Aufsatz
Additive Manufacturing of Binary Ni–Ti Shape Memory Alloys Using Electron Beam Powder Bed Fusion: Functional Reversibility Through Minor Alloy Modification and Carbide Formation
Abstract
Shape memory alloys (SMAs), such as Ni–Ti, are promising candidates for actuation and damping applications. Although processing of Ni–Ti bulk materials is challenging, well-established processing routes (i.e. casting, forging, wire drawing, laser cutting) enabled application in several niche applications, e.g. in the medical sector. Additive manufacturing, also referred to as 4D-printing in this case, is known to be highly interesting for the fabrication of SMAs in order to produce near-net-shaped actuators and dampers. The present study investigated the impact of electron beam powder bed fusion (PBF-EB/M) on the functional properties of C-rich Ni50.9Ti49.1 alloy. The results revealed a significant loss of Ni during PBF-EB/M processing. Process microstructure property relationships are discussed in view of the applied master alloy and powder processing route, i.e. vacuum induction-melting inert gas atomization (VIGA). Relatively high amounts of TiC, being already present in the master alloy and powder feedstock, are finely dispersed in the matrix upon PBF-EB/M. This leads to a local change in the chemical composition (depletion of Ti) and a pronounced shift of the transformation temperatures. Despite the high TiC content, superelastic testing revealed a good shape recovery and, thus, a negligible degradation in both, the as-built and the heat-treated state.
Sponsorship
Gefördert im Rahmen des Projekts DEALCitation
@article{doi:10.17170/kobra-202301057316,
author={Krooß, Philipp and Lauhoff, Christian and Gustmann, Tobias and Gemming, Thomas and Sobrero, Céscar E. and Ewald, Felix Clemens and Brenne, Florian and Arnold, Tizian and Nematollahi, Mohammadreza and Elahinia, Mohammad and Thielsch, Juliane and Hufenbach, Julia Kristin and Niendorf, Thomas},
title={Additive Manufacturing of Binary Ni–Ti Shape Memory Alloys Using Electron Beam Powder Bed Fusion: Functional Reversibility Through Minor Alloy Modification and Carbide Formation},
journal={Shape Memory and Superelasticity},
year={2022}
}
0500 Oax
0501 Text $btxt$2rdacontent
0502 Computermedien $bc$2rdacarrier
1100 2022$n2022
1500 1/eng
2050 ##0##http://hdl.handle.net/123456789/14391
3000 Krooß, Philipp
3010 Lauhoff, Christian
3010 Gustmann, Tobias
3010 Gemming, Thomas
3010 Sobrero, Céscar E.
3010 Ewald, Felix Clemens
3010 Brenne, Florian
3010 Arnold, Tizian
3010 Nematollahi, Mohammadreza
3010 Elahinia, Mohammad
3010 Thielsch, Juliane
3010 Hufenbach, Julia Kristin
3010 Niendorf, Thomas
4000 Additive Manufacturing of Binary Ni–Ti Shape Memory Alloys Using Electron Beam Powder Bed Fusion: Functional Reversibility Through Minor Alloy Modification and Carbide Formation / Krooß, Philipp
4030
4060 Online-Ressource
4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/14391=x R
4204 \$dAufsatz
4170
5550 {{Memory-Legierung}}
5550 {{Rapid Prototyping <Fertigung>}}
5550 {{Pseudoelastizität}}
5550 {{Mikrostruktur}}
5550 {{Schmelzen}}
7136 ##0##http://hdl.handle.net/123456789/14391
<resource xsi:schemaLocation="http://datacite.org/schema/kernel-2.2 http://schema.datacite.org/meta/kernel-2.2/metadata.xsd"> 2023-01-27T17:15:51Z 2023-01-27T17:15:51Z 2022-11-30 doi:10.17170/kobra-202301057316 http://hdl.handle.net/123456789/14391 Gefördert im Rahmen des Projekts DEAL eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ shape memory alloy additive manufacturing superelasticity microstructure 660 Additive Manufacturing of Binary Ni–Ti Shape Memory Alloys Using Electron Beam Powder Bed Fusion: Functional Reversibility Through Minor Alloy Modification and Carbide Formation Aufsatz Shape memory alloys (SMAs), such as Ni–Ti, are promising candidates for actuation and damping applications. Although processing of Ni–Ti bulk materials is challenging, well-established processing routes (i.e. casting, forging, wire drawing, laser cutting) enabled application in several niche applications, e.g. in the medical sector. Additive manufacturing, also referred to as 4D-printing in this case, is known to be highly interesting for the fabrication of SMAs in order to produce near-net-shaped actuators and dampers. The present study investigated the impact of electron beam powder bed fusion (PBF-EB/M) on the functional properties of C-rich Ni50.9Ti49.1 alloy. The results revealed a significant loss of Ni during PBF-EB/M processing. Process microstructure property relationships are discussed in view of the applied master alloy and powder processing route, i.e. vacuum induction-melting inert gas atomization (VIGA). Relatively high amounts of TiC, being already present in the master alloy and powder feedstock, are finely dispersed in the matrix upon PBF-EB/M. This leads to a local change in the chemical composition (depletion of Ti) and a pronounced shift of the transformation temperatures. Despite the high TiC content, superelastic testing revealed a good shape recovery and, thus, a negligible degradation in both, the as-built and the heat-treated state. open access Krooß, Philipp Lauhoff, Christian Gustmann, Tobias Gemming, Thomas Sobrero, Céscar E. Ewald, Felix Clemens Brenne, Florian Arnold, Tizian Nematollahi, Mohammadreza Elahinia, Mohammad Thielsch, Juliane Hufenbach, Julia Kristin Niendorf, Thomas doi:10.1007/s40830-022-00400-2 Project Number 398899207 Memory-Legierung Rapid Prototyping <Fertigung> Pseudoelastizität Mikrostruktur Schmelzen publishedVersion eissn:2199-3858 Issue 4 Shape Memory and Superelasticity 252-462 Volume 8 false </resource>
The following license files are associated with this item:
Except where otherwise noted, this item's license is described as Namensnennung 4.0 International