3D pore structure characterization and hardness in a powder bed fusion-processed fully amorphous Zr-based bulk metallic glass

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3D pore structure characterization and hardness in a powder bed fusion-processed fully amorphous Zr-based bulk metallic glass. / Shi, Jianye; Ma, Songyun; Wei, Shuai; Best, James P.; Stolpe, Moritz; Beckmann, Agnes; Mostafavi, Shimaalsadat; Korte-Kerzel, Sandra; Markert, Bernd.

I: Materials Characterization, Bind 162, 110178, 04.2020.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

Shi, J, Ma, S, Wei, S, Best, JP, Stolpe, M, Beckmann, A, Mostafavi, S, Korte-Kerzel, S & Markert, B 2020, '3D pore structure characterization and hardness in a powder bed fusion-processed fully amorphous Zr-based bulk metallic glass', Materials Characterization, bind 162, 110178. https://doi.org/10.1016/j.matchar.2020.110178

APA

Shi, J., Ma, S., Wei, S., Best, J. P., Stolpe, M., Beckmann, A., Mostafavi, S., Korte-Kerzel, S., & Markert, B. (2020). 3D pore structure characterization and hardness in a powder bed fusion-processed fully amorphous Zr-based bulk metallic glass. Materials Characterization, 162, [110178]. https://doi.org/10.1016/j.matchar.2020.110178

CBE

Shi J, Ma S, Wei S, Best JP, Stolpe M, Beckmann A, Mostafavi S, Korte-Kerzel S, Markert B. 2020. 3D pore structure characterization and hardness in a powder bed fusion-processed fully amorphous Zr-based bulk metallic glass. Materials Characterization. 162:Article 110178. https://doi.org/10.1016/j.matchar.2020.110178

MLA

Vancouver

Author

Shi, Jianye ; Ma, Songyun ; Wei, Shuai ; Best, James P. ; Stolpe, Moritz ; Beckmann, Agnes ; Mostafavi, Shimaalsadat ; Korte-Kerzel, Sandra ; Markert, Bernd. / 3D pore structure characterization and hardness in a powder bed fusion-processed fully amorphous Zr-based bulk metallic glass. I: Materials Characterization. 2020 ; Bind 162.

Bibtex

@article{71f24de5b0d24d9e8fcb78081b10d95d,
title = "3D pore structure characterization and hardness in a powder bed fusion-processed fully amorphous Zr-based bulk metallic glass",
abstract = "Recently, fabrication of bulk metallic glasses (BMGs) components with complex shapes has been realized using laser powder bed fusion (PBF). Initial defects such as porosity inherent to the PBF process can significantly degrade the mechanical integrity of the BMGs components. In spite of intensive studies on pore structures in 3D-printed crystalline alloys, pore structures in 3D-printed fully amorphous BMGs have not been characterized due to the difficulties in achieving large-scale fully amorphous structures. In the present work, the pore characteristics of PBF-processed fully amorphous Zr-based BMGs were systematically studied. The amorphous structure of the printed parts was first verified using X-ray diffraction (XRD). A non-destructive high-resolution X-ray micro-computed tomography (micro-CT) technique was then applied to evaluate the inner 3D pore structure, while microstructures below the resolution of X-ray micro-CT were examined in 2D using scanning electron microscopy (SEM). The printed amorphous parts can reach a total volumetric porosity as small as 0.45%. The distribution of pore size and pore sphericity were evaluated for the PBF-processed BMGs samples with different porosities, where two observed pore features were irregular large lack-of-fusion pores, and smaller gas-induced round pores. Furthermore, correlations were found between porosity, pore size and morphology. Finally, hardness tests at various loads revealed that while the intrinsic properties were constant irrespective of laser processing, the overall mechanical properties of the PBF-processed BMGs samples are dominated by pore characteristics. While the densest printed BMG sample had a comparable macroscale hardness to the as-cast material, an increase in porosity of ~8% led to a decrease in HV5 hardness of ~17%. The presented results provide a detailed analysis of pore characteristics, and their impact on mechanical properties of PBF-processed BMGs, for further experimental and computational studies of structure-property relationships in this materials class.",
keywords = "Bulk metallic glass, Hardness, Pore morphology, Porosity, Powder bed fusion, X-ray micro-computed tomography, POROSITY, DAMAGE EVOLUTION, BEHAVIOR, QUANTIFICATION, STRENGTH, MECHANICAL-PROPERTIES, THERMODYNAMICS, KINETICS, PROCESS PARAMETERS, MICROSTRUCTURE",
author = "Jianye Shi and Songyun Ma and Shuai Wei and Best, {James P.} and Moritz Stolpe and Agnes Beckmann and Shimaalsadat Mostafavi and Sandra Korte-Kerzel and Bernd Markert",
year = "2020",
month = apr,
doi = "10.1016/j.matchar.2020.110178",
language = "English",
volume = "162",
journal = "Materials Characterization",
issn = "1044-5803",
publisher = "Elsevier Inc.",

}

RIS

TY - JOUR

T1 - 3D pore structure characterization and hardness in a powder bed fusion-processed fully amorphous Zr-based bulk metallic glass

AU - Shi, Jianye

AU - Ma, Songyun

AU - Wei, Shuai

AU - Best, James P.

AU - Stolpe, Moritz

AU - Beckmann, Agnes

AU - Mostafavi, Shimaalsadat

AU - Korte-Kerzel, Sandra

AU - Markert, Bernd

PY - 2020/4

Y1 - 2020/4

N2 - Recently, fabrication of bulk metallic glasses (BMGs) components with complex shapes has been realized using laser powder bed fusion (PBF). Initial defects such as porosity inherent to the PBF process can significantly degrade the mechanical integrity of the BMGs components. In spite of intensive studies on pore structures in 3D-printed crystalline alloys, pore structures in 3D-printed fully amorphous BMGs have not been characterized due to the difficulties in achieving large-scale fully amorphous structures. In the present work, the pore characteristics of PBF-processed fully amorphous Zr-based BMGs were systematically studied. The amorphous structure of the printed parts was first verified using X-ray diffraction (XRD). A non-destructive high-resolution X-ray micro-computed tomography (micro-CT) technique was then applied to evaluate the inner 3D pore structure, while microstructures below the resolution of X-ray micro-CT were examined in 2D using scanning electron microscopy (SEM). The printed amorphous parts can reach a total volumetric porosity as small as 0.45%. The distribution of pore size and pore sphericity were evaluated for the PBF-processed BMGs samples with different porosities, where two observed pore features were irregular large lack-of-fusion pores, and smaller gas-induced round pores. Furthermore, correlations were found between porosity, pore size and morphology. Finally, hardness tests at various loads revealed that while the intrinsic properties were constant irrespective of laser processing, the overall mechanical properties of the PBF-processed BMGs samples are dominated by pore characteristics. While the densest printed BMG sample had a comparable macroscale hardness to the as-cast material, an increase in porosity of ~8% led to a decrease in HV5 hardness of ~17%. The presented results provide a detailed analysis of pore characteristics, and their impact on mechanical properties of PBF-processed BMGs, for further experimental and computational studies of structure-property relationships in this materials class.

AB - Recently, fabrication of bulk metallic glasses (BMGs) components with complex shapes has been realized using laser powder bed fusion (PBF). Initial defects such as porosity inherent to the PBF process can significantly degrade the mechanical integrity of the BMGs components. In spite of intensive studies on pore structures in 3D-printed crystalline alloys, pore structures in 3D-printed fully amorphous BMGs have not been characterized due to the difficulties in achieving large-scale fully amorphous structures. In the present work, the pore characteristics of PBF-processed fully amorphous Zr-based BMGs were systematically studied. The amorphous structure of the printed parts was first verified using X-ray diffraction (XRD). A non-destructive high-resolution X-ray micro-computed tomography (micro-CT) technique was then applied to evaluate the inner 3D pore structure, while microstructures below the resolution of X-ray micro-CT were examined in 2D using scanning electron microscopy (SEM). The printed amorphous parts can reach a total volumetric porosity as small as 0.45%. The distribution of pore size and pore sphericity were evaluated for the PBF-processed BMGs samples with different porosities, where two observed pore features were irregular large lack-of-fusion pores, and smaller gas-induced round pores. Furthermore, correlations were found between porosity, pore size and morphology. Finally, hardness tests at various loads revealed that while the intrinsic properties were constant irrespective of laser processing, the overall mechanical properties of the PBF-processed BMGs samples are dominated by pore characteristics. While the densest printed BMG sample had a comparable macroscale hardness to the as-cast material, an increase in porosity of ~8% led to a decrease in HV5 hardness of ~17%. The presented results provide a detailed analysis of pore characteristics, and their impact on mechanical properties of PBF-processed BMGs, for further experimental and computational studies of structure-property relationships in this materials class.

KW - Bulk metallic glass

KW - Hardness

KW - Pore morphology

KW - Porosity

KW - Powder bed fusion

KW - X-ray micro-computed tomography

KW - POROSITY

KW - DAMAGE EVOLUTION

KW - BEHAVIOR

KW - QUANTIFICATION

KW - STRENGTH

KW - MECHANICAL-PROPERTIES

KW - THERMODYNAMICS

KW - KINETICS

KW - PROCESS PARAMETERS

KW - MICROSTRUCTURE

UR - http://www.scopus.com/inward/record.url?scp=85079085934&partnerID=8YFLogxK

U2 - 10.1016/j.matchar.2020.110178

DO - 10.1016/j.matchar.2020.110178

M3 - Journal article

AN - SCOPUS:85079085934

VL - 162

JO - Materials Characterization

JF - Materials Characterization

SN - 1044-5803

M1 - 110178

ER -