Effects of Substrate Roughness on Microstructure and Fatigue Behavior of Plasma Electrolytic Oxidation-Coated Ti-6Al-4V Alloy
Ceramic coatings were prepared by plasma electrolytic oxidation (PEO) on four different surface roughness’ of Ti-6Al-4V alloys. The effects of substrate roughness on the microstructure and fatigue behavior were investigated. Microstructural characterization was carried out by scanning electron micro...
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MDPI AG
2022-06-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/12/4256 |
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| author | Fangquan Xi Yong Huang Yahui Zhao Yang Liu Weibing Dai Yanzhong Tian |
| author_facet | Fangquan Xi Yong Huang Yahui Zhao Yang Liu Weibing Dai Yanzhong Tian |
| author_sort | Fangquan Xi |
| collection | DOAJ |
| description | Ceramic coatings were prepared by plasma electrolytic oxidation (PEO) on four different surface roughness’ of Ti-6Al-4V alloys. The effects of substrate roughness on the microstructure and fatigue behavior were investigated. Microstructural characterization was carried out by scanning electron microscopy (SEM) and a laser scanning confocal microscope. In addition, an X-ray diffractometer (XRD) and a U-X360 stress meter were used to analyze the phase composition and residual stress properties of the coatings. The microstructure of coatings revealed the growth mechanism of the coatings. The larger and deeper grooves of the substrate promoted the nucleation and growth of the PEO coating, but the defects (cracks and pores) of the oxide layer became more serious. The fatigue test indicated a significant influence of substrate roughness on the fatigue life under low cyclic stress. The fatigue damage of PEO coatings decreases as the surface roughness of substrates decreases because of the synergistic effect of the coating surface defects and coating/substrate interface roughness. Substrate roughness influences the quality and fatigue performance of the oxide layer. |
| first_indexed | 2024-03-09T23:10:40Z |
| format | Article |
| id | doaj.art-5b999a1d06bd4414a620c008502faacf |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T23:10:40Z |
| publishDate | 2022-06-01 |
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| series | Materials |
| spelling | doaj.art-5b999a1d06bd4414a620c008502faacf2023-11-23T17:45:22ZengMDPI AGMaterials1996-19442022-06-011512425610.3390/ma15124256Effects of Substrate Roughness on Microstructure and Fatigue Behavior of Plasma Electrolytic Oxidation-Coated Ti-6Al-4V AlloyFangquan Xi0Yong Huang1Yahui Zhao2Yang Liu3Weibing Dai4Yanzhong Tian5School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering, Liaoning Technical University, Fuxin 123000, ChinaKey Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, ChinaCeramic coatings were prepared by plasma electrolytic oxidation (PEO) on four different surface roughness’ of Ti-6Al-4V alloys. The effects of substrate roughness on the microstructure and fatigue behavior were investigated. Microstructural characterization was carried out by scanning electron microscopy (SEM) and a laser scanning confocal microscope. In addition, an X-ray diffractometer (XRD) and a U-X360 stress meter were used to analyze the phase composition and residual stress properties of the coatings. The microstructure of coatings revealed the growth mechanism of the coatings. The larger and deeper grooves of the substrate promoted the nucleation and growth of the PEO coating, but the defects (cracks and pores) of the oxide layer became more serious. The fatigue test indicated a significant influence of substrate roughness on the fatigue life under low cyclic stress. The fatigue damage of PEO coatings decreases as the surface roughness of substrates decreases because of the synergistic effect of the coating surface defects and coating/substrate interface roughness. Substrate roughness influences the quality and fatigue performance of the oxide layer.https://www.mdpi.com/1996-1944/15/12/4256roughnessmicrostructurefatigue behaviorfatigue behaviorstress concentration |
| spellingShingle | Fangquan Xi Yong Huang Yahui Zhao Yang Liu Weibing Dai Yanzhong Tian Effects of Substrate Roughness on Microstructure and Fatigue Behavior of Plasma Electrolytic Oxidation-Coated Ti-6Al-4V Alloy Materials roughness microstructure fatigue behavior fatigue behavior stress concentration |
| title | Effects of Substrate Roughness on Microstructure and Fatigue Behavior of Plasma Electrolytic Oxidation-Coated Ti-6Al-4V Alloy |
| title_full | Effects of Substrate Roughness on Microstructure and Fatigue Behavior of Plasma Electrolytic Oxidation-Coated Ti-6Al-4V Alloy |
| title_fullStr | Effects of Substrate Roughness on Microstructure and Fatigue Behavior of Plasma Electrolytic Oxidation-Coated Ti-6Al-4V Alloy |
| title_full_unstemmed | Effects of Substrate Roughness on Microstructure and Fatigue Behavior of Plasma Electrolytic Oxidation-Coated Ti-6Al-4V Alloy |
| title_short | Effects of Substrate Roughness on Microstructure and Fatigue Behavior of Plasma Electrolytic Oxidation-Coated Ti-6Al-4V Alloy |
| title_sort | effects of substrate roughness on microstructure and fatigue behavior of plasma electrolytic oxidation coated ti 6al 4v alloy |
| topic | roughness microstructure fatigue behavior fatigue behavior stress concentration |
| url | https://www.mdpi.com/1996-1944/15/12/4256 |
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