Microstructure evolution of eutectic Nb-24Ti-15Si-4Cr-2Al-2Hf alloy processed by directional solidification
In this work, the near-eutectic Nb-24Ti-15Si-4Cr-2Al-2Hf（at%） alloy was directionally solidified at 1900 ℃ with withdrawal rates of 6, 18, 36, 50 mm·min^-1 and then heat-treated at 1450 ℃ for 12 h. The microstructure evolution was investigated. The results show that the microstructure of the directi...
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| Veröffentlicht in: | Rare metals 2017-06, Vol.36 (6), p.472-477 |
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| description | In this work, the near-eutectic Nb-24Ti-15Si-4Cr-2Al-2Hf（at%） alloy was directionally solidified at 1900 ℃ with withdrawal rates of 6, 18, 36, 50 mm·min^-1 and then heat-treated at 1450 ℃ for 12 h. The microstructure evolution was investigated. The results show that the microstructure of the directionally solidified（DS） alloy is composed of Nbss＋Nb5Si3 eutectics within the whole withdrawal rate range, while the variation of rates makes a great difference on the solidification routes,the morphology and size of Nb_（ss）＋Nb_5Si_3 eutectic cells.With the increase in withdrawal rates, the petaloid Nbss＋Nb5Si3 eutectic cells transform into granular morphology. After the heat treatment, a mesh structure Nbssis formed gradually which isolates the Nb5Si3, and the phase boundaries become smoother in order to reduce the interfacial energy. Moreover, two kinds of Nb5Si3 exist in the heat-treated（HT） samples identified by crystal form and element composition, which are supposed as α-Nb5Si3 and γ-Nb5Si3, respectively. This study exhibits significant merits in guiding the optimization of Nb-Si-based alloys＇ mechanical properties. |
| doi_str_mv | 10.1007/s12598-015-0649-4 |
| format | Article |
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The microstructure evolution was investigated. The results show that the microstructure of the directionally solidified（DS） alloy is composed of Nbss＋Nb5Si3 eutectics within the whole withdrawal rate range, while the variation of rates makes a great difference on the solidification routes,the morphology and size of Nb_（ss）＋Nb_5Si_3 eutectic cells.With the increase in withdrawal rates, the petaloid Nbss＋Nb5Si3 eutectic cells transform into granular morphology. After the heat treatment, a mesh structure Nbssis formed gradually which isolates the Nb5Si3, and the phase boundaries become smoother in order to reduce the interfacial energy. Moreover, two kinds of Nb5Si3 exist in the heat-treated（HT） samples identified by crystal form and element composition, which are supposed as α-Nb5Si3 and γ-Nb5Si3, respectively. This study exhibits significant merits in guiding the optimization of Nb-Si-based alloys＇ mechanical properties.</description><identifier>ISSN: 1001-0521</identifier><identifier>EISSN: 1867-7185</identifier><identifier>DOI: 10.1007/s12598-015-0649-4</identifier><language>eng</language><publisher>Beijing: Nonferrous Metals Society of China</publisher><subject>Biomaterials ; Chemistry and Materials Science ; Crystals ; Directional solidification ; Energy ; Eutectic composition ; Eutectic temperature ; Heat treatment ; hf处理 ; Interfacial energy ; Materials Engineering ; Materials Science ; Mechanical properties ; Metallic Materials ; Microstructure ; Morphology ; Nanoscale Science and Technology ; Niobium base alloys ; Optimization ; Phase boundaries ; Physical Chemistry ; 共晶合金 ; 定向凝固组织 ; 组织演变 ; 细胞转化 ; 网状结构 ; 过热处理 ; 颗粒形态</subject><ispartof>Rare metals, 2017-06, Vol.36 (6), p.472-477</ispartof><rights>The Nonferrous Metals Society of China and Springer-Verlag Berlin Heidelberg 2015</rights><rights>Rare Metals is a copyright of Springer, 2017.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c343t-d526223fefe073ff1e0b6a8b005a77f3b0efe1e6c55822e2a2219db82bd6ce503</citedby><cites>FETCH-LOGICAL-c343t-d526223fefe073ff1e0b6a8b005a77f3b0efe1e6c55822e2a2219db82bd6ce503</cites><orcidid>0000-0002-1773-927X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/85314X/85314X.jpg</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s12598-015-0649-4$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s12598-015-0649-4$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,778,782,27911,27912,41475,42544,51306</link.rule.ids></links><search><creatorcontrib>Li, Zhen</creatorcontrib><creatorcontrib>Yuan, Sai-Nan</creatorcontrib><creatorcontrib>Jia, Li-Na</creatorcontrib><creatorcontrib>Kong, Bin</creatorcontrib><creatorcontrib>Hong, Zhen</creatorcontrib><creatorcontrib>Zhang, Hu</creatorcontrib><title>Microstructure evolution of eutectic Nb-24Ti-15Si-4Cr-2Al-2Hf alloy processed by directional solidification</title><title>Rare metals</title><addtitle>Rare Met</addtitle><addtitle>Rare Metals</addtitle><description>In this work, the near-eutectic Nb-24Ti-15Si-4Cr-2Al-2Hf（at%） alloy was directionally solidified at 1900 ℃ with withdrawal rates of 6, 18, 36, 50 mm·min^-1 and then heat-treated at 1450 ℃ for 12 h. The microstructure evolution was investigated. The results show that the microstructure of the directionally solidified（DS） alloy is composed of Nbss＋Nb5Si3 eutectics within the whole withdrawal rate range, while the variation of rates makes a great difference on the solidification routes,the morphology and size of Nb_（ss）＋Nb_5Si_3 eutectic cells.With the increase in withdrawal rates, the petaloid Nbss＋Nb5Si3 eutectic cells transform into granular morphology. After the heat treatment, a mesh structure Nbssis formed gradually which isolates the Nb5Si3, and the phase boundaries become smoother in order to reduce the interfacial energy. Moreover, two kinds of Nb5Si3 exist in the heat-treated（HT） samples identified by crystal form and element composition, which are supposed as α-Nb5Si3 and γ-Nb5Si3, respectively. This study exhibits significant merits in guiding the optimization of Nb-Si-based alloys＇ mechanical properties.</description><subject>Biomaterials</subject><subject>Chemistry and Materials Science</subject><subject>Crystals</subject><subject>Directional solidification</subject><subject>Energy</subject><subject>Eutectic composition</subject><subject>Eutectic temperature</subject><subject>Heat treatment</subject><subject>hf处理</subject><subject>Interfacial energy</subject><subject>Materials Engineering</subject><subject>Materials Science</subject><subject>Mechanical properties</subject><subject>Metallic Materials</subject><subject>Microstructure</subject><subject>Morphology</subject><subject>Nanoscale Science and Technology</subject><subject>Niobium base alloys</subject><subject>Optimization</subject><subject>Phase boundaries</subject><subject>Physical Chemistry</subject><subject>共晶合金</subject><subject>定向凝固组织</subject><subject>组织演变</subject><subject>细胞转化</subject><subject>网状结构</subject><subject>过热处理</subject><subject>颗粒形态</subject><issn>1001-0521</issn><issn>1867-7185</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNp9kMlOwzAQhiMEEusDcLPgbBiPt_RYVWwSy4FythLHLoZQt3aC1LcnUSvEidOMZv5vlr8ozhlcMQB9nRnKSUmBSQpKTKjYK45YqTTVrJT7Qw7AKEhkh8Vxzh8AQigFR8XnU7Ap5i71tuuTI-47tn0X4pJET1zfOdsFS55rimIeKJOvgYpZojhtKd57UrVt3JBVitbl7BpSb0gT0gjFZdWSHNvQBB9sNRZOiwNftdmd7eJJ8XZ7M5_d08eXu4fZ9JFaLnhHG4kKkXvnHWjuPXNQq6qsAWSltec1DB3mlJWyRHRYIbJJU5dYN8o6CfykuNzOHe5a9y535iP2abgnGzYBxWWpUQwqtlWN_-fkvFml8FWljWFgRk_N1lMzeGpGT83I4JbJg3a5cOnP5H-gi92i97hcrAfud5PSHFEpLfgP8fKFEg</recordid><startdate>20170601</startdate><enddate>20170601</enddate><creator>Li, Zhen</creator><creator>Yuan, Sai-Nan</creator><creator>Jia, Li-Na</creator><creator>Kong, Bin</creator><creator>Hong, Zhen</creator><creator>Zhang, Hu</creator><general>Nonferrous Metals Society of China</general><general>Springer Nature B.V</general><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>W92</scope><scope>~WA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</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>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><orcidid>https://orcid.org/0000-0002-1773-927X</orcidid></search><sort><creationdate>20170601</creationdate><title>Microstructure evolution of eutectic Nb-24Ti-15Si-4Cr-2Al-2Hf alloy processed by directional solidification</title><author>Li, Zhen ; Yuan, Sai-Nan ; Jia, Li-Na ; Kong, Bin ; Hong, Zhen ; Zhang, Hu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c343t-d526223fefe073ff1e0b6a8b005a77f3b0efe1e6c55822e2a2219db82bd6ce503</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Biomaterials</topic><topic>Chemistry and Materials Science</topic><topic>Crystals</topic><topic>Directional solidification</topic><topic>Energy</topic><topic>Eutectic composition</topic><topic>Eutectic temperature</topic><topic>Heat treatment</topic><topic>hf处理</topic><topic>Interfacial energy</topic><topic>Materials Engineering</topic><topic>Materials Science</topic><topic>Mechanical properties</topic><topic>Metallic Materials</topic><topic>Microstructure</topic><topic>Morphology</topic><topic>Nanoscale Science and Technology</topic><topic>Niobium base alloys</topic><topic>Optimization</topic><topic>Phase boundaries</topic><topic>Physical Chemistry</topic><topic>共晶合金</topic><topic>定向凝固组织</topic><topic>组织演变</topic><topic>细胞转化</topic><topic>网状结构</topic><topic>过热处理</topic><topic>颗粒形态</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Li, Zhen</creatorcontrib><creatorcontrib>Yuan, Sai-Nan</creatorcontrib><creatorcontrib>Jia, Li-Na</creatorcontrib><creatorcontrib>Kong, Bin</creatorcontrib><creatorcontrib>Hong, Zhen</creatorcontrib><creatorcontrib>Zhang, Hu</creatorcontrib><collection>中文科技期刊数据库</collection><collection>中文科技期刊数据库-CALIS站点</collection><collection>中文科技期刊数据库-7.0平台</collection><collection>中文科技期刊数据库-工程技术</collection><collection>中文科技期刊数据库- 镜像站点</collection><collection>CrossRef</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 UK/Ireland</collection><collection>ProQuest Central</collection><collection>Technology Collection (ProQuest)</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>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>Rare metals</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Li, Zhen</au><au>Yuan, Sai-Nan</au><au>Jia, Li-Na</au><au>Kong, Bin</au><au>Hong, Zhen</au><au>Zhang, Hu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Microstructure evolution of eutectic Nb-24Ti-15Si-4Cr-2Al-2Hf alloy processed by directional solidification</atitle><jtitle>Rare metals</jtitle><stitle>Rare Met</stitle><addtitle>Rare Metals</addtitle><date>2017-06-01</date><risdate>2017</risdate><volume>36</volume><issue>6</issue><spage>472</spage><epage>477</epage><pages>472-477</pages><issn>1001-0521</issn><eissn>1867-7185</eissn><abstract>In this work, the near-eutectic Nb-24Ti-15Si-4Cr-2Al-2Hf（at%） alloy was directionally solidified at 1900 ℃ with withdrawal rates of 6, 18, 36, 50 mm·min^-1 and then heat-treated at 1450 ℃ for 12 h. The microstructure evolution was investigated. The results show that the microstructure of the directionally solidified（DS） alloy is composed of Nbss＋Nb5Si3 eutectics within the whole withdrawal rate range, while the variation of rates makes a great difference on the solidification routes,the morphology and size of Nb_（ss）＋Nb_5Si_3 eutectic cells.With the increase in withdrawal rates, the petaloid Nbss＋Nb5Si3 eutectic cells transform into granular morphology. After the heat treatment, a mesh structure Nbssis formed gradually which isolates the Nb5Si3, and the phase boundaries become smoother in order to reduce the interfacial energy. Moreover, two kinds of Nb5Si3 exist in the heat-treated（HT） samples identified by crystal form and element composition, which are supposed as α-Nb5Si3 and γ-Nb5Si3, respectively. This study exhibits significant merits in guiding the optimization of Nb-Si-based alloys＇ mechanical properties.</abstract><cop>Beijing</cop><pub>Nonferrous Metals Society of China</pub><doi>10.1007/s12598-015-0649-4</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0002-1773-927X</orcidid></addata></record> |
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| subjects | Biomaterials Chemistry and Materials Science Crystals Directional solidification Energy Eutectic composition Eutectic temperature Heat treatment hf处理 Interfacial energy Materials Engineering Materials Science Mechanical properties Metallic Materials Microstructure Morphology Nanoscale Science and Technology Niobium base alloys Optimization Phase boundaries Physical Chemistry 共晶合金 定向凝固组织 组织演变 细胞转化 网状结构 过热处理 颗粒形态 |
| title | Microstructure evolution of eutectic Nb-24Ti-15Si-4Cr-2Al-2Hf alloy processed by directional solidification |
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