The improved microstructures and properties of 7075 alloys produced by a water-cooling centrifugal casting method
A centrifugal water-cooling casting method was used to cast a 7075 alloy with the aim of refining the grain and inclusion size and improving mechanical properties in the wrought condition. Conventional ingot casting methods were also used and investigated for comparison with the centrifugal casting...
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| Veröffentlicht in: | Metallurgical Transactions, A A, 1996-07, Vol.27 (7), p.1933-1944 |
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| container_end_page | 1944 |
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| container_issue | 7 |
| container_start_page | 1933 |
| container_title | Metallurgical Transactions, A |
| container_volume | 27 |
| creator | YEH, J.-W JONG, S.-H LIU, W.-P |
| description | A centrifugal water-cooling casting method was used to cast a 7075 alloy with the aim of refining the grain and inclusion size and improving mechanical properties in the wrought condition. Conventional ingot casting methods were also used and investigated for comparison with the centrifugal casting method. The results show that by the centrifugal casting method, a small equiaxed grain size, 17 microns, is obtained in as-cast condition. Only 50 min are required for material homogenization. After rolling to obtain sheet, a grain size of 15 x 8 x 6 microns and an inclusion size of 2 to 3 microns are achieved. Fine-grained centrifugal-cast 7075 alloy exhibits higher strength than the ingot-cast one in the early stages of aging but poorer in the latter stages. However, its ductility and combination of strength and ductility is superior to the ingot-cast ones at all aging times. The reduction in strength in the latter aging stages for the fine-grained structure arises from its higher volume fraction of soft precipitate free zones. The improved ductility is attributed to the higher fraction of transgranular fracture, higher transgranular fracture strain, and intergranular fracture strain. (Author) |
| doi_str_mv | 10.1007/bf02651943 |
| format | Article |
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Conventional ingot casting methods were also used and investigated for comparison with the centrifugal casting method. The results show that by the centrifugal casting method, a small equiaxed grain size, 17 microns, is obtained in as-cast condition. Only 50 min are required for material homogenization. After rolling to obtain sheet, a grain size of 15 x 8 x 6 microns and an inclusion size of 2 to 3 microns are achieved. Fine-grained centrifugal-cast 7075 alloy exhibits higher strength than the ingot-cast one in the early stages of aging but poorer in the latter stages. However, its ductility and combination of strength and ductility is superior to the ingot-cast ones at all aging times. The reduction in strength in the latter aging stages for the fine-grained structure arises from its higher volume fraction of soft precipitate free zones. The improved ductility is attributed to the higher fraction of transgranular fracture, higher transgranular fracture strain, and intergranular fracture strain. (Author)</description><identifier>ISSN: 1073-5623</identifier><identifier>EISSN: 1543-1940</identifier><identifier>DOI: 10.1007/bf02651943</identifier><identifier>CODEN: MMTAEB</identifier><language>eng</language><publisher>New York, NY: Springer</publisher><subject>AGING ; ALUMINIUM BASE ALLOYS ; Applied sciences ; CASTING ; COOLING ; CRACK PROPAGATION ; Cross-disciplinary physics: materials science; rheology ; DUCTILITY ; Exact sciences and technology ; FRACTURES ; GRAIN BOUNDARIES ; GRAIN SIZE ; INCLUSIONS ; MATERIALS SCIENCE ; MECHANICAL PROPERTIES ; Metals. 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Conventional ingot casting methods were also used and investigated for comparison with the centrifugal casting method. The results show that by the centrifugal casting method, a small equiaxed grain size, 17 microns, is obtained in as-cast condition. Only 50 min are required for material homogenization. After rolling to obtain sheet, a grain size of 15 x 8 x 6 microns and an inclusion size of 2 to 3 microns are achieved. Fine-grained centrifugal-cast 7075 alloy exhibits higher strength than the ingot-cast one in the early stages of aging but poorer in the latter stages. However, its ductility and combination of strength and ductility is superior to the ingot-cast ones at all aging times. The reduction in strength in the latter aging stages for the fine-grained structure arises from its higher volume fraction of soft precipitate free zones. The improved ductility is attributed to the higher fraction of transgranular fracture, higher transgranular fracture strain, and intergranular fracture strain. (Author)</description><subject>AGING</subject><subject>ALUMINIUM BASE ALLOYS</subject><subject>Applied sciences</subject><subject>CASTING</subject><subject>COOLING</subject><subject>CRACK PROPAGATION</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>DUCTILITY</subject><subject>Exact sciences and technology</subject><subject>FRACTURES</subject><subject>GRAIN BOUNDARIES</subject><subject>GRAIN SIZE</subject><subject>INCLUSIONS</subject><subject>MATERIALS SCIENCE</subject><subject>MECHANICAL PROPERTIES</subject><subject>Metals. Metallurgy</subject><subject>MICROSTRUCTURE</subject><subject>Other heat and thermomechanical treatments</subject><subject>Physics</subject><subject>ROLLING</subject><subject>STRAINS</subject><subject>Treatment of materials and its effects on microstructure and properties</subject><issn>1073-5623</issn><issn>1543-1940</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1996</creationdate><recordtype>article</recordtype><recordid>eNo9kEtLxDAUhYso-Nz4CyKIC6F6kzSPLlUcFQQ3ui63aepE2mZMUmX-vRlGXd3Xdw7cUxSnFK4ogLpue2BS0LriO8UBFRUvcw-7uQfFSyEZ3y8OY_wAAFpzeVB8vi4tceMq-C_bkdGZ4GMKs0lzsJHg1JF8WtmQXB59TxQoQXAY_DpuLt1ssqxdEyTfmGwojfeDm96JsVMKrp_fcSAGY9rsRpuWvjsu9nocoj35rUfF2-L-9e6xfH55eLq7eS5NRVUqtakrJi2ve-i0ahmqFisGldEctbASGe-EpLoDIQFqLnQtdFsr1bfQKUB-VJxtffNDronGJWuWxk-TNalhmrGKZ-Ziy-RXPmcbUzO6aOww4GT9HBsmudQVExm83IKbfGKwfbMKbsSwbig0m-Sb28Vf8hk-_3XFaHDoA07GxX8Fp7LWlPIf_duCgA</recordid><startdate>19960701</startdate><enddate>19960701</enddate><creator>YEH, J.-W</creator><creator>JONG, S.-H</creator><creator>LIU, W.-P</creator><general>Springer</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>19960701</creationdate><title>The improved microstructures and properties of 7075 alloys produced by a water-cooling centrifugal casting method</title><author>YEH, J.-W ; JONG, S.-H ; LIU, W.-P</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c417t-8c9426e39f0d87b2a7ba4204c83a85e6a23d5618d056009358958b977fb0d70a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1996</creationdate><topic>AGING</topic><topic>ALUMINIUM BASE ALLOYS</topic><topic>Applied sciences</topic><topic>CASTING</topic><topic>COOLING</topic><topic>CRACK PROPAGATION</topic><topic>Cross-disciplinary physics: materials science; rheology</topic><topic>DUCTILITY</topic><topic>Exact sciences and technology</topic><topic>FRACTURES</topic><topic>GRAIN BOUNDARIES</topic><topic>GRAIN SIZE</topic><topic>INCLUSIONS</topic><topic>MATERIALS SCIENCE</topic><topic>MECHANICAL PROPERTIES</topic><topic>Metals. Metallurgy</topic><topic>MICROSTRUCTURE</topic><topic>Other heat and thermomechanical treatments</topic><topic>Physics</topic><topic>ROLLING</topic><topic>STRAINS</topic><topic>Treatment of materials and its effects on microstructure and properties</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>YEH, J.-W</creatorcontrib><creatorcontrib>JONG, S.-H</creatorcontrib><creatorcontrib>LIU, W.-P</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>Metallurgical Transactions, A</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>YEH, J.-W</au><au>JONG, S.-H</au><au>LIU, W.-P</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The improved microstructures and properties of 7075 alloys produced by a water-cooling centrifugal casting method</atitle><jtitle>Metallurgical Transactions, A</jtitle><date>1996-07-01</date><risdate>1996</risdate><volume>27</volume><issue>7</issue><spage>1933</spage><epage>1944</epage><pages>1933-1944</pages><issn>1073-5623</issn><eissn>1543-1940</eissn><coden>MMTAEB</coden><abstract>A centrifugal water-cooling casting method was used to cast a 7075 alloy with the aim of refining the grain and inclusion size and improving mechanical properties in the wrought condition. Conventional ingot casting methods were also used and investigated for comparison with the centrifugal casting method. The results show that by the centrifugal casting method, a small equiaxed grain size, 17 microns, is obtained in as-cast condition. Only 50 min are required for material homogenization. After rolling to obtain sheet, a grain size of 15 x 8 x 6 microns and an inclusion size of 2 to 3 microns are achieved. Fine-grained centrifugal-cast 7075 alloy exhibits higher strength than the ingot-cast one in the early stages of aging but poorer in the latter stages. However, its ductility and combination of strength and ductility is superior to the ingot-cast ones at all aging times. The reduction in strength in the latter aging stages for the fine-grained structure arises from its higher volume fraction of soft precipitate free zones. The improved ductility is attributed to the higher fraction of transgranular fracture, higher transgranular fracture strain, and intergranular fracture strain. (Author)</abstract><cop>New York, NY</cop><pub>Springer</pub><doi>10.1007/bf02651943</doi><tpages>12</tpages></addata></record> |
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| ispartof | Metallurgical Transactions, A, 1996-07, Vol.27 (7), p.1933-1944 |
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| language | eng |
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| source | Springer Nature - Complete Springer Journals |
| subjects | AGING ALUMINIUM BASE ALLOYS Applied sciences CASTING COOLING CRACK PROPAGATION Cross-disciplinary physics: materials science rheology DUCTILITY Exact sciences and technology FRACTURES GRAIN BOUNDARIES GRAIN SIZE INCLUSIONS MATERIALS SCIENCE MECHANICAL PROPERTIES Metals. Metallurgy MICROSTRUCTURE Other heat and thermomechanical treatments Physics ROLLING STRAINS Treatment of materials and its effects on microstructure and properties |
| title | The improved microstructures and properties of 7075 alloys produced by a water-cooling centrifugal casting method |
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