Laser additively manufactured crack-free aluminum-bearing high entropy alloys: alloy design, synthesis, cracking inhibition and microstructure evolution effects on their tensile properties
Developing high-performance high-entropy alloys (HEAs) fabricated by laser additive manufacturing (LAM) is the pursuit of the metallic community. In the present work, we designed a series of [(Al6-xNbx)-(FeCoNi)12]Cr3 HEA compositions using a high-entropy alloying strategy based on a cluster-plus-gl...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2023-12-01
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| Series: | Virtual and Physical Prototyping |
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| Online Access: | http://dx.doi.org/10.1080/17452759.2023.2250771 |
| _version_ | 1827811244427444224 |
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| author | Jiawang Wu Yaxiong Guo Fangping Wang Xiaojuan Shang Jing Zhang Qibin Liu |
| author_facet | Jiawang Wu Yaxiong Guo Fangping Wang Xiaojuan Shang Jing Zhang Qibin Liu |
| author_sort | Jiawang Wu |
| collection | DOAJ |
| description | Developing high-performance high-entropy alloys (HEAs) fabricated by laser additive manufacturing (LAM) is the pursuit of the metallic community. In the present work, we designed a series of [(Al6-xNbx)-(FeCoNi)12]Cr3 HEA compositions using a high-entropy alloying strategy based on a cluster-plus-glue-atom model. And their thin-wall-sharped bulks were fabricated by LAM and post-aging treatment. The effects of cracking inhibition and microstructure evolution on the tensile properties were researched in detail. The results show that as the Nb substitutes for Al atoms, the cracking behaviour is ameliorated, ascribed to the tiny Laves phase refined the dendrite spacings and back-filled in the inter-dendritic liquid film. Also, introducing Nb atoms improves the strength but deteriorates the ductility. Significantly, the Nb4 HEA possesses the best tensile-property combination (i.e. σs ∼ 419.2 MPa, σb ∼ 787.4 MPa, and δ ∼ 15.5%) with a strain mechanism of dislocation slip mode. After post-aging for 72 h, the microstructure comprises fully recrystallized equiaxed FCC grains and many tiny needle-like D019 precipitates, leading to high strength and sufficient ductility (i.e. σ0.2 ∼ 535.9 MPa, σb ∼820 MPa and δ value of 8.9%). These findings provide a new paradigm for the LAM of crack-free HEAs with excellent mechanical properties. |
| first_indexed | 2024-03-11T23:03:09Z |
| format | Article |
| id | doaj.art-fb940da215a74df1b34a7907d43b7d7a |
| institution | Directory Open Access Journal |
| issn | 1745-2759 1745-2767 |
| language | English |
| last_indexed | 2024-03-11T23:03:09Z |
| publishDate | 2023-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Virtual and Physical Prototyping |
| spelling | doaj.art-fb940da215a74df1b34a7907d43b7d7a2023-09-21T14:38:04ZengTaylor & Francis GroupVirtual and Physical Prototyping1745-27591745-27672023-12-0118110.1080/17452759.2023.22507712250771Laser additively manufactured crack-free aluminum-bearing high entropy alloys: alloy design, synthesis, cracking inhibition and microstructure evolution effects on their tensile propertiesJiawang Wu0Yaxiong Guo1Fangping Wang2Xiaojuan Shang3Jing Zhang4Qibin Liu5College of Materials and MetallurgyCollege of Materials and MetallurgyCollege of Materials and MetallurgyCollege of Materials and MetallurgyCollege of Materials and MetallurgyCollege of Materials and MetallurgyDeveloping high-performance high-entropy alloys (HEAs) fabricated by laser additive manufacturing (LAM) is the pursuit of the metallic community. In the present work, we designed a series of [(Al6-xNbx)-(FeCoNi)12]Cr3 HEA compositions using a high-entropy alloying strategy based on a cluster-plus-glue-atom model. And their thin-wall-sharped bulks were fabricated by LAM and post-aging treatment. The effects of cracking inhibition and microstructure evolution on the tensile properties were researched in detail. The results show that as the Nb substitutes for Al atoms, the cracking behaviour is ameliorated, ascribed to the tiny Laves phase refined the dendrite spacings and back-filled in the inter-dendritic liquid film. Also, introducing Nb atoms improves the strength but deteriorates the ductility. Significantly, the Nb4 HEA possesses the best tensile-property combination (i.e. σs ∼ 419.2 MPa, σb ∼ 787.4 MPa, and δ ∼ 15.5%) with a strain mechanism of dislocation slip mode. After post-aging for 72 h, the microstructure comprises fully recrystallized equiaxed FCC grains and many tiny needle-like D019 precipitates, leading to high strength and sufficient ductility (i.e. σ0.2 ∼ 535.9 MPa, σb ∼820 MPa and δ value of 8.9%). These findings provide a new paradigm for the LAM of crack-free HEAs with excellent mechanical properties.http://dx.doi.org/10.1080/17452759.2023.2250771high-entropy alloyingcracking inhibitionlaser additive manufactured019 precipitatespost-aging treatment |
| spellingShingle | Jiawang Wu Yaxiong Guo Fangping Wang Xiaojuan Shang Jing Zhang Qibin Liu Laser additively manufactured crack-free aluminum-bearing high entropy alloys: alloy design, synthesis, cracking inhibition and microstructure evolution effects on their tensile properties Virtual and Physical Prototyping high-entropy alloying cracking inhibition laser additive manufacture d019 precipitates post-aging treatment |
| title | Laser additively manufactured crack-free aluminum-bearing high entropy alloys: alloy design, synthesis, cracking inhibition and microstructure evolution effects on their tensile properties |
| title_full | Laser additively manufactured crack-free aluminum-bearing high entropy alloys: alloy design, synthesis, cracking inhibition and microstructure evolution effects on their tensile properties |
| title_fullStr | Laser additively manufactured crack-free aluminum-bearing high entropy alloys: alloy design, synthesis, cracking inhibition and microstructure evolution effects on their tensile properties |
| title_full_unstemmed | Laser additively manufactured crack-free aluminum-bearing high entropy alloys: alloy design, synthesis, cracking inhibition and microstructure evolution effects on their tensile properties |
| title_short | Laser additively manufactured crack-free aluminum-bearing high entropy alloys: alloy design, synthesis, cracking inhibition and microstructure evolution effects on their tensile properties |
| title_sort | laser additively manufactured crack free aluminum bearing high entropy alloys alloy design synthesis cracking inhibition and microstructure evolution effects on their tensile properties |
| topic | high-entropy alloying cracking inhibition laser additive manufacture d019 precipitates post-aging treatment |
| url | http://dx.doi.org/10.1080/17452759.2023.2250771 |
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