Microstructural development of powder metallurgy cobalt-based superalloys processed by field assisted sintering techniques (FAST)
This study reports the microstructural evolution, physical and mechanical properties of cobalt-based superalloys processed from mechanical alloyed powders and consolidated by field-assisted sintering techniques (FAST). After an initial thermodynamic simulation of the ternary diagram by Thermocalc® t...
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| Veröffentlicht in: | Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2018-05, Vol.724, p.461-468 |
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| container_title | Materials science & engineering. A, Structural materials : properties, microstructure and processing |
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| creator | Casas, R. Gálvez, F. Campos, M. |
| description | This study reports the microstructural evolution, physical and mechanical properties of cobalt-based superalloys processed from mechanical alloyed powders and consolidated by field-assisted sintering techniques (FAST). After an initial thermodynamic simulation of the ternary diagram by Thermocalc® to determine the composition, a sequential milling process was carried out at room temperature up to 40 h milling of two different alloying systems: Co-12Al-10W (at%) and Co-12Al-10W-2Ti-2Ta (at%). Characterization of the powders was performed by using X-Ray diffraction, scanning electron microscope with energy-dispersive X-ray spectroscopy (EDS) and particle-size analyzer. Consolidated samples were also characterized in terms of density, microhardness and hardness. In order to promote the dual γ/γ’ microstructure, both alloys were aged after solution annealing heat treatment, improving a new route of consolidation with a new level of performance. |
| doi_str_mv | 10.1016/j.msea.2018.04.004 |
| format | Article |
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After an initial thermodynamic simulation of the ternary diagram by Thermocalc® to determine the composition, a sequential milling process was carried out at room temperature up to 40 h milling of two different alloying systems: Co-12Al-10W (at%) and Co-12Al-10W-2Ti-2Ta (at%). Characterization of the powders was performed by using X-Ray diffraction, scanning electron microscope with energy-dispersive X-ray spectroscopy (EDS) and particle-size analyzer. Consolidated samples were also characterized in terms of density, microhardness and hardness. In order to promote the dual γ/γ’ microstructure, both alloys were aged after solution annealing heat treatment, improving a new route of consolidation with a new level of performance.</description><identifier>ISSN: 0921-5093</identifier><identifier>EISSN: 1873-4936</identifier><identifier>DOI: 10.1016/j.msea.2018.04.004</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Alloy powders ; Alloy systems ; Cobalt ; Cobalt base alloys ; Cobalt-based superalloys ; Consolidation ; Densification ; Energy dispersive X ray spectroscopy ; Field-assisted sintering ; Heat treatment ; Mechanical properties ; Metallurgical analysis ; Microhardness ; Microstructure ; Powder metallurgy ; Sintering ; Sintering (powder metallurgy) ; Solution annealing ; Superalloys ; Systems (metallurgical) ; X-ray diffraction</subject><ispartof>Materials science & engineering. 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A, Structural materials : properties, microstructure and processing</title><description>This study reports the microstructural evolution, physical and mechanical properties of cobalt-based superalloys processed from mechanical alloyed powders and consolidated by field-assisted sintering techniques (FAST). After an initial thermodynamic simulation of the ternary diagram by Thermocalc® to determine the composition, a sequential milling process was carried out at room temperature up to 40 h milling of two different alloying systems: Co-12Al-10W (at%) and Co-12Al-10W-2Ti-2Ta (at%). Characterization of the powders was performed by using X-Ray diffraction, scanning electron microscope with energy-dispersive X-ray spectroscopy (EDS) and particle-size analyzer. Consolidated samples were also characterized in terms of density, microhardness and hardness. In order to promote the dual γ/γ’ microstructure, both alloys were aged after solution annealing heat treatment, improving a new route of consolidation with a new level of performance.</description><subject>Alloy powders</subject><subject>Alloy systems</subject><subject>Cobalt</subject><subject>Cobalt base alloys</subject><subject>Cobalt-based superalloys</subject><subject>Consolidation</subject><subject>Densification</subject><subject>Energy dispersive X ray spectroscopy</subject><subject>Field-assisted sintering</subject><subject>Heat treatment</subject><subject>Mechanical properties</subject><subject>Metallurgical analysis</subject><subject>Microhardness</subject><subject>Microstructure</subject><subject>Powder metallurgy</subject><subject>Sintering</subject><subject>Sintering (powder metallurgy)</subject><subject>Solution annealing</subject><subject>Superalloys</subject><subject>Systems (metallurgical)</subject><subject>X-ray diffraction</subject><issn>0921-5093</issn><issn>1873-4936</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp9kE2L1TAUhoMoeB39A64CbnTRevLRNgU3w-CoMOLCcR3S5GTMpbepSTpyl_5zU65ryeJAeJ_z8RDymkHLgPXvj-0po2k5MNWCbAHkE3JgahCNHEX_lBxg5KzpYBTPyYucjwDAJHQH8udrsCnmkjZbtmRm6vAR57iecCk0errG3w4TPWEx87ylhzO1cTJzaSaT0dG8rVipOZ4zXVO0mPff6Ux9wNlRk3PIZc-FpWAKywMtaH8u4deGmb69vf5-_-4leebNnPHVv3pFftx-vL_53Nx9-_Tl5vqusRLG0jjeT50fOuEnUI5LoUB13HjvmTUoZL1PTV509Q1-GlAqB9xUVI09V3wSV-TNpW_dcx9f9DFuaakjNYd-7AC6QdQUv6R2Kzmh12sKJ5POmoHeVeuj3lXrXbUGqavqCn24QFj3fwyYdLYBF4suJLRFuxj-h_8FotmJ8w</recordid><startdate>20180502</startdate><enddate>20180502</enddate><creator>Casas, R.</creator><creator>Gálvez, F.</creator><creator>Campos, M.</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20180502</creationdate><title>Microstructural development of powder metallurgy cobalt-based superalloys processed by field assisted sintering techniques (FAST)</title><author>Casas, R. ; Gálvez, F. ; Campos, M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c409t-d26b5f753fb08d24380852afff1cae349218bf353537fb7e48d02a409896282b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Alloy powders</topic><topic>Alloy systems</topic><topic>Cobalt</topic><topic>Cobalt base alloys</topic><topic>Cobalt-based superalloys</topic><topic>Consolidation</topic><topic>Densification</topic><topic>Energy dispersive X ray spectroscopy</topic><topic>Field-assisted sintering</topic><topic>Heat treatment</topic><topic>Mechanical properties</topic><topic>Metallurgical analysis</topic><topic>Microhardness</topic><topic>Microstructure</topic><topic>Powder metallurgy</topic><topic>Sintering</topic><topic>Sintering (powder metallurgy)</topic><topic>Solution annealing</topic><topic>Superalloys</topic><topic>Systems (metallurgical)</topic><topic>X-ray diffraction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Casas, R.</creatorcontrib><creatorcontrib>Gálvez, F.</creatorcontrib><creatorcontrib>Campos, M.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Materials science & engineering. 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After an initial thermodynamic simulation of the ternary diagram by Thermocalc® to determine the composition, a sequential milling process was carried out at room temperature up to 40 h milling of two different alloying systems: Co-12Al-10W (at%) and Co-12Al-10W-2Ti-2Ta (at%). Characterization of the powders was performed by using X-Ray diffraction, scanning electron microscope with energy-dispersive X-ray spectroscopy (EDS) and particle-size analyzer. Consolidated samples were also characterized in terms of density, microhardness and hardness. In order to promote the dual γ/γ’ microstructure, both alloys were aged after solution annealing heat treatment, improving a new route of consolidation with a new level of performance.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.msea.2018.04.004</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Alloy powders Alloy systems Cobalt Cobalt base alloys Cobalt-based superalloys Consolidation Densification Energy dispersive X ray spectroscopy Field-assisted sintering Heat treatment Mechanical properties Metallurgical analysis Microhardness Microstructure Powder metallurgy Sintering Sintering (powder metallurgy) Solution annealing Superalloys Systems (metallurgical) X-ray diffraction |
| title | Microstructural development of powder metallurgy cobalt-based superalloys processed by field assisted sintering techniques (FAST) |
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