Plasma electrolytic polishing of nitinol : investigation of functional properties

Navickaite, Kristina (author), Ianniciello, Lucia (author), Tušek, Jaka (author), Engelbrecht, Kurt (author), Bahl, Christian Robert Haffenden (author), Penzel, Michael (author), Nestler, Klaus (author), Böttger-Hiller, Falko (author), Zeidler, Henning (author)

A novel, environmentally friendly, fast, and flexible polishing process for Nitinol parts is presented in this study. Nitinol samples with both superelastic and shape memory properties at room temperature were investigated. The chemical contamination and surface roughness of superelastic Nitinol plates were examined before and after plasma electrolytic polishing. The shift in phase transformation temperature and tensile strength before and after the polishing process were analysed using Nitinol wire with shape memory properties. The obtained experimental results were compared to the data obtained on reference samples examined in the as-received condition. It was found that plasma electrolytic polishing, when the right process parameters are applied, is capable of delivering Nitinol parts with extremely high surface quality. Moreover, it was experimentally proven that plasma electrolytic polishing does not have a negative impact on functionality or mechanical properties of polished parts.

• Language: English
• Keywords: plasma electrolytic polishing (PeP), shape memory alloys, nitinol, mechanical stability, elastocalorics, medical applications
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: 13 str.
• Numbering: Vol. 14, iss. 21, art. 6450
• PID: 20.500.12556/RUL-132851
• UDC: 620.1:538.9:62-97-022.121
• ISSN on article: 1996-1944
• DOI: 10.3390/ma14216450
• COBISS.SI-ID: 83643907
• Publication date in RUL: 05.11.2021

Record is a part of a journal

• Title: Materials
• Shortened title: Materials
• Publisher: MDPI
• ISSN: 1996-1944
• COBISS.SI-ID: 33588485

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 01.11.2021

Secondary language

• Language: Slovenian
• Keywords: plazemsko elektrolitsko poliranje, materiali z oblikovnim spominom, Ni-Ti, mehanska stabilnost, elastokalorični učinek, medicinske aplikacije

Projects

• Funder: Other - Other funder or multiple funders
• Funding programme: Independent Research Fund Denmark
• Project number: 8022-00277B

• Funder: Other - Other funder or multiple funders
• Funding programme: German Federation of Industrial Research Associations (AiF)
• Project number: IGF 20594 BR