Microstructure and mechanical properties of AlCoCrFeMnNi HEAs fabricated by selective laser melting

Pan Ma; Yacheng Fang; Shuimiao Wei; Zhiyu Zhang; Hong Yang; Shiguang Wan; Konda Gokuldoss Prashanth; Yandong Jia

Journal of Materials Research and Technology (Jul 2023)

Microstructure and mechanical properties of AlCoCrFeMnNi HEAs fabricated by selective laser melting

Pan Ma,
Yacheng Fang,
Shuimiao Wei,
Zhiyu Zhang,
Hong Yang,
Shiguang Wan,
Konda Gokuldoss Prashanth,
Yandong Jia

Affiliations

Pan Ma: School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China; Corresponding author. School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai, China.
Yacheng Fang: School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai, China
Shuimiao Wei: School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai, China
Zhiyu Zhang: School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai, China
Hong Yang: School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai, China
Shiguang Wan: School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai, China
Konda Gokuldoss Prashanth: Department of Mechanical and Industrial Engineering, Tallinn University of Technology, Ehitajate Tee 5, 19086 Tallinn, Estonia; CBCMT, School of Mechanical Engineering, Vellore Institute of Technology, Vellore, 630014 Tamil Nadu, India
Yandong Jia: Laboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai 200444, China

Journal volume & issue: Vol. 25
pp. 7090 – 7100

Abstract

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To avoid the formation of cracks and to improve the forming capability and performance of the AlCoCrFeNi high entropy alloy (HEA), equiatomic CoCrFeNiMn HEA was added into equiatomic AlCoCrFeNi HEA to form a novel AlCoCrFeMnNi HEA. Three different compositions were prepared by the selective laser melting (SLM) technique, and their formability, microstructure, and mechanical properties were analyzed. Results revealed that AlCoCrFeMnNi shows a composite-like dual-phase structure composed of a soft FCC phase and hard BCC (A2/B2) phase. With the decrease of Al, the SLM forming capability is improved. Besides, the volume fraction of the phase and the nano-hardness decreases with decreasing Al content.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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