Microstructure and heat resistance of Al–Cu–Mg–Ag alloy fabricated by wire-arc directed energy deposition
A new type of Al–Cu–Mg–Ag heat-resistant aluminum alloy feed wire was self-developed (named 205B) and was use to prepare a thin-walled structure by wire-arc directed energy deposition (WA-DED) method. Fine equiaxed grains with an average grain size of 18.2 μm were obtained in the WA-DED 205B alloy,...
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Elsevier
2025-07-01
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| Series: | Journal of Materials Research and Technology |
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| author | D.P. Shi H. Huang B.B. Wang X.P. Guo R.Z. Xu X.M. Guo P. Xue D.R. Ni Z.Y. Ma |
| author_facet | D.P. Shi H. Huang B.B. Wang X.P. Guo R.Z. Xu X.M. Guo P. Xue D.R. Ni Z.Y. Ma |
| author_sort | D.P. Shi |
| collection | DOAJ |
| description | A new type of Al–Cu–Mg–Ag heat-resistant aluminum alloy feed wire was self-developed (named 205B) and was use to prepare a thin-walled structure by wire-arc directed energy deposition (WA-DED) method. Fine equiaxed grains with an average grain size of 18.2 μm were obtained in the WA-DED 205B alloy, and significantly grew to 32.7 μm after T6 heat treatment. Meanwhile, high density of nano-scale Ω phases precipitated in the grains of 205B-T6 sample instead of the θ′ phases in traditional WA-DED 205A-T6 alloy. The segregation of Ag and Mg atoms at the Ω phase interface was observed, which is beneficial to the thermal stability of the precipitated phases. Though the θ′ phase began to grow at 200 °C, no obvious growth was found in the Ω phase till the temperature increased to 250 °C. Therefore, excellent high temperature tensile properties were achieved in the WA-DED 205B sample, the ultimate tensile strength (UTS) was as high as 417 MPa together with a high elongation of 9.7 % at the temperature of 200 °C. At a higher temperature of 250 °C, the UTS decreased to 370 MPa, but still larger than that of the 205A sample at 200 °C (356 MPa). Obviously, the service temperature can be improved at least 50 °C in this new WA-DED 205B alloy compared to the traditional heat-resistant 205A alloy. This study provides an effective method to prepare high performance WA-DED heat-resistant aluminum alloys which can be widely used in the short process rapid manufacture of aerospace field. |
| format | Article |
| id | doaj-art-4dfe15cd80e349899c6fdd95bda9f5c7 |
| institution | DOAJ |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-4dfe15cd80e349899c6fdd95bda9f5c72025-08-20T03:07:51ZengElsevierJournal of Materials Research and Technology2238-78542025-07-0137122410.1016/j.jmrt.2025.05.248Microstructure and heat resistance of Al–Cu–Mg–Ag alloy fabricated by wire-arc directed energy depositionD.P. Shi0H. Huang1B.B. Wang2X.P. Guo3R.Z. Xu4X.M. Guo5P. Xue6D.R. Ni7Z.Y. Ma8College of Material Science and Engineering, Shenyang Aerospace University, Shenyang, 110136, China; Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, ChinaFaculty of Engineering, Monash University, Clayton Campus, Victoria, 3800, AustraliaShi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, ChinaSchool of Mechanical, Materials, and Mechatronics and Biomedical Engineering, University of Wollongong, Wollongong, NSW, 2522, Australia; Corresponding author.College of Material Science and Engineering, Shenyang Aerospace University, Shenyang, 110136, ChinaCollege of Material Science and Engineering, Shenyang Aerospace University, Shenyang, 110136, ChinaShi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China; Corresponding author.Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, ChinaShi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, ChinaA new type of Al–Cu–Mg–Ag heat-resistant aluminum alloy feed wire was self-developed (named 205B) and was use to prepare a thin-walled structure by wire-arc directed energy deposition (WA-DED) method. Fine equiaxed grains with an average grain size of 18.2 μm were obtained in the WA-DED 205B alloy, and significantly grew to 32.7 μm after T6 heat treatment. Meanwhile, high density of nano-scale Ω phases precipitated in the grains of 205B-T6 sample instead of the θ′ phases in traditional WA-DED 205A-T6 alloy. The segregation of Ag and Mg atoms at the Ω phase interface was observed, which is beneficial to the thermal stability of the precipitated phases. Though the θ′ phase began to grow at 200 °C, no obvious growth was found in the Ω phase till the temperature increased to 250 °C. Therefore, excellent high temperature tensile properties were achieved in the WA-DED 205B sample, the ultimate tensile strength (UTS) was as high as 417 MPa together with a high elongation of 9.7 % at the temperature of 200 °C. At a higher temperature of 250 °C, the UTS decreased to 370 MPa, but still larger than that of the 205A sample at 200 °C (356 MPa). Obviously, the service temperature can be improved at least 50 °C in this new WA-DED 205B alloy compared to the traditional heat-resistant 205A alloy. This study provides an effective method to prepare high performance WA-DED heat-resistant aluminum alloys which can be widely used in the short process rapid manufacture of aerospace field.http://www.sciencedirect.com/science/article/pii/S2238785425014048Wire-arc directed energy depositionHeat-resistant aluminum alloyHigh temperatureMicrostructureMechanical property |
| spellingShingle | D.P. Shi H. Huang B.B. Wang X.P. Guo R.Z. Xu X.M. Guo P. Xue D.R. Ni Z.Y. Ma Microstructure and heat resistance of Al–Cu–Mg–Ag alloy fabricated by wire-arc directed energy deposition Journal of Materials Research and Technology Wire-arc directed energy deposition Heat-resistant aluminum alloy High temperature Microstructure Mechanical property |
| title | Microstructure and heat resistance of Al–Cu–Mg–Ag alloy fabricated by wire-arc directed energy deposition |
| title_full | Microstructure and heat resistance of Al–Cu–Mg–Ag alloy fabricated by wire-arc directed energy deposition |
| title_fullStr | Microstructure and heat resistance of Al–Cu–Mg–Ag alloy fabricated by wire-arc directed energy deposition |
| title_full_unstemmed | Microstructure and heat resistance of Al–Cu–Mg–Ag alloy fabricated by wire-arc directed energy deposition |
| title_short | Microstructure and heat resistance of Al–Cu–Mg–Ag alloy fabricated by wire-arc directed energy deposition |
| title_sort | microstructure and heat resistance of al cu mg ag alloy fabricated by wire arc directed energy deposition |
| topic | Wire-arc directed energy deposition Heat-resistant aluminum alloy High temperature Microstructure Mechanical property |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425014048 |
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