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Crystallization of a Zr-based metallic glass produced by laser powder bed fusion and suction casting

Ericsson, A. LU ; Pacheco, V. ; Marattukalam, J. J. ; Dalgliesh, R. M. ; Rennie, A. R. ; Fisk, M. LU and Sahlberg, M. (2021) In Journal of Non-Crystalline Solids 571.
Abstract

The crystallization behaviour during low temperature annealing of samples of the Zr59.3Cu28.8Al10.4Nb1.5 (at%) bulk metallic glass produced by suction casting and the laser powder bed fusion (LPBF) process were studied with small angle neutron scattering (SANS), X-ray diffraction and scanning electron microscopy. The in-situ SANS measurements during isothermal annealing reveals that the phase separation in the LPBF processed material proceeds at a smaller characteristic length-scale than the cast material. Quantitative analysis of the SANS data shows that, while the crystallization process in both materials proceed through rapid nucleation followed by diffusion limited growth, the LPBF... (More)

The crystallization behaviour during low temperature annealing of samples of the Zr59.3Cu28.8Al10.4Nb1.5 (at%) bulk metallic glass produced by suction casting and the laser powder bed fusion (LPBF) process were studied with small angle neutron scattering (SANS), X-ray diffraction and scanning electron microscopy. The in-situ SANS measurements during isothermal annealing reveals that the phase separation in the LPBF processed material proceeds at a smaller characteristic length-scale than the cast material. Quantitative analysis of the SANS data shows that, while the crystallization process in both materials proceed through rapid nucleation followed by diffusion limited growth, the LPBF processed material crystallizes with a smaller cluster size and at a higher rate. The smaller cluster size is attributed to the elevated oxygen content in the LPBF processed material which reduces the nucleation barrier and thus the thermal stability.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Additive manufacturing, AMZ4, Crystallization, Oxygen, Small angle scattering
in
Journal of Non-Crystalline Solids
volume
571
article number
120891
publisher
Elsevier
external identifiers
  • scopus:85112511329
ISSN
0022-3093
DOI
10.1016/j.jnoncrysol.2021.120891
language
English
LU publication?
yes
id
82ca8e24-ac67-44cd-b6d9-15dde4167242
date added to LUP
2021-09-24 11:42:22
date last changed
2022-04-27 04:15:42
@article{82ca8e24-ac67-44cd-b6d9-15dde4167242,
  abstract     = {{<p>The crystallization behaviour during low temperature annealing of samples of the Zr<sub>59.3</sub>Cu<sub>28.8</sub>Al<sub>10.4</sub>Nb<sub>1.5</sub> (at%) bulk metallic glass produced by suction casting and the laser powder bed fusion (LPBF) process were studied with small angle neutron scattering (SANS), X-ray diffraction and scanning electron microscopy. The in-situ SANS measurements during isothermal annealing reveals that the phase separation in the LPBF processed material proceeds at a smaller characteristic length-scale than the cast material. Quantitative analysis of the SANS data shows that, while the crystallization process in both materials proceed through rapid nucleation followed by diffusion limited growth, the LPBF processed material crystallizes with a smaller cluster size and at a higher rate. The smaller cluster size is attributed to the elevated oxygen content in the LPBF processed material which reduces the nucleation barrier and thus the thermal stability.</p>}},
  author       = {{Ericsson, A. and Pacheco, V. and Marattukalam, J. J. and Dalgliesh, R. M. and Rennie, A. R. and Fisk, M. and Sahlberg, M.}},
  issn         = {{0022-3093}},
  keywords     = {{Additive manufacturing; AMZ4; Crystallization; Oxygen; Small angle scattering}},
  language     = {{eng}},
  month        = {{11}},
  publisher    = {{Elsevier}},
  series       = {{Journal of Non-Crystalline Solids}},
  title        = {{Crystallization of a Zr-based metallic glass produced by laser powder bed fusion and suction casting}},
  url          = {{http://dx.doi.org/10.1016/j.jnoncrysol.2021.120891}},
  doi          = {{10.1016/j.jnoncrysol.2021.120891}},
  volume       = {{571}},
  year         = {{2021}},
}