Sc/Zr microalloying on strength-corrosion performance synergy of wire-arc directed energy deposited Al-Mg
| Autor: | Yubin Zhou, Zewu Qi, Baoqiang Cong, Zihao Jiang, Xinyi Cai, Hongwei Li, Jiaqi Zhang, Chaofang Dong, Xing He, Sanbao Lin, Xiaoyu Cai, Bojin Qi |
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| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Virtual and Physical Prototyping, Vol 19, Iss 1 (2024) |
| Druh dokumentu: | article |
| ISSN: | 17452759 1745-2767 1745-2759 |
| DOI: | 10.1080/17452759.2024.2358981 |
| Popis: | WADED Al-Mg and Al-Mg-Sc-Zr aluminium alloy thin-wall components were produced. Heat treatment (350°C aging for 4 h) was further conducted. The effects of Sc/Zr addition on porosity, microstructure, mechanical properties and corrosion behaviour were investigated. With Sc/Zr adding, pore area fraction decreased from 0.208 to 0.005% and grain size decreased from 84.34 to 19.54 μm. In WADED Al-Mg-Sc-Zr component, microstructure showed refined equiaxed grains. Mechanical properties were improved with 360 MPa ultimate tensile strength (UTS), 185 MPa yield strength, and 23.31% elongation. After heat treatment, UTS increased to 388 MPa with good ductility (22.53%) maintained. The grain refinement and Al3(Sc, Zr) particles were the key factors for mechanical property improvement. The corrosion behaviour was improved with introduced Sc/Zr and further optimised after heat treatment. The corrosion exhibited layered characteristics due to the distribution of primary Al3(Sc, Zr) while minor-size secondary Al3(Sc, Zr) along grain boundaries improved the corrosion behaviour. |
| Databáze: | Directory of Open Access Journals |
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