Ultrahigh-temperature melt printing of multi-principal element alloys

Xizheng Wang, Yunhao Zhao, Gang Chen, Xinpeng Zhao, Chuan Liu, Soumya Sridar, Luis Fernando Ladinos Pizano, Shuke Li, Alexandra H. Brozena, Miao Guo, Hanlei Zhang, Yuankang Wang, Wei Xiong () and Liangbing Hu ()
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Xizheng Wang: University of Maryland
Yunhao Zhao: University of Pittsburgh
Gang Chen: University of Maryland
Xinpeng Zhao: University of Maryland
Chuan Liu: Northwestern University
Soumya Sridar: University of Pittsburgh
Luis Fernando Ladinos Pizano: University of Pittsburgh
Shuke Li: University of Maryland
Alexandra H. Brozena: University of Maryland
Miao Guo: University of Maryland
Hanlei Zhang: University of Pittsburgh
Yuankang Wang: University of Pittsburgh
Wei Xiong: University of Pittsburgh
Liangbing Hu: University of Maryland

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract Multi-principal element alloys (MPEA) demonstrate superior synergetic properties compared to single-element predominated traditional alloys. However, the rapid melting and uniform mixing of multi-elements for the fabrication of MPEA structural materials by metallic 3D printing is challenging as it is difficult to achieve both a high temperature and uniform temperature distribution in a sufficient heating source simultaneously. Herein, we report an ultrahigh-temperature melt printing method that can achieve rapid multi-elemental melting and uniform mixing for MPEA fabrication. In a typical fabrication process, multi-elemental metal powders are loaded into a high-temperature column zone that can be heated up to 3000 K via Joule heating, followed by melting on the order of milliseconds and mixing into homogenous alloys, which we attribute to the sufficiently uniform high-temperature heating zone. As proof-of-concept, we successfully fabricated single-phase bulk NiFeCrCo MPEA with uniform grain size. This ultrahigh-temperature rapid melt printing process provides excellent potential toward MPEA 3D printing.

Date: 2022
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DOI: 10.1038/s41467-022-34471-7

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