Competition between work-hardening effect and dynamic-softening behavior for processing as-cast GH4720Li superalloys with original dendrite microstructure during moderate-speed hot compression
Competition between work-hardening effect and dynamic-softening behavior of as-cast GH4720Li superalloys with original dendrite microstructure during moderate-speed deformation was quantitatively investigated in this present paper. Flow behavior for processing the studied alloys with dendrite micros...
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| Veröffentlicht in: | Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2015-08, Vol.642, p.187-193 |
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| container_title | Materials science & engineering. A, Structural materials : properties, microstructure and processing |
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| creator | Ning, Y.Q. Wang, T. Fu, M.W. Li, M.Z. Wang, L. Zhao, C.D. |
| description | Competition between work-hardening effect and dynamic-softening behavior of as-cast GH4720Li superalloys with original dendrite microstructure during moderate-speed deformation was quantitatively investigated in this present paper. Flow behavior for processing the studied alloys with dendrite microstructure behaves typical three stages, caused by the competition effect between work-hardening and dynamic-softening. The relationships between work-hardening rate and true strain and true stress were derived from Kocks–Mecking dislocation relation. The work-hardening effect shows two obvious stages with strain, viz. steady fluctuations and linear decreasing. An obvious work-hardening effect was demonstrated under lower temperature and higher strain rate. The linear relationship of work-hardening rate θ on true stress ε was constructed with the slope only related to annihilation coefficient Ω. The microstructural mechanism of as-cast GH4720Li superalloys during moderate-speed deformation was referred to dislocation multiplication and dendrite fragmentation, and the latter was beneficial to dynamic recrystallization during moderate-speed deformation. |
| doi_str_mv | 10.1016/j.msea.2015.07.007 |
| format | Article |
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Flow behavior for processing the studied alloys with dendrite microstructure behaves typical three stages, caused by the competition effect between work-hardening and dynamic-softening. The relationships between work-hardening rate and true strain and true stress were derived from Kocks–Mecking dislocation relation. The work-hardening effect shows two obvious stages with strain, viz. steady fluctuations and linear decreasing. An obvious work-hardening effect was demonstrated under lower temperature and higher strain rate. The linear relationship of work-hardening rate θ on true stress ε was constructed with the slope only related to annihilation coefficient Ω. The microstructural mechanism of as-cast GH4720Li superalloys during moderate-speed deformation was referred to dislocation multiplication and dendrite fragmentation, and the latter was beneficial to dynamic recrystallization during moderate-speed deformation.</description><identifier>ISSN: 0921-5093</identifier><identifier>EISSN: 1873-4936</identifier><identifier>DOI: 10.1016/j.msea.2015.07.007</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Competition ; Deformation ; Dendritic structure ; Dislocation ; Dislocations ; Dynamic-softening (DS) ; GH4720Li superalloys ; Hot deformation ; Microstructural mechanism ; Microstructure ; Slopes ; Superalloys ; True stress ; Work-hardening (WH)</subject><ispartof>Materials science & engineering. A, Structural materials : properties, microstructure and processing, 2015-08, Vol.642, p.187-193</ispartof><rights>2015 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c333t-b96f51c71bbd7fe09a67ddc168065957a85c014b270b7605dfd2e3d9fe2de233</citedby><cites>FETCH-LOGICAL-c333t-b96f51c71bbd7fe09a67ddc168065957a85c014b270b7605dfd2e3d9fe2de233</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.msea.2015.07.007$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Ning, Y.Q.</creatorcontrib><creatorcontrib>Wang, T.</creatorcontrib><creatorcontrib>Fu, M.W.</creatorcontrib><creatorcontrib>Li, M.Z.</creatorcontrib><creatorcontrib>Wang, L.</creatorcontrib><creatorcontrib>Zhao, C.D.</creatorcontrib><title>Competition between work-hardening effect and dynamic-softening behavior for processing as-cast GH4720Li superalloys with original dendrite microstructure during moderate-speed hot compression</title><title>Materials science & engineering. A, Structural materials : properties, microstructure and processing</title><description>Competition between work-hardening effect and dynamic-softening behavior of as-cast GH4720Li superalloys with original dendrite microstructure during moderate-speed deformation was quantitatively investigated in this present paper. Flow behavior for processing the studied alloys with dendrite microstructure behaves typical three stages, caused by the competition effect between work-hardening and dynamic-softening. The relationships between work-hardening rate and true strain and true stress were derived from Kocks–Mecking dislocation relation. The work-hardening effect shows two obvious stages with strain, viz. steady fluctuations and linear decreasing. An obvious work-hardening effect was demonstrated under lower temperature and higher strain rate. The linear relationship of work-hardening rate θ on true stress ε was constructed with the slope only related to annihilation coefficient Ω. The microstructural mechanism of as-cast GH4720Li superalloys during moderate-speed deformation was referred to dislocation multiplication and dendrite fragmentation, and the latter was beneficial to dynamic recrystallization during moderate-speed deformation.</description><subject>Competition</subject><subject>Deformation</subject><subject>Dendritic structure</subject><subject>Dislocation</subject><subject>Dislocations</subject><subject>Dynamic-softening (DS)</subject><subject>GH4720Li superalloys</subject><subject>Hot deformation</subject><subject>Microstructural mechanism</subject><subject>Microstructure</subject><subject>Slopes</subject><subject>Superalloys</subject><subject>True stress</subject><subject>Work-hardening (WH)</subject><issn>0921-5093</issn><issn>1873-4936</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNp9UcFu2zAMFYYNWNbtB3bScRd7lBVbMbDLEGxtgQC99C7IEtUotSVXkhvk7_Zpk5GeeyAIkHyPfHyEfGdQM2Ddz1M9JVR1A6ytQdQA4gPZsJ3g1bbn3Ueygb5hVQs9_0y-pHQCALaFdkP-7cM0Y3bZBU8HzGdET88hPldHFQ16558oWos6U-UNNRevJqerFGy-Ngc8qlcXIrUl5hg0prTWVaq0Spne3m1FAwdH0zJjVOMYLomeXT7SEN2T82qkZY2JLiMtzDGkHBedl4jULHFlmoIpwIxVmhENPYZMdTk6rouC_0o-WTUm_PaWb8jj3z-P-7vq8HB7v_99qDTnPFdD39mWacGGwQiL0KtOGKNZt4Ou7Vuhdq0uLxkaAYPooDXWNMhNb7Ex2HB-Q35caYvElwVTlpNLGsdReQxLkkywXaERvCujzXV0FZMiWjlHN6l4kQzk6pY8ydUtubolQcjiVgH9uoKwaHh1GGXSDr1G42J5vjTBvQf_D_nopGs</recordid><startdate>20150826</startdate><enddate>20150826</enddate><creator>Ning, Y.Q.</creator><creator>Wang, T.</creator><creator>Fu, M.W.</creator><creator>Li, M.Z.</creator><creator>Wang, L.</creator><creator>Zhao, C.D.</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20150826</creationdate><title>Competition between work-hardening effect and dynamic-softening behavior for processing as-cast GH4720Li superalloys with original dendrite microstructure during moderate-speed hot compression</title><author>Ning, Y.Q. ; Wang, T. ; Fu, M.W. ; Li, M.Z. ; Wang, L. ; Zhao, C.D.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c333t-b96f51c71bbd7fe09a67ddc168065957a85c014b270b7605dfd2e3d9fe2de233</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Competition</topic><topic>Deformation</topic><topic>Dendritic structure</topic><topic>Dislocation</topic><topic>Dislocations</topic><topic>Dynamic-softening (DS)</topic><topic>GH4720Li superalloys</topic><topic>Hot deformation</topic><topic>Microstructural mechanism</topic><topic>Microstructure</topic><topic>Slopes</topic><topic>Superalloys</topic><topic>True stress</topic><topic>Work-hardening (WH)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ning, Y.Q.</creatorcontrib><creatorcontrib>Wang, T.</creatorcontrib><creatorcontrib>Fu, M.W.</creatorcontrib><creatorcontrib>Li, M.Z.</creatorcontrib><creatorcontrib>Wang, L.</creatorcontrib><creatorcontrib>Zhao, C.D.</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. A, Structural materials : properties, microstructure and processing</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ning, Y.Q.</au><au>Wang, T.</au><au>Fu, M.W.</au><au>Li, M.Z.</au><au>Wang, L.</au><au>Zhao, C.D.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Competition between work-hardening effect and dynamic-softening behavior for processing as-cast GH4720Li superalloys with original dendrite microstructure during moderate-speed hot compression</atitle><jtitle>Materials science & engineering. A, Structural materials : properties, microstructure and processing</jtitle><date>2015-08-26</date><risdate>2015</risdate><volume>642</volume><spage>187</spage><epage>193</epage><pages>187-193</pages><issn>0921-5093</issn><eissn>1873-4936</eissn><abstract>Competition between work-hardening effect and dynamic-softening behavior of as-cast GH4720Li superalloys with original dendrite microstructure during moderate-speed deformation was quantitatively investigated in this present paper. Flow behavior for processing the studied alloys with dendrite microstructure behaves typical three stages, caused by the competition effect between work-hardening and dynamic-softening. The relationships between work-hardening rate and true strain and true stress were derived from Kocks–Mecking dislocation relation. The work-hardening effect shows two obvious stages with strain, viz. steady fluctuations and linear decreasing. An obvious work-hardening effect was demonstrated under lower temperature and higher strain rate. The linear relationship of work-hardening rate θ on true stress ε was constructed with the slope only related to annihilation coefficient Ω. The microstructural mechanism of as-cast GH4720Li superalloys during moderate-speed deformation was referred to dislocation multiplication and dendrite fragmentation, and the latter was beneficial to dynamic recrystallization during moderate-speed deformation.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.msea.2015.07.007</doi><tpages>7</tpages></addata></record> |
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| subjects | Competition Deformation Dendritic structure Dislocation Dislocations Dynamic-softening (DS) GH4720Li superalloys Hot deformation Microstructural mechanism Microstructure Slopes Superalloys True stress Work-hardening (WH) |
| title | Competition between work-hardening effect and dynamic-softening behavior for processing as-cast GH4720Li superalloys with original dendrite microstructure during moderate-speed hot compression |
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