Tuning deformation behavior of Cu0.5CoNiCrAl high-entropy alloy via cooling rate gradient: An atomistic study
The deformation behaviors of body-centered cubic Cu0.5CoNiCrAl high-entropy alloys processed by the cooling rate gradient are investigated by the molecular dynamics simulations. The plastic deformation ability of the high-entropy alloy is significantly improved by triggering multiple-type dislocatio...
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| Veröffentlicht in: | Intermetallics 2019-09, Vol.112, p.106553, Article 106553 |
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| creator | Feng, Shidong Li, Lin Chan, K.C. Zhao, Lei Pan, Shaopeng Wang, Limin Liu, Riping |
| description | The deformation behaviors of body-centered cubic Cu0.5CoNiCrAl high-entropy alloys processed by the cooling rate gradient are investigated by the molecular dynamics simulations. The plastic deformation ability of the high-entropy alloy is significantly improved by triggering multiple-type dislocation slips along different deformation paths. The cooling rate gradient introduces abundant atomic vacancies, proliferating the nucleation sites of dislocations. Additionally, the nucleation barriers of dislocations are reduced by the resultant structural disorder, high potential energy and chemical segregation. Consequently, the cooling rate gradient enhances the structural heterogeneity, promoting the formation of multiple deformation paths and preventing strain localization.
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•The high-entropy alloys processed by the cooling rate gradient were investigated.•The cooling rate gradient enhances the structural heterogeneity.•The cooling rate gradient proliferates the nucleation sites of dislocations.•The cooling rate gradient can trigger multiple-type dislocation slips. |
| doi_str_mv | 10.1016/j.intermet.2019.106553 |
| format | Article |
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[Display omitted]
•The high-entropy alloys processed by the cooling rate gradient were investigated.•The cooling rate gradient enhances the structural heterogeneity.•The cooling rate gradient proliferates the nucleation sites of dislocations.•The cooling rate gradient can trigger multiple-type dislocation slips.</description><identifier>ISSN: 0966-9795</identifier><identifier>EISSN: 1879-0216</identifier><identifier>DOI: 10.1016/j.intermet.2019.106553</identifier><language>eng</language><publisher>Barking: Elsevier Ltd</publisher><subject>A. High–entropy alloys ; Alloys ; B. Dislocation structure ; Cooling ; Cooling rate ; D. Grain boundary ; D. Microstructure ; D. Plastic deformation unit ; Dislocations ; E. Molecular dynamic simulation ; Entropy ; High entropy alloys ; Molecular dynamics ; Nucleation ; Organic chemistry ; Plastic deformation ; Potential energy ; Strain localization</subject><ispartof>Intermetallics, 2019-09, Vol.112, p.106553, Article 106553</ispartof><rights>2019</rights><rights>Copyright Elsevier BV Sep 2019</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c388t-ec976586c9b34cbf6148833dfc34161e3e4cfa1038bdade78c20a6a7bf408fd53</citedby><cites>FETCH-LOGICAL-c388t-ec976586c9b34cbf6148833dfc34161e3e4cfa1038bdade78c20a6a7bf408fd53</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.intermet.2019.106553$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3549,27923,27924,45994</link.rule.ids></links><search><creatorcontrib>Feng, Shidong</creatorcontrib><creatorcontrib>Li, Lin</creatorcontrib><creatorcontrib>Chan, K.C.</creatorcontrib><creatorcontrib>Zhao, Lei</creatorcontrib><creatorcontrib>Pan, Shaopeng</creatorcontrib><creatorcontrib>Wang, Limin</creatorcontrib><creatorcontrib>Liu, Riping</creatorcontrib><title>Tuning deformation behavior of Cu0.5CoNiCrAl high-entropy alloy via cooling rate gradient: An atomistic study</title><title>Intermetallics</title><description>The deformation behaviors of body-centered cubic Cu0.5CoNiCrAl high-entropy alloys processed by the cooling rate gradient are investigated by the molecular dynamics simulations. The plastic deformation ability of the high-entropy alloy is significantly improved by triggering multiple-type dislocation slips along different deformation paths. The cooling rate gradient introduces abundant atomic vacancies, proliferating the nucleation sites of dislocations. Additionally, the nucleation barriers of dislocations are reduced by the resultant structural disorder, high potential energy and chemical segregation. Consequently, the cooling rate gradient enhances the structural heterogeneity, promoting the formation of multiple deformation paths and preventing strain localization.
[Display omitted]
•The high-entropy alloys processed by the cooling rate gradient were investigated.•The cooling rate gradient enhances the structural heterogeneity.•The cooling rate gradient proliferates the nucleation sites of dislocations.•The cooling rate gradient can trigger multiple-type dislocation slips.</description><subject>A. High–entropy alloys</subject><subject>Alloys</subject><subject>B. Dislocation structure</subject><subject>Cooling</subject><subject>Cooling rate</subject><subject>D. Grain boundary</subject><subject>D. Microstructure</subject><subject>D. Plastic deformation unit</subject><subject>Dislocations</subject><subject>E. Molecular dynamic simulation</subject><subject>Entropy</subject><subject>High entropy alloys</subject><subject>Molecular dynamics</subject><subject>Nucleation</subject><subject>Organic chemistry</subject><subject>Plastic deformation</subject><subject>Potential energy</subject><subject>Strain localization</subject><issn>0966-9795</issn><issn>1879-0216</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNqFkEGL2zAUhEXpQtNs_0IR9OysZNmy1FOD6W4Xwu5l9yxk6SlRsK1UkgP-93Vwe-7pwTAzj_kQ-krJjhLKH847P2aIA-RdSahcRF7X7APaUNHIgpSUf0QbIjkvZCPrT-hzSmdCaENYvUHD2zT68YgtuBAHnX0YcQcnffUh4uBwO5Fd3YYX38Z9j0_-eCpgzDFcZqz7Psz46jU2IfS3kqgz4GPU1i-e73g_Yp3D4FP2Bqc82fke3TndJ_jy927R--PPt_ZXcXh9em73h8IwIXIBRja8FtzIjlWmc5xWQjBmnWEV5RQYVMZpSpjorLbQCFMSzXXTuYoIZ2u2Rd_W3ksMvydIWZ3DFMflpSpLQSopaUUXF19dJoaUIjh1iX7QcVaUqBtadVb_0KobWrWiXYI_1iAsG64eokpmmWzA-ggmKxv8_yr-ADqchvk</recordid><startdate>201909</startdate><enddate>201909</enddate><creator>Feng, Shidong</creator><creator>Li, Lin</creator><creator>Chan, K.C.</creator><creator>Zhao, Lei</creator><creator>Pan, Shaopeng</creator><creator>Wang, Limin</creator><creator>Liu, Riping</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>201909</creationdate><title>Tuning deformation behavior of Cu0.5CoNiCrAl high-entropy alloy via cooling rate gradient: An atomistic study</title><author>Feng, Shidong ; Li, Lin ; Chan, K.C. ; Zhao, Lei ; Pan, Shaopeng ; Wang, Limin ; Liu, Riping</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c388t-ec976586c9b34cbf6148833dfc34161e3e4cfa1038bdade78c20a6a7bf408fd53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>A. High–entropy alloys</topic><topic>Alloys</topic><topic>B. Dislocation structure</topic><topic>Cooling</topic><topic>Cooling rate</topic><topic>D. Grain boundary</topic><topic>D. Microstructure</topic><topic>D. Plastic deformation unit</topic><topic>Dislocations</topic><topic>E. Molecular dynamic simulation</topic><topic>Entropy</topic><topic>High entropy alloys</topic><topic>Molecular dynamics</topic><topic>Nucleation</topic><topic>Organic chemistry</topic><topic>Plastic deformation</topic><topic>Potential energy</topic><topic>Strain localization</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Feng, Shidong</creatorcontrib><creatorcontrib>Li, Lin</creatorcontrib><creatorcontrib>Chan, K.C.</creatorcontrib><creatorcontrib>Zhao, Lei</creatorcontrib><creatorcontrib>Pan, Shaopeng</creatorcontrib><creatorcontrib>Wang, Limin</creatorcontrib><creatorcontrib>Liu, Riping</creatorcontrib><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Intermetallics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Feng, Shidong</au><au>Li, Lin</au><au>Chan, K.C.</au><au>Zhao, Lei</au><au>Pan, Shaopeng</au><au>Wang, Limin</au><au>Liu, Riping</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Tuning deformation behavior of Cu0.5CoNiCrAl high-entropy alloy via cooling rate gradient: An atomistic study</atitle><jtitle>Intermetallics</jtitle><date>2019-09</date><risdate>2019</risdate><volume>112</volume><spage>106553</spage><pages>106553-</pages><artnum>106553</artnum><issn>0966-9795</issn><eissn>1879-0216</eissn><abstract>The deformation behaviors of body-centered cubic Cu0.5CoNiCrAl high-entropy alloys processed by the cooling rate gradient are investigated by the molecular dynamics simulations. The plastic deformation ability of the high-entropy alloy is significantly improved by triggering multiple-type dislocation slips along different deformation paths. The cooling rate gradient introduces abundant atomic vacancies, proliferating the nucleation sites of dislocations. Additionally, the nucleation barriers of dislocations are reduced by the resultant structural disorder, high potential energy and chemical segregation. Consequently, the cooling rate gradient enhances the structural heterogeneity, promoting the formation of multiple deformation paths and preventing strain localization.
[Display omitted]
•The high-entropy alloys processed by the cooling rate gradient were investigated.•The cooling rate gradient enhances the structural heterogeneity.•The cooling rate gradient proliferates the nucleation sites of dislocations.•The cooling rate gradient can trigger multiple-type dislocation slips.</abstract><cop>Barking</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.intermet.2019.106553</doi><oa>free_for_read</oa></addata></record> |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | A. High–entropy alloys Alloys B. Dislocation structure Cooling Cooling rate D. Grain boundary D. Microstructure D. Plastic deformation unit Dislocations E. Molecular dynamic simulation Entropy High entropy alloys Molecular dynamics Nucleation Organic chemistry Plastic deformation Potential energy Strain localization |
| title | Tuning deformation behavior of Cu0.5CoNiCrAl high-entropy alloy via cooling rate gradient: An atomistic study |
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