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Microstructure and Mechanical Properties of 5356 Aluminum Alloy Fabricated by TIG Arc Additive Manufacturing
Sun Jiaxiao1; Yang Ke1; Wang Qiuyu1; Ji Shanlin1; Bao Yefeng1; Pan Jie2
Corresponding AuthorYang Ke(yangke_hhuc@126.com)
2021-05-01
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume57Issue:5Pages:665-674
Abstract5356 aluminum alloy has been widely applied in transportation, aerospace and other fields owing to its low density, excellent fatigue property, and superior corrosion resistance. Aluminum alloy is widely manufactured by the arc additive technique that operates at a fast manufacturing speed with simple equipment and high material utilization. The property of 5356 aluminum alloy is closely related to its microstructure. To better control the property of this alloy for the additive manufacturing of forming parts, it is necessary to study the evolution of its microstructure. In this work, 5356 aluminum alloy forming parts were produced by tungsten inert gas welding (TIG) arc additive manufacturing, and their microstructures and mechanical properties were analyzed. The 5356 aluminum alloy formed by TIG additive manufacturing was composed of alpha-Al matrix and beta(Al3Mg2) phase. As the deposition height increased, the layer microstructure transformed from equiaxed grains to columnar grains and tended to stabilize at thermal equilibrium. The top layer exhibited a dendritic microstructure with serious segregation of the Mg element. The middle and lower microstructures were varied and included equiaxed grains, columnar grains, and a mixture of these, with improved Mg-element segregation. As the deposition height increased, the microhardness in the layer first decreased and then stabilized. The microhardness was larger in the inter-layers than in the deposition layers. The pores gathered in the interlayers might explain the lower yield strength of the thin-walled parts than the theoretically calculated value. The tensile strength, yield strength, and elongation were all anisotropic, and the tensile property was better in the transverse than in the longitudinal direction. This result was attributable to pore accumulation between the layers of the thin-walled parts and to the uneven microstructure.
Keyword5356 aluminum alloy tungsten inert gas welding (TIG) arc additive manufacturing microstructure mechanical property
Funding OrganizationNational Key Research and Development Program of China ; Changzhou Key Research and Development Plan (Social Development Science and Technology Support)
DOI10.11900/0412.1961.2020.00266
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2017YFE0100100] ; Changzhou Key Research and Development Plan (Social Development Science and Technology Support)
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000642002500010
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161140
Collection中国科学院金属研究所
Corresponding AuthorYang Ke
Affiliation1.Hohai Univ, Coll Mech & Elect Engn, Changzhou 213022, Peoples R China
2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Sun Jiaxiao,Yang Ke,Wang Qiuyu,et al. Microstructure and Mechanical Properties of 5356 Aluminum Alloy Fabricated by TIG Arc Additive Manufacturing[J]. ACTA METALLURGICA SINICA,2021,57(5):665-674.
APA Sun Jiaxiao,Yang Ke,Wang Qiuyu,Ji Shanlin,Bao Yefeng,&Pan Jie.(2021).Microstructure and Mechanical Properties of 5356 Aluminum Alloy Fabricated by TIG Arc Additive Manufacturing.ACTA METALLURGICA SINICA,57(5),665-674.
MLA Sun Jiaxiao,et al."Microstructure and Mechanical Properties of 5356 Aluminum Alloy Fabricated by TIG Arc Additive Manufacturing".ACTA METALLURGICA SINICA 57.5(2021):665-674.
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