Regulating strength and ductility of gradient-structured Cu–Al–Zn via SMAT and annealing
For most metallic materials, the surface mechanical attrition treatment (SMAT) resulted in a substantial increase in the yield strength, but accompanied by a certain decrease in the ductility. However, the regulating of the yield strength and ductility in the gradient-structured Cu–Al–Zn alloys by t...
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2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424029181 |
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| author | Zhilin Wu Baozhuang Cai Yunhua Bai Shuwie Quan Xingfu Li Cong Li Tabasum Huma Yulan Gong Lele Sun Hongjiang Pan Zhilong Tan Xinkun Zhu |
| author_facet | Zhilin Wu Baozhuang Cai Yunhua Bai Shuwie Quan Xingfu Li Cong Li Tabasum Huma Yulan Gong Lele Sun Hongjiang Pan Zhilong Tan Xinkun Zhu |
| author_sort | Zhilin Wu |
| collection | DOAJ |
| description | For most metallic materials, the surface mechanical attrition treatment (SMAT) resulted in a substantial increase in the yield strength, but accompanied by a certain decrease in the ductility. However, the regulating of the yield strength and ductility in the gradient-structured Cu–Al–Zn alloys by the SMAT and annealing was less studied systematically. In this study, the microstructural evolution and mechanical properties of gradient-structured Cu–Al–Zn alloys with different stacking fault energy (SFE) after annealing were systematically investigated. The tensile properties show that the SMAT Cu–Al–Zn alloys with low SFE after annealing at 320 °C for 20 min exhibits a superior combination of strength and ductility. The microstructure characterizes reveal that the density of dislocations is decreased in the SMAT Cu–Al–Zn alloys with low SFE after annealing, meanwhile the degree of accumulated dislocations on the deformed twins is also weakened and maintains deformation twins feature, which thus achieve a superior balance of yield strength and ductility. Further analysis demonstrates that the annealed SMAT Cu–Al–Zn alloy with low SFE still maintains an obvious HDI strengthening. Furthermore, the digital image correlation (DIC) results indicate that during tensile deformation, gradient-structured Cu–Al–Zn alloys with low SFE can form dispersed strain bands, which contributes to improved ductility. This study provides a feasible strategy for regulating the strength and ductility of gradient-structured copper alloys. |
| format | Article |
| id | doaj-art-972015bda2174cee94795b6e245bdd24 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-972015bda2174cee94795b6e245bdd242025-01-19T06:25:31ZengElsevierJournal of Materials Research and Technology2238-78542025-01-0134703715Regulating strength and ductility of gradient-structured Cu–Al–Zn via SMAT and annealingZhilin Wu0Baozhuang Cai1Yunhua Bai2Shuwie Quan3Xingfu Li4Cong Li5Tabasum Huma6Yulan Gong7Lele Sun8Hongjiang Pan9Zhilong Tan10Xinkun Zhu11Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaTianjin Product Quality Inspection Technology Research Institute Technology Research Centre, Tianjin, ChinaFaculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaFaculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaFaculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaFaculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaFaculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaFaculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaFaculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaFaculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaKunming Institute of Precious Metals, Kunming, 650106, ChinaFaculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China; Corresponding author.For most metallic materials, the surface mechanical attrition treatment (SMAT) resulted in a substantial increase in the yield strength, but accompanied by a certain decrease in the ductility. However, the regulating of the yield strength and ductility in the gradient-structured Cu–Al–Zn alloys by the SMAT and annealing was less studied systematically. In this study, the microstructural evolution and mechanical properties of gradient-structured Cu–Al–Zn alloys with different stacking fault energy (SFE) after annealing were systematically investigated. The tensile properties show that the SMAT Cu–Al–Zn alloys with low SFE after annealing at 320 °C for 20 min exhibits a superior combination of strength and ductility. The microstructure characterizes reveal that the density of dislocations is decreased in the SMAT Cu–Al–Zn alloys with low SFE after annealing, meanwhile the degree of accumulated dislocations on the deformed twins is also weakened and maintains deformation twins feature, which thus achieve a superior balance of yield strength and ductility. Further analysis demonstrates that the annealed SMAT Cu–Al–Zn alloy with low SFE still maintains an obvious HDI strengthening. Furthermore, the digital image correlation (DIC) results indicate that during tensile deformation, gradient-structured Cu–Al–Zn alloys with low SFE can form dispersed strain bands, which contributes to improved ductility. This study provides a feasible strategy for regulating the strength and ductility of gradient-structured copper alloys.http://www.sciencedirect.com/science/article/pii/S2238785424029181Cu-Al-Zn alloysSMATGradient structureAnnealingStrengthDuctility |
| spellingShingle | Zhilin Wu Baozhuang Cai Yunhua Bai Shuwie Quan Xingfu Li Cong Li Tabasum Huma Yulan Gong Lele Sun Hongjiang Pan Zhilong Tan Xinkun Zhu Regulating strength and ductility of gradient-structured Cu–Al–Zn via SMAT and annealing Journal of Materials Research and Technology Cu-Al-Zn alloys SMAT Gradient structure Annealing Strength Ductility |
| title | Regulating strength and ductility of gradient-structured Cu–Al–Zn via SMAT and annealing |
| title_full | Regulating strength and ductility of gradient-structured Cu–Al–Zn via SMAT and annealing |
| title_fullStr | Regulating strength and ductility of gradient-structured Cu–Al–Zn via SMAT and annealing |
| title_full_unstemmed | Regulating strength and ductility of gradient-structured Cu–Al–Zn via SMAT and annealing |
| title_short | Regulating strength and ductility of gradient-structured Cu–Al–Zn via SMAT and annealing |
| title_sort | regulating strength and ductility of gradient structured cu al zn via smat and annealing |
| topic | Cu-Al-Zn alloys SMAT Gradient structure Annealing Strength Ductility |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424029181 |
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