Abstract
How to increase strength without sacrificing ductility has been developed as a key goal in the manufacture of high-performance metals or alloys. Herein, the double-nanophase intragranular yttrium oxide dispersion strengthened iron alloy with high strength and appreciable ductility was fabricated by solution combustion route and subsequent spark plasma sintering, and the influences of yttrium oxide content and sintering temperature on microstructures and mechanical properties were investigated. The results show at the same sintering temperature, with the increase of yttrium oxide content, the relative density of the sintered alloy decreases and the strength increases. For Fe–2wt%Y2O3 alloy, as the sintering temperature increases gradually, the compressive strength decreases, while the strain-to-failure increases. The Fe–2wt%Y2O3 alloy with 15.5 nm Y2O3 particles uniformly distributed into the 147.5 nm iron grain interior sintered at 650°C presents a high ultimate compressive strength of 1.86 GPa and large strain-to-failure of 29%. The grain boundary strengthening and intragranular second-phase particle dispersion strengthening are the main dominant mechanisms to enhance the mechanical properties of the alloy.
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Acknowledgements
This work was financially supported by the Guangdong Basic and Applied Basic Research Foundation, China (No. 2021A1515110202), the Natural Science Foundation Program of Beijing, China (Nos. 2224104, 2202031, 2174079, and 2162027), the National Natural Science Foundation Program of China (Nos. 52131307, 52130407, 52071013, 52104359, 51774035, and 52174344), the Scientific and Technological Innovation Foundation of Foshan, China (No. BK21BE007), the National Key Research and Development Program of China (Nos. 2021YFB3701900, 2022YFB3705400, and 2022YFB3708800), the Beijing Municipal Science & Technology Commission, Administrative Commission of Zhongguancun Science Park, China (No. Z221100005822001), the S&T Program of Hebei, China (No. 20311001D), and the Fundamental Research Funds for the Central Universities (Nos. FRF-IDRY-20-022, FRF-TP-20-032A2, FRF-TP-20-100A1Z, and FRF-IDRY-22-030).
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Xuanhui Qu and Lin Zhang are the editorial board member and the youth editorial board member for this journal, respectively, and were not involved in the editorial review or the decision to publish this article. 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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Zhang, D., Hao, X., Jia, B. et al. Influences of oxide content and sintering temperature on microstructures and mechanical properties of intragranular-oxide strengthened iron alloys prepared by spark plasma sintering. Int J Miner Metall Mater 30, 1748–1755 (2023). https://doi.org/10.1007/s12613-023-2631-8
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DOI: https://doi.org/10.1007/s12613-023-2631-8