Nanoindentation creep behavior of diverse microstructures in a pre-strained interstitial high-entropy alloy by high-throughput mapping
Time-dependent plastic deformation, also known as creep, can occur in high-melting-point materials at room temperature when subjected to submicron plastic contact (e.g., components in micro-electronic mechanical systems) due to the extremely high stress conditions. Previous investigations of creep b...
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description | Time-dependent plastic deformation, also known as creep, can occur in high-melting-point materials at room temperature when subjected to submicron plastic contact (e.g., components in micro-electronic mechanical systems) due to the extremely high stress conditions. Previous investigations of creep behavior at submicron scale mainly focus on uniform microstructures, whereas recently developed high-performance structural materials usually show complex microstructural heterogeneities. Here, we demonstrate a high-throughput nanoindentation approach to unveil the creep behavior of locally diverse microstructures, via a case study on an interstitial high-entropy alloy (iHEA). The prototype iHEA specimen was firstly pre-strained by severe cold-rolling to achieve diverse microstructure features including dense dislocations, nanotwins and nanograins. Nanoindentation mapping with 144 indents is conducted to collect creep data from all types of diverse microstructures, followed by systematical calculations based on power-law analysis. Then intuitive contour maps of nanohardness (H), strain rate (ε˙) and stress exponent (n) are attained. The individual creep mechanism of each microstructure variant is evaluated by correlating local microstructure features with corresponding creep responses from these contour maps. With the increase of n value for different sample regions, the ε˙ value inversely reduces and the corresponding dominant creep mechanism gradually converts from diffusion-mediated mode to dislocation-controlled one. The presence of nanograins and nanotwins significantly hinders dislocation interactions and promotes stress-induced diffusion. This work verifies that nanoindentation creep behavior is highly correlated with local microstructure features, and the mapping approach is feasible for evaluating creep-resistance of locally diverse microstructures under extremely high-stress conditions.
•High-throughput nanoindentation tests are conducted on an interstitial high-entropy alloy with diverse microstructure features.•Nanoindentation mapping including nanohardness (H), strain rate (ε˙) and stress exponent (n) uncovers the individual creep behavior of each microstructural variant.•Correlated the value of H, ε˙ and n with local microstructures of all indent positions, the creep mechanisms originating from each assembly of microstructural variants are elucidated.•Dominant creep mechanisms of all indents convert from diffusion-mediated model to dislocation-contr |
doi_str_mv | 10.1016/j.msea.2022.143988 |
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•High-throughput nanoindentation tests are conducted on an interstitial high-entropy alloy with diverse microstructure features.•Nanoindentation mapping including nanohardness (H), strain rate (ε˙) and stress exponent (n) uncovers the individual creep behavior of each microstructural variant.•Correlated the value of H, ε˙ and n with local microstructures of all indent positions, the creep mechanisms originating from each assembly of microstructural variants are elucidated.•Dominant creep mechanisms of all indents convert from diffusion-mediated model to dislocation-controlled one with the increase of n value.•This work provides an approach to efficiently probe the creep behavior of materials with diverse microstructures at the nanoscale.</description><identifier>ISSN: 0921-5093</identifier><identifier>EISSN: 1873-4936</identifier><identifier>DOI: 10.1016/j.msea.2022.143988</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Cold rolling ; Contact melting ; Contours ; Creep mechanism ; Creep strength ; Diffusion ; Dislocation density ; Diverse microstructures ; High entropy alloys ; High-entropy alloy ; Mapping ; Mechanical systems ; Melting points ; Microstructure ; Nanohardness ; Nanoindentation ; Plastic deformation ; Room temperature ; Strain rate</subject><ispartof>Materials science & engineering. A, Structural materials : properties, microstructure and processing, 2022-10, Vol.856, p.143988, Article 143988</ispartof><rights>2022 Elsevier B.V.</rights><rights>Copyright Elsevier BV Oct 20, 2022</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c328t-b16a976e837eb4bf2ff7d51e474b470ac54bc0703e2afed173d9fb32a817e57f3</citedby><cites>FETCH-LOGICAL-c328t-b16a976e837eb4bf2ff7d51e474b470ac54bc0703e2afed173d9fb32a817e57f3</cites><orcidid>0000-0002-8170-5621 ; 0000-0001-5680-2094</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0921509322013673$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65534</link.rule.ids></links><search><creatorcontrib>Fan, Qimeng</creatorcontrib><creatorcontrib>Gan, Kefu</creatorcontrib><creatorcontrib>Yan, Dingshun</creatorcontrib><creatorcontrib>Li, Zhiming</creatorcontrib><title>Nanoindentation creep behavior of diverse microstructures in a pre-strained interstitial high-entropy alloy by high-throughput mapping</title><title>Materials science & engineering. A, Structural materials : properties, microstructure and processing</title><description>Time-dependent plastic deformation, also known as creep, can occur in high-melting-point materials at room temperature when subjected to submicron plastic contact (e.g., components in micro-electronic mechanical systems) due to the extremely high stress conditions. Previous investigations of creep behavior at submicron scale mainly focus on uniform microstructures, whereas recently developed high-performance structural materials usually show complex microstructural heterogeneities. Here, we demonstrate a high-throughput nanoindentation approach to unveil the creep behavior of locally diverse microstructures, via a case study on an interstitial high-entropy alloy (iHEA). The prototype iHEA specimen was firstly pre-strained by severe cold-rolling to achieve diverse microstructure features including dense dislocations, nanotwins and nanograins. Nanoindentation mapping with 144 indents is conducted to collect creep data from all types of diverse microstructures, followed by systematical calculations based on power-law analysis. Then intuitive contour maps of nanohardness (H), strain rate (ε˙) and stress exponent (n) are attained. The individual creep mechanism of each microstructure variant is evaluated by correlating local microstructure features with corresponding creep responses from these contour maps. With the increase of n value for different sample regions, the ε˙ value inversely reduces and the corresponding dominant creep mechanism gradually converts from diffusion-mediated mode to dislocation-controlled one. The presence of nanograins and nanotwins significantly hinders dislocation interactions and promotes stress-induced diffusion. This work verifies that nanoindentation creep behavior is highly correlated with local microstructure features, and the mapping approach is feasible for evaluating creep-resistance of locally diverse microstructures under extremely high-stress conditions.
•High-throughput nanoindentation tests are conducted on an interstitial high-entropy alloy with diverse microstructure features.•Nanoindentation mapping including nanohardness (H), strain rate (ε˙) and stress exponent (n) uncovers the individual creep behavior of each microstructural variant.•Correlated the value of H, ε˙ and n with local microstructures of all indent positions, the creep mechanisms originating from each assembly of microstructural variants are elucidated.•Dominant creep mechanisms of all indents convert from diffusion-mediated model to dislocation-controlled one with the increase of n value.•This work provides an approach to efficiently probe the creep behavior of materials with diverse microstructures at the nanoscale.</description><subject>Cold rolling</subject><subject>Contact melting</subject><subject>Contours</subject><subject>Creep mechanism</subject><subject>Creep strength</subject><subject>Diffusion</subject><subject>Dislocation density</subject><subject>Diverse microstructures</subject><subject>High entropy alloys</subject><subject>High-entropy alloy</subject><subject>Mapping</subject><subject>Mechanical systems</subject><subject>Melting points</subject><subject>Microstructure</subject><subject>Nanohardness</subject><subject>Nanoindentation</subject><subject>Plastic deformation</subject><subject>Room temperature</subject><subject>Strain rate</subject><issn>0921-5093</issn><issn>1873-4936</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNp9kM1KxDAUhYMoOI6-gKuA6475aSctuJHBPxh0o-uQpjfTlE5Sk3RgXsDntkNdu7pwOOfcez-EbilZUULX991qH0GtGGFsRXNeleUZWtBS8Cyv-PocLUjFaFaQil-iqxg7QgjNSbFAP-_KeesacEkl6x3WAWDANbTqYH3A3uDGHiBEwHurg48pjDqNASK2Dis8BMgmTVkHzaSkyZlssqrHrd212VQb_HDEqu_9EdfHWU1t8OOuHcaE92oYrNtdowuj-gg3f3OJvp6fPjev2fbj5W3zuM00Z2XKarpWlVhDyQXUeW2YMaIpKOQir3NBlC7yWhNBODBloKGCN5WpOVMlFVAIw5fobu4dgv8eISbZ-TG4aaVkoqgEJZxXk4vNrtPDMYCRQ7B7FY6SEnniLTt54i1PvOXMewo9zCGY7j9YCDJqC05DYwPoJBtv_4v_AgWXjWA</recordid><startdate>20221020</startdate><enddate>20221020</enddate><creator>Fan, Qimeng</creator><creator>Gan, Kefu</creator><creator>Yan, Dingshun</creator><creator>Li, Zhiming</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><orcidid>https://orcid.org/0000-0002-8170-5621</orcidid><orcidid>https://orcid.org/0000-0001-5680-2094</orcidid></search><sort><creationdate>20221020</creationdate><title>Nanoindentation creep behavior of diverse microstructures in a pre-strained interstitial high-entropy alloy by high-throughput mapping</title><author>Fan, Qimeng ; Gan, Kefu ; Yan, Dingshun ; Li, Zhiming</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c328t-b16a976e837eb4bf2ff7d51e474b470ac54bc0703e2afed173d9fb32a817e57f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Cold rolling</topic><topic>Contact melting</topic><topic>Contours</topic><topic>Creep mechanism</topic><topic>Creep strength</topic><topic>Diffusion</topic><topic>Dislocation density</topic><topic>Diverse microstructures</topic><topic>High entropy alloys</topic><topic>High-entropy alloy</topic><topic>Mapping</topic><topic>Mechanical systems</topic><topic>Melting points</topic><topic>Microstructure</topic><topic>Nanohardness</topic><topic>Nanoindentation</topic><topic>Plastic deformation</topic><topic>Room temperature</topic><topic>Strain rate</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Fan, Qimeng</creatorcontrib><creatorcontrib>Gan, Kefu</creatorcontrib><creatorcontrib>Yan, Dingshun</creatorcontrib><creatorcontrib>Li, Zhiming</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>Fan, Qimeng</au><au>Gan, Kefu</au><au>Yan, Dingshun</au><au>Li, Zhiming</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Nanoindentation creep behavior of diverse microstructures in a pre-strained interstitial high-entropy alloy by high-throughput mapping</atitle><jtitle>Materials science & engineering. A, Structural materials : properties, microstructure and processing</jtitle><date>2022-10-20</date><risdate>2022</risdate><volume>856</volume><spage>143988</spage><pages>143988-</pages><artnum>143988</artnum><issn>0921-5093</issn><eissn>1873-4936</eissn><abstract>Time-dependent plastic deformation, also known as creep, can occur in high-melting-point materials at room temperature when subjected to submicron plastic contact (e.g., components in micro-electronic mechanical systems) due to the extremely high stress conditions. Previous investigations of creep behavior at submicron scale mainly focus on uniform microstructures, whereas recently developed high-performance structural materials usually show complex microstructural heterogeneities. Here, we demonstrate a high-throughput nanoindentation approach to unveil the creep behavior of locally diverse microstructures, via a case study on an interstitial high-entropy alloy (iHEA). The prototype iHEA specimen was firstly pre-strained by severe cold-rolling to achieve diverse microstructure features including dense dislocations, nanotwins and nanograins. Nanoindentation mapping with 144 indents is conducted to collect creep data from all types of diverse microstructures, followed by systematical calculations based on power-law analysis. Then intuitive contour maps of nanohardness (H), strain rate (ε˙) and stress exponent (n) are attained. The individual creep mechanism of each microstructure variant is evaluated by correlating local microstructure features with corresponding creep responses from these contour maps. With the increase of n value for different sample regions, the ε˙ value inversely reduces and the corresponding dominant creep mechanism gradually converts from diffusion-mediated mode to dislocation-controlled one. The presence of nanograins and nanotwins significantly hinders dislocation interactions and promotes stress-induced diffusion. This work verifies that nanoindentation creep behavior is highly correlated with local microstructure features, and the mapping approach is feasible for evaluating creep-resistance of locally diverse microstructures under extremely high-stress conditions.
•High-throughput nanoindentation tests are conducted on an interstitial high-entropy alloy with diverse microstructure features.•Nanoindentation mapping including nanohardness (H), strain rate (ε˙) and stress exponent (n) uncovers the individual creep behavior of each microstructural variant.•Correlated the value of H, ε˙ and n with local microstructures of all indent positions, the creep mechanisms originating from each assembly of microstructural variants are elucidated.•Dominant creep mechanisms of all indents convert from diffusion-mediated model to dislocation-controlled one with the increase of n value.•This work provides an approach to efficiently probe the creep behavior of materials with diverse microstructures at the nanoscale.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.msea.2022.143988</doi><orcidid>https://orcid.org/0000-0002-8170-5621</orcidid><orcidid>https://orcid.org/0000-0001-5680-2094</orcidid></addata></record> |
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subjects | Cold rolling Contact melting Contours Creep mechanism Creep strength Diffusion Dislocation density Diverse microstructures High entropy alloys High-entropy alloy Mapping Mechanical systems Melting points Microstructure Nanohardness Nanoindentation Plastic deformation Room temperature Strain rate |
title | Nanoindentation creep behavior of diverse microstructures in a pre-strained interstitial high-entropy alloy by high-throughput mapping |
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