Abstract
The purpose of this study is to investigate the changes in the microstructure of 5083-H116 alloys under different annealing temperatures and sensitization treatments. The properties of both annealed and sensitized samples were analyzed using various techniques, including tensile testing, scanning electron microscopy, and optical microscopy. The susceptibility of the alloy to intergranular corrosion (IGC) and stress corrosion cracking (SCC) was evaluated using the nitric acid mass loss test (ASTM G67 NAMLT) and the slow strain rate test, respectively. The results indicate that annealing temperatures below 200 °C and above 300 °C resulted in high susceptibility to IGC and SCC due to the continuous precipitation of β-phase (Mg2Al3) along the grain boundaries. In contrast, annealing in the temperature range of 200–250 °C led to the formation of discontinuous β-phase precipitates at the grain boundaries, resulting in high resistance to IGC and SCC.
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Acknowledgements
The authors would like to extend their thanks to the National Science and Technology Council of the Republic of China under Grant no. NSTC 112-2221-E-992-088. The advice and financial support of NSTC are greatly acknowledged.
Funding
This work was funded by Ministry of Science and Technology, Taiwan (Grant No. NSTC 112-2221-E-992-088).
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Hwang, YM., Lu, CY. & Chen, RY. Influence of Microstructural Changes on Intergranular Corrosion and Stress Corrosion Cracking of 5083-H116 Alloys. Trans Indian Inst Met 77, 667–676 (2024). https://doi.org/10.1007/s12666-023-03157-z
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DOI: https://doi.org/10.1007/s12666-023-03157-z