The microstructure and mechanical properties of extra low interstitials (ELI) Ti-6Al-4V alloys manufactured from hydride–dehydride (HDH) powder
•ELI Ti-6Al-4V alloys with 0.07 wt% O are produced by sintering HDH powder.•O content of powder exposed to the air is proportional to its specific surface area.•Fine near-equiaxed α of 20 µm is obtained by vacuum sintering and capsule-free HIP. Ti alloys produced from HDH powder have suffered from h...
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| Veröffentlicht in: | Journal of alloys and compounds 2021-08, Vol.873, p.159757, Article 159757 |
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| creator | Zhang, Ce Yang, Fang Chen, Cunguang Guo, Zhimeng |
| description | •ELI Ti-6Al-4V alloys with 0.07 wt% O are produced by sintering HDH powder.•O content of powder exposed to the air is proportional to its specific surface area.•Fine near-equiaxed α of 20 µm is obtained by vacuum sintering and capsule-free HIP.
Ti alloys produced from HDH powder have suffered from high O/N interstitials content. In the present study, a whole well-protected process from Ti sponge to as-sintered materials is adopted, and thus the lowest O/N contents of as-sintered materials are 0.07 wt% and 0.018 wt%, within the specification of Grade F-23 (Ti-6Al-4V ELI) according to ASTM B988-13. The passivation law of powder and its compact has also been studied in detail. Subsequently, sintering experiment indicates fine ELI powder has an excellent sinterability. A relative density over 96% can be obtained by sintering at 1100 °C. Capsule-free HIP post-sintering is performed to achieve full density and obtain fine and near-equiaxed α grain at the same time. The as-HIPped sample has better comprehensive mechanical properties, with strength exceeding 970 MPa and elongation exceeding 16.4%. |
| doi_str_mv | 10.1016/j.jallcom.2021.159757 |
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Ti alloys produced from HDH powder have suffered from high O/N interstitials content. In the present study, a whole well-protected process from Ti sponge to as-sintered materials is adopted, and thus the lowest O/N contents of as-sintered materials are 0.07 wt% and 0.018 wt%, within the specification of Grade F-23 (Ti-6Al-4V ELI) according to ASTM B988-13. The passivation law of powder and its compact has also been studied in detail. Subsequently, sintering experiment indicates fine ELI powder has an excellent sinterability. A relative density over 96% can be obtained by sintering at 1100 °C. Capsule-free HIP post-sintering is performed to achieve full density and obtain fine and near-equiaxed α grain at the same time. The as-HIPped sample has better comprehensive mechanical properties, with strength exceeding 970 MPa and elongation exceeding 16.4%.</description><identifier>ISSN: 0925-8388</identifier><identifier>EISSN: 1873-4669</identifier><identifier>DOI: 10.1016/j.jallcom.2021.159757</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Alloy powders ; Density ; Elongation ; Interstitials ; Mechanical properties ; Microstructure ; Oxygen ; Powder metallurgy ; Sinterability ; Sintering ; Sintering (powder metallurgy) ; Ti alloys ; Titanium base alloys</subject><ispartof>Journal of alloys and compounds, 2021-08, Vol.873, p.159757, Article 159757</ispartof><rights>2021 Elsevier B.V.</rights><rights>Copyright Elsevier BV Aug 25, 2021</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c337t-31b423644b5f83ab4f6a6e7f9cb3c48f028e3b9c1321044ae9575e66f7f14ab53</citedby><cites>FETCH-LOGICAL-c337t-31b423644b5f83ab4f6a6e7f9cb3c48f028e3b9c1321044ae9575e66f7f14ab53</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S092583882101166X$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,65309</link.rule.ids></links><search><creatorcontrib>Zhang, Ce</creatorcontrib><creatorcontrib>Yang, Fang</creatorcontrib><creatorcontrib>Chen, Cunguang</creatorcontrib><creatorcontrib>Guo, Zhimeng</creatorcontrib><title>The microstructure and mechanical properties of extra low interstitials (ELI) Ti-6Al-4V alloys manufactured from hydride–dehydride (HDH) powder</title><title>Journal of alloys and compounds</title><description>•ELI Ti-6Al-4V alloys with 0.07 wt% O are produced by sintering HDH powder.•O content of powder exposed to the air is proportional to its specific surface area.•Fine near-equiaxed α of 20 µm is obtained by vacuum sintering and capsule-free HIP.
Ti alloys produced from HDH powder have suffered from high O/N interstitials content. In the present study, a whole well-protected process from Ti sponge to as-sintered materials is adopted, and thus the lowest O/N contents of as-sintered materials are 0.07 wt% and 0.018 wt%, within the specification of Grade F-23 (Ti-6Al-4V ELI) according to ASTM B988-13. The passivation law of powder and its compact has also been studied in detail. Subsequently, sintering experiment indicates fine ELI powder has an excellent sinterability. A relative density over 96% can be obtained by sintering at 1100 °C. Capsule-free HIP post-sintering is performed to achieve full density and obtain fine and near-equiaxed α grain at the same time. The as-HIPped sample has better comprehensive mechanical properties, with strength exceeding 970 MPa and elongation exceeding 16.4%.</description><subject>Alloy powders</subject><subject>Density</subject><subject>Elongation</subject><subject>Interstitials</subject><subject>Mechanical properties</subject><subject>Microstructure</subject><subject>Oxygen</subject><subject>Powder metallurgy</subject><subject>Sinterability</subject><subject>Sintering</subject><subject>Sintering (powder metallurgy)</subject><subject>Ti alloys</subject><subject>Titanium base alloys</subject><issn>0925-8388</issn><issn>1873-4669</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNqFkM1O3DAUha2KSh1oH6GSJTawyNSOf5KsEALKII3EZtqt5TjXGkdJPNgOw-x4hapvyJOQYWbP6t7FOefe8yH0k5I5JVT-auet7jrj-3lOcjqnoipE8QXNaFmwjEtZnaAZqXKRlawsv6HTGFtCCK0YnaF_qzXg3pngYwqjSWMArIcG92DWenBGd3gT_AZCchCxtxheUtC481vshgQhJpec7iK-uFs-XOKVy-R1l_G_ePrI7yLu9TBa_ZHbYBt8j9e7JrgG3l7_N3Dc8cXidnGJN37bQPiOvtopEH4c5xn68_tudbPIlo_3DzfXy8wwVqSM0ZrnTHJeC1syXXMrtYTCVqZmhpeW5CWwujKU5ZRwrqEShQApbWEp17VgZ-j8kDv1exohJtX6MQzTSZULnnPBSyEnlTio9oRiAKs2wfU67BQlak9ftepIX-3pqwP9yXd18MFU4dlBUNE4GAw0LoBJqvHuk4R3DO2SpA</recordid><startdate>20210825</startdate><enddate>20210825</enddate><creator>Zhang, Ce</creator><creator>Yang, Fang</creator><creator>Chen, Cunguang</creator><creator>Guo, Zhimeng</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20210825</creationdate><title>The microstructure and mechanical properties of extra low interstitials (ELI) Ti-6Al-4V alloys manufactured from hydride–dehydride (HDH) powder</title><author>Zhang, Ce ; Yang, Fang ; Chen, Cunguang ; Guo, Zhimeng</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c337t-31b423644b5f83ab4f6a6e7f9cb3c48f028e3b9c1321044ae9575e66f7f14ab53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Alloy powders</topic><topic>Density</topic><topic>Elongation</topic><topic>Interstitials</topic><topic>Mechanical properties</topic><topic>Microstructure</topic><topic>Oxygen</topic><topic>Powder metallurgy</topic><topic>Sinterability</topic><topic>Sintering</topic><topic>Sintering (powder metallurgy)</topic><topic>Ti alloys</topic><topic>Titanium base alloys</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zhang, Ce</creatorcontrib><creatorcontrib>Yang, Fang</creatorcontrib><creatorcontrib>Chen, Cunguang</creatorcontrib><creatorcontrib>Guo, Zhimeng</creatorcontrib><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of alloys and compounds</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zhang, Ce</au><au>Yang, Fang</au><au>Chen, Cunguang</au><au>Guo, Zhimeng</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The microstructure and mechanical properties of extra low interstitials (ELI) Ti-6Al-4V alloys manufactured from hydride–dehydride (HDH) powder</atitle><jtitle>Journal of alloys and compounds</jtitle><date>2021-08-25</date><risdate>2021</risdate><volume>873</volume><spage>159757</spage><pages>159757-</pages><artnum>159757</artnum><issn>0925-8388</issn><eissn>1873-4669</eissn><abstract>•ELI Ti-6Al-4V alloys with 0.07 wt% O are produced by sintering HDH powder.•O content of powder exposed to the air is proportional to its specific surface area.•Fine near-equiaxed α of 20 µm is obtained by vacuum sintering and capsule-free HIP.
Ti alloys produced from HDH powder have suffered from high O/N interstitials content. In the present study, a whole well-protected process from Ti sponge to as-sintered materials is adopted, and thus the lowest O/N contents of as-sintered materials are 0.07 wt% and 0.018 wt%, within the specification of Grade F-23 (Ti-6Al-4V ELI) according to ASTM B988-13. The passivation law of powder and its compact has also been studied in detail. Subsequently, sintering experiment indicates fine ELI powder has an excellent sinterability. A relative density over 96% can be obtained by sintering at 1100 °C. Capsule-free HIP post-sintering is performed to achieve full density and obtain fine and near-equiaxed α grain at the same time. The as-HIPped sample has better comprehensive mechanical properties, with strength exceeding 970 MPa and elongation exceeding 16.4%.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jallcom.2021.159757</doi></addata></record> |
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| subjects | Alloy powders Density Elongation Interstitials Mechanical properties Microstructure Oxygen Powder metallurgy Sinterability Sintering Sintering (powder metallurgy) Ti alloys Titanium base alloys |
| title | The microstructure and mechanical properties of extra low interstitials (ELI) Ti-6Al-4V alloys manufactured from hydride–dehydride (HDH) powder |
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