Effect of Shielding Gas on Microstructures and Mechanical Properties of TC4 Titanium Alloy Ultranarrow Gap Welded Joint by Laser Welding with Filler Wire
A 20 mm thick TC4 titanium alloy plate was welded by ultranarrow gap laser welding with filler wire with Ar and He as shielding gas, respectively. A characterization analysis of the microstructures and mechanical properties of the welded joint was conducted with OM, SEM, XRD, and EBSD and through th...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/9582421 |
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| author | Naiwen Fang Erjun Guo Kai Xu Ruisheng Huang Yiming Ma Caiyou Zeng Yicheng Yang Jilin Xie Hao Cao |
| author_facet | Naiwen Fang Erjun Guo Kai Xu Ruisheng Huang Yiming Ma Caiyou Zeng Yicheng Yang Jilin Xie Hao Cao |
| author_sort | Naiwen Fang |
| collection | DOAJ |
| description | A 20 mm thick TC4 titanium alloy plate was welded by ultranarrow gap laser welding with filler wire with Ar and He as shielding gas, respectively. A characterization analysis of the microstructures and mechanical properties of the welded joint was conducted with OM, SEM, XRD, and EBSD and through the microhardness test and tensile test. The results showed that HAZ of the welded joint formed with Ar as shielding gas was much wider than that with He, and weld microstructure composition with the two shielding gases was basically consistent; phase boundary of the weld metal obtained with Ar was clearer, with a larger misorientation between the laths; α′ martensite lath in weld metal prepared with He showed obvious preferred orientation distribution, and α′ martensite microstructure was much finer; the misorientation of α′ phase grain boundary of weld microstructure prepared with Ar was slightly less distributed in high angle grain boundary than that with He; tensile property of the welded joint prepared with He was better than that with Ar; the hardness of each zone of welded joint prepared with He was less fluctuated and the hardness value measured was slightly higher than that with Ar. |
| format | Article |
| id | doaj-art-86607b82ccbf45c9b40e67a9833d3a42 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-86607b82ccbf45c9b40e67a9833d3a422025-02-03T01:24:50ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422021-01-01202110.1155/2021/95824219582421Effect of Shielding Gas on Microstructures and Mechanical Properties of TC4 Titanium Alloy Ultranarrow Gap Welded Joint by Laser Welding with Filler WireNaiwen Fang0Erjun Guo1Kai Xu2Ruisheng Huang3Yiming Ma4Caiyou Zeng5Yicheng Yang6Jilin Xie7Hao Cao8Harbin University of Science and Technology, Harbin 150080, ChinaHarbin University of Science and Technology, Harbin 150080, ChinaHarbin Welding Institute Limited Company, Harbin 150028, ChinaHarbin Welding Institute Limited Company, Harbin 150028, ChinaHarbin Welding Institute Limited Company, Harbin 150028, ChinaChina-Ukraine E.O. Paton Institute of Welding, Guangzhou 510651, ChinaHarbin Welding Institute Limited Company, Harbin 150028, ChinaNanchang Hangkong University, Nanchang 330063, ChinaHarbin Welding Institute Limited Company, Harbin 150028, ChinaA 20 mm thick TC4 titanium alloy plate was welded by ultranarrow gap laser welding with filler wire with Ar and He as shielding gas, respectively. A characterization analysis of the microstructures and mechanical properties of the welded joint was conducted with OM, SEM, XRD, and EBSD and through the microhardness test and tensile test. The results showed that HAZ of the welded joint formed with Ar as shielding gas was much wider than that with He, and weld microstructure composition with the two shielding gases was basically consistent; phase boundary of the weld metal obtained with Ar was clearer, with a larger misorientation between the laths; α′ martensite lath in weld metal prepared with He showed obvious preferred orientation distribution, and α′ martensite microstructure was much finer; the misorientation of α′ phase grain boundary of weld microstructure prepared with Ar was slightly less distributed in high angle grain boundary than that with He; tensile property of the welded joint prepared with He was better than that with Ar; the hardness of each zone of welded joint prepared with He was less fluctuated and the hardness value measured was slightly higher than that with Ar.http://dx.doi.org/10.1155/2021/9582421 |
| spellingShingle | Naiwen Fang Erjun Guo Kai Xu Ruisheng Huang Yiming Ma Caiyou Zeng Yicheng Yang Jilin Xie Hao Cao Effect of Shielding Gas on Microstructures and Mechanical Properties of TC4 Titanium Alloy Ultranarrow Gap Welded Joint by Laser Welding with Filler Wire Advances in Materials Science and Engineering |
| title | Effect of Shielding Gas on Microstructures and Mechanical Properties of TC4 Titanium Alloy Ultranarrow Gap Welded Joint by Laser Welding with Filler Wire |
| title_full | Effect of Shielding Gas on Microstructures and Mechanical Properties of TC4 Titanium Alloy Ultranarrow Gap Welded Joint by Laser Welding with Filler Wire |
| title_fullStr | Effect of Shielding Gas on Microstructures and Mechanical Properties of TC4 Titanium Alloy Ultranarrow Gap Welded Joint by Laser Welding with Filler Wire |
| title_full_unstemmed | Effect of Shielding Gas on Microstructures and Mechanical Properties of TC4 Titanium Alloy Ultranarrow Gap Welded Joint by Laser Welding with Filler Wire |
| title_short | Effect of Shielding Gas on Microstructures and Mechanical Properties of TC4 Titanium Alloy Ultranarrow Gap Welded Joint by Laser Welding with Filler Wire |
| title_sort | effect of shielding gas on microstructures and mechanical properties of tc4 titanium alloy ultranarrow gap welded joint by laser welding with filler wire |
| url | http://dx.doi.org/10.1155/2021/9582421 |
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