Influence of the microstructure on mechanical properties of SLM additive manufacturing Fe-based bulk metallic glasses

Jiang, Q. and Zhang, P. and Tan, J. and Yu, Z. and Tian, Y. and Ma, S. and Wu, D. (2022) Influence of the microstructure on mechanical properties of SLM additive manufacturing Fe-based bulk metallic glasses. Journal of Alloys and Compounds, 894: 162525. ISSN 0925-8388

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Abstract

Fe-based bulk metallic glass (BMG)(FeCrMoWMnSiBC) was produced by selective laser melting (SLM) successfully in this study. The best parameters were determined through extensive experiments. The relative density (95%) and amorphous rate (95.47%) samples were obtained by this parameter. The analysis of the microstructure reveals that the crystalline phases in the heat affected zone (HAZ) are mainly α-Fe and M23(CB)6 phases, and co-exist with the amorphous phases. The Heat treatment is employed to study the crystallization behavior of amorphous phases. The α-Fe phase, as the primary phase, grows into a submicron crystal phase under the action of multiple thermal cycles. Nanoindentation test results show that the hardness of the amorphous phase is higher than that of the nano-grain region, and the hardness of the nanocrystalline region is higher than that of the submicron-grain region. The free volume content is different and the amorphous phase is not uniform due to the complex thermal cycle. The maximum hardness occurs in the amorphous phase with 22.6 GPa.

Item Type:

Journal Article

Journal or Publication Title:

Journal of Alloys and Compounds

Additional Information:

This is the author’s version of a work that was accepted for publication in Journal of Alloys and Compounds. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Alloys and Compounds, 894, 2021 DOI: 10.1016/j.jallcom.2021.162525

Uncontrolled Keywords:

/dk/atira/pure/subjectarea/asjc/2500/2505

Subjects:

?? annealingbulk metallic glasscrystallizationselective laser meltingchromium compoundshardnessheat affected zoneiron compoundslead compoundsmanganese compoundsmeltingmetallic glassmicrostructurenanocrystalssilicon compoundsthermal cyclingamorphous phasiscry ??

Departments:

Faculty of Science and Technology > Engineering

ID Code:

162381

Deposited By:

ep_importer_pure

Deposited On:

19 Nov 2021 12:09

Refereed?:

Yes

Published?:

Published