Structure, Martensitic Transformation, and Damping Properties of Functionally Graded NiTi Shape Memory Alloys Fabricated by Laser Powder Bed Fusion
Besides the unique shape memory effect and superelasticity, NiTi alloys also show excellent damping properties. However, the high damping effect is highly temperature-dependent, and only exists during cooling or heating over the temperature range where martensitic transformation occurs. As a result,...
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MDPI AG
2022-07-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/14/5073 |
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| author | Hao Jiang Rui Xi Xiaoqiang Li Sergey Kustov Jan Van Humbeeck Xiebin Wang |
| author_facet | Hao Jiang Rui Xi Xiaoqiang Li Sergey Kustov Jan Van Humbeeck Xiebin Wang |
| author_sort | Hao Jiang |
| collection | DOAJ |
| description | Besides the unique shape memory effect and superelasticity, NiTi alloys also show excellent damping properties. However, the high damping effect is highly temperature-dependent, and only exists during cooling or heating over the temperature range where martensitic transformation occurs. As a result, expanding the temperature range of martensite transformation is an effective approach to widen the working temperature window with high damping performance. In this work, layer-structured functionally graded NiTi alloys were produced by laser powder bed fusion (L-PBF) alternating two or three sets of process parameters. The transformation behavior shows that austenite transforms gradually into martensite over a wide temperature range during cooling, and multiple transformation peaks are observed. A microstructure composed of alternating layers of B2/B19′ phases is obtained at room temperature. The functionally graded sample shows high damping performance over a wide temperature range of up to 70 K, which originates from the gradual formation of the martensite phase during cooling. This work proves the potential of L-PBF to create NiTi alloys with high damping properties over a wide temperature range for damping applications. |
| first_indexed | 2024-03-09T10:15:39Z |
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| id | doaj.art-b0e7885cd74b4fccaf317e37d3b12cc4 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T10:15:39Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-b0e7885cd74b4fccaf317e37d3b12cc42023-12-01T22:24:17ZengMDPI AGMaterials1996-19442022-07-011514507310.3390/ma15145073Structure, Martensitic Transformation, and Damping Properties of Functionally Graded NiTi Shape Memory Alloys Fabricated by Laser Powder Bed FusionHao Jiang0Rui Xi1Xiaoqiang Li2Sergey Kustov3Jan Van Humbeeck4Xiebin Wang5Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jingshi Road 17923, Jinan 250061, ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jingshi Road 17923, Jinan 250061, ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jingshi Road 17923, Jinan 250061, ChinaDepartament de Física, Universitat de les Illes Balears, Cra Valldemossa km 7.5, E07122 Palma de Mallorca, SpainDepartment of Materials Engineering, University of Leuven (KU Leuven), Kasteelpark Arenberg 44 Bus 2450, B3001 Heverlee, BelgiumKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jingshi Road 17923, Jinan 250061, ChinaBesides the unique shape memory effect and superelasticity, NiTi alloys also show excellent damping properties. However, the high damping effect is highly temperature-dependent, and only exists during cooling or heating over the temperature range where martensitic transformation occurs. As a result, expanding the temperature range of martensite transformation is an effective approach to widen the working temperature window with high damping performance. In this work, layer-structured functionally graded NiTi alloys were produced by laser powder bed fusion (L-PBF) alternating two or three sets of process parameters. The transformation behavior shows that austenite transforms gradually into martensite over a wide temperature range during cooling, and multiple transformation peaks are observed. A microstructure composed of alternating layers of B2/B19′ phases is obtained at room temperature. The functionally graded sample shows high damping performance over a wide temperature range of up to 70 K, which originates from the gradual formation of the martensite phase during cooling. This work proves the potential of L-PBF to create NiTi alloys with high damping properties over a wide temperature range for damping applications.https://www.mdpi.com/1996-1944/15/14/5073shape memory alloyNiTiadditive manufacturinglaser powder bed fusionfunctionally graded materialsdamping |
| spellingShingle | Hao Jiang Rui Xi Xiaoqiang Li Sergey Kustov Jan Van Humbeeck Xiebin Wang Structure, Martensitic Transformation, and Damping Properties of Functionally Graded NiTi Shape Memory Alloys Fabricated by Laser Powder Bed Fusion Materials shape memory alloy NiTi additive manufacturing laser powder bed fusion functionally graded materials damping |
| title | Structure, Martensitic Transformation, and Damping Properties of Functionally Graded NiTi Shape Memory Alloys Fabricated by Laser Powder Bed Fusion |
| title_full | Structure, Martensitic Transformation, and Damping Properties of Functionally Graded NiTi Shape Memory Alloys Fabricated by Laser Powder Bed Fusion |
| title_fullStr | Structure, Martensitic Transformation, and Damping Properties of Functionally Graded NiTi Shape Memory Alloys Fabricated by Laser Powder Bed Fusion |
| title_full_unstemmed | Structure, Martensitic Transformation, and Damping Properties of Functionally Graded NiTi Shape Memory Alloys Fabricated by Laser Powder Bed Fusion |
| title_short | Structure, Martensitic Transformation, and Damping Properties of Functionally Graded NiTi Shape Memory Alloys Fabricated by Laser Powder Bed Fusion |
| title_sort | structure martensitic transformation and damping properties of functionally graded niti shape memory alloys fabricated by laser powder bed fusion |
| topic | shape memory alloy NiTi additive manufacturing laser powder bed fusion functionally graded materials damping |
| url | https://www.mdpi.com/1996-1944/15/14/5073 |
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