Crystallization of Zr-Based Amorphous Alloys in Laser Welding
Crystallization often occurs in the laser welding of amorphous alloys, reducing the properties of amorphous alloys. Therefore, the research in this thesis focuses on the experimental selection of suitable welding parameters to prevent crystallization of Zr-based amorphous alloys during the laser wel...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-07-01
|
| Series: | Metals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4701/13/7/1283 |
| _version_ | 1797588294051037184 |
|---|---|
| author | Shiju Yan Chengli Song Lingling Huang Liang Han Chengyong Wang |
| author_facet | Shiju Yan Chengli Song Lingling Huang Liang Han Chengyong Wang |
| author_sort | Shiju Yan |
| collection | DOAJ |
| description | Crystallization often occurs in the laser welding of amorphous alloys, reducing the properties of amorphous alloys. Therefore, the research in this thesis focuses on the experimental selection of suitable welding parameters to prevent crystallization of Zr-based amorphous alloys during the laser welding process. As such, it is necessary to simulate the temperature field curve of the welding area by computer and then determine the power and laser moving speed of laser welding. In this paper, the temperature field curve of the Zr<sub>41.2</sub>Ti<sub>13.8</sub>Cu<sub>12.5</sub>Ni<sub>10</sub>Be<sub>22.5</sub> (Vit1) amorphous alloy in laser welding is obtained by finite element analysis. The continuous heating curve (CHT) of Vit1 is fitted by the Vogel–Fulcher–Tammann (VFT) equation and the Kissinger equation. If the temperature field curve intersects with the CHT curve, crystallization occurs. The experiment results show that the VFT equation can be used to predict the crystallization of Vit1 better in laser welding. The temperature and welding time are increased by using a low welding speed. Therefore, the temperature of the weld zone cannot fall in time, resulting in the intersection of the temperature field curve and the CHT curve. Thus, crystallization can be avoided if the welding speed is controlled within a reasonable range, and the highest temperature is kept under the CHT curve. The combination of the CHT curve and the temperature field curve shows that the samples at 300 W-3 mm/s and 300 W-6 mm/s welding parameters all undergo crystallization, while the samples at 300 W-9 mm/s and 300 W-12 mm/s welding parameters do not undergo crystallization. Through the flexural test, it is found that the flexural strength of the welded interface is at its the maximum under 300 W-9 mm/s. |
| first_indexed | 2024-03-11T00:49:54Z |
| format | Article |
| id | doaj.art-7975ec3e0b454335b99eb7fd5c29dad9 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-11T00:49:54Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-7975ec3e0b454335b99eb7fd5c29dad92023-11-18T20:30:31ZengMDPI AGMetals2075-47012023-07-01137128310.3390/met13071283Crystallization of Zr-Based Amorphous Alloys in Laser WeldingShiju Yan0Chengli Song1Lingling Huang2Liang Han3Chengyong Wang4School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaSchool of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaSchool of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaSchool of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaInstitute of Manufacturing Technology, Guangdong University of Technology, Guangzhou 510006, ChinaCrystallization often occurs in the laser welding of amorphous alloys, reducing the properties of amorphous alloys. Therefore, the research in this thesis focuses on the experimental selection of suitable welding parameters to prevent crystallization of Zr-based amorphous alloys during the laser welding process. As such, it is necessary to simulate the temperature field curve of the welding area by computer and then determine the power and laser moving speed of laser welding. In this paper, the temperature field curve of the Zr<sub>41.2</sub>Ti<sub>13.8</sub>Cu<sub>12.5</sub>Ni<sub>10</sub>Be<sub>22.5</sub> (Vit1) amorphous alloy in laser welding is obtained by finite element analysis. The continuous heating curve (CHT) of Vit1 is fitted by the Vogel–Fulcher–Tammann (VFT) equation and the Kissinger equation. If the temperature field curve intersects with the CHT curve, crystallization occurs. The experiment results show that the VFT equation can be used to predict the crystallization of Vit1 better in laser welding. The temperature and welding time are increased by using a low welding speed. Therefore, the temperature of the weld zone cannot fall in time, resulting in the intersection of the temperature field curve and the CHT curve. Thus, crystallization can be avoided if the welding speed is controlled within a reasonable range, and the highest temperature is kept under the CHT curve. The combination of the CHT curve and the temperature field curve shows that the samples at 300 W-3 mm/s and 300 W-6 mm/s welding parameters all undergo crystallization, while the samples at 300 W-9 mm/s and 300 W-12 mm/s welding parameters do not undergo crystallization. Through the flexural test, it is found that the flexural strength of the welded interface is at its the maximum under 300 W-9 mm/s.https://www.mdpi.com/2075-4701/13/7/1283amorphous alloyfinite element analysiscrystallization predictionlaser welding |
| spellingShingle | Shiju Yan Chengli Song Lingling Huang Liang Han Chengyong Wang Crystallization of Zr-Based Amorphous Alloys in Laser Welding Metals amorphous alloy finite element analysis crystallization prediction laser welding |
| title | Crystallization of Zr-Based Amorphous Alloys in Laser Welding |
| title_full | Crystallization of Zr-Based Amorphous Alloys in Laser Welding |
| title_fullStr | Crystallization of Zr-Based Amorphous Alloys in Laser Welding |
| title_full_unstemmed | Crystallization of Zr-Based Amorphous Alloys in Laser Welding |
| title_short | Crystallization of Zr-Based Amorphous Alloys in Laser Welding |
| title_sort | crystallization of zr based amorphous alloys in laser welding |
| topic | amorphous alloy finite element analysis crystallization prediction laser welding |
| url | https://www.mdpi.com/2075-4701/13/7/1283 |
| work_keys_str_mv | AT shijuyan crystallizationofzrbasedamorphousalloysinlaserwelding AT chenglisong crystallizationofzrbasedamorphousalloysinlaserwelding AT linglinghuang crystallizationofzrbasedamorphousalloysinlaserwelding AT lianghan crystallizationofzrbasedamorphousalloysinlaserwelding AT chengyongwang crystallizationofzrbasedamorphousalloysinlaserwelding |