Effect of Cu/Ni foil interlayer on microstructure and mechanical properties of laser welded aluminum/steel joints
Laser welding of aluminum/steel dissimilar metals with Ni and Ni/Cu foils as intermediate layers was studied in this paper. The effect of Cu/Ni foil on microstructure and properties of dissimilar laser welded aluminum/steel joints was systematically investigated. Scanning electron microscope (SEM) a...
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| Format: | Article |
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Journal of Aeronautical Materials
2020-04-01
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| Series: | Journal of Aeronautical Materials |
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| Online Access: | http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2019.000133 |
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| author | CAO Xuelong WANG Gang XING Chang TAN Caiwang JIANG Junjun |
| author_facet | CAO Xuelong WANG Gang XING Chang TAN Caiwang JIANG Junjun |
| author_sort | CAO Xuelong |
| collection | DOAJ |
| description | Laser welding of aluminum/steel dissimilar metals with Ni and Ni/Cu foils as intermediate layers was studied in this paper. The effect of Cu/Ni foil on microstructure and properties of dissimilar laser welded aluminum/steel joints was systematically investigated. Scanning electron microscope (SEM) and its own energy dispersive spectrometer (EDS) were used to observe and analyze the microstructure of the weld cross section and the element distribution in each area. X-ray diffractometer (XRD) was used to analyze the main phase of the welded joint, and tensile testing of welded joints using an electronic universal testing machine to characterize its mechanical properties. The results show that the tensile strength of the welded joint is greatly improved when Cu/Ni foil is added, compared with Ni foil as the interlayer only. The most obvious effect is that Cu foil with a thickness of 0.02 mm is added. The addition of Cu foil changes the phase composition, element distribution and microstructure of the aluminum/steel interface, and increases the fluidity of the molten pool. In the brittle phase of Fe-Al near the stainless steel side, some Fe atoms are replaced by Cu and Ni to form a new ternary ductile phase, which inhibits the generation of Fe-Al binary brittle intermetallic compounds and effectively improves the weldability of aluminum/steel. Therefore, the addition of Cu/Ni foil can effectively improve the metallurgical reaction in the process of aluminum/steel dissimilar laser welding, so as to improve the mechanical properties of welded joints. |
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| issn | 1005-5053 1005-5053 |
| language | zho |
| last_indexed | 2024-12-14T05:19:18Z |
| publishDate | 2020-04-01 |
| publisher | Journal of Aeronautical Materials |
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| series | Journal of Aeronautical Materials |
| spelling | doaj.art-4a6e83d4cd9142e78b9d1aa7d8d3e3212022-12-21T23:15:43ZzhoJournal of Aeronautical MaterialsJournal of Aeronautical Materials1005-50531005-50532020-04-01402707810.11868/j.issn.1005-5053.2019.0001332019-0133Effect of Cu/Ni foil interlayer on microstructure and mechanical properties of laser welded aluminum/steel jointsCAO Xuelong0WANG Gang1XING Chang2TAN Caiwang3JIANG Junjun4School of Mechanical and Automotive Engineering，Anhui Polytechnic University，Wuhu 241000，Anhui ，ChinaSchool of Mechanical and Automotive Engineering，Anhui Polytechnic University，Wuhu 241000，Anhui ，ChinaSchool of Mechanical and Automotive Engineering，Anhui Polytechnic University，Wuhu 241000，Anhui ，ChinaSchool of Material Science and Engineering，Harbin Institute of Technology（Weihai），Weihai 264209，Shandong，ChinaSchool of Material Science and Engineering，Harbin Institute of Technology（Weihai），Weihai 264209，Shandong，ChinaLaser welding of aluminum/steel dissimilar metals with Ni and Ni/Cu foils as intermediate layers was studied in this paper. The effect of Cu/Ni foil on microstructure and properties of dissimilar laser welded aluminum/steel joints was systematically investigated. Scanning electron microscope (SEM) and its own energy dispersive spectrometer (EDS) were used to observe and analyze the microstructure of the weld cross section and the element distribution in each area. X-ray diffractometer (XRD) was used to analyze the main phase of the welded joint, and tensile testing of welded joints using an electronic universal testing machine to characterize its mechanical properties. The results show that the tensile strength of the welded joint is greatly improved when Cu/Ni foil is added, compared with Ni foil as the interlayer only. The most obvious effect is that Cu foil with a thickness of 0.02 mm is added. The addition of Cu foil changes the phase composition, element distribution and microstructure of the aluminum/steel interface, and increases the fluidity of the molten pool. In the brittle phase of Fe-Al near the stainless steel side, some Fe atoms are replaced by Cu and Ni to form a new ternary ductile phase, which inhibits the generation of Fe-Al binary brittle intermetallic compounds and effectively improves the weldability of aluminum/steel. Therefore, the addition of Cu/Ni foil can effectively improve the metallurgical reaction in the process of aluminum/steel dissimilar laser welding, so as to improve the mechanical properties of welded joints.http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2019.000133aluminum/steel dissimilar metalsinterlayerlaser weldingintermetallic compoundmechanical property |
| spellingShingle | CAO Xuelong WANG Gang XING Chang TAN Caiwang JIANG Junjun Effect of Cu/Ni foil interlayer on microstructure and mechanical properties of laser welded aluminum/steel joints Journal of Aeronautical Materials aluminum/steel dissimilar metals interlayer laser welding intermetallic compound mechanical property |
| title | Effect of Cu/Ni foil interlayer on microstructure and mechanical properties of laser welded aluminum/steel joints |
| title_full | Effect of Cu/Ni foil interlayer on microstructure and mechanical properties of laser welded aluminum/steel joints |
| title_fullStr | Effect of Cu/Ni foil interlayer on microstructure and mechanical properties of laser welded aluminum/steel joints |
| title_full_unstemmed | Effect of Cu/Ni foil interlayer on microstructure and mechanical properties of laser welded aluminum/steel joints |
| title_short | Effect of Cu/Ni foil interlayer on microstructure and mechanical properties of laser welded aluminum/steel joints |
| title_sort | effect of cu ni foil interlayer on microstructure and mechanical properties of laser welded aluminum steel joints |
| topic | aluminum/steel dissimilar metals interlayer laser welding intermetallic compound mechanical property |
| url | http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2019.000133 |
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