LaB6 对激光熔覆 In718/LaB6 复合涂层微观结构和耐磨性的影响

IF 2.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Materials Research Pub Date : 2024-08-01 DOI:10.1557/s43578-024-01392-8
Chenhui Cui, Meiping Wu, Hang Wang, Dadong Jie, Xin jin, Xiaojin Miao
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摘要

本研究采用激光熔覆法在 In718 基体上制备了 LaB6 含量为 0-8 wt% 的 In718/LaB6 复合镀层,并通过研究镀层的相组成、显微组织、显微硬度和耐磨性,探讨了 LaB6 强化 In718 镍基高温合金的机理。结果表明,LaB6 的加入降低了 G/R 比,促进了等轴晶粒的形成。当 LaB6 的添加量为 6 wt% 时,涂层的耐磨性最好,磨损率为 4.59 × 10-4 mm3/N m;当 LaB6 的添加量为 8 wt% 时,涂层的显微硬度最高,与基体相比,平均显微硬度提高了 52.7%。然而,过量添加 LaB6 会导致组织分布不均匀,从而对涂层的耐磨性产生负面影响。
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Effect of LaB6 on the microstructure and wear resistance of In718/LaB6 composite coatings by laser cladding

In this study, In718/LaB6 composite coatings with LaB6 content of 0–8 wt% were prepared on In718 substrate by laser cladding method, and the mechanism of LaB6 strengthening of In718 nickel-based high-temperature alloy was investigated by studying the phase composition, microstructure, microhardness, and wear resistance of the coatings. The results show that the addition of LaB6 reduces the G/R ratio and promotes the formation of equiaxed grains. The best wear resistance was achieved at 6 wt% of LaB6, with a wear rate of 4.59 × 10−4 mm3/N m. The maximum microhardness of the coating was achieved at 8 wt%, with an increase of 52.7% in the average microhardness as compared to that of the substrate. However, the excessive addition of LaB6 promotes a non-uniform tissue distribution, which negatively affects the wear resistance of the coatings.

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来源期刊
Journal of Materials Research
Journal of Materials Research 工程技术-材料科学:综合
CiteScore
4.50
自引率
3.70%
发文量
362
审稿时长
2.8 months
期刊介绍: Journal of Materials Research (JMR) publishes the latest advances about the creation of new materials and materials with novel functionalities, fundamental understanding of processes that control the response of materials, and development of materials with significant performance improvements relative to state of the art materials. JMR welcomes papers that highlight novel processing techniques, the application and development of new analytical tools, and interpretation of fundamental materials science to achieve enhanced materials properties and uses. Materials research papers in the following topical areas are welcome. • Novel materials discovery • Electronic, photonic and magnetic materials • Energy Conversion and storage materials • New thermal and structural materials • Soft materials • Biomaterials and related topics • Nanoscale science and technology • Advances in materials characterization methods and techniques • Computational materials science, modeling and theory
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