Hierarchical microstructure of laser powder bed fusion produced face-centered-cubic-structured equiatomic CrFeNiMn multicomponent alloy
Loading...
Access rights
openAccess
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2020-10-02
Major/Subject
Mcode
Degree programme
Language
en
Pages
11
1-11
1-11
Series
Materials, Volume 13, issue 20
Abstract
A cobalt-free equiatomic CrFeNiMn multicomponent alloy was fabricated from gas-atomized powder using laser powder bed fusion (L-PBF), also known as selective laser melting (SLM). The as-built specimens had a single face-centered cubic (FCC) structure, relative density of 98%, and hardness up to 248 HV0.5 for both the scanning speeds applied. In this work, we report the hierarchical microstructural features observed in the as-built specimens. These are comprised of melt pools, grains, cell structures including dendritic cells, elongated cells, equiaxed cells (~500 nm), and sub-cells (150–300 nm). The cell and sub-cell walls are composed of a notably high density of dislocations. In addition, segregation of Mn and Ni was detected at the cell walls, but only occasionally at the sub-cell walls. SLM exhibits the capability to produce FCC-structured equiatomic CrFeNiMn multicomponent alloy with the refined and hierarchical microstructure.Description
Keywords
High-entropy alloys, Laser powder bed fusion, Selective laser melting, Solidification microstructure
Other note
Citation
Yang, X, Ge, Y, Lehtonen, J & Hannula, S P 2020, ' Hierarchical microstructure of laser powder bed fusion produced face-centered-cubic-structured equiatomic CrFeNiMn multicomponent alloy ', Materials, vol. 13, no. 20, 4498, pp. 1-11 . https://doi.org/10.3390/ma13204498