{"title":"Effect of LaB6 on the microstructure and wear resistance of In718/LaB6 composite coatings by laser cladding","authors":"Chenhui Cui, Meiping Wu, Hang Wang, Dadong Jie, Xin jin, Xiaojin Miao","doi":"10.1557/s43578-024-01392-8","DOIUrl":null,"url":null,"abstract":"<p>In this study, In718/LaB<sub>6</sub> composite coatings with LaB<sub>6</sub> content of 0–8 wt% were prepared on In718 substrate by laser cladding method, and the mechanism of LaB<sub>6</sub> 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 LaB<sub>6</sub> reduces the G/R ratio and promotes the formation of equiaxed grains. The best wear resistance was achieved at 6 wt% of LaB<sub>6</sub>, with a wear rate of 4.59 × 10<sup>−4</sup> mm<sup>3</sup>/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 LaB<sub>6</sub> promotes a non-uniform tissue distribution, which negatively affects the wear resistance of the coatings.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\n","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"1 1","pages":""},"PeriodicalIF":2.7000,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Research","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1557/s43578-024-01392-8","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
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.
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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