Nonlinear ultrasonic response of voids and Cu precipitates in body-centered cubic Fe
Interpreting nonlinear ultrasonic signals detected in a nondestructive evaluation of radiation damage requires the knowledge of the correlation between defects and nonlinearity. In this work, molecular dynamics simulations are performed to study the effect of distributed vacancies, voids, Cu atoms,...
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creator | Setyawan, Wahyu Henager, Charles H. Hu, Shenyang |
description | Interpreting nonlinear ultrasonic signals detected in a nondestructive evaluation of radiation damage requires the knowledge of the correlation between defects and nonlinearity. In this work, molecular dynamics simulations are performed to study the effect of distributed vacancies, voids, Cu atoms, and Cu precipitates on the nonlinear ultrasonic response in body-centered cubic (bcc) Fe. The nonlinearity parameter calculated from the second harmonic amplitude in the perfect lattice is 2.73. Vacancies are found to increase the nonlinearity. However, clusters of vacancies in the form of spherical voids show an opposite effect. This finding can be used to conveniently distinguish vacancies from voids in the material. Unlike vacancies, individual Cu atoms decrease the nonlinearity. Clustering of Cu atoms into Cu precipitates further decreases the nonlinearity. Interestingly, precipitates with a diameter of 2 nm and larger exhibit a similar effect despite their different structure and coherency with the Fe matrix. |
doi_str_mv | 10.1063/1.5029368 |
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In this work, molecular dynamics simulations are performed to study the effect of distributed vacancies, voids, Cu atoms, and Cu precipitates on the nonlinear ultrasonic response in body-centered cubic (bcc) Fe. The nonlinearity parameter calculated from the second harmonic amplitude in the perfect lattice is 2.73. Vacancies are found to increase the nonlinearity. However, clusters of vacancies in the form of spherical voids show an opposite effect. This finding can be used to conveniently distinguish vacancies from voids in the material. Unlike vacancies, individual Cu atoms decrease the nonlinearity. Clustering of Cu atoms into Cu precipitates further decreases the nonlinearity. Interestingly, precipitates with a diameter of 2 nm and larger exhibit a similar effect despite their different structure and coherency with the Fe matrix.</description><identifier>ISSN: 0021-8979</identifier><identifier>EISSN: 1089-7550</identifier><identifier>DOI: 10.1063/1.5029368</identifier><identifier>CODEN: JAPIAU</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Applied physics ; Chemical precipitation ; Clustering ; Computer simulation ; Damage assessment ; Damage detection ; Lattice vacancies ; Molecular dynamics ; Nondestructive testing ; Nonlinear response ; Nonlinearity ; Precipitates ; Radiation damage ; Ultrasonic testing ; Voids</subject><ispartof>Journal of applied physics, 2018-07, Vol.124 (3)</ispartof><rights>Author(s)</rights><rights>2018 Author(s). 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In this work, molecular dynamics simulations are performed to study the effect of distributed vacancies, voids, Cu atoms, and Cu precipitates on the nonlinear ultrasonic response in body-centered cubic (bcc) Fe. The nonlinearity parameter calculated from the second harmonic amplitude in the perfect lattice is 2.73. Vacancies are found to increase the nonlinearity. However, clusters of vacancies in the form of spherical voids show an opposite effect. This finding can be used to conveniently distinguish vacancies from voids in the material. Unlike vacancies, individual Cu atoms decrease the nonlinearity. Clustering of Cu atoms into Cu precipitates further decreases the nonlinearity. Interestingly, precipitates with a diameter of 2 nm and larger exhibit a similar effect despite their different structure and coherency with the Fe matrix.</description><subject>Applied physics</subject><subject>Chemical precipitation</subject><subject>Clustering</subject><subject>Computer simulation</subject><subject>Damage assessment</subject><subject>Damage detection</subject><subject>Lattice vacancies</subject><subject>Molecular dynamics</subject><subject>Nondestructive testing</subject><subject>Nonlinear response</subject><subject>Nonlinearity</subject><subject>Precipitates</subject><subject>Radiation damage</subject><subject>Ultrasonic testing</subject><subject>Voids</subject><issn>0021-8979</issn><issn>1089-7550</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp90MtKAzEUBuAgCtbqwjcIulKYmjOZ61KKVaHopq5DJjnBlJqMSabQt3dKRReCq7P5zu0n5BLYDFjF72BWsrzlVXNEJsCaNqvLkh2TCWM5ZE1bt6fkLMY1YwANbydk9eLdxjqUgQ6bFGT0zioaMPbeRaTe0K23OlLpNJ0PtA-obG-TTBipdbTzepcpdAkDaqqGbmxe4Dk5MXIT8eK7Tsnb4mE1f8qWr4_P8_tlpoqcpQw6aDWirGXJK2VUW4EpoGkqqXiVF7wxUud5jZoVOedQmxJg5ONX2HV1p_mUXB3m-pisiMomVO_KO4cqCSgqVrb1iK4PqA_-c8CYxNoPwY13iZw1YzwAUIzq5qBU8DEGNKIP9kOGnQAm9skKEN_Jjvb2YPcbZbLe_eCtD79Q9Nr8h_9O_gLjSYZn</recordid><startdate>20180721</startdate><enddate>20180721</enddate><creator>Setyawan, Wahyu</creator><creator>Henager, Charles H.</creator><creator>Hu, Shenyang</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0001-5192-8085</orcidid><orcidid>https://orcid.org/0000000151928085</orcidid></search><sort><creationdate>20180721</creationdate><title>Nonlinear ultrasonic response of voids and Cu precipitates in body-centered cubic Fe</title><author>Setyawan, Wahyu ; Henager, Charles H. ; Hu, Shenyang</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c420t-1b19deea7a536cfc961f41886ac362438fad227ed0423317f511eea089ebb7bd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Applied physics</topic><topic>Chemical precipitation</topic><topic>Clustering</topic><topic>Computer simulation</topic><topic>Damage assessment</topic><topic>Damage detection</topic><topic>Lattice vacancies</topic><topic>Molecular dynamics</topic><topic>Nondestructive testing</topic><topic>Nonlinear response</topic><topic>Nonlinearity</topic><topic>Precipitates</topic><topic>Radiation damage</topic><topic>Ultrasonic testing</topic><topic>Voids</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Setyawan, Wahyu</creatorcontrib><creatorcontrib>Henager, Charles H.</creatorcontrib><creatorcontrib>Hu, Shenyang</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>Journal of applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Setyawan, Wahyu</au><au>Henager, Charles H.</au><au>Hu, Shenyang</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Nonlinear ultrasonic response of voids and Cu precipitates in body-centered cubic Fe</atitle><jtitle>Journal of applied physics</jtitle><date>2018-07-21</date><risdate>2018</risdate><volume>124</volume><issue>3</issue><issn>0021-8979</issn><eissn>1089-7550</eissn><coden>JAPIAU</coden><abstract>Interpreting nonlinear ultrasonic signals detected in a nondestructive evaluation of radiation damage requires the knowledge of the correlation between defects and nonlinearity. In this work, molecular dynamics simulations are performed to study the effect of distributed vacancies, voids, Cu atoms, and Cu precipitates on the nonlinear ultrasonic response in body-centered cubic (bcc) Fe. The nonlinearity parameter calculated from the second harmonic amplitude in the perfect lattice is 2.73. Vacancies are found to increase the nonlinearity. However, clusters of vacancies in the form of spherical voids show an opposite effect. This finding can be used to conveniently distinguish vacancies from voids in the material. Unlike vacancies, individual Cu atoms decrease the nonlinearity. Clustering of Cu atoms into Cu precipitates further decreases the nonlinearity. 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subjects | Applied physics Chemical precipitation Clustering Computer simulation Damage assessment Damage detection Lattice vacancies Molecular dynamics Nondestructive testing Nonlinear response Nonlinearity Precipitates Radiation damage Ultrasonic testing Voids |
title | Nonlinear ultrasonic response of voids and Cu precipitates in body-centered cubic Fe |
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