Wenlei
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- Professional Title:Research Fellow（Nature Science）
Supervisor of Doctorate Candidates
Alma Mater:哈尔滨工业大学
Discipline:Materials Science
Education Level:研究生
Degree:博士
School/Department:国家材料服役安全科学中心
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- Paper Publications
Design and Characterization of SMAT-MAO composite coating and its influence on the fatigue property of 2024 Al alloy
Release time:2022-04-13 Hits:
- Affiliation of Author(s):国家材料服役安全科学中心
- Teaching and Research Group:综合科
- Journal:Rare Metal Materials and Engineering
- Funded by:国家自然科学基金项目
- Key Words:Aluminum alloy; Fatigue; Microarc oxidation; Surface mechanical attrition treatment
- Abstract:SMAT-MAO composite coating, consisting of a bottom nanocrystalline layer and a top ceramic coating, was designed and fabricated on the surface of 2024 Al alloy. The microstructure and phase composition of SMAT-MAO coating was examined using X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The fatigue life of the treated alloy was evaluated. The results indicate that the SMAT-MAO coated samples with 5 and 10 μm thick ceramic coatings exhibit improved fatigue lifetime, increasing by 21.9 and 23.2%, respectively. The improved fatigue property is attributed to the combined effect of nanocrystalline structure and residual compressive stress induced in the substrate near the ceramic coating. With ceramic coating thickness increasing to 15 μm, the fatigue lifetime of the SMAT-MAO coated sample is lightly reduced due to the protrudent degrading effect caused by the much bigger pores and pre-existed micro cracks on the coating surface.
- First Author:文磊
- Volume:43
- Issue:7
- Page Number:2
- Number of Words:2
- ISSN No.:1002-185X
- Translation or Not:no