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Title: Building metallic glass structures on crystalline metal substrates by laser-foil-printing additive manufacturing

Abstract

In laser-foil-printing additive manufacturing, 3D metallic glass structures can be built by laser welding of amorphous foils, layer by layer, upon a crystalline metal substrate. Here, in this paper, weldability studies for laser welding of Zr52.5Ti5Al10Ni14.6Cu17.9 amorphous foils onto a Ti-6Al-4V (Ti 6-4) or Zr 702 substrate are conducted. After laser welding, the weldments are analyzed using X-ray diffractometer, optical microscope, scanning electron microscope equipped with energy dispersive spectroscopy and micro-hardness tester. The results show that Zr 702 is a suitable substrate for Zr-based metallic glass structure since crack-free weld joints can be obtained owing to the formation of ductile α-Zr, while Ti 6-4 is not an appropriate substrate since it has high cracking susceptibility due to the formation of a large amount of hard and brittle intermetallics near the foil-substrate interface. It was found that the mixing between melted substrate and foil is not uniform but exhibits a distinct “swirl” pattern. The swirl structure is more pronounced in Ti 6-4 than in Zr 702 substrate which may contribute to its high cracking susceptibility. The aforementioned mixing leads to partial crystallization of the first amorphous layer; however, fully amorphous is achieved in the additional welding layers.

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. Missouri Univ. of Science and Technology, Rolla, MO (United States)
Publication Date:
Research Org.:
Univ. of Missouri, Columbia, MO (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1538466
Alternate Identifier(s):
OSTI ID: 1414793
Grant/Contract Number:  
FE0012272; 16002R
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Processing Technology
Additional Journal Information:
Journal Volume: 248; Journal Issue: C; Journal ID: ISSN 0924-0136
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Engineering; Materials science; Metallic glasses; Amorphous alloys; Dissimilar metal laser welding; Additive manufacturing; Embrittlement

Citation Formats

Li, Yingqi, Shen, Yiyu, Chen, Chen, Leu, Ming C., and Tsai, Hai-Lung. Building metallic glass structures on crystalline metal substrates by laser-foil-printing additive manufacturing. United States: N. p., 2017. Web. doi:10.1016/j.jmatprotec.2017.05.032.
Li, Yingqi, Shen, Yiyu, Chen, Chen, Leu, Ming C., & Tsai, Hai-Lung. Building metallic glass structures on crystalline metal substrates by laser-foil-printing additive manufacturing. United States. https://doi.org/10.1016/j.jmatprotec.2017.05.032
Li, Yingqi, Shen, Yiyu, Chen, Chen, Leu, Ming C., and Tsai, Hai-Lung. Fri . "Building metallic glass structures on crystalline metal substrates by laser-foil-printing additive manufacturing". United States. https://doi.org/10.1016/j.jmatprotec.2017.05.032. https://www.osti.gov/servlets/purl/1538466.
@article{osti_1538466,
title = {Building metallic glass structures on crystalline metal substrates by laser-foil-printing additive manufacturing},
author = {Li, Yingqi and Shen, Yiyu and Chen, Chen and Leu, Ming C. and Tsai, Hai-Lung},
abstractNote = {In laser-foil-printing additive manufacturing, 3D metallic glass structures can be built by laser welding of amorphous foils, layer by layer, upon a crystalline metal substrate. Here, in this paper, weldability studies for laser welding of Zr52.5Ti5Al10Ni14.6Cu17.9 amorphous foils onto a Ti-6Al-4V (Ti 6-4) or Zr 702 substrate are conducted. After laser welding, the weldments are analyzed using X-ray diffractometer, optical microscope, scanning electron microscope equipped with energy dispersive spectroscopy and micro-hardness tester. The results show that Zr 702 is a suitable substrate for Zr-based metallic glass structure since crack-free weld joints can be obtained owing to the formation of ductile α-Zr, while Ti 6-4 is not an appropriate substrate since it has high cracking susceptibility due to the formation of a large amount of hard and brittle intermetallics near the foil-substrate interface. It was found that the mixing between melted substrate and foil is not uniform but exhibits a distinct “swirl” pattern. The swirl structure is more pronounced in Ti 6-4 than in Zr 702 substrate which may contribute to its high cracking susceptibility. The aforementioned mixing leads to partial crystallization of the first amorphous layer; however, fully amorphous is achieved in the additional welding layers.},
doi = {10.1016/j.jmatprotec.2017.05.032},
journal = {Journal of Materials Processing Technology},
number = C,
volume = 248,
place = {United States},
year = {2017},
month = {5}
}

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Cited by: 32 works
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