Rheological Solidification Behavior and Mechanical Properties of AZ91-Sn Alloys
The solidification and tensile deformation behaviors of rheo-cast AZ91-Sn alloys were revealed to study the effects of Sn alloying on improvement of AZ91 alloy’s mechanical properties. Two kinds of Mg17Al12 phases precipitated from the supersaturated magnesium matrix during rheo-solidification were...
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| Veröffentlicht in: | Crystals (Basel) 2019-12, Vol.9 (12), p.641 |
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| creator | Tie, Di Zhang, Boyu Yan, Lufei Guan, Renguo Ji, Zhaoshan Liu, Haifeng Zhang, Deliang Liu, Debao Chen, Minfang |
| description | The solidification and tensile deformation behaviors of rheo-cast AZ91-Sn alloys were revealed to study the effects of Sn alloying on improvement of AZ91 alloy’s mechanical properties. Two kinds of Mg17Al12 phases precipitated from the supersaturated magnesium matrix during rheo-solidification were observed: coarse discontinuous precipitates (DP) at grain boundaries and small-sized continuous precipitates (CP) inside grains. With increasing Sn content, the amount of Mg17Al12 phases was increased whilst the amount of Al atoms in the matrix was decreased. Due to the higher melting point of Mg2Sn than Mg17Al12, Mg2Sn precipitated earlier from the melt, and therefore provided heterogeneous nuclei for Mg17Al12 during the eutectic reaction. Due to grain refinement and solid solution strengthening, AZ91-2.4Sn (mass%) gained 52% increase in tensile strength and 93% increase in elongation compared with pure AZ91 alloy. The higher-density twins and microcracks induced by Sn alloying relaxed stress concentration during plastic deformation, so the fracture mode was transformed from cleavage fracture of pure AZ91 alloy to ductile fracture of AZ91-Sn alloys. |
| doi_str_mv | 10.3390/cryst9120641 |
| format | Article |
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Two kinds of Mg17Al12 phases precipitated from the supersaturated magnesium matrix during rheo-solidification were observed: coarse discontinuous precipitates (DP) at grain boundaries and small-sized continuous precipitates (CP) inside grains. With increasing Sn content, the amount of Mg17Al12 phases was increased whilst the amount of Al atoms in the matrix was decreased. Due to the higher melting point of Mg2Sn than Mg17Al12, Mg2Sn precipitated earlier from the melt, and therefore provided heterogeneous nuclei for Mg17Al12 during the eutectic reaction. Due to grain refinement and solid solution strengthening, AZ91-2.4Sn (mass%) gained 52% increase in tensile strength and 93% increase in elongation compared with pure AZ91 alloy. The higher-density twins and microcracks induced by Sn alloying relaxed stress concentration during plastic deformation, so the fracture mode was transformed from cleavage fracture of pure AZ91 alloy to ductile fracture of AZ91-Sn alloys.</description><identifier>ISSN: 2073-4352</identifier><identifier>EISSN: 2073-4352</identifier><identifier>DOI: 10.3390/cryst9120641</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Alloying effects ; Cellular precipitates ; Chemical precipitation ; Ductile fracture ; Ductility ; Elongation ; Environmental impact ; Eutectic reactions ; Grain boundaries ; Grain refinement ; Intermetallic compounds ; Magnesium alloys ; Magnesium base alloys ; Magnesium compounds ; Mechanical properties ; Melting points ; Microcracks ; Plastic deformation ; Precipitates ; Rheological properties ; Rheology ; Scanning electron microscopy ; Solid solutions ; Solidification ; Solids ; Solution strengthening ; Stannides ; Stress concentration ; Tensile deformation ; Tensile strength ; Tin ; Tin base alloys ; Transmission electron microscopy</subject><ispartof>Crystals (Basel), 2019-12, Vol.9 (12), p.641</ispartof><rights>2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c301t-f9a1d921e3f3cfc699051c11627df1084837ae2606b516a656ae01ef0ef8648b3</citedby><cites>FETCH-LOGICAL-c301t-f9a1d921e3f3cfc699051c11627df1084837ae2606b516a656ae01ef0ef8648b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,864,27924,27925</link.rule.ids></links><search><creatorcontrib>Tie, Di</creatorcontrib><creatorcontrib>Zhang, Boyu</creatorcontrib><creatorcontrib>Yan, Lufei</creatorcontrib><creatorcontrib>Guan, Renguo</creatorcontrib><creatorcontrib>Ji, Zhaoshan</creatorcontrib><creatorcontrib>Liu, Haifeng</creatorcontrib><creatorcontrib>Zhang, Deliang</creatorcontrib><creatorcontrib>Liu, Debao</creatorcontrib><creatorcontrib>Chen, Minfang</creatorcontrib><title>Rheological Solidification Behavior and Mechanical Properties of AZ91-Sn Alloys</title><title>Crystals (Basel)</title><description>The solidification and tensile deformation behaviors of rheo-cast AZ91-Sn alloys were revealed to study the effects of Sn alloying on improvement of AZ91 alloy’s mechanical properties. Two kinds of Mg17Al12 phases precipitated from the supersaturated magnesium matrix during rheo-solidification were observed: coarse discontinuous precipitates (DP) at grain boundaries and small-sized continuous precipitates (CP) inside grains. With increasing Sn content, the amount of Mg17Al12 phases was increased whilst the amount of Al atoms in the matrix was decreased. Due to the higher melting point of Mg2Sn than Mg17Al12, Mg2Sn precipitated earlier from the melt, and therefore provided heterogeneous nuclei for Mg17Al12 during the eutectic reaction. Due to grain refinement and solid solution strengthening, AZ91-2.4Sn (mass%) gained 52% increase in tensile strength and 93% increase in elongation compared with pure AZ91 alloy. The higher-density twins and microcracks induced by Sn alloying relaxed stress concentration during plastic deformation, so the fracture mode was transformed from cleavage fracture of pure AZ91 alloy to ductile fracture of AZ91-Sn alloys.</description><subject>Alloying effects</subject><subject>Cellular precipitates</subject><subject>Chemical precipitation</subject><subject>Ductile fracture</subject><subject>Ductility</subject><subject>Elongation</subject><subject>Environmental impact</subject><subject>Eutectic reactions</subject><subject>Grain boundaries</subject><subject>Grain refinement</subject><subject>Intermetallic compounds</subject><subject>Magnesium alloys</subject><subject>Magnesium base alloys</subject><subject>Magnesium compounds</subject><subject>Mechanical properties</subject><subject>Melting points</subject><subject>Microcracks</subject><subject>Plastic deformation</subject><subject>Precipitates</subject><subject>Rheological properties</subject><subject>Rheology</subject><subject>Scanning electron microscopy</subject><subject>Solid solutions</subject><subject>Solidification</subject><subject>Solids</subject><subject>Solution strengthening</subject><subject>Stannides</subject><subject>Stress concentration</subject><subject>Tensile deformation</subject><subject>Tensile strength</subject><subject>Tin</subject><subject>Tin base alloys</subject><subject>Transmission electron microscopy</subject><issn>2073-4352</issn><issn>2073-4352</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpNkM1OwzAQhC0EElXpjQewxJXArp048bFU_ElFRRQuXCLXsYmrEAc7RcrbEyiHzmXn8GlHM4ScI1xxLuFahyH2EhmIFI_IhEHOk5Rn7PjAn5JZjFsYlQvIc5yQ1UttfOM_nFYNXfvGVc6Ovne-pTemVt_OB6raij4ZXav2D3sOvjOhdyZSb-n8XWKybum8afwQz8iJVU00s_87JW93t6-Lh2S5un9czJeJ5oB9YqXCSjI03HJttZASMtSIguWVRSjSgufKMAFik6FQIhPKABoLxhYiLTZ8Si72f7vgv3Ym9uXW70I7RpYsG5umY0Ucqcs9pYOPMRhbdsF9qjCUCOXvauXhavwHxmxfCQ</recordid><startdate>20191201</startdate><enddate>20191201</enddate><creator>Tie, Di</creator><creator>Zhang, Boyu</creator><creator>Yan, Lufei</creator><creator>Guan, Renguo</creator><creator>Ji, Zhaoshan</creator><creator>Liu, Haifeng</creator><creator>Zhang, Deliang</creator><creator>Liu, Debao</creator><creator>Chen, Minfang</creator><general>MDPI AG</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope></search><sort><creationdate>20191201</creationdate><title>Rheological Solidification Behavior and Mechanical Properties of AZ91-Sn Alloys</title><author>Tie, Di ; Zhang, Boyu ; Yan, Lufei ; Guan, Renguo ; Ji, Zhaoshan ; Liu, Haifeng ; Zhang, Deliang ; Liu, Debao ; Chen, Minfang</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c301t-f9a1d921e3f3cfc699051c11627df1084837ae2606b516a656ae01ef0ef8648b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Alloying effects</topic><topic>Cellular precipitates</topic><topic>Chemical precipitation</topic><topic>Ductile fracture</topic><topic>Ductility</topic><topic>Elongation</topic><topic>Environmental impact</topic><topic>Eutectic reactions</topic><topic>Grain boundaries</topic><topic>Grain refinement</topic><topic>Intermetallic compounds</topic><topic>Magnesium alloys</topic><topic>Magnesium base alloys</topic><topic>Magnesium compounds</topic><topic>Mechanical properties</topic><topic>Melting points</topic><topic>Microcracks</topic><topic>Plastic deformation</topic><topic>Precipitates</topic><topic>Rheological properties</topic><topic>Rheology</topic><topic>Scanning electron microscopy</topic><topic>Solid solutions</topic><topic>Solidification</topic><topic>Solids</topic><topic>Solution strengthening</topic><topic>Stannides</topic><topic>Stress concentration</topic><topic>Tensile deformation</topic><topic>Tensile strength</topic><topic>Tin</topic><topic>Tin base alloys</topic><topic>Transmission electron microscopy</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Tie, Di</creatorcontrib><creatorcontrib>Zhang, Boyu</creatorcontrib><creatorcontrib>Yan, Lufei</creatorcontrib><creatorcontrib>Guan, Renguo</creatorcontrib><creatorcontrib>Ji, Zhaoshan</creatorcontrib><creatorcontrib>Liu, Haifeng</creatorcontrib><creatorcontrib>Zhang, Deliang</creatorcontrib><creatorcontrib>Liu, Debao</creatorcontrib><creatorcontrib>Chen, Minfang</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>Materials Science Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><jtitle>Crystals (Basel)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Tie, Di</au><au>Zhang, Boyu</au><au>Yan, Lufei</au><au>Guan, Renguo</au><au>Ji, Zhaoshan</au><au>Liu, Haifeng</au><au>Zhang, Deliang</au><au>Liu, Debao</au><au>Chen, Minfang</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Rheological Solidification Behavior and Mechanical Properties of AZ91-Sn Alloys</atitle><jtitle>Crystals (Basel)</jtitle><date>2019-12-01</date><risdate>2019</risdate><volume>9</volume><issue>12</issue><spage>641</spage><pages>641-</pages><issn>2073-4352</issn><eissn>2073-4352</eissn><abstract>The solidification and tensile deformation behaviors of rheo-cast AZ91-Sn alloys were revealed to study the effects of Sn alloying on improvement of AZ91 alloy’s mechanical properties. Two kinds of Mg17Al12 phases precipitated from the supersaturated magnesium matrix during rheo-solidification were observed: coarse discontinuous precipitates (DP) at grain boundaries and small-sized continuous precipitates (CP) inside grains. With increasing Sn content, the amount of Mg17Al12 phases was increased whilst the amount of Al atoms in the matrix was decreased. Due to the higher melting point of Mg2Sn than Mg17Al12, Mg2Sn precipitated earlier from the melt, and therefore provided heterogeneous nuclei for Mg17Al12 during the eutectic reaction. Due to grain refinement and solid solution strengthening, AZ91-2.4Sn (mass%) gained 52% increase in tensile strength and 93% increase in elongation compared with pure AZ91 alloy. The higher-density twins and microcracks induced by Sn alloying relaxed stress concentration during plastic deformation, so the fracture mode was transformed from cleavage fracture of pure AZ91 alloy to ductile fracture of AZ91-Sn alloys.</abstract><cop>Basel</cop><pub>MDPI AG</pub><doi>10.3390/cryst9120641</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Alloying effects Cellular precipitates Chemical precipitation Ductile fracture Ductility Elongation Environmental impact Eutectic reactions Grain boundaries Grain refinement Intermetallic compounds Magnesium alloys Magnesium base alloys Magnesium compounds Mechanical properties Melting points Microcracks Plastic deformation Precipitates Rheological properties Rheology Scanning electron microscopy Solid solutions Solidification Solids Solution strengthening Stannides Stress concentration Tensile deformation Tensile strength Tin Tin base alloys Transmission electron microscopy |
| title | Rheological Solidification Behavior and Mechanical Properties of AZ91-Sn Alloys |
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