Microstructure Formation and Mechanical Properties of a Wire-Arc Additive Manufactured Magnesium Alloy
| Autor: | Stefan Gneiger, Aurel Arnoldt, Martin Schnall, Thomas Klein |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Magnesium Alloy 0211 other engineering and technologies General Engineering chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Microstructure Arc (geometry) chemistry engineering General Materials Science Texture (crystalline) Magnesium alloy Composite material 0210 nano-technology Anisotropy Material properties 021102 mining & metallurgy |
| Zdroj: | JOM. 73:1126-1134 |
| ISSN: | 1543-1851 1047-4838 |
| Popis: | Wire-arc additive manufacturing offers great advantages in terms of design freedom with respect to conventional manufacturing processes. This design freedom translates into additional options for light-weighting, further raised by use of light-weight materials such as magnesium. Here, Cold Metal Transfer is used to manufacture specimens using the magnesium AZ61A alloy. The fabricated deposit has been characterized in-depth in terms of microstructure and mechanical properties. A homogeneous and fine-grained microstructure was observed with no variations in hardness throughout the specimen height. Analyzed second phases are fine due to the high process-intrinsic cooling rates. A weak basal-fiber texture was observed, which is more pronounced in the fusion zone and becomes diffuse in the intralayer region. This texture translates into a weak mechanical anisotropy. The assessment of the mechanical properties suggests values between typical cast and wrought material properties. This study demonstrates the feasibility of processing magnesium alloys by wire-arc additive manufacturing. |
| Databáze: | OpenAIRE |
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