Phase Transformation, Microstructures, and Mechanical Properties of α + β Two-Phase Titanium Alloy Deposited Metal by Surfacing Welding
The effect of cooling rate on phase transformation, microstructures, and mechanical properties of TC4 titanium alloy deposited metal by laser surfacing welding with filler wire was investigated by in situ observation with a high-temperature laser confocal microscope, XRD, SEM, and through microhardn...
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2022/6415091 |
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| author | Naiwen Fang Ruisheng Huang Kai Xu Tianli Zhang Pengbo Wu Yiming Ma Hao Cao Jian Qin Jipeng Zou |
| author_facet | Naiwen Fang Ruisheng Huang Kai Xu Tianli Zhang Pengbo Wu Yiming Ma Hao Cao Jian Qin Jipeng Zou |
| author_sort | Naiwen Fang |
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| description | The effect of cooling rate on phase transformation, microstructures, and mechanical properties of TC4 titanium alloy deposited metal by laser surfacing welding with filler wire was investigated by in situ observation with a high-temperature laser confocal microscope, XRD, SEM, and through microhardness test. The results showed that primary α phase began to appear at grain boundaries when the deposited metal was heated to 890.5°C, and microstructures were all composed of coarse β columnar grains after the temperature was raised to 1 190.2°C; with the increase of cooling rate during the cooling process, temperature for starting new phase transformation decreased from 943.7°C to 811.1°C, and temperature for ending the transformation increased gradually from 708.0°C to 736.2°C; when cooled to room temperature at a rate of 1°C/s, microstructures consisted of α phase; at a rate of 15°C/s, acicular α′ martensite appeared in the microstructures; at 100°C/s, the microstructures were completely comprised by acicular α′ martensite; when the cooling rate was low, V element would be slightly precipitated from αgb into the matrix; when cooling turned faster, V element had no time to enter the matrix by diffusion, so it became uniformly distributed; as the cooling rate getting faster, lamellar microstructures became thinner gradually, and microhardness of the deposited metal was improved in a gradual manner. |
| format | Article |
| id | doaj-art-2ef3e8328e1243b9ad213e665762ee17 |
| institution | Kabale University |
| issn | 1687-8442 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-2ef3e8328e1243b9ad213e665762ee172025-02-03T01:32:34ZengWileyAdvances in Materials Science and Engineering1687-84422022-01-01202210.1155/2022/6415091Phase Transformation, Microstructures, and Mechanical Properties of α + β Two-Phase Titanium Alloy Deposited Metal by Surfacing WeldingNaiwen Fang0Ruisheng Huang1Kai Xu2Tianli Zhang3Pengbo Wu4Yiming Ma5Hao Cao6Jian Qin7Jipeng Zou8Harbin Welding Institute Limited CompanyHarbin Welding Institute Limited CompanyHarbin Welding Institute Limited CompanySchool of Material EngineeringHarbin Welding Institute Limited CompanyHarbin Welding Institute Limited CompanyHarbin Welding Institute Limited CompanyState Key Laboratory of New Brazing Materials and TechnologyHarbin Welding Institute Limited CompanyThe effect of cooling rate on phase transformation, microstructures, and mechanical properties of TC4 titanium alloy deposited metal by laser surfacing welding with filler wire was investigated by in situ observation with a high-temperature laser confocal microscope, XRD, SEM, and through microhardness test. The results showed that primary α phase began to appear at grain boundaries when the deposited metal was heated to 890.5°C, and microstructures were all composed of coarse β columnar grains after the temperature was raised to 1 190.2°C; with the increase of cooling rate during the cooling process, temperature for starting new phase transformation decreased from 943.7°C to 811.1°C, and temperature for ending the transformation increased gradually from 708.0°C to 736.2°C; when cooled to room temperature at a rate of 1°C/s, microstructures consisted of α phase; at a rate of 15°C/s, acicular α′ martensite appeared in the microstructures; at 100°C/s, the microstructures were completely comprised by acicular α′ martensite; when the cooling rate was low, V element would be slightly precipitated from αgb into the matrix; when cooling turned faster, V element had no time to enter the matrix by diffusion, so it became uniformly distributed; as the cooling rate getting faster, lamellar microstructures became thinner gradually, and microhardness of the deposited metal was improved in a gradual manner.http://dx.doi.org/10.1155/2022/6415091 |
| spellingShingle | Naiwen Fang Ruisheng Huang Kai Xu Tianli Zhang Pengbo Wu Yiming Ma Hao Cao Jian Qin Jipeng Zou Phase Transformation, Microstructures, and Mechanical Properties of α + β Two-Phase Titanium Alloy Deposited Metal by Surfacing Welding Advances in Materials Science and Engineering |
| title | Phase Transformation, Microstructures, and Mechanical Properties of α + β Two-Phase Titanium Alloy Deposited Metal by Surfacing Welding |
| title_full | Phase Transformation, Microstructures, and Mechanical Properties of α + β Two-Phase Titanium Alloy Deposited Metal by Surfacing Welding |
| title_fullStr | Phase Transformation, Microstructures, and Mechanical Properties of α + β Two-Phase Titanium Alloy Deposited Metal by Surfacing Welding |
| title_full_unstemmed | Phase Transformation, Microstructures, and Mechanical Properties of α + β Two-Phase Titanium Alloy Deposited Metal by Surfacing Welding |
| title_short | Phase Transformation, Microstructures, and Mechanical Properties of α + β Two-Phase Titanium Alloy Deposited Metal by Surfacing Welding |
| title_sort | phase transformation microstructures and mechanical properties of α β two phase titanium alloy deposited metal by surfacing welding |
| url | http://dx.doi.org/10.1155/2022/6415091 |
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