Study on forming process and microstructure of FeCrAl-ODS alloy by selective laser melting

Shenghua Zhang; Fudong Li; Yu Wang; Zhonghua Li; Senming Zhang; Yen-Ling Kuo; Peikang Bai; Bin Liu

Journal of Materials Research and Technology (Mar 2025)

Study on forming process and microstructure of FeCrAl-ODS alloy by selective laser melting

Shenghua Zhang,
Fudong Li,
Yu Wang,
Zhonghua Li,
Senming Zhang,
Yen-Ling Kuo,
Peikang Bai,
Bin Liu

Affiliations

Shenghua Zhang: Shanxi Key Laboratory of Controlled Metal Solidification and Precision Manufacturing, School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Corresponding author.
Fudong Li: Shanxi Key Laboratory of Controlled Metal Solidification and Precision Manufacturing, School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China
Yu Wang: Shanxi Key Laboratory of Controlled Metal Solidification and Precision Manufacturing, School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China
Zhonghua Li: School of Mechanical Engineering, North University of China, Taiyuan, 030051, PR China
Senming Zhang: Shanxi Key Laboratory of Controlled Metal Solidification and Precision Manufacturing, School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China
Yen-Ling Kuo: Department of Mechanical Engineering, Nagaoka University of Technology, Nagaoka, Japan
Peikang Bai: Shanxi Key Laboratory of Controlled Metal Solidification and Precision Manufacturing, School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Taiyuan University of Science and Technology, Taiyuan 030024, PR China
Bin Liu: Shanxi Key Laboratory of Controlled Metal Solidification and Precision Manufacturing, School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China

Journal volume & issue: Vol. 35
pp. 1369 – 1376

Abstract

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Powder preparation, forming process, microstructure, oxide particles, and precipitates of FeCrAl-ODS (Oxide Dispersion Strengthened) alloy fabricated by Selective Laser Melting (SLM) were systematically studied in this paper. Results indicate that after adding 0.1 wt% Y₂O₃ via ball milling, the formed samples showed fewer defects and a 20 HV increase in hardness under the same parameters. The optimal process parameters were: laser power 250 W, scanning speed 900 mm/s, and hatch spacing 0.09 mm. The longitudinal section of the SLM-formed FeCrAl-ODS alloy exhibited a typical molten pool structure with a layered distribution characteristic of SLM-formed alloys. A higher laser coupling efficiency and melt pool temperature led to a lower proportion of subgrains composed of low-angle grain boundaries in the FeCrAl-ODS alloy. Independent α′ phase (Cr-rich phase) and α′ phase attached to Y₂O₃ were observed in the SLM-formed FeCrAl-ODS alloy. Thess results are of great significance for developing ODS alloys fabricated via additive manufacturing.

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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