Abstract
Based on wire arc additive manufacturing (WAAM) technology, AZ31 magnesium alloy in bulk was successfully fabricated, and its microstructure as well as mechanical properties in different planes were observed and analyzed. The AZ31 magnesium alloy has a similar microstructure in the building direction (Z) and travel direction (X), both of which are equiaxed grains. There are heat-affected zones (HAZs) with coarse grains below the fusion line. The second phase is primarily composed of the Mg17Al12 phase, which is evenly distributed in different directions. In addition, the residual stress varies in different directions. There is no significant difference in the hardness of the AZ31 alloy along the Z and X directions, with the average hardness being 68.4 HV and 67.9 HV, respectively. Even though the specimens’ ultimate tensile strength along the travel direction is higher in comparison to that along the building direction, their differences in elongation and yield strength are smaller, indicating that the anisotropy of the mechanical properties of the material is small.
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Acknowledgements
The authors would like to acknowledge the support from the International Science and Technology Cooperation Program of Shaanxi Province (No. 2023-GHZD-50), Projects of Major Innovation Platforms for Scientific and Technological and Local Transformation of Scientific and Technological Achievements of Xi’an (No. 20GXSF0003), Projects of Major Scientific and Technological Achievements Local Transformation of Xi’an (No. 2022JH-ZDZH-0039), and the Higher Education Institution Discipline Innovation and Intelligence Base of Shaanxi Province (No. S2021-ZC-GXYZ-0011).
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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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Chun-jie Xu Male, born in 1971, Professor. He has been working in the field of metallic materials preparation and their composites. In particular, his research interests mainly focus on developing new preparation techniques to expand the applications of metallic materials. To date, he has published more than 180 papers.
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Ma, D., Xu, Cj., Tian, J. et al. Study on anisotropy of microstructure and mechanical properties of AZ31 magnesium alloy fabricated by wire arc additive manufacturing. China Foundry 20, 280–288 (2023). https://doi.org/10.1007/s41230-023-2187-2
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DOI: https://doi.org/10.1007/s41230-023-2187-2