Cargando…

Bio-Inspired Functional Surface Fabricated by Electrically Assisted Micro-Embossing of AZ31 Magnesium Alloy

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 sur...

Descripción completa

Detalles Bibliográficos
Autores principales: Wang, Xinwei, Xu, Jie, Wang, Chunju, Sánchez Egea, Antonio J., Li, Jianwei, Liu, Chen, Wang, Zhenlong, Zhang, Tiejun, Guo, Bin, Cao, Jian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7014324/
https://www.ncbi.nlm.nih.gov/pubmed/31963120
http://dx.doi.org/10.3390/ma13020412
_version_ 1783496604099018752
author Wang, Xinwei
Xu, Jie
Wang, Chunju
Sánchez Egea, Antonio J.
Li, Jianwei
Liu, Chen
Wang, Zhenlong
Zhang, Tiejun
Guo, Bin
Cao, Jian
author_facet Wang, Xinwei
Xu, Jie
Wang, Chunju
Sánchez Egea, Antonio J.
Li, Jianwei
Liu, Chen
Wang, Zhenlong
Zhang, Tiejun
Guo, Bin
Cao, Jian
author_sort Wang, Xinwei
collection PubMed
description 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 μm and sharklet patterns of 10 μm 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/mm(2) (threshold) are used. The optimal surface quality scenario is obtained for a current density of 13 A/mm(2). Additionally, filling depth and depth–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.
format Online
Article
Text
id pubmed-7014324
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-70143242020-03-09 Bio-Inspired Functional Surface Fabricated by Electrically Assisted Micro-Embossing of AZ31 Magnesium Alloy Wang, Xinwei Xu, Jie Wang, Chunju Sánchez Egea, Antonio J. Li, Jianwei Liu, Chen Wang, Zhenlong Zhang, Tiejun Guo, Bin Cao, Jian Materials (Basel) Article 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 μm and sharklet patterns of 10 μm 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/mm(2) (threshold) are used. The optimal surface quality scenario is obtained for a current density of 13 A/mm(2). Additionally, filling depth and depth–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. MDPI 2020-01-16 /pmc/articles/PMC7014324/ /pubmed/31963120 http://dx.doi.org/10.3390/ma13020412 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Xinwei
Xu, Jie
Wang, Chunju
Sánchez Egea, Antonio J.
Li, Jianwei
Liu, Chen
Wang, Zhenlong
Zhang, Tiejun
Guo, Bin
Cao, Jian
Bio-Inspired Functional Surface Fabricated by Electrically Assisted Micro-Embossing of AZ31 Magnesium Alloy
title Bio-Inspired Functional Surface Fabricated by Electrically Assisted Micro-Embossing of AZ31 Magnesium Alloy
title_full Bio-Inspired Functional Surface Fabricated by Electrically Assisted Micro-Embossing of AZ31 Magnesium Alloy
title_fullStr Bio-Inspired Functional Surface Fabricated by Electrically Assisted Micro-Embossing of AZ31 Magnesium Alloy
title_full_unstemmed Bio-Inspired Functional Surface Fabricated by Electrically Assisted Micro-Embossing of AZ31 Magnesium Alloy
title_short Bio-Inspired Functional Surface Fabricated by Electrically Assisted Micro-Embossing of AZ31 Magnesium Alloy
title_sort bio-inspired functional surface fabricated by electrically assisted micro-embossing of az31 magnesium alloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7014324/
https://www.ncbi.nlm.nih.gov/pubmed/31963120
http://dx.doi.org/10.3390/ma13020412
work_keys_str_mv AT wangxinwei bioinspiredfunctionalsurfacefabricatedbyelectricallyassistedmicroembossingofaz31magnesiumalloy
AT xujie bioinspiredfunctionalsurfacefabricatedbyelectricallyassistedmicroembossingofaz31magnesiumalloy
AT wangchunju bioinspiredfunctionalsurfacefabricatedbyelectricallyassistedmicroembossingofaz31magnesiumalloy
AT sanchezegeaantonioj bioinspiredfunctionalsurfacefabricatedbyelectricallyassistedmicroembossingofaz31magnesiumalloy
AT lijianwei bioinspiredfunctionalsurfacefabricatedbyelectricallyassistedmicroembossingofaz31magnesiumalloy
AT liuchen bioinspiredfunctionalsurfacefabricatedbyelectricallyassistedmicroembossingofaz31magnesiumalloy
AT wangzhenlong bioinspiredfunctionalsurfacefabricatedbyelectricallyassistedmicroembossingofaz31magnesiumalloy
AT zhangtiejun bioinspiredfunctionalsurfacefabricatedbyelectricallyassistedmicroembossingofaz31magnesiumalloy
AT guobin bioinspiredfunctionalsurfacefabricatedbyelectricallyassistedmicroembossingofaz31magnesiumalloy
AT caojian bioinspiredfunctionalsurfacefabricatedbyelectricallyassistedmicroembossingofaz31magnesiumalloy