Precipitate crystallography and morphology in undercooled, rapidly solidified titanium rare earth alloys
Previous investigations of rapidly solidified titanium-rare earth alloys show supersaturated martensitic alpha ' Ti microstructures that are essentially devoid of precipitates in the as-quenched condition. In contrast, as-quenched Ti-Ce, Ti-Er and Ti-La alloys with large bulk liquid undercoolin...
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| Veröffentlicht in: | Scripta Materialia 1997-01, Vol.36 (2), p.157-163 |
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| creator | Kral, M.V. Hofmeister, W.H. Wittig, J.E. |
| description | Previous investigations of rapidly solidified titanium-rare earth alloys show supersaturated martensitic alpha ' Ti microstructures that are essentially devoid of precipitates in the as-quenched condition. In contrast, as-quenched Ti-Ce, Ti-Er and Ti-La alloys with large bulk liquid undercoolings just prior to rapid solidification contain dispersions of 3-20 nm diameter elemental rare earth particles within equiaxed alpha Ti grains. Electron diffraction experiments indicate that the precipitates are semi-coherent metallic rare earths. In the Ti-Ce and Ti-Er alloys, particles are arranged in planar and curved sheets. These are the first observations of this precipitate morphology in a Ti-Er alloy. Annealed materials contain both semi-coherent elemental rare earth particles and semi-coherent rare earth oxide particles with structures and orientation relationships that are unique to this undercooling/rapid solidification study. |
| doi_str_mv | 10.1016/S1359-6462(96)00364-8 |
| format | Article |
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In contrast, as-quenched Ti-Ce, Ti-Er and Ti-La alloys with large bulk liquid undercoolings just prior to rapid solidification contain dispersions of 3-20 nm diameter elemental rare earth particles within equiaxed alpha Ti grains. Electron diffraction experiments indicate that the precipitates are semi-coherent metallic rare earths. In the Ti-Ce and Ti-Er alloys, particles are arranged in planar and curved sheets. These are the first observations of this precipitate morphology in a Ti-Er alloy. 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Metallurgy ; MICROSTRUCTURE ; MORPHOLOGY ; OXIDATION ; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations ; Physics ; PRECIPITATION ; QUENCHING ; Solid-phase precipitation ; SOLIDIFICATION ; TITANIUM BASE ALLOYS</subject><ispartof>Scripta Materialia, 1997-01, Vol.36 (2), p.157-163</ispartof><rights>1996</rights><rights>1997 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c393t-f1ebb43e0c7e4e77841c5da99a491366322925504a0c4e7f7cffa6b4c85ce5bd3</citedby><cites>FETCH-LOGICAL-c393t-f1ebb43e0c7e4e77841c5da99a491366322925504a0c4e7f7cffa6b4c85ce5bd3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/S1359-6462(96)00364-8$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,885,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2581344$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/417898$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Kral, M.V.</creatorcontrib><creatorcontrib>Hofmeister, W.H.</creatorcontrib><creatorcontrib>Wittig, J.E.</creatorcontrib><title>Precipitate crystallography and morphology in undercooled, rapidly solidified titanium rare earth alloys</title><title>Scripta Materialia</title><description>Previous investigations of rapidly solidified titanium-rare earth alloys show supersaturated martensitic alpha ' Ti microstructures that are essentially devoid of precipitates in the as-quenched condition. In contrast, as-quenched Ti-Ce, Ti-Er and Ti-La alloys with large bulk liquid undercoolings just prior to rapid solidification contain dispersions of 3-20 nm diameter elemental rare earth particles within equiaxed alpha Ti grains. Electron diffraction experiments indicate that the precipitates are semi-coherent metallic rare earths. In the Ti-Ce and Ti-Er alloys, particles are arranged in planar and curved sheets. These are the first observations of this precipitate morphology in a Ti-Er alloy. Annealed materials contain both semi-coherent elemental rare earth particles and semi-coherent rare earth oxide particles with structures and orientation relationships that are unique to this undercooling/rapid solidification study.</description><subject>ANNEALING</subject><subject>Applied sciences</subject><subject>CERIUM ALLOYS</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>CRYSTAL STRUCTURE</subject><subject>ERBIUM ALLOYS</subject><subject>Exact sciences and technology</subject><subject>GRAIN ORIENTATION</subject><subject>LANTHANUM ALLOYS</subject><subject>LEVITATION</subject><subject>LIQUID METALS</subject><subject>MATERIALS SCIENCE</subject><subject>Metals. Metallurgy</subject><subject>MICROSTRUCTURE</subject><subject>MORPHOLOGY</subject><subject>OXIDATION</subject><subject>Phase diagrams and microstructures developed by solidification and solid-solid phase transformations</subject><subject>Physics</subject><subject>PRECIPITATION</subject><subject>QUENCHING</subject><subject>Solid-phase precipitation</subject><subject>SOLIDIFICATION</subject><subject>TITANIUM BASE ALLOYS</subject><issn>1359-6462</issn><issn>1872-8456</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1997</creationdate><recordtype>article</recordtype><recordid>eNqFkFFrFTEQhYMoWK_-BCGCSAW3JptsdvMkUmwVCgrqc8idzLqR3M2a5Bb23zfbW331KUPmm3MOh5CXnF1wxtX771x0ulFStedavWVMKNkMj8gZH_q2GWSnHtf5L_KUPMv5N2NM8ZafkelbQvCLL7YghbTmYkOIv5JdppXa2dFDTMsU69dK_UyPs8MEMQZ072iFvAsrzTF450ePjpYqNPvjoe4SUrSpTHQTXPNz8mS0IeOLh3dHfl59-nH5ubn5ev3l8uNNA0KL0owc93spkEGPEvt-kBw6Z7W2UnOhlGhb3XYdk5ZB3Y89jKNVewlDB9jtndiRVyfdmIs3GXxBmCDOM0IxkveDHirz5sQsKf45Yi7m4DNgCHbGeMym7VstZc2zI90JhBRzTjiaJfmDTavhzGzdm_vuzVas0crcd282g9cPBjaDDWOyM_j877jtBi6qwY58OGFYC7n1mLa8OAM6n7a4Lvr_GN0Buy-axw</recordid><startdate>19970115</startdate><enddate>19970115</enddate><creator>Kral, M.V.</creator><creator>Hofmeister, W.H.</creator><creator>Wittig, J.E.</creator><general>Elsevier Ltd</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>H8D</scope><scope>JG9</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>19970115</creationdate><title>Precipitate crystallography and morphology in undercooled, rapidly solidified titanium rare earth alloys</title><author>Kral, M.V. ; Hofmeister, W.H. ; Wittig, J.E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c393t-f1ebb43e0c7e4e77841c5da99a491366322925504a0c4e7f7cffa6b4c85ce5bd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1997</creationdate><topic>ANNEALING</topic><topic>Applied sciences</topic><topic>CERIUM ALLOYS</topic><topic>Cross-disciplinary physics: materials science; rheology</topic><topic>CRYSTAL STRUCTURE</topic><topic>ERBIUM ALLOYS</topic><topic>Exact sciences and technology</topic><topic>GRAIN ORIENTATION</topic><topic>LANTHANUM ALLOYS</topic><topic>LEVITATION</topic><topic>LIQUID METALS</topic><topic>MATERIALS SCIENCE</topic><topic>Metals. Metallurgy</topic><topic>MICROSTRUCTURE</topic><topic>MORPHOLOGY</topic><topic>OXIDATION</topic><topic>Phase diagrams and microstructures developed by solidification and solid-solid phase transformations</topic><topic>Physics</topic><topic>PRECIPITATION</topic><topic>QUENCHING</topic><topic>Solid-phase precipitation</topic><topic>SOLIDIFICATION</topic><topic>TITANIUM BASE ALLOYS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kral, M.V.</creatorcontrib><creatorcontrib>Hofmeister, W.H.</creatorcontrib><creatorcontrib>Wittig, J.E.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>Scripta Materialia</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kral, M.V.</au><au>Hofmeister, W.H.</au><au>Wittig, J.E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Precipitate crystallography and morphology in undercooled, rapidly solidified titanium rare earth alloys</atitle><jtitle>Scripta Materialia</jtitle><date>1997-01-15</date><risdate>1997</risdate><volume>36</volume><issue>2</issue><spage>157</spage><epage>163</epage><pages>157-163</pages><issn>1359-6462</issn><eissn>1872-8456</eissn><abstract>Previous investigations of rapidly solidified titanium-rare earth alloys show supersaturated martensitic alpha ' Ti microstructures that are essentially devoid of precipitates in the as-quenched condition. In contrast, as-quenched Ti-Ce, Ti-Er and Ti-La alloys with large bulk liquid undercoolings just prior to rapid solidification contain dispersions of 3-20 nm diameter elemental rare earth particles within equiaxed alpha Ti grains. Electron diffraction experiments indicate that the precipitates are semi-coherent metallic rare earths. In the Ti-Ce and Ti-Er alloys, particles are arranged in planar and curved sheets. These are the first observations of this precipitate morphology in a Ti-Er alloy. Annealed materials contain both semi-coherent elemental rare earth particles and semi-coherent rare earth oxide particles with structures and orientation relationships that are unique to this undercooling/rapid solidification study.</abstract><cop>New York, NY</cop><pub>Elsevier Ltd</pub><doi>10.1016/S1359-6462(96)00364-8</doi><tpages>7</tpages></addata></record> |
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| subjects | ANNEALING Applied sciences CERIUM ALLOYS Cross-disciplinary physics: materials science rheology CRYSTAL STRUCTURE ERBIUM ALLOYS Exact sciences and technology GRAIN ORIENTATION LANTHANUM ALLOYS LEVITATION LIQUID METALS MATERIALS SCIENCE Metals. Metallurgy MICROSTRUCTURE MORPHOLOGY OXIDATION Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Physics PRECIPITATION QUENCHING Solid-phase precipitation SOLIDIFICATION TITANIUM BASE ALLOYS |
| title | Precipitate crystallography and morphology in undercooled, rapidly solidified titanium rare earth alloys |
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