Effect of La2O3 Addition on Microstructure and Tribological Performance of Laser Cladded Ni-WC Coating on S136 Steel

Yongfu, Xu; Dejun, Kong

doi:10.1007/s12666-022-02554-0

Cited by 1 publication

(1 citation statement)

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“…As illustrated in Section 2.2, RECs can separate, pin, and adsorb in the active sites at grain borders, lowering the system's Gibbs free energy and the driving force for grain growth. Xu et al [84] discovered that cladding La 2 O 3 -modified Ni-based coatings on S136 steel resulted in the production of distinct morphologies of dendrites at different portions of the dendritic arms at varied temperatures and solidification speeds. At lower La 2 O 3 levels, element diffusion in the molten pool was faster, and the crystallization rate was slower, resulting in the creation of dendritic crystal formations.…”

Section: Modification Of Grain Morphologymentioning

confidence: 99%

Effects of Rare Earths on Microstructure and Wear Resistance in Metal Additive Manufacturing: A Review

Xiang,

Wang,

Zheng

et al. 2024

Coatings

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Rare earth elements (REEs) doping technology can effectively control the microstructure and improve the quality and performance of materials. This paper summarizes the research progress of REEs in metal additive manufacturing (MAM) in recent years and briefly introduces the effects of REEs on the molten pool fluidity, purified structure, and interfacial bonding between the molten cladding layer and substrate. It focuses on the mechanism of the role of REEs in the refinement and homogenization of microstructures, including grain growth, columnar to equiaxed transition (CET), and elemental segregation. The reasons for the influence of REEs on the homogenization of the structure and elemental segregation are analyzed. The effects of REE type, content, and dimension on hardness and wear resistance are investigated. Finally, tribological applications of REEs in biological and high-temperature environments are summarized, and the impact of REEs-modified alloys is summarized and prospected.

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Section: Modification Of Grain Morphologymentioning

confidence: 99%