Creep Behavior of Ti-6Al-4Nb-4Zr Fabricated by Powder Bed Fusion Using a Laser Beam
Powder bed fusion using a laser beam (PBF-LB) was performed for Ti-6Al-4Nb-4Zr (mass％) developed by our group to improve the oxidation resistance at temperatures greater than 600℃ by adding Nb and Zr to near-α alloys. Microstructure evolution of the PBF-LB samples by heat treatment was investigated,...
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| Veröffentlicht in: | Journal of the Japan Institute of Metals and Materials 2024/09/01, Vol.88(9), pp.163-170 |
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| creator | Yamabe-Mitarai, Yoko Inoue, Takashi Kuroda, Tomoki Matsunaga, Sae Toda, Yoshiaki Matsunaga, Tetsuya Ito, Tsutomu Ozasa, Ryosuke Ishimoto, Takuya Nakano, Takayoshi |
| description | Powder bed fusion using a laser beam (PBF-LB) was performed for Ti-6Al-4Nb-4Zr (mass％) developed by our group to improve the oxidation resistance at temperatures greater than 600℃ by adding Nb and Zr to near-α alloys. Microstructure evolution of the PBF-LB samples by heat treatment was investigated, especially for heat treatment duration in the α + β phase, cooling rate, and heat treatment in the β phase. The equiaxed α phase formed during heat treatment along the melting-pool boundaries. The high volume fraction of the α phase and high Nb contents in the β phase was obtained by slow cooling (furnace cooling) compared with fast cooling (air cooling). The α/β lamellar structure formed in the melting pool boundaries with 100 µm in size and no equiaxed α phase formed along the boundaries by heat treatment in the β phase regime. Creep life at 600℃ and 137 MPa was similar for the air-cooled and furnace-cooled samples, but the slightly slower deformation was obtained in the furnace-cooled sample. Creep life of the sample heat treated in the β phase region drastically increased due to the absence of the equiaxed α phase. Dominant deformation mechanism of creep was grain boundary sliding. The small equiaxed α phase accelerated grain boundary sliding. Mater. Trans. 64 (2023) 1175-1182に掲載．AbstractおよびFigs. 5-9のキャプションを修正． |
| doi_str_mv | 10.2320/jinstmet.JA202406 |
| format | Article |
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Microstructure evolution of the PBF-LB samples by heat treatment was investigated, especially for heat treatment duration in the α + β phase, cooling rate, and heat treatment in the β phase. The equiaxed α phase formed during heat treatment along the melting-pool boundaries. The high volume fraction of the α phase and high Nb contents in the β phase was obtained by slow cooling (furnace cooling) compared with fast cooling (air cooling). The α/β lamellar structure formed in the melting pool boundaries with 100 µm in size and no equiaxed α phase formed along the boundaries by heat treatment in the β phase regime. Creep life at 600℃ and 137 MPa was similar for the air-cooled and furnace-cooled samples, but the slightly slower deformation was obtained in the furnace-cooled sample. Creep life of the sample heat treated in the β phase region drastically increased due to the absence of the equiaxed α phase. Dominant deformation mechanism of creep was grain boundary sliding. The small equiaxed α phase accelerated grain boundary sliding. Mater. Trans. 64 (2023) 1175-1182に掲載．AbstractおよびFigs. 5-9のキャプションを修正．</description><identifier>ISSN: 0021-4876</identifier><identifier>EISSN: 1880-6880</identifier><identifier>DOI: 10.2320/jinstmet.JA202406</identifier><language>eng ; jpn</language><publisher>Sendai: The Japan Institute of Metals and Materials</publisher><subject>Air cooling ; Beta phase ; Boundaries ; Cooling ; Cooling rate ; creep ; Creep life ; Creep tests ; deformation mechanism ; Deformation mechanisms ; Equiaxed structure ; Grain boundaries ; Grain boundary sliding ; Grain size ; Heat treating ; Heat treatment ; heat-resistant Ti alloys ; Lamellar structure ; Laser beams ; Melting ; Microstructure ; Niobium ; Oxidation resistance ; Powder beds ; selective laser melting ; Zirconium</subject><ispartof>Journal of the Japan Institute of Metals and Materials, 2024/09/01, Vol.88(9), pp.163-170</ispartof><rights>2024 The Japan Institute of Metals and Materials</rights><rights>Copyright Japan Science and Technology Agency 2024</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c291t-d920ffc7a3703d5e9581132b63961bb5c48b952fde5c68ffbf6e727adda900373</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,781,785,1884,27929,27930</link.rule.ids></links><search><creatorcontrib>Yamabe-Mitarai, Yoko</creatorcontrib><creatorcontrib>Inoue, Takashi</creatorcontrib><creatorcontrib>Kuroda, Tomoki</creatorcontrib><creatorcontrib>Matsunaga, Sae</creatorcontrib><creatorcontrib>Toda, Yoshiaki</creatorcontrib><creatorcontrib>Matsunaga, Tetsuya</creatorcontrib><creatorcontrib>Ito, Tsutomu</creatorcontrib><creatorcontrib>Ozasa, Ryosuke</creatorcontrib><creatorcontrib>Ishimoto, Takuya</creatorcontrib><creatorcontrib>Nakano, Takayoshi</creatorcontrib><title>Creep Behavior of Ti-6Al-4Nb-4Zr Fabricated by Powder Bed Fusion Using a Laser Beam</title><title>Journal of the Japan Institute of Metals and Materials</title><addtitle>J. Japan Inst. Metals and Materials</addtitle><description>Powder bed fusion using a laser beam (PBF-LB) was performed for Ti-6Al-4Nb-4Zr (mass％) developed by our group to improve the oxidation resistance at temperatures greater than 600℃ by adding Nb and Zr to near-α alloys. Microstructure evolution of the PBF-LB samples by heat treatment was investigated, especially for heat treatment duration in the α + β phase, cooling rate, and heat treatment in the β phase. The equiaxed α phase formed during heat treatment along the melting-pool boundaries. The high volume fraction of the α phase and high Nb contents in the β phase was obtained by slow cooling (furnace cooling) compared with fast cooling (air cooling). The α/β lamellar structure formed in the melting pool boundaries with 100 µm in size and no equiaxed α phase formed along the boundaries by heat treatment in the β phase regime. Creep life at 600℃ and 137 MPa was similar for the air-cooled and furnace-cooled samples, but the slightly slower deformation was obtained in the furnace-cooled sample. Creep life of the sample heat treated in the β phase region drastically increased due to the absence of the equiaxed α phase. Dominant deformation mechanism of creep was grain boundary sliding. The small equiaxed α phase accelerated grain boundary sliding. Mater. Trans. 64 (2023) 1175-1182に掲載．AbstractおよびFigs. 5-9のキャプションを修正．</description><subject>Air cooling</subject><subject>Beta phase</subject><subject>Boundaries</subject><subject>Cooling</subject><subject>Cooling rate</subject><subject>creep</subject><subject>Creep life</subject><subject>Creep tests</subject><subject>deformation mechanism</subject><subject>Deformation mechanisms</subject><subject>Equiaxed structure</subject><subject>Grain boundaries</subject><subject>Grain boundary sliding</subject><subject>Grain size</subject><subject>Heat treating</subject><subject>Heat treatment</subject><subject>heat-resistant Ti alloys</subject><subject>Lamellar structure</subject><subject>Laser beams</subject><subject>Melting</subject><subject>Microstructure</subject><subject>Niobium</subject><subject>Oxidation resistance</subject><subject>Powder beds</subject><subject>selective laser melting</subject><subject>Zirconium</subject><issn>0021-4876</issn><issn>1880-6880</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><recordid>eNpFkMFOAjEQhhujiUR5AG9NPC9O291ue0QiqCFqIly8NO22xRLYxXbR8PYuInqZOcz3zUx-hK4IDCijcLMMdWrXrh08DinQHPgJ6hEhIONdOUU9AEqyXJT8HPVTCgYAJCccZA-9jqJzG3zr3vVnaCJuPJ6FjA9XWf5ksvwt4rE2MVS6dRabHX5pvqyLHW_xeJtCU-N5CvUCazzV6Weg15fozOtVcv3ffoHm47vZ6D6bPk8eRsNpVlFJ2sxKCt5XpWYlMFs4WQhCGDWcdc8ZU1S5MLKg3rqi4sJ747kraamt1RKAlewCXR_2bmLzsXWpVctmG-vupGKE8IIB5KKjyIGqYpNSdF5tYljruFME1D4-dYxPHePrnMnBWaZWL9yfoWMbqpX7N4RQcl-O5h9RveuoXM2-AWhlfJk</recordid><startdate>20240101</startdate><enddate>20240101</enddate><creator>Yamabe-Mitarai, Yoko</creator><creator>Inoue, Takashi</creator><creator>Kuroda, Tomoki</creator><creator>Matsunaga, Sae</creator><creator>Toda, Yoshiaki</creator><creator>Matsunaga, Tetsuya</creator><creator>Ito, Tsutomu</creator><creator>Ozasa, Ryosuke</creator><creator>Ishimoto, Takuya</creator><creator>Nakano, Takayoshi</creator><general>The Japan Institute of Metals and Materials</general><general>Japan Science and Technology Agency</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20240101</creationdate><title>Creep Behavior of Ti-6Al-4Nb-4Zr Fabricated by Powder Bed Fusion Using a Laser Beam</title><author>Yamabe-Mitarai, Yoko ; Inoue, Takashi ; Kuroda, Tomoki ; Matsunaga, Sae ; Toda, Yoshiaki ; Matsunaga, Tetsuya ; Ito, Tsutomu ; Ozasa, Ryosuke ; Ishimoto, Takuya ; Nakano, Takayoshi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c291t-d920ffc7a3703d5e9581132b63961bb5c48b952fde5c68ffbf6e727adda900373</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng ; jpn</language><creationdate>2024</creationdate><topic>Air cooling</topic><topic>Beta phase</topic><topic>Boundaries</topic><topic>Cooling</topic><topic>Cooling rate</topic><topic>creep</topic><topic>Creep life</topic><topic>Creep tests</topic><topic>deformation mechanism</topic><topic>Deformation mechanisms</topic><topic>Equiaxed structure</topic><topic>Grain boundaries</topic><topic>Grain boundary sliding</topic><topic>Grain size</topic><topic>Heat treating</topic><topic>Heat treatment</topic><topic>heat-resistant Ti alloys</topic><topic>Lamellar structure</topic><topic>Laser beams</topic><topic>Melting</topic><topic>Microstructure</topic><topic>Niobium</topic><topic>Oxidation resistance</topic><topic>Powder beds</topic><topic>selective laser melting</topic><topic>Zirconium</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yamabe-Mitarai, Yoko</creatorcontrib><creatorcontrib>Inoue, Takashi</creatorcontrib><creatorcontrib>Kuroda, Tomoki</creatorcontrib><creatorcontrib>Matsunaga, Sae</creatorcontrib><creatorcontrib>Toda, Yoshiaki</creatorcontrib><creatorcontrib>Matsunaga, Tetsuya</creatorcontrib><creatorcontrib>Ito, Tsutomu</creatorcontrib><creatorcontrib>Ozasa, Ryosuke</creatorcontrib><creatorcontrib>Ishimoto, Takuya</creatorcontrib><creatorcontrib>Nakano, Takayoshi</creatorcontrib><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of the Japan Institute of Metals and Materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yamabe-Mitarai, Yoko</au><au>Inoue, Takashi</au><au>Kuroda, Tomoki</au><au>Matsunaga, Sae</au><au>Toda, Yoshiaki</au><au>Matsunaga, Tetsuya</au><au>Ito, Tsutomu</au><au>Ozasa, Ryosuke</au><au>Ishimoto, Takuya</au><au>Nakano, Takayoshi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Creep Behavior of Ti-6Al-4Nb-4Zr Fabricated by Powder Bed Fusion Using a Laser Beam</atitle><jtitle>Journal of the Japan Institute of Metals and Materials</jtitle><addtitle>J. Japan Inst. Metals and Materials</addtitle><date>2024-01-01</date><risdate>2024</risdate><volume>88</volume><issue>9</issue><spage>163</spage><epage>170</epage><pages>163-170</pages><artnum>JA202406</artnum><issn>0021-4876</issn><eissn>1880-6880</eissn><abstract>Powder bed fusion using a laser beam (PBF-LB) was performed for Ti-6Al-4Nb-4Zr (mass％) developed by our group to improve the oxidation resistance at temperatures greater than 600℃ by adding Nb and Zr to near-α alloys. Microstructure evolution of the PBF-LB samples by heat treatment was investigated, especially for heat treatment duration in the α + β phase, cooling rate, and heat treatment in the β phase. The equiaxed α phase formed during heat treatment along the melting-pool boundaries. The high volume fraction of the α phase and high Nb contents in the β phase was obtained by slow cooling (furnace cooling) compared with fast cooling (air cooling). The α/β lamellar structure formed in the melting pool boundaries with 100 µm in size and no equiaxed α phase formed along the boundaries by heat treatment in the β phase regime. Creep life at 600℃ and 137 MPa was similar for the air-cooled and furnace-cooled samples, but the slightly slower deformation was obtained in the furnace-cooled sample. Creep life of the sample heat treated in the β phase region drastically increased due to the absence of the equiaxed α phase. Dominant deformation mechanism of creep was grain boundary sliding. The small equiaxed α phase accelerated grain boundary sliding. Mater. Trans. 64 (2023) 1175-1182に掲載．AbstractおよびFigs. 5-9のキャプションを修正．</abstract><cop>Sendai</cop><pub>The Japan Institute of Metals and Materials</pub><doi>10.2320/jinstmet.JA202406</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Air cooling Beta phase Boundaries Cooling Cooling rate creep Creep life Creep tests deformation mechanism Deformation mechanisms Equiaxed structure Grain boundaries Grain boundary sliding Grain size Heat treating Heat treatment heat-resistant Ti alloys Lamellar structure Laser beams Melting Microstructure Niobium Oxidation resistance Powder beds selective laser melting Zirconium |
| title | Creep Behavior of Ti-6Al-4Nb-4Zr Fabricated by Powder Bed Fusion Using a Laser Beam |
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