Influence of stacking-fault energy on the accommodation of severe shear strain in Cu-Al alloys during equal-channel angular pressing
X-ray diffraction (XRD) and transmission electron microscope (TEM) investigations have been carried out to decode the influence of stacking-fault energy (SFE) on the accommodation of large shear deformation in Cu-Al alloys subjected to one-pass equal-channel angular pressing. XRD results exhibit tha...
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| Veröffentlicht in: | Journal of materials research 2009-12, Vol.24 (12), p.3636-3646 |
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| creator | An, Xianghai Lin, Qingyun Qu, Shen Yang, Gang Wu, Shiding Zhang, Zhe-Feng |
| description | X-ray diffraction (XRD) and transmission electron microscope (TEM) investigations have been carried out to decode the influence of stacking-fault energy (SFE) on the accommodation of large shear deformation in Cu-Al alloys subjected to one-pass equal-channel angular pressing. XRD results exhibit that the microstrain and density of dislocations initially increased with the reduction in the SFE, whereas they sharply decreased with a further decrease in SFE. By systematic TEM observations, we noticed that the accommodation mechanism of intense shear strain was gradually transformed from dislocation slip to deformation twin when SFE was lowered. Meanwhile, twin intersections and internal twins were also observed in the Cu-Al alloy with extremely low SFE. Due to the large external plastic deformation, microscale shear bands, as an inherent deformation mechanism, are increasingly significant to help carry the high local plasticity because low SFE facilitates the formation of shear bands. |
| doi_str_mv | 10.1557/jmr.2009.0426 |
| format | Article |
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XRD results exhibit that the microstrain and density of dislocations initially increased with the reduction in the SFE, whereas they sharply decreased with a further decrease in SFE. By systematic TEM observations, we noticed that the accommodation mechanism of intense shear strain was gradually transformed from dislocation slip to deformation twin when SFE was lowered. Meanwhile, twin intersections and internal twins were also observed in the Cu-Al alloy with extremely low SFE. 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Due to the large external plastic deformation, microscale shear bands, as an inherent deformation mechanism, are increasingly significant to help carry the high local plasticity because low SFE facilitates the formation of shear bands.</description><subject>Alloy</subject><subject>Applied and Technical Physics</subject><subject>Biomaterials</subject><subject>Cold working</subject><subject>Inorganic Chemistry</subject><subject>Materials Engineering</subject><subject>Materials Science</subject><subject>Microstructure</subject><subject>Nanotechnology</subject><issn>0884-2914</issn><issn>2044-5326</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNqFkMGP1CAUxonRxHH16J2TN2aBAu0cNxNdN26yMVHjjbzS15nOUjoLxTh3_3BpZuLNbAIh8H7f93gfIe8FXwut6-vDGNeS882aK2lekJXkSjFdSfOSrHjTKCY3Qr0mb1I6cC40r9WK_LkLvc8YHNKpp2kG9ziEHesh-5liwLg70SnQeY8UnJvGcepgHsrLQuMvjEjTHiEWaYQh0LK2md14Ct5Pp0S7HIsfxacMnrk9hIClFnbZF80xYkql_Ja86sEnfHc5r8j3Tx-_bT-z-4fbu-3NPXNKi5lJVXUVtI2WpivbuVZzozuupWw3UC5N17e1wKZWoLUQCqAUOmmMaXlbq-qKfDj7HuP0lDHNdhySQ-8h4JSTrYzmlTCygOwMujilFLG3xziMEE9WcLtkbUvWdsnaLlkXfn3m03EZF6M9TDmGMst_BZcGQ5rx9z93iI_W1FWtrbn9aqX8wb8o9dOKwl9fPgRjG4duh891-AtSLaF4</recordid><startdate>20091201</startdate><enddate>20091201</enddate><creator>An, Xianghai</creator><creator>Lin, Qingyun</creator><creator>Qu, Shen</creator><creator>Yang, Gang</creator><creator>Wu, Shiding</creator><creator>Zhang, Zhe-Feng</creator><general>Cambridge University Press</general><general>Springer International Publishing</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>H8G</scope><scope>JG9</scope></search><sort><creationdate>20091201</creationdate><title>Influence of stacking-fault energy on the accommodation of severe shear strain in Cu-Al alloys during equal-channel angular pressing</title><author>An, Xianghai ; Lin, Qingyun ; Qu, Shen ; Yang, Gang ; Wu, Shiding ; Zhang, Zhe-Feng</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c451t-243d3ab8526d526ccb5065d0522b9ab508dfb71e874a55114aa2b9d2666b0b743</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Alloy</topic><topic>Applied and Technical Physics</topic><topic>Biomaterials</topic><topic>Cold working</topic><topic>Inorganic Chemistry</topic><topic>Materials Engineering</topic><topic>Materials Science</topic><topic>Microstructure</topic><topic>Nanotechnology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>An, Xianghai</creatorcontrib><creatorcontrib>Lin, Qingyun</creatorcontrib><creatorcontrib>Qu, Shen</creatorcontrib><creatorcontrib>Yang, Gang</creatorcontrib><creatorcontrib>Wu, Shiding</creatorcontrib><creatorcontrib>Zhang, Zhe-Feng</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Copper Technical Reference Library</collection><collection>Materials Research Database</collection><jtitle>Journal of materials research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>An, Xianghai</au><au>Lin, Qingyun</au><au>Qu, Shen</au><au>Yang, Gang</au><au>Wu, Shiding</au><au>Zhang, Zhe-Feng</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Influence of stacking-fault energy on the accommodation of severe shear strain in Cu-Al alloys during equal-channel angular pressing</atitle><jtitle>Journal of materials research</jtitle><stitle>Journal of Materials Research</stitle><addtitle>J. Mater. Res</addtitle><date>2009-12-01</date><risdate>2009</risdate><volume>24</volume><issue>12</issue><spage>3636</spage><epage>3646</epage><pages>3636-3646</pages><issn>0884-2914</issn><eissn>2044-5326</eissn><abstract>X-ray diffraction (XRD) and transmission electron microscope (TEM) investigations have been carried out to decode the influence of stacking-fault energy (SFE) on the accommodation of large shear deformation in Cu-Al alloys subjected to one-pass equal-channel angular pressing. XRD results exhibit that the microstrain and density of dislocations initially increased with the reduction in the SFE, whereas they sharply decreased with a further decrease in SFE. By systematic TEM observations, we noticed that the accommodation mechanism of intense shear strain was gradually transformed from dislocation slip to deformation twin when SFE was lowered. Meanwhile, twin intersections and internal twins were also observed in the Cu-Al alloy with extremely low SFE. Due to the large external plastic deformation, microscale shear bands, as an inherent deformation mechanism, are increasingly significant to help carry the high local plasticity because low SFE facilitates the formation of shear bands.</abstract><cop>New York, USA</cop><pub>Cambridge University Press</pub><doi>10.1557/jmr.2009.0426</doi><tpages>11</tpages></addata></record> |
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| subjects | Alloy Applied and Technical Physics Biomaterials Cold working Inorganic Chemistry Materials Engineering Materials Science Microstructure Nanotechnology |
| title | Influence of stacking-fault energy on the accommodation of severe shear strain in Cu-Al alloys during equal-channel angular pressing |
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