Effect of a bimodal grain structure on corrosion behavior and tensile properties of low-alloyed Mg–1Bi–1Zn–1Ag alloy
A novel low-alloyed Mg–1Bi–1Zn–1Ag alloy system was developed by extrusion at different extrusion ratios to achieve a bimodal grain structure. The dependence of the corrosion behavior and tensile properties on the grain structure was analyzed. The sample obtained at the extrusion ratio of 9 (BZQ111-...
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Published in | Journal of materials research and technology Vol. 24; pp. 9249 - 9260 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
01.05.2023
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | A novel low-alloyed Mg–1Bi–1Zn–1Ag alloy system was developed by extrusion at different extrusion ratios to achieve a bimodal grain structure. The dependence of the corrosion behavior and tensile properties on the grain structure was analyzed. The sample obtained at the extrusion ratio of 9 (BZQ111-R9) displayed a bimodal grain microstructure. In addition, its dominant corrosion mode was filiform with intergranular corrosion at a low corrosion rate of 0.06 mm/a. An improved synergy between strength (tensile yield strength of 207.1 MPa) and ductility (elongation of 35.9%) was realized in the BZQ111-R9 sample. Thus, the proposed approach can develop low-alloyed Mg–Bi-based alloys with excellent synergy between the corrosion resistance and tensile properties based on the control of the bimodal grain structure. |
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ISSN: | 2238-7854 |
DOI: | 10.1016/j.jmrt.2023.05.166 |