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Shape-memory topographies on nickel–titanium alloys trained by embossing and pulse electrochemical machining

  • The two-way shape-memory effect (TWSME) in Nickel–titanium (NiTi) alloys is of interest for applications in aerospace, biomedicine, and microengineering due to its reversible shape recovery. In this study, the authors demonstrate two approaches to obtain switchable surface structures using the TWSME. Samples are structured using two surface geometries by either cold embossing, or pulse electrochemical machining (PECM). After planarization, a change from optically smooth to structured and vice versa is observed. The switch is induced through heating and cooling the sample above and below the phase transformation temperature. The protrusions reflect the pattern applied by the two processes. Both methods are promising for preparation of switchable metallic surfaces on larger areas.

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Document Type:Article
Author:Mareike Frensemeier, Dominik Schirra, Martin WeinmannORCiD, Olivier Weber, Elmar KronerORCiD
Parent Title (English):Advanced Engineering Materials
First Page:1388
Last Page:1395
Year of first Publication:2016
Release Date:2022/11/18
Impact:02.319 (2016)
Funding Information:ERC Advanced Grant “Switch2Stick,” Agreement No. 340929
Scientific Units:Functional Microstructures
Open Access:Open Access
Signature:inm 2016/080
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International