Bio-inspired functional surface fabricated by electrically assisted micro-embossing of AZ31 magnesium alloy
| Autor: | Jian Cao, Xinwei Wang, Antonio J. Sánchez Egea, Chunju Wang, Jianwei Li, Chen Liu, Jie Xu, Bin Guo, Tiejun Zhang, Zhenlong Wang |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Mecànica, Universitat Politècnica de Catalunya. TECNOFAB - Grup de Recerca en Tecnologies de Fabricació |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
Photolithography business.product_category Thermoplastic Materials science Silicon bio-inspired functional surface Bulk metallic glass chemistry.chemical_element 02 engineering and technology lcsh:Technology Article 020901 industrial engineering & automation Enginyeria mecànica [Àrees temàtiques de la UPC] Formability General Materials Science Composite material Magnesium alloy photolithography lcsh:Microscopy micro-embossing lcsh:QC120-168.85 chemistry.chemical_classification Electrically assisted Amorphous metal electrically assisted lcsh:QH201-278.5 lcsh:T 021001 nanoscience & nanotechnology Micro-embossing chemistry bulk metallic glass lcsh:TA1-2040 Die (manufacturing) lcsh:Descriptive and experimental mechanics Magnesi -- Aliatges lcsh:Electrical engineering. Electronics. Nuclear engineering Bio-inspired functional surface 0210 nano-technology business lcsh:Engineering (General). Civil engineering (General) Current density Embossing lcsh:TK1-9971 |
| Zdroj: | Materials, Vol 13, Iss 2, p 412 (2020) Materials Volume 13 Issue 2 UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| Popis: | Developing bio-inspired functional surfaces on engineering metals is of extreme importance, involving different industrial sectors, like automotive or aeronautics. In particular, micro-embossing is one of the efficient and large-scale processes for manufacturing bio-inspired textures on metallic surfaces. However, this process faces some problems, such as filling defects and die breakage due to size effect, which restrict this technology for some components. Electrically assisted micro-forming has demonstrated the ability of reducing size effects, improving formability and decreasing flow stress, making it a promising hybrid process to control the filling quality of micro-scale features. This research focuses on the use of different current densities to perform embossed micro-channels of 7 &mu m and sharklet patterns of 10 &mu m in textured bulk metallic glass dies. These dies are prepared by thermoplastic forming based on the compression of photolithographic silicon molds. The results show that large areas of bio-inspired textures could be fabricated on magnesium alloy when current densities higher than 6 A/mm2 (threshold) are used. The optimal surface quality scenario is obtained for a current density of 13 A/mm2. Additionally, filling depth and depth&ndash width ratio nonlinearly increases when higher current densities are used, where the temperature is a key parameter to control, keeping it below the temperature of the glass transition to avoid melting or an early breakage of the die. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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