Wire arc additive manufacturing of Al-6Mg alloy using variable polarity cold metal transfer arc as power source
A variable polarity cold metal transfer (VP-CMT) arc power source with different arc modes was employed in additive manufacturing Al-6Mg alloy parts. The microstructures were characterized using scanning electron microscopy with electron back-scattered diffraction. Even equiaxed grains in size of 20...
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| Veröffentlicht in: | Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2018-01, Vol.711, p.415-423 |
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| container_title | Materials science & engineering. A, Structural materials : properties, microstructure and processing |
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| creator | Zhang, Chen Li, Yufei Gao, Ming Zeng, Xiaoyan |
| description | A variable polarity cold metal transfer (VP-CMT) arc power source with different arc modes was employed in additive manufacturing Al-6Mg alloy parts. The microstructures were characterized using scanning electron microscopy with electron back-scattered diffraction. Even equiaxed grains in size of 20.6-28.5 μm with random orientation were obtained under VP-CMT mode, while a large number of columnar grains in bigger size exist in samples under other arc modes. Tensile strength of the VP-CMT sample with a maximum of 333 MPa is higher than that of the Al-6Mg wrought alloys due to fine-grain strengthening. However, the tensile strength of the VP-CMT sample in different tensile direction was anisotropic, with a percentage of 8-27%. The comprehensive analysis of defects and grain orientation showed that the micro pores in interlayer pore region lead to the anisotropy. |
| doi_str_mv | 10.1016/j.msea.2017.11.084 |
| format | Article |
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The microstructures were characterized using scanning electron microscopy with electron back-scattered diffraction. Even equiaxed grains in size of 20.6-28.5 μm with random orientation were obtained under VP-CMT mode, while a large number of columnar grains in bigger size exist in samples under other arc modes. Tensile strength of the VP-CMT sample with a maximum of 333 MPa is higher than that of the Al-6Mg wrought alloys due to fine-grain strengthening. However, the tensile strength of the VP-CMT sample in different tensile direction was anisotropic, with a percentage of 8-27%. The comprehensive analysis of defects and grain orientation showed that the micro pores in interlayer pore region lead to the anisotropy.</description><identifier>ISSN: 0921-5093</identifier><identifier>EISSN: 1873-4936</identifier><identifier>DOI: 10.1016/j.msea.2017.11.084</identifier><language>eng</language><publisher>Lausanne: Elsevier BV</publisher><subject>Additive manufacturing ; Alloys ; Anisotropy ; Crystal defects ; Diffraction ; Electron microscopy ; Grain orientation ; Interlayers ; Polarity ; Scanning electron microscopy ; Tensile strength ; Wrought alloys</subject><ispartof>Materials science & engineering. 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A, Structural materials : properties, microstructure and processing</title><description>A variable polarity cold metal transfer (VP-CMT) arc power source with different arc modes was employed in additive manufacturing Al-6Mg alloy parts. The microstructures were characterized using scanning electron microscopy with electron back-scattered diffraction. Even equiaxed grains in size of 20.6-28.5 μm with random orientation were obtained under VP-CMT mode, while a large number of columnar grains in bigger size exist in samples under other arc modes. Tensile strength of the VP-CMT sample with a maximum of 333 MPa is higher than that of the Al-6Mg wrought alloys due to fine-grain strengthening. However, the tensile strength of the VP-CMT sample in different tensile direction was anisotropic, with a percentage of 8-27%. The comprehensive analysis of defects and grain orientation showed that the micro pores in interlayer pore region lead to the anisotropy.</description><subject>Additive manufacturing</subject><subject>Alloys</subject><subject>Anisotropy</subject><subject>Crystal defects</subject><subject>Diffraction</subject><subject>Electron microscopy</subject><subject>Grain orientation</subject><subject>Interlayers</subject><subject>Polarity</subject><subject>Scanning electron microscopy</subject><subject>Tensile strength</subject><subject>Wrought alloys</subject><issn>0921-5093</issn><issn>1873-4936</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNotkEtLxDAUhYMoOI7-AVcB1615tWmWw-ALRtwoLsNtmg4taTMm7cj8e1PG1b33cO458CF0T0lOCS0f-3yIFnJGqMwpzUklLtCKVpJnQvHyEq2IYjQriOLX6CbGnhBCBSlWyH93wWIIBkPTdFN3tHiAcW7BTHPoxj32Ld64rHzfY3DOn_AcF_UIoYPaWXzwLq3TCRvvGjzYCRyeAoyxteEcG5PnNx3Rz8HYW3TVgov27n-u0dfz0-f2Ndt9vLxtN7vMcCamDBTUVpWy4EXdlEawQnAhlSqIFWVTK8OEklzYojBAheQgSN1UQoAwNTCm-Bo9nHMPwf_MNk66T_1jqtQJEqu4krRKLnZ2meBjDLbVh9ANEE6aEr2A1b1ewC4_UlOqE1j-B-QLbWI</recordid><startdate>20180110</startdate><enddate>20180110</enddate><creator>Zhang, Chen</creator><creator>Li, Yufei</creator><creator>Gao, Ming</creator><creator>Zeng, Xiaoyan</creator><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20180110</creationdate><title>Wire arc additive manufacturing of Al-6Mg alloy using variable polarity cold metal transfer arc as power source</title><author>Zhang, Chen ; Li, Yufei ; Gao, Ming ; Zeng, Xiaoyan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c324t-a9abe967535bd6c42543479950e46db9c249734e55ca1473a40bd844a4cba2293</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Additive manufacturing</topic><topic>Alloys</topic><topic>Anisotropy</topic><topic>Crystal defects</topic><topic>Diffraction</topic><topic>Electron microscopy</topic><topic>Grain orientation</topic><topic>Interlayers</topic><topic>Polarity</topic><topic>Scanning electron microscopy</topic><topic>Tensile strength</topic><topic>Wrought alloys</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zhang, Chen</creatorcontrib><creatorcontrib>Li, Yufei</creatorcontrib><creatorcontrib>Gao, Ming</creatorcontrib><creatorcontrib>Zeng, Xiaoyan</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Materials science & engineering. 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The microstructures were characterized using scanning electron microscopy with electron back-scattered diffraction. Even equiaxed grains in size of 20.6-28.5 μm with random orientation were obtained under VP-CMT mode, while a large number of columnar grains in bigger size exist in samples under other arc modes. Tensile strength of the VP-CMT sample with a maximum of 333 MPa is higher than that of the Al-6Mg wrought alloys due to fine-grain strengthening. However, the tensile strength of the VP-CMT sample in different tensile direction was anisotropic, with a percentage of 8-27%. The comprehensive analysis of defects and grain orientation showed that the micro pores in interlayer pore region lead to the anisotropy.</abstract><cop>Lausanne</cop><pub>Elsevier BV</pub><doi>10.1016/j.msea.2017.11.084</doi><tpages>9</tpages></addata></record> |
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| issn | 0921-5093 1873-4936 |
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| source | Access via ScienceDirect (Elsevier) |
| subjects | Additive manufacturing Alloys Anisotropy Crystal defects Diffraction Electron microscopy Grain orientation Interlayers Polarity Scanning electron microscopy Tensile strength Wrought alloys |
| title | Wire arc additive manufacturing of Al-6Mg alloy using variable polarity cold metal transfer arc as power source |
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