文献类型：期刊文献

英文题名：Tribological behavior of laser-cladded CoCrFeNi system high-entropy alloy coatings before and after immersion in 3.5 wt. % NaCl solution

作者：Luo, Fangyan[1,2];Jin, Hongtao[1];Shi, Wenqing[3];Huang, Jiang[1,2]

机构：[1]Guangdong Ocean Univ, Sch Elect & Informat Engn, Zhanjiang 524088, Guangdong, Peoples R China;[2]Guangdong Ocean Univ, Guangdong Prov Key Lab Intelligent Equipment South, Zhanjiang 524088, Peoples R China;[3]Guangdong Ocean Univ, Sch Mat Sci & Engn, Yangjiang 529500, Guangdong, Peoples R China

年份：2026

卷号：29

期号：4

外文期刊名：ISCIENCE

收录：SCI-EXPANDED(收录号：WOS:001718408800001)、、WOS

基金：The authors sincerely thank the anonymous reviewers for their insightful com-ments and suggestions. This work was supported by the National Natural Science Foundation of China (no. 62073089) , the Fund of Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching (grant no. 2023B1212030003) , and the Postgraduate Education Innovation Project of Guangdong Ocean University (202534) .

语种：英文

外文关键词：Applied sciences; Coatings; Materials science

外文摘要：In marine engineering, steels are prone to corrosion after long-term seawater immersion, while the tribological properties of coatings post-immersion-which are critical to engineering reliability-remain insufficiently investigated. To address this gap, three coatings (CoCrFeNi, CoCrFeNi-Mn, and CoCrFeNi-Al) were fabricated on Q235B steel substrates via laser cladding (laser power: 1200 W, scanning speed: 500 mm/min). Systematic tribological tests were performed before and after 90 h of immersion in 3.5 wt % NaCl solution at 17 degrees C (simulated seawater conditions). Key findings show that CoCrFeNi and CoCrFeNi-Mn coatings possess a single face-centered cubic (FCC) phase, whereas CoCrFeNi-Al transforms into a body-centered cubic (BCC) phase, with grain size ranking as CoCrFeNi > CoCrFeNi-Mn > CoCrFeNi-Al. Before immersion, CoCrFeNi-Al exhibits optimal hardness (494.29 HV) and wear resistance (wear rate: 4.88 & times; 10(-5) mm(3) N-1 m(-1)). After immersion, CoCrFeNi-Mn achieves the best wear resistance (wear rate: 1.23 & times; 10(-5) mm(3) N-1 m(-1)). This work provides theoretical support and guidance for studying the tribological properties of metallic coatings after long-term immersion in marine engineering.