Microstructural Variations in Laser Powder Bed Fused Al–15%Fe Alloy at Intermediate Temperatures
The samples of the Al–15Fe (mass%) binary alloy that were additively manufactured by laser powder bed fusion (L-PBF) were exposed to intermediate temperatures (300 and 500 °C), and the thermally induced variations in their microstructural characteristics were investigated. The L-PBF-manufactured sam...
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MDPI AG
2022-06-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/13/4497 |
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| author | Wenyuan Wang Naoki Takata Asuka Suzuki Makoto Kobashi Masaki Kato |
| author_facet | Wenyuan Wang Naoki Takata Asuka Suzuki Makoto Kobashi Masaki Kato |
| author_sort | Wenyuan Wang |
| collection | DOAJ |
| description | The samples of the Al–15Fe (mass%) binary alloy that were additively manufactured by laser powder bed fusion (L-PBF) were exposed to intermediate temperatures (300 and 500 °C), and the thermally induced variations in their microstructural characteristics were investigated. The L-PBF-manufactured sample was found to have a microstructure comprising a stable θ-Al<sub>13</sub>Fe<sub>4</sub> phase localized around melt-pool boundaries and several spherical metastable Al<sub>6</sub>Fe-phase particles surrounded by a nanoscale α-Al/Al<sub>6</sub>Fe cellular structure in the melt pools. The morphology of the θ phase remained almost unchanged even after 1000 h of exposure at 300 °C. Moreover, the nanoscale α-Al/Al<sub>6</sub>Fe cellular structure dissolved in the α-Al matrix; this was followed by the growth (and nucleation) of the spherical Al<sub>6</sub>Fe-phase particles and the precipitation of the θ phase. Numerous equiaxed grains were formed in the α-Al matrix during the thermal exposure, which led to the formation of a relatively homogenous microstructure. The variations in these microstructural characteristics were more pronounced at the higher investigated temperature of 500 °C. |
| first_indexed | 2024-03-09T04:03:33Z |
| format | Article |
| id | doaj.art-5fa6d42d96fc4ee0848153fe28d957b6 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T04:03:33Z |
| publishDate | 2022-06-01 |
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| spelling | doaj.art-5fa6d42d96fc4ee0848153fe28d957b62023-12-03T14:10:07ZengMDPI AGMaterials1996-19442022-06-011513449710.3390/ma15134497Microstructural Variations in Laser Powder Bed Fused Al–15%Fe Alloy at Intermediate TemperaturesWenyuan Wang0Naoki Takata1Asuka Suzuki2Makoto Kobashi3Masaki Kato4Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, JapanDepartment of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, JapanDepartment of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, JapanDepartment of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, JapanAichi Center for Industry and Science Technology, 1267-1 Akiai, Yakusa-cho, Toyota 470-0356, JapanThe samples of the Al–15Fe (mass%) binary alloy that were additively manufactured by laser powder bed fusion (L-PBF) were exposed to intermediate temperatures (300 and 500 °C), and the thermally induced variations in their microstructural characteristics were investigated. The L-PBF-manufactured sample was found to have a microstructure comprising a stable θ-Al<sub>13</sub>Fe<sub>4</sub> phase localized around melt-pool boundaries and several spherical metastable Al<sub>6</sub>Fe-phase particles surrounded by a nanoscale α-Al/Al<sub>6</sub>Fe cellular structure in the melt pools. The morphology of the θ phase remained almost unchanged even after 1000 h of exposure at 300 °C. Moreover, the nanoscale α-Al/Al<sub>6</sub>Fe cellular structure dissolved in the α-Al matrix; this was followed by the growth (and nucleation) of the spherical Al<sub>6</sub>Fe-phase particles and the precipitation of the θ phase. Numerous equiaxed grains were formed in the α-Al matrix during the thermal exposure, which led to the formation of a relatively homogenous microstructure. The variations in these microstructural characteristics were more pronounced at the higher investigated temperature of 500 °C.https://www.mdpi.com/1996-1944/15/13/4497additive manufacturingaluminum alloysmicrostructureintermetallicsthermal exposure |
| spellingShingle | Wenyuan Wang Naoki Takata Asuka Suzuki Makoto Kobashi Masaki Kato Microstructural Variations in Laser Powder Bed Fused Al–15%Fe Alloy at Intermediate Temperatures Materials additive manufacturing aluminum alloys microstructure intermetallics thermal exposure |
| title | Microstructural Variations in Laser Powder Bed Fused Al–15%Fe Alloy at Intermediate Temperatures |
| title_full | Microstructural Variations in Laser Powder Bed Fused Al–15%Fe Alloy at Intermediate Temperatures |
| title_fullStr | Microstructural Variations in Laser Powder Bed Fused Al–15%Fe Alloy at Intermediate Temperatures |
| title_full_unstemmed | Microstructural Variations in Laser Powder Bed Fused Al–15%Fe Alloy at Intermediate Temperatures |
| title_short | Microstructural Variations in Laser Powder Bed Fused Al–15%Fe Alloy at Intermediate Temperatures |
| title_sort | microstructural variations in laser powder bed fused al 15 fe alloy at intermediate temperatures |
| topic | additive manufacturing aluminum alloys microstructure intermetallics thermal exposure |
| url | https://www.mdpi.com/1996-1944/15/13/4497 |
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