Crystallization and Hardness Change of the Ti-Based Bulk Metallic Glass Manufactured by a Laser Powder Bed Fusion Process
Ti-2.5Zr-5.0Hf-37.5Cu-7.5Ni-1.0Si-5.0Sn (at.%) BMG has been successfully manufactured in amorphous powder with a size of about 25 μm (D<sub>50</sub>). Using this amorphous powder, a Ti-based BMG was manufactured by an additive manufacturing process based on a laser powder bed fusion (LPB...
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MDPI AG
2021-06-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/7/1049 |
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| author | Ji-Hoon Jang Hyung-Guin Kim Hwi-Jun Kim Dong-Geun Lee |
| author_facet | Ji-Hoon Jang Hyung-Guin Kim Hwi-Jun Kim Dong-Geun Lee |
| author_sort | Ji-Hoon Jang |
| collection | DOAJ |
| description | Ti-2.5Zr-5.0Hf-37.5Cu-7.5Ni-1.0Si-5.0Sn (at.%) BMG has been successfully manufactured in amorphous powder with a size of about 25 μm (D<sub>50</sub>). Using this amorphous powder, a Ti-based BMG was manufactured by an additive manufacturing process based on a laser powder bed fusion (LPBF) technique. In 3D printing processes using amorphous powders, it is necessary and important to understand the crystallization behavior due to the difference in energy density applied to the powders. An LPBF process has been carried out with various energy density conditions to minimize the inner defects and identify the sound mechanical properties of 3D-printed BMG parts. At the lowest energy density condition (3.0 J/mm<sup>3</sup>), the most pores were generated. Even if the same energy density (3.0 J/mm<sup>3</sup>) was applied, the rapid laser movement caused many pores to form inside the material. The relatively sound 3D-printed Ti-based BMG was successfully fabricated with a size of about 5 mm × 5 mm × 3 mm. Peaks at 41° and 44° showing crystallization were observed in all conditions. The higher the laser power was, the greater each peak intensity and the more crystallization (CuTi, Ti<sub>3</sub>Cu<sub>4</sub>, etc.) was present in the BMG, and the higher the scan speed, the more the internal defects were found. |
| first_indexed | 2024-03-09T04:43:25Z |
| format | Article |
| id | doaj.art-e0beb8c21e99440394e68f031594013e |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T04:43:25Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-e0beb8c21e99440394e68f031594013e2023-12-03T13:18:21ZengMDPI AGMetals2075-47012021-06-01117104910.3390/met11071049Crystallization and Hardness Change of the Ti-Based Bulk Metallic Glass Manufactured by a Laser Powder Bed Fusion ProcessJi-Hoon Jang0Hyung-Guin Kim1Hwi-Jun Kim2Dong-Geun Lee3Department of Materials Science and Metallurgical Engineering, Sunchon National University, Suncheon 57922, KoreaGangwon Regional Division, Korea Institute of Industrial Technology, Gangwon 25440, KoreaIncheon Regional Division, Korea Institute of Industrial Technology, Incheon 21999, KoreaDepartment of Materials Science and Metallurgical Engineering, Sunchon National University, Suncheon 57922, KoreaTi-2.5Zr-5.0Hf-37.5Cu-7.5Ni-1.0Si-5.0Sn (at.%) BMG has been successfully manufactured in amorphous powder with a size of about 25 μm (D<sub>50</sub>). Using this amorphous powder, a Ti-based BMG was manufactured by an additive manufacturing process based on a laser powder bed fusion (LPBF) technique. In 3D printing processes using amorphous powders, it is necessary and important to understand the crystallization behavior due to the difference in energy density applied to the powders. An LPBF process has been carried out with various energy density conditions to minimize the inner defects and identify the sound mechanical properties of 3D-printed BMG parts. At the lowest energy density condition (3.0 J/mm<sup>3</sup>), the most pores were generated. Even if the same energy density (3.0 J/mm<sup>3</sup>) was applied, the rapid laser movement caused many pores to form inside the material. The relatively sound 3D-printed Ti-based BMG was successfully fabricated with a size of about 5 mm × 5 mm × 3 mm. Peaks at 41° and 44° showing crystallization were observed in all conditions. The higher the laser power was, the greater each peak intensity and the more crystallization (CuTi, Ti<sub>3</sub>Cu<sub>4</sub>, etc.) was present in the BMG, and the higher the scan speed, the more the internal defects were found.https://www.mdpi.com/2075-4701/11/7/1049titanium amorphous powderbulk metallic glassadditive manufacturinglaser powder bed fusioncrystallization |
| spellingShingle | Ji-Hoon Jang Hyung-Guin Kim Hwi-Jun Kim Dong-Geun Lee Crystallization and Hardness Change of the Ti-Based Bulk Metallic Glass Manufactured by a Laser Powder Bed Fusion Process Metals titanium amorphous powder bulk metallic glass additive manufacturing laser powder bed fusion crystallization |
| title | Crystallization and Hardness Change of the Ti-Based Bulk Metallic Glass Manufactured by a Laser Powder Bed Fusion Process |
| title_full | Crystallization and Hardness Change of the Ti-Based Bulk Metallic Glass Manufactured by a Laser Powder Bed Fusion Process |
| title_fullStr | Crystallization and Hardness Change of the Ti-Based Bulk Metallic Glass Manufactured by a Laser Powder Bed Fusion Process |
| title_full_unstemmed | Crystallization and Hardness Change of the Ti-Based Bulk Metallic Glass Manufactured by a Laser Powder Bed Fusion Process |
| title_short | Crystallization and Hardness Change of the Ti-Based Bulk Metallic Glass Manufactured by a Laser Powder Bed Fusion Process |
| title_sort | crystallization and hardness change of the ti based bulk metallic glass manufactured by a laser powder bed fusion process |
| topic | titanium amorphous powder bulk metallic glass additive manufacturing laser powder bed fusion crystallization |
| url | https://www.mdpi.com/2075-4701/11/7/1049 |
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