Abstract

Nickel-Titanium (NiTi) shape memory alloys (SMA) have been broadly employed to biomedical and aerospace industry due to its functional properties, namely shape memory effect (SME) and superelasticity (SE). Usually, NiTi is thermo-mechanically processed from cast ingots, thereafter forming into rods, bars, sheets and wires. For this purpose, the material must follow a complex combination of working conditions. However, intrinsic problems such as high reactivity and strength configure an additional challenge to their processing. Nonetheless, in the last decade additive manufacturing (AM) has shown be capable of overcoming such difficulties, once it enables the manufacturing of complex SMA parts of maintaining its desired functional properties [1].
In AM, powder-based processes have skyrocketed and, according to recent reviews, selective laser melting (SLM) is the main technique used for the processing of SMA. On the other hand, SLM and related powder-based processes still present two critical limitations: impurity pick-up (C, O and N) and part size limitation. One alternative to mitigate the aforementioned problems is found on the electron beam freeform fabrication (EBF3) technique. EBF3 uses electron beam as energy source and wires as feedstock, additively fabricating medium-to-large near net shape parts. In addition, since processing takes place in a vacuum chamber, the level of contamination is reduced. In reason of its versatility, this cutting-edge technology has gained importance achieving increasingly more acceptance for industrial applications. To the best of authors’ knowledge, there are currently no scientific work addressing the EBF3 fabrication of SMA. The present work addresses the first results on EBF3 of SMAs by studying NiTi alloys.
Originalspracheenglisch
PublikationsstatusVeröffentlicht - 26 Sep 2019
VeranstaltungAdvanced Materials Day 2019 - TU Graz, Graz, Österreich
Dauer: 26 Sep 201926 Sep 2019
http://ams.tugraz.at/AMD2019/

Sonstiges

SonstigesAdvanced Materials Day 2019
LandÖsterreich
OrtGraz
Zeitraum26/09/1926/09/19
Internetadresse

Fingerprint

Shape memory effect
Printing
Titanium
Nickel
3D printers
Electron beams
Melting
Processing
Wire
Powders
Fabrication
Lasers
Aerospace industry
Nickel alloys
Ingots
Titanium alloys
Feedstocks
Industrial applications
Contamination
Vacuum

Schlagwörter

    Dies zitieren

    Paiotti Marcondes Guimaraes, R., Pixner, F., Trimmel, G., & Amancio-Filho, S. T. (2019). 4-D Printing of NiTi Shape Memory Alloys. Postersitzung präsentiert bei Advanced Materials Day 2019, Graz, Österreich.

    4-D Printing of NiTi Shape Memory Alloys. / Paiotti Marcondes Guimaraes, Rafael; Pixner, Florian; Trimmel, Gregor; Amancio-Filho, S. T.

    2019. Postersitzung präsentiert bei Advanced Materials Day 2019, Graz, Österreich.

    Publikation: KonferenzbeitragPosterForschung

    Paiotti Marcondes Guimaraes R, Pixner F, Trimmel G, Amancio-Filho ST. 4-D Printing of NiTi Shape Memory Alloys. 2019. Postersitzung präsentiert bei Advanced Materials Day 2019, Graz, Österreich.
    @conference{6e9454f5460844ae8466ac601606d403,
    title = "4-D Printing of NiTi Shape Memory Alloys",
    abstract = "Nickel-Titanium (NiTi) shape memory alloys (SMA) have been broadly employed to biomedical and aerospace industry due to its functional properties, namely shape memory effect (SME) and superelasticity (SE). Usually, NiTi is thermo-mechanically processed from cast ingots, thereafter forming into rods, bars, sheets and wires. For this purpose, the material must follow a complex combination of working conditions. However, intrinsic problems such as high reactivity and strength configure an additional challenge to their processing. Nonetheless, in the last decade additive manufacturing (AM) has shown be capable of overcoming such difficulties, once it enables the manufacturing of complex SMA parts of maintaining its desired functional properties [1].In AM, powder-based processes have skyrocketed and, according to recent reviews, selective laser melting (SLM) is the main technique used for the processing of SMA. On the other hand, SLM and related powder-based processes still present two critical limitations: impurity pick-up (C, O and N) and part size limitation. One alternative to mitigate the aforementioned problems is found on the electron beam freeform fabrication (EBF3) technique. EBF3 uses electron beam as energy source and wires as feedstock, additively fabricating medium-to-large near net shape parts. In addition, since processing takes place in a vacuum chamber, the level of contamination is reduced. In reason of its versatility, this cutting-edge technology has gained importance achieving increasingly more acceptance for industrial applications. To the best of authors’ knowledge, there are currently no scientific work addressing the EBF3 fabrication of SMA. The present work addresses the first results on EBF3 of SMAs by studying NiTi alloys.",
    keywords = "Shape memory alloys, electron beam freeform fabrication, nitinol, Additive manufacturing",
    author = "{Paiotti Marcondes Guimaraes}, Rafael and Florian Pixner and Gregor Trimmel and Amancio-Filho, {S. T.}",
    year = "2019",
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    T1 - 4-D Printing of NiTi Shape Memory Alloys

    AU - Paiotti Marcondes Guimaraes, Rafael

    AU - Pixner, Florian

    AU - Trimmel, Gregor

    AU - Amancio-Filho, S. T.

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    N2 - Nickel-Titanium (NiTi) shape memory alloys (SMA) have been broadly employed to biomedical and aerospace industry due to its functional properties, namely shape memory effect (SME) and superelasticity (SE). Usually, NiTi is thermo-mechanically processed from cast ingots, thereafter forming into rods, bars, sheets and wires. For this purpose, the material must follow a complex combination of working conditions. However, intrinsic problems such as high reactivity and strength configure an additional challenge to their processing. Nonetheless, in the last decade additive manufacturing (AM) has shown be capable of overcoming such difficulties, once it enables the manufacturing of complex SMA parts of maintaining its desired functional properties [1].In AM, powder-based processes have skyrocketed and, according to recent reviews, selective laser melting (SLM) is the main technique used for the processing of SMA. On the other hand, SLM and related powder-based processes still present two critical limitations: impurity pick-up (C, O and N) and part size limitation. One alternative to mitigate the aforementioned problems is found on the electron beam freeform fabrication (EBF3) technique. EBF3 uses electron beam as energy source and wires as feedstock, additively fabricating medium-to-large near net shape parts. In addition, since processing takes place in a vacuum chamber, the level of contamination is reduced. In reason of its versatility, this cutting-edge technology has gained importance achieving increasingly more acceptance for industrial applications. To the best of authors’ knowledge, there are currently no scientific work addressing the EBF3 fabrication of SMA. The present work addresses the first results on EBF3 of SMAs by studying NiTi alloys.

    AB - Nickel-Titanium (NiTi) shape memory alloys (SMA) have been broadly employed to biomedical and aerospace industry due to its functional properties, namely shape memory effect (SME) and superelasticity (SE). Usually, NiTi is thermo-mechanically processed from cast ingots, thereafter forming into rods, bars, sheets and wires. For this purpose, the material must follow a complex combination of working conditions. However, intrinsic problems such as high reactivity and strength configure an additional challenge to their processing. Nonetheless, in the last decade additive manufacturing (AM) has shown be capable of overcoming such difficulties, once it enables the manufacturing of complex SMA parts of maintaining its desired functional properties [1].In AM, powder-based processes have skyrocketed and, according to recent reviews, selective laser melting (SLM) is the main technique used for the processing of SMA. On the other hand, SLM and related powder-based processes still present two critical limitations: impurity pick-up (C, O and N) and part size limitation. One alternative to mitigate the aforementioned problems is found on the electron beam freeform fabrication (EBF3) technique. EBF3 uses electron beam as energy source and wires as feedstock, additively fabricating medium-to-large near net shape parts. In addition, since processing takes place in a vacuum chamber, the level of contamination is reduced. In reason of its versatility, this cutting-edge technology has gained importance achieving increasingly more acceptance for industrial applications. To the best of authors’ knowledge, there are currently no scientific work addressing the EBF3 fabrication of SMA. The present work addresses the first results on EBF3 of SMAs by studying NiTi alloys.

    KW - Shape memory alloys

    KW - electron beam freeform fabrication

    KW - nitinol

    KW - Additive manufacturing

    M3 - Poster

    ER -