Laser powder bed fusion of a superelastic Cu-Al-Mn shape memory alloy
Dense and crack-free specimens of the shape memory alloy Cu71.6Al17Mn11.4 (at.%) were produced via laser powder bed fusion across a wide range of process parameters. The microstructure, viz. grain size, can be directly tailored within the process and with it the transformation temperatures (TTs) shi...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-05-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127521001787 |
| _version_ | 1818579879376977920 |
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| author | N. Babacan S. Pauly T. Gustmann |
| author_facet | N. Babacan S. Pauly T. Gustmann |
| author_sort | N. Babacan |
| collection | DOAJ |
| description | Dense and crack-free specimens of the shape memory alloy Cu71.6Al17Mn11.4 (at.%) were produced via laser powder bed fusion across a wide range of process parameters. The microstructure, viz. grain size, can be directly tailored within the process and with it the transformation temperatures (TTs) shifted to higher values by raising the energy input. The microstructure, and the superelastic behavior of additively manufactured samples were assessed by a detailed comparison with induction melted material. The precipitation of the α phase, which inhibit the martensitic transformation, were not observed in the additively manufactured samples owing to the high intrinsic cooling rates during the fabrication process. Fine columnar grains with a strong [001]-texture along the building direction lead to an enhanced yield strength compared to the coarse-grained cast samples. A maximum recoverable strain of 2.86% was observed after 5% compressive loading. The first results of our approach imply that laser powder bed fusion is a promising technique to directly produce individually designed Cu-Al-Mn shape memory parts with a pronounced superelasticity at room temperature. |
| first_indexed | 2024-12-16T07:08:43Z |
| format | Article |
| id | doaj.art-29e4154edfed4f77a8c52964c1d5c9a5 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-16T07:08:43Z |
| publishDate | 2021-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-29e4154edfed4f77a8c52964c1d5c9a52022-12-21T22:39:58ZengElsevierMaterials & Design0264-12752021-05-01203109625Laser powder bed fusion of a superelastic Cu-Al-Mn shape memory alloyN. Babacan0S. Pauly1T. Gustmann2Leibniz Institute for Solid State and Materials Research Dresden (Leibniz IFW Dresden), Institute for Complex Materials, Dresden D-01069, Germany; Department of Mechanical Engineering, Sivas University of Science and Technology, Sivas 58140, Turkey; Corresponding author at: Department of Mechanical Engineering, Sivas University of Science and Technology, Sivas 58140, TurkeyLeibniz Institute for Solid State and Materials Research Dresden (Leibniz IFW Dresden), Institute for Complex Materials, Dresden D-01069, Germany; University of Applied Sciences Aschaffenburg, Aschaffenburg D-63743, GermanyLeibniz Institute for Solid State and Materials Research Dresden (Leibniz IFW Dresden), Institute for Complex Materials, Dresden D-01069, Germany; Corresponding author at: Leibniz Institute for Solid State and Materials Research Dresden (Leibniz IFW Dresden), Institute for Complex Materials, Dresden D-01069, Germany.Dense and crack-free specimens of the shape memory alloy Cu71.6Al17Mn11.4 (at.%) were produced via laser powder bed fusion across a wide range of process parameters. The microstructure, viz. grain size, can be directly tailored within the process and with it the transformation temperatures (TTs) shifted to higher values by raising the energy input. The microstructure, and the superelastic behavior of additively manufactured samples were assessed by a detailed comparison with induction melted material. The precipitation of the α phase, which inhibit the martensitic transformation, were not observed in the additively manufactured samples owing to the high intrinsic cooling rates during the fabrication process. Fine columnar grains with a strong [001]-texture along the building direction lead to an enhanced yield strength compared to the coarse-grained cast samples. A maximum recoverable strain of 2.86% was observed after 5% compressive loading. The first results of our approach imply that laser powder bed fusion is a promising technique to directly produce individually designed Cu-Al-Mn shape memory parts with a pronounced superelasticity at room temperature.http://www.sciencedirect.com/science/article/pii/S0264127521001787Additive manufacturingLaser powder bed fusionShape memory alloyCu-Al-MnMartensitic transformationSuperelasticity |
| spellingShingle | N. Babacan S. Pauly T. Gustmann Laser powder bed fusion of a superelastic Cu-Al-Mn shape memory alloy Materials & Design Additive manufacturing Laser powder bed fusion Shape memory alloy Cu-Al-Mn Martensitic transformation Superelasticity |
| title | Laser powder bed fusion of a superelastic Cu-Al-Mn shape memory alloy |
| title_full | Laser powder bed fusion of a superelastic Cu-Al-Mn shape memory alloy |
| title_fullStr | Laser powder bed fusion of a superelastic Cu-Al-Mn shape memory alloy |
| title_full_unstemmed | Laser powder bed fusion of a superelastic Cu-Al-Mn shape memory alloy |
| title_short | Laser powder bed fusion of a superelastic Cu-Al-Mn shape memory alloy |
| title_sort | laser powder bed fusion of a superelastic cu al mn shape memory alloy |
| topic | Additive manufacturing Laser powder bed fusion Shape memory alloy Cu-Al-Mn Martensitic transformation Superelasticity |
| url | http://www.sciencedirect.com/science/article/pii/S0264127521001787 |
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