) and high (9 MeV Ni) average primary knock on energies. BAM-11 BMG samples were also irradiated by neutrons (E > 0.1 MeV) at ∼70 °C to a fluence of 1.4 × 10²⁰ n/cm² (dose of 0.1 dpa). Importantly, no pronounced irradiation spectrum effects were observed for the nanoindentation mechanical properties of the two BMGs following ion irradiation. However, significant softening was observed in the BAM-11 BMG sample irradiated by neutrons, while annealing of the unirradiated samples led to a marked increase in hardening. Results of the nanoindentation experiments indicate that softening is caused by irradiation induced creation of free volume defects, while the hardening is caused by their annihilation.

Original language	English
Article number	152084
Journal	Journal of Nuclear Materials
Volume	533
DOIs	https://doi.org/10.1016/j.jnucmat.2020.152084
State	Published - May 2020

Funding

This research was sponsored in part by the Office of Fusion Energy Sciences , U.S. Department of Energy under contract DE-AC05-00OR22725 with UT-Battelle, LLC and grant # DE-SC0006661 with the University of Tennessee . The X-ray diffraction utilized UT’s Joint Institute for Advanced Materials. Dr. M. L. Crespillo acknowledges support from the University of Tennessee Governor’s Chair program. The authors are very grateful to Dr. Michael Koehler for helpful discussions regarding the XRD method and analysis. The authors would also like to thank Dr. William A. Hanson for insight regarding irradiation damage effects.

Keywords

Annealing
Irradiation spectrum effects
Metallic glasses
Microstructure
Nanoindentation
X-ray diffraction

Access to Document

10.1016/j.jnucmat.2020.152084

Cite this

@article{ea6215560e5f4b048f937d77f0a1d929,

title = "Effects of irradiation spectrum on the microstructural and mechanical properties of bulk metallic glasses",

abstract = "Zr52.5Cu17.9Ni14.6Al10Ti5 (BAM-11) and Cu60Zr20Hf10Ti10 bulk metallic glass (BMG) specimens were ion irradiated to characterize and compare their irradiation induced microstructural and mechanical property evolution. For the ion irradiations, samples of each BMG were exposed to 9 MeV Ni3+ and 5.5 MeV C+ ions to a midrange (∼1.5 μm depth) dose of 0.5 displacements per atom (dpa) at temperatures ranging from room temperature to 360 °C in order to examine potential effects associated with low (5.5 MeV C) and high (9 MeV Ni) average primary knock on energies. BAM-11 BMG samples were also irradiated by neutrons (E > 0.1 MeV) at ∼70 °C to a fluence of 1.4 × 1020 n/cm2 (dose of 0.1 dpa). Importantly, no pronounced irradiation spectrum effects were observed for the nanoindentation mechanical properties of the two BMGs following ion irradiation. However, significant softening was observed in the BAM-11 BMG sample irradiated by neutrons, while annealing of the unirradiated samples led to a marked increase in hardening. Results of the nanoindentation experiments indicate that softening is caused by irradiation induced creation of free volume defects, while the hardening is caused by their annihilation.",

keywords = "Annealing, Irradiation spectrum effects, Metallic glasses, Microstructure, Nanoindentation, X-ray diffraction",

author = "J. Brechtl and Crespillo, {M. L.} and S. Agarwal and H. Bei and Zinkle, {S. J.}",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = may,

doi = "10.1016/j.jnucmat.2020.152084",

language = "English",

volume = "533",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

}

TY - JOUR

T1 - Effects of irradiation spectrum on the microstructural and mechanical properties of bulk metallic glasses

AU - Brechtl, J.

AU - Crespillo, M. L.

AU - Agarwal, S.

AU - Bei, H.

AU - Zinkle, S. J.

PY - 2020/5

Y1 - 2020/5

N2 - Zr52.5Cu17.9Ni14.6Al10Ti5 (BAM-11) and Cu60Zr20Hf10Ti10 bulk metallic glass (BMG) specimens were ion irradiated to characterize and compare their irradiation induced microstructural and mechanical property evolution. For the ion irradiations, samples of each BMG were exposed to 9 MeV Ni3+ and 5.5 MeV C+ ions to a midrange (∼1.5 μm depth) dose of 0.5 displacements per atom (dpa) at temperatures ranging from room temperature to 360 °C in order to examine potential effects associated with low (5.5 MeV C) and high (9 MeV Ni) average primary knock on energies. BAM-11 BMG samples were also irradiated by neutrons (E > 0.1 MeV) at ∼70 °C to a fluence of 1.4 × 1020 n/cm2 (dose of 0.1 dpa). Importantly, no pronounced irradiation spectrum effects were observed for the nanoindentation mechanical properties of the two BMGs following ion irradiation. However, significant softening was observed in the BAM-11 BMG sample irradiated by neutrons, while annealing of the unirradiated samples led to a marked increase in hardening. Results of the nanoindentation experiments indicate that softening is caused by irradiation induced creation of free volume defects, while the hardening is caused by their annihilation.

AB - Zr52.5Cu17.9Ni14.6Al10Ti5 (BAM-11) and Cu60Zr20Hf10Ti10 bulk metallic glass (BMG) specimens were ion irradiated to characterize and compare their irradiation induced microstructural and mechanical property evolution. For the ion irradiations, samples of each BMG were exposed to 9 MeV Ni3+ and 5.5 MeV C+ ions to a midrange (∼1.5 μm depth) dose of 0.5 displacements per atom (dpa) at temperatures ranging from room temperature to 360 °C in order to examine potential effects associated with low (5.5 MeV C) and high (9 MeV Ni) average primary knock on energies. BAM-11 BMG samples were also irradiated by neutrons (E > 0.1 MeV) at ∼70 °C to a fluence of 1.4 × 1020 n/cm2 (dose of 0.1 dpa). Importantly, no pronounced irradiation spectrum effects were observed for the nanoindentation mechanical properties of the two BMGs following ion irradiation. However, significant softening was observed in the BAM-11 BMG sample irradiated by neutrons, while annealing of the unirradiated samples led to a marked increase in hardening. Results of the nanoindentation experiments indicate that softening is caused by irradiation induced creation of free volume defects, while the hardening is caused by their annihilation.

KW - Annealing

KW - Irradiation spectrum effects

KW - Metallic glasses

KW - Microstructure

KW - Nanoindentation

KW - X-ray diffraction

UR - http://www.scopus.com/inward/record.url?scp=85081619363&partnerID=8YFLogxK

U2 - 10.1016/j.jnucmat.2020.152084

DO - 10.1016/j.jnucmat.2020.152084

M3 - Article

AN - SCOPUS:85081619363

SN - 0022-3115

VL - 533

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

M1 - 152084

ER -

Effects of irradiation spectrum on the microstructural and mechanical properties of bulk metallic glasses

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this