Laser powder bed fusion (L-PBF) of Ti–6Al–4V/Ti–6Al–2Sn–4Zr–2Mo and Ti–6Al–4V/γ-TiAl bimetals: processability, interface and mechanical properties
Titanium alloys of near-α Ti–6Al–2Sn–4Zr–2Mo (Ti-6242) and intermetallic γ-TiAl (Ti–48Al–2Cr–2Nb) are commonly served as turbine blade materials operating at elevated temperatures. This study investigated the feasibility of using laser powder bed fusion (L-PBF) to fabricate two Ti–6Al–4V-based bimet...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Online Access: | https://hdl.handle.net/10356/172806 |
| _version_ | 1826117852976906240 |
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| author | Fan, Haiyang Wang, Chengcheng Tian, Yujia Zhou, Kun Yang, Shoufeng |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Fan, Haiyang Wang, Chengcheng Tian, Yujia Zhou, Kun Yang, Shoufeng |
| author_sort | Fan, Haiyang |
| collection | NTU |
| description | Titanium alloys of near-α Ti–6Al–2Sn–4Zr–2Mo (Ti-6242) and intermetallic γ-TiAl (Ti–48Al–2Cr–2Nb) are commonly served as turbine blade materials operating at elevated temperatures. This study investigated the feasibility of using laser powder bed fusion (L-PBF) to fabricate two Ti–6Al–4V-based bimetals, i.e., Ti–6Al–4V/γ-TiAl and Ti–6Al–4V/Ti-6242, which may have great potential for the future manufacturing of aerospace components. Results indicated that the bimetal of Ti–6Al–4V/γ-TiAl was unsuccessfully built despite a gradient interface (∼250 μm) achieved via L-PBF. This failure was attributed to the intrinsic cold cracking of γ-TiAl processed by L-PBF instead of the weak interfacial bonding between the two materials. In comparison, another pair of bimetal, Ti–6Al–4V/Ti-6242, was manufactured successfully by L-PBF, resulting in a solid and defect-free interface. Horizontal tensile tests were conducted, and the ultimate strength of the bimetal Ti–6Al–4V/Ti-6242 was 1314 ± 21 MPa. However, compared to single materials, the elongation of the bimetal was lowered to 2.8 ± 0.9% because of the mechanical incompatibility between Ti–6Al–4V and Ti-6242. |
| first_indexed | 2024-10-01T04:34:10Z |
| format | Journal Article |
| id | ntu-10356/172806 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:34:10Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1728062023-12-20T08:09:18Z Laser powder bed fusion (L-PBF) of Ti–6Al–4V/Ti–6Al–2Sn–4Zr–2Mo and Ti–6Al–4V/γ-TiAl bimetals: processability, interface and mechanical properties Fan, Haiyang Wang, Chengcheng Tian, Yujia Zhou, Kun Yang, Shoufeng School of Mechanical and Aerospace Engineering Engineering::Materials Engineering::Mechanical engineering Laser Powder Bed Fusion Titanium Alloy Titanium alloys of near-α Ti–6Al–2Sn–4Zr–2Mo (Ti-6242) and intermetallic γ-TiAl (Ti–48Al–2Cr–2Nb) are commonly served as turbine blade materials operating at elevated temperatures. This study investigated the feasibility of using laser powder bed fusion (L-PBF) to fabricate two Ti–6Al–4V-based bimetals, i.e., Ti–6Al–4V/γ-TiAl and Ti–6Al–4V/Ti-6242, which may have great potential for the future manufacturing of aerospace components. Results indicated that the bimetal of Ti–6Al–4V/γ-TiAl was unsuccessfully built despite a gradient interface (∼250 μm) achieved via L-PBF. This failure was attributed to the intrinsic cold cracking of γ-TiAl processed by L-PBF instead of the weak interfacial bonding between the two materials. In comparison, another pair of bimetal, Ti–6Al–4V/Ti-6242, was manufactured successfully by L-PBF, resulting in a solid and defect-free interface. Horizontal tensile tests were conducted, and the ultimate strength of the bimetal Ti–6Al–4V/Ti-6242 was 1314 ± 21 MPa. However, compared to single materials, the elongation of the bimetal was lowered to 2.8 ± 0.9% because of the mechanical incompatibility between Ti–6Al–4V and Ti-6242. Haiyang Fan appreciates the financial support of the China Scholarship Council (CSC) (No. 201606050132). Praxair Surface Technologies, Inc. (http://www.praxairsurfacetechnologies.com/en) is particularly appreciated for offering titanium powders in generous quantities. 2023-12-20T08:09:18Z 2023-12-20T08:09:18Z 2023 Journal Article Fan, H., Wang, C., Tian, Y., Zhou, K. & Yang, S. (2023). Laser powder bed fusion (L-PBF) of Ti–6Al–4V/Ti–6Al–2Sn–4Zr–2Mo and Ti–6Al–4V/γ-TiAl bimetals: processability, interface and mechanical properties. Materials Science and Engineering A, 871, 144907-. https://dx.doi.org/10.1016/j.msea.2023.144907 0921-5093 https://hdl.handle.net/10356/172806 10.1016/j.msea.2023.144907 2-s2.0-85150171201 871 144907 en Materials Science and Engineering A © 2023 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Materials Engineering::Mechanical engineering Laser Powder Bed Fusion Titanium Alloy Fan, Haiyang Wang, Chengcheng Tian, Yujia Zhou, Kun Yang, Shoufeng Laser powder bed fusion (L-PBF) of Ti–6Al–4V/Ti–6Al–2Sn–4Zr–2Mo and Ti–6Al–4V/γ-TiAl bimetals: processability, interface and mechanical properties |
| title | Laser powder bed fusion (L-PBF) of Ti–6Al–4V/Ti–6Al–2Sn–4Zr–2Mo and Ti–6Al–4V/γ-TiAl bimetals: processability, interface and mechanical properties |
| title_full | Laser powder bed fusion (L-PBF) of Ti–6Al–4V/Ti–6Al–2Sn–4Zr–2Mo and Ti–6Al–4V/γ-TiAl bimetals: processability, interface and mechanical properties |
| title_fullStr | Laser powder bed fusion (L-PBF) of Ti–6Al–4V/Ti–6Al–2Sn–4Zr–2Mo and Ti–6Al–4V/γ-TiAl bimetals: processability, interface and mechanical properties |
| title_full_unstemmed | Laser powder bed fusion (L-PBF) of Ti–6Al–4V/Ti–6Al–2Sn–4Zr–2Mo and Ti–6Al–4V/γ-TiAl bimetals: processability, interface and mechanical properties |
| title_short | Laser powder bed fusion (L-PBF) of Ti–6Al–4V/Ti–6Al–2Sn–4Zr–2Mo and Ti–6Al–4V/γ-TiAl bimetals: processability, interface and mechanical properties |
| title_sort | laser powder bed fusion l pbf of ti 6al 4v ti 6al 2sn 4zr 2mo and ti 6al 4v γ tial bimetals processability interface and mechanical properties |
| topic | Engineering::Materials Engineering::Mechanical engineering Laser Powder Bed Fusion Titanium Alloy |
| url | https://hdl.handle.net/10356/172806 |
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