Effect of surface-modified MgO nanoparticles on intragranular ferrite nucleated on inclusions in low-alloy steel

Guo, Hao; Yang, Shufeng; Zhang, Yanling; Li, Jingshe; Wang, Tiantian

doi:10.1016/j.matdes.2019.108004

Cited by 11 publications

(1 citation statement)

References 67 publications

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“…On the basis of adding micron-scale deoxidising element particles, a new method of pre-dispersing nanoparticles (NPs) was proposed in our previous research [16,17]. Al-Ti nanoparticles were used as deoxidising agents and played the role of pre-dispersing MgO.…”

Section: Introductionmentioning

confidence: 99%

Optimising inclusion and toughening the heat-affected zone of ship plate steel with MgO nanoparticles

Yuan

Yang

et al. 2020

Materials Science and Technology

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The effect of adding MgO nanoparticles to ship plate steel at welding heat-affected zones (HAZs) was experimentally studied. The results showed that the added nanoparticles obviously optimised the inclusions; the average size of the inclusions was significantly reduced, and the distribution was relatively uniform. The toughness of the base metal and HAZ increased by 20–60 J, apart from a slight decrease in the strength of the fine-grained heat-affected zone and a nearly unchanged strength in the coarse-grained heat-affected zone, and approximately ∼2 μm (Mg–Al–Ti)O-containing inclusions induced acicular ferrite effectively, thereby simultaneously enhancing the strength and toughness of the inter-critical heat-affected zone. In conclusion, these performance improvements in both the base metal and HAZ could be attributed to grain refinement and inclusion optimisation.

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Section: Introductionmentioning

confidence: 99%

Optimising inclusion and toughening the heat-affected zone of ship plate steel with MgO nanoparticles

Yuan

Yang

et al. 2020

Materials Science and Technology

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Evolutions of Microstructure by Cerium Treatment in As‐Cast M2 High‐Speed Steel

Li,

Hou,

Liu

et al. 2024

steel research int.

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The carbide distribution of M2 high speed steel (HSS) is not uniform during the solidification process. The effects of cerium (Ce) on the microstructure, primary carbides, and inclusions of M2 HSS are studied by combining experiment and theory. In the results, it is shown that the eutectic carbides of M2‐type HSS are MC‐ and M6C‐type cubic crystalline carbide and M2C‐type hexagonal crystalline carbide. The addition of rare‐earth elements does not change the type of carbides but changes their morphology. Among them, the shape factor K of the carbide increases from 0.3245 to 0.3736, and the volume percentage of the rare‐earth steel carbide decreases by 18% after 3D reconstruction. Notably, through first‐principles molecular dynamics calculations, it is shown that Ce strengthens the interaction between Fe and alloying elements in the molten state. The evolution sequence of inclusions is as follows: Al2O3 → CeAlO3, Ce2O2S → Ce2O3. The modified inclusions nucleate inhomogeneous on the primary carbide and are affected by the migration of dissolved cerium in the steel melt, resulting in a 23% thinning of the secondary dendrite arm spacing. In these results, theoretical guidance and practical guidance for improving the homogenization of as‐cast carbides are provided.

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Ga-substituted Mg-Cd ceramic composites for improving the miniaturization and wideband characteristics of high-frequency antennas

Gan

Zhang

Wang

et al. 2020

Ceramics International

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Effect of surface-modified MgO nanoparticles on intragranular ferrite nucleated on inclusions in low-alloy steel

Cited by 11 publications

References 67 publications

Optimising inclusion and toughening the heat-affected zone of ship plate steel with MgO nanoparticles

Optimising inclusion and toughening the heat-affected zone of ship plate steel with MgO nanoparticles

Evolutions of Microstructure by Cerium Treatment in As‐Cast M2 High‐Speed Steel

Ga-substituted Mg-Cd ceramic composites for improving the miniaturization and wideband characteristics of high-frequency antennas

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