Microstructure and Mechanical Properties of Al-Cu-Mg Alloy Fabricated by Double-Wire CMT Arc Additive Manufacturing
The high cracking sensitivity of Al-Cu-Mg alloy limits its application in wire + arc additive manufacturing (WAAM). In this paper, a double-wire cold metal transfer (CMT) arc additive manufacturing system was applied. ER2319 and ER5183 wires were selected as feedstocks and a new type of high-strengt...
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MDPI AG
2022-02-01
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| Online Access: | https://www.mdpi.com/2075-4701/12/3/416 |
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| author | Siyue Fan Xinpeng Guo Yan Tang Xuming Guo |
| author_facet | Siyue Fan Xinpeng Guo Yan Tang Xuming Guo |
| author_sort | Siyue Fan |
| collection | DOAJ |
| description | The high cracking sensitivity of Al-Cu-Mg alloy limits its application in wire + arc additive manufacturing (WAAM). In this paper, a double-wire cold metal transfer (CMT) arc additive manufacturing system was applied. ER2319 and ER5183 wires were selected as feedstocks and a new type of high-strength, crack-free Al-Cu-Mg alloy was manufactured. T6 (solution and artificial aging) heat treatment was conducted to further improve the mechanical properties. The microstructure, the second phase, distribution of main alloy elements and fracture morphology of Al-Cu-Mg alloys in both as-deposited and T6 heat-treated conditions were analyzed by optical micrographs (OM), X-ray diffraction (XRD), and scanning electron microscopy (SEM), respectively. The micro-hardness and tensile properties of WAAM Al-Cu-Mg alloy in both as-deposited and T6 heat-treated conditions were tested. The results demonstrated that the microstructure of the as-deposited Al-Cu-Mg alloy was composed of short rod-shaped columnar grains, equiaxed grains in the inter-layer region, and coarsen equiaxed grains in the inner-layer region; most of the second phases were continuously distributed along the grain boundaries. After the T6 heat treatment, α(Al) grains became coarsened, most of second phases were dissolved, and the Cu and Mg elements were distributed homogeneously in the aluminum matrix. The micro-hardness and strength were significantly improved but the elongation was reduced. |
| first_indexed | 2024-03-09T13:20:10Z |
| format | Article |
| id | doaj.art-2eec963e81af4fa4aad21ba6aaa2b8d4 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T13:20:10Z |
| publishDate | 2022-02-01 |
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| spelling | doaj.art-2eec963e81af4fa4aad21ba6aaa2b8d42023-11-30T21:30:51ZengMDPI AGMetals2075-47012022-02-0112341610.3390/met12030416Microstructure and Mechanical Properties of Al-Cu-Mg Alloy Fabricated by Double-Wire CMT Arc Additive ManufacturingSiyue Fan0Xinpeng Guo1Yan Tang2Xuming Guo3School of Materials Science and Engineering, Shenyang Aerospace University, Shenyang 110136, ChinaSchool of Mechanical, Materials, and Mechatronics Engineering, Faculty of Engineering and Information Sciences, University of Wollongong, Northfield Ave, Wollongong, NSW 2500, AustraliaSchool of Materials Science and Engineering, Shenyang Aerospace University, Shenyang 110136, ChinaSchool of Materials Science and Engineering, Shenyang Aerospace University, Shenyang 110136, ChinaThe high cracking sensitivity of Al-Cu-Mg alloy limits its application in wire + arc additive manufacturing (WAAM). In this paper, a double-wire cold metal transfer (CMT) arc additive manufacturing system was applied. ER2319 and ER5183 wires were selected as feedstocks and a new type of high-strength, crack-free Al-Cu-Mg alloy was manufactured. T6 (solution and artificial aging) heat treatment was conducted to further improve the mechanical properties. The microstructure, the second phase, distribution of main alloy elements and fracture morphology of Al-Cu-Mg alloys in both as-deposited and T6 heat-treated conditions were analyzed by optical micrographs (OM), X-ray diffraction (XRD), and scanning electron microscopy (SEM), respectively. The micro-hardness and tensile properties of WAAM Al-Cu-Mg alloy in both as-deposited and T6 heat-treated conditions were tested. The results demonstrated that the microstructure of the as-deposited Al-Cu-Mg alloy was composed of short rod-shaped columnar grains, equiaxed grains in the inter-layer region, and coarsen equiaxed grains in the inner-layer region; most of the second phases were continuously distributed along the grain boundaries. After the T6 heat treatment, α(Al) grains became coarsened, most of second phases were dissolved, and the Cu and Mg elements were distributed homogeneously in the aluminum matrix. The micro-hardness and strength were significantly improved but the elongation was reduced.https://www.mdpi.com/2075-4701/12/3/416double-wire CMT arc additive manufacturingAl-Cu-Mg alloyheat treatmentmicrostructuremechanical property |
| spellingShingle | Siyue Fan Xinpeng Guo Yan Tang Xuming Guo Microstructure and Mechanical Properties of Al-Cu-Mg Alloy Fabricated by Double-Wire CMT Arc Additive Manufacturing Metals double-wire CMT arc additive manufacturing Al-Cu-Mg alloy heat treatment microstructure mechanical property |
| title | Microstructure and Mechanical Properties of Al-Cu-Mg Alloy Fabricated by Double-Wire CMT Arc Additive Manufacturing |
| title_full | Microstructure and Mechanical Properties of Al-Cu-Mg Alloy Fabricated by Double-Wire CMT Arc Additive Manufacturing |
| title_fullStr | Microstructure and Mechanical Properties of Al-Cu-Mg Alloy Fabricated by Double-Wire CMT Arc Additive Manufacturing |
| title_full_unstemmed | Microstructure and Mechanical Properties of Al-Cu-Mg Alloy Fabricated by Double-Wire CMT Arc Additive Manufacturing |
| title_short | Microstructure and Mechanical Properties of Al-Cu-Mg Alloy Fabricated by Double-Wire CMT Arc Additive Manufacturing |
| title_sort | microstructure and mechanical properties of al cu mg alloy fabricated by double wire cmt arc additive manufacturing |
| topic | double-wire CMT arc additive manufacturing Al-Cu-Mg alloy heat treatment microstructure mechanical property |
| url | https://www.mdpi.com/2075-4701/12/3/416 |
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