Microstructure evolution and mechanical properties of ZK61 magnesium alloy fabricated via friction stir additive manufacturing
Friction stir additive manufacturing (FSAM) is a novel solid-phase AM method which enables AM of Mg alloy components to achieve excellent mechanical properties. In this study, a high-strength laminated block of ZK61 Mg alloy was fabricated by the FSAM process. The microstructure evolution and mechan...
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Elsevier
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/S2238785424029569 |
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| author | Yichen Xiao Lei Shi Chuansong Wu Shengli Li Ji Chen Wenjian Ren |
| author_facet | Yichen Xiao Lei Shi Chuansong Wu Shengli Li Ji Chen Wenjian Ren |
| author_sort | Yichen Xiao |
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| description | Friction stir additive manufacturing (FSAM) is a novel solid-phase AM method which enables AM of Mg alloy components to achieve excellent mechanical properties. In this study, a high-strength laminated block of ZK61 Mg alloy was fabricated by the FSAM process. The microstructure evolution and mechanical properties were comprehensively studied. The microstructure in the additive zone of the Mg alloy component prepared by FSAM shows uniform and fine equiaxed grains with a size range of 2–6 μm. In the direction parallel to the traverse direction, a strong {0001} basal texture is formed. Microstructural studies were conducted respectively on the primary stirring zone (SZ), re-SZ, and reheating zone in the SZ. It is found that the degree of dynamic recrystallization in the secondary stirring region is more intense which can effectively refine the grains uniformly. The stratified tensile results show that the average ultimate tensile strength (UTS) of the uppermost additive zone can reach 320 MPa, exceeding the UTS of the base materials, which is 275 MPa. The UTS of the FSAM component in the horizontal direction can reach 265 MPa. Nevertheless, due to the high texture strength and increased anisotropy of the product, the average tensile strength in the building direction only reach 40% of that in the horizontal direction. The microhardness of the SZ is between 55 and 70 HV, slightly less than the hardness of the base metal. It reveals FSAM process is a promising method for AM of ZK61 Mg alloy. |
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| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-4dcdb1e9f1c14bcd933e14ac7e31426e2025-01-19T06:25:39ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013413791390Microstructure evolution and mechanical properties of ZK61 magnesium alloy fabricated via friction stir additive manufacturingYichen Xiao0Lei Shi1Chuansong Wu2Shengli Li3Ji Chen4Wenjian Ren5MOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing, Institute of Materials Joining, Shandong University, Jinan, 250061, ChinaMOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing, Institute of Materials Joining, Shandong University, Jinan, 250061, China; Shandong University-Weihai Research Institute of Industrial Technology, Weihai, 264209, China; Corresponding author. MOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing, Institute of Materials Joining, Shandong University, Jinan, 250061, China.MOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing, Institute of Materials Joining, Shandong University, Jinan, 250061, China; Shandong University-Weihai Research Institute of Industrial Technology, Weihai, 264209, ChinaMOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing, Institute of Materials Joining, Shandong University, Jinan, 250061, ChinaMOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing, Institute of Materials Joining, Shandong University, Jinan, 250061, China; Shandong University-Weihai Research Institute of Industrial Technology, Weihai, 264209, ChinaShandong Aotai Electric Co., Ltd., Jinan, 250101, ChinaFriction stir additive manufacturing (FSAM) is a novel solid-phase AM method which enables AM of Mg alloy components to achieve excellent mechanical properties. In this study, a high-strength laminated block of ZK61 Mg alloy was fabricated by the FSAM process. The microstructure evolution and mechanical properties were comprehensively studied. The microstructure in the additive zone of the Mg alloy component prepared by FSAM shows uniform and fine equiaxed grains with a size range of 2–6 μm. In the direction parallel to the traverse direction, a strong {0001} basal texture is formed. Microstructural studies were conducted respectively on the primary stirring zone (SZ), re-SZ, and reheating zone in the SZ. It is found that the degree of dynamic recrystallization in the secondary stirring region is more intense which can effectively refine the grains uniformly. The stratified tensile results show that the average ultimate tensile strength (UTS) of the uppermost additive zone can reach 320 MPa, exceeding the UTS of the base materials, which is 275 MPa. The UTS of the FSAM component in the horizontal direction can reach 265 MPa. Nevertheless, due to the high texture strength and increased anisotropy of the product, the average tensile strength in the building direction only reach 40% of that in the horizontal direction. The microhardness of the SZ is between 55 and 70 HV, slightly less than the hardness of the base metal. It reveals FSAM process is a promising method for AM of ZK61 Mg alloy.http://www.sciencedirect.com/science/article/pii/S2238785424029569ZK61 magnesium alloyFriction stir additive manufacturingGrain sizeMechanical propertyTexture |
| spellingShingle | Yichen Xiao Lei Shi Chuansong Wu Shengli Li Ji Chen Wenjian Ren Microstructure evolution and mechanical properties of ZK61 magnesium alloy fabricated via friction stir additive manufacturing Journal of Materials Research and Technology ZK61 magnesium alloy Friction stir additive manufacturing Grain size Mechanical property Texture |
| title | Microstructure evolution and mechanical properties of ZK61 magnesium alloy fabricated via friction stir additive manufacturing |
| title_full | Microstructure evolution and mechanical properties of ZK61 magnesium alloy fabricated via friction stir additive manufacturing |
| title_fullStr | Microstructure evolution and mechanical properties of ZK61 magnesium alloy fabricated via friction stir additive manufacturing |
| title_full_unstemmed | Microstructure evolution and mechanical properties of ZK61 magnesium alloy fabricated via friction stir additive manufacturing |
| title_short | Microstructure evolution and mechanical properties of ZK61 magnesium alloy fabricated via friction stir additive manufacturing |
| title_sort | microstructure evolution and mechanical properties of zk61 magnesium alloy fabricated via friction stir additive manufacturing |
| topic | ZK61 magnesium alloy Friction stir additive manufacturing Grain size Mechanical property Texture |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424029569 |
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