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Microstructural Evolution and Mechanical Evaluation of a Laser-Induced Composite Coating on a Ni-Based Superalloy during Thermal Exposure
Li, Yuebing; He, Yanming; Lu, Chuanyang; Zheng, Wenjian; Yang, Jianguo; Wang, Donghong; Wang, Limei; Sun, Yuan; Gao, Zengliang
2019-05-01
Source PublicationMATERIALS
ISSN1996-1944
Volume12Issue:9
AbstractA Ni-17Mo-7Cr-based superalloy was laser surface-modified to improve its tribological properties. Si particles were employed as coating materials. Si melted on the surface of the alloy during the process, triggering the formation of Mo6Ni6C carbides and Ni-Si intermetallics. A defect-free coating obtained was mostly made up of primary Mo6Ni6C and -Ni31Si12, as well as a eutectic structure of (1)-Ni3Si and -Ni-based solid solution (-Ni (s.s)). The volume fraction of hard reinforcements (Mo6Ni6C, -Ni31Si12, and (1)-Ni3Si) reached up to 85% in the coating. High-temperature microstructural stability of the coating was investigated by aging the coating at 1073 K for 240-480 h, to reveal its microstructural evolution. In addition, the mechanical performance of the coating was investigated. The nanoscale elastic modulus and hardness of Mo6Ni6C, -Ni31Si12, and -Ni (s.s) were characterized using the nanoindentation tests. The nanoscratch tests were performed to measure the local wear resistance of the coating. Lastly, the Vickers hardness distribution across the cross-section of the coating before and after thermal exposure was compared. The work performed provides basic information understanding the microstructural evolution and mechanical performance of laser-induced coatings on Ni-based superalloys.
KeywordNi-based superalloy laser surface modification thermal exposure microstructure mechanical property
Indexed BySCI
Language英语
WOS IDWOS:000469757500080
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81119
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Li, Yuebing,He, Yanming,Lu, Chuanyang,et al. Microstructural Evolution and Mechanical Evaluation of a Laser-Induced Composite Coating on a Ni-Based Superalloy during Thermal Exposure[J]. MATERIALS,2019,12(9).
APA Li, Yuebing.,He, Yanming.,Lu, Chuanyang.,Zheng, Wenjian.,Yang, Jianguo.,...&Gao, Zengliang.(2019).Microstructural Evolution and Mechanical Evaluation of a Laser-Induced Composite Coating on a Ni-Based Superalloy during Thermal Exposure.MATERIALS,12(9).
MLA Li, Yuebing,et al."Microstructural Evolution and Mechanical Evaluation of a Laser-Induced Composite Coating on a Ni-Based Superalloy during Thermal Exposure".MATERIALS 12.9(2019).
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