The mechanism of radiation-induced segregation in ferritic–martensitic alloys
The mechanism of radiation-induced segregation in Fe–Cr alloys was modeled using the inverse Kirkendall mechanism and compared to experimental measurements over a range of temperatures, bulk Cr compositions, and irradiation dose. The model showed that over a large temperature range chromium was enri...
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| Veröffentlicht in: | Acta materialia 2014-02, Vol.65, p.42-55 |
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| creator | Wharry, Janelle P. Was, Gary S. |
| description | The mechanism of radiation-induced segregation in Fe–Cr alloys was modeled using the inverse Kirkendall mechanism and compared to experimental measurements over a range of temperatures, bulk Cr compositions, and irradiation dose. The model showed that over a large temperature range chromium was enriched at sinks by interstitial migration, and at very high temperatures it was depleted by diffusing opposite to the vacancy flux. Experimental results and model predictions were in good qualitative and quantitative agreement with regard to the temperature dependence of segregation and the crossover from Cr enrichment to Cr depletion. The inverse Kirkendall mechanism was also in agreement with experimental findings that observed a decreasing amount of Cr enrichment with increasing bulk Cr composition. The effects of solute drag were modeled within the inverse Kirkendall framework, but were unable to account for either the crossover from Cr enrichment to Cr depletion or the magnitudes of segregation measured in experiments. |
| doi_str_mv | 10.1016/j.actamat.2013.09.049 |
| format | Article |
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(ORNL), Oak Ridge, TN (United States) ; Center for Nanophase Materials Sciences (CNMS)</creatorcontrib><description>The mechanism of radiation-induced segregation in Fe–Cr alloys was modeled using the inverse Kirkendall mechanism and compared to experimental measurements over a range of temperatures, bulk Cr compositions, and irradiation dose. The model showed that over a large temperature range chromium was enriched at sinks by interstitial migration, and at very high temperatures it was depleted by diffusing opposite to the vacancy flux. Experimental results and model predictions were in good qualitative and quantitative agreement with regard to the temperature dependence of segregation and the crossover from Cr enrichment to Cr depletion. The inverse Kirkendall mechanism was also in agreement with experimental findings that observed a decreasing amount of Cr enrichment with increasing bulk Cr composition. The effects of solute drag were modeled within the inverse Kirkendall framework, but were unable to account for either the crossover from Cr enrichment to Cr depletion or the magnitudes of segregation measured in experiments.</description><identifier>ISSN: 1359-6454</identifier><identifier>EISSN: 1873-2453</identifier><identifier>DOI: 10.1016/j.actamat.2013.09.049</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Applied sciences ; Chromium ; Crossovers ; Depletion ; Enrichment ; Exact sciences and technology ; Ferritic–martensitic ; Intermetallic compounds ; Inverse ; Mathematical models ; Metals. 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(ORNL), Oak Ridge, TN (United States)</creatorcontrib><creatorcontrib>Center for Nanophase Materials Sciences (CNMS)</creatorcontrib><title>The mechanism of radiation-induced segregation in ferritic–martensitic alloys</title><title>Acta materialia</title><description>The mechanism of radiation-induced segregation in Fe–Cr alloys was modeled using the inverse Kirkendall mechanism and compared to experimental measurements over a range of temperatures, bulk Cr compositions, and irradiation dose. The model showed that over a large temperature range chromium was enriched at sinks by interstitial migration, and at very high temperatures it was depleted by diffusing opposite to the vacancy flux. Experimental results and model predictions were in good qualitative and quantitative agreement with regard to the temperature dependence of segregation and the crossover from Cr enrichment to Cr depletion. The inverse Kirkendall mechanism was also in agreement with experimental findings that observed a decreasing amount of Cr enrichment with increasing bulk Cr composition. The effects of solute drag were modeled within the inverse Kirkendall framework, but were unable to account for either the crossover from Cr enrichment to Cr depletion or the magnitudes of segregation measured in experiments.</description><subject>Applied sciences</subject><subject>Chromium</subject><subject>Crossovers</subject><subject>Depletion</subject><subject>Enrichment</subject><subject>Exact sciences and technology</subject><subject>Ferritic–martensitic</subject><subject>Intermetallic compounds</subject><subject>Inverse</subject><subject>Mathematical models</subject><subject>Metals. Metallurgy</subject><subject>Proton irradiation</subject><subject>Radiation effects</subject><subject>Radiation-induced segregation</subject><subject>Segregations</subject><issn>1359-6454</issn><issn>1873-2453</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqFkM9KxDAQh4soqKuPIBRB8NKaNEmbnETEf7DgRc8hphPN0iZrkhW8-Q6-oU9iurt49ZRk-Cbzm68oTjCqMcLtxaJWOqlRpbpBmNRI1IiKneIA845UDWVkN98JE1VLGd0vDmNcIISbjqKD4vHpDcoR9JtyNo6lN2VQvVXJeldZ16809GWE1wCv61ppXWkgBJus_vn6HlVI4OL0KtUw-M94VOwZNUQ43p6z4vn25un6vpo_3j1cX80rTYRIFesb_NJzrjC0LcHIMAG9gI4xwbhuG2Z6zKmmL4ygVnMwoA0iLeNYKKy6jsyK082_PiYro7Yp76C9c6CTxJiKrmMZOt9Ay-DfVxCTHG3UMAzKgV9FiTlHiBDaooyyDaqDjzGAkctg83qfEiM5WZYLubUsJ8sSCZkt576z7QgVtRpMUE7b-Nfc8EY0dJ33csNBlvJhIUyZwWW9NkyRe2__mfQL0iqWUg</recordid><startdate>20140215</startdate><enddate>20140215</enddate><creator>Wharry, Janelle P.</creator><creator>Was, Gary S.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>OTOTI</scope></search><sort><creationdate>20140215</creationdate><title>The mechanism of radiation-induced segregation in ferritic–martensitic alloys</title><author>Wharry, Janelle P. ; Was, Gary S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c399t-5d21bd88a1e66310f59ed9e755958c625fd184c4b5306c8efecf0365819a1a773</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Applied sciences</topic><topic>Chromium</topic><topic>Crossovers</topic><topic>Depletion</topic><topic>Enrichment</topic><topic>Exact sciences and technology</topic><topic>Ferritic–martensitic</topic><topic>Intermetallic compounds</topic><topic>Inverse</topic><topic>Mathematical models</topic><topic>Metals. Metallurgy</topic><topic>Proton irradiation</topic><topic>Radiation effects</topic><topic>Radiation-induced segregation</topic><topic>Segregations</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wharry, Janelle P.</creatorcontrib><creatorcontrib>Was, Gary S.</creatorcontrib><creatorcontrib>Oak Ridge National Lab. 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(ORNL), Oak Ridge, TN (United States)</aucorp><aucorp>Center for Nanophase Materials Sciences (CNMS)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The mechanism of radiation-induced segregation in ferritic–martensitic alloys</atitle><jtitle>Acta materialia</jtitle><date>2014-02-15</date><risdate>2014</risdate><volume>65</volume><spage>42</spage><epage>55</epage><pages>42-55</pages><issn>1359-6454</issn><eissn>1873-2453</eissn><abstract>The mechanism of radiation-induced segregation in Fe–Cr alloys was modeled using the inverse Kirkendall mechanism and compared to experimental measurements over a range of temperatures, bulk Cr compositions, and irradiation dose. The model showed that over a large temperature range chromium was enriched at sinks by interstitial migration, and at very high temperatures it was depleted by diffusing opposite to the vacancy flux. Experimental results and model predictions were in good qualitative and quantitative agreement with regard to the temperature dependence of segregation and the crossover from Cr enrichment to Cr depletion. The inverse Kirkendall mechanism was also in agreement with experimental findings that observed a decreasing amount of Cr enrichment with increasing bulk Cr composition. The effects of solute drag were modeled within the inverse Kirkendall framework, but were unable to account for either the crossover from Cr enrichment to Cr depletion or the magnitudes of segregation measured in experiments.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.actamat.2013.09.049</doi><tpages>14</tpages></addata></record> |
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| ispartof | Acta materialia, 2014-02, Vol.65, p.42-55 |
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| language | eng |
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| subjects | Applied sciences Chromium Crossovers Depletion Enrichment Exact sciences and technology Ferritic–martensitic Intermetallic compounds Inverse Mathematical models Metals. Metallurgy Proton irradiation Radiation effects Radiation-induced segregation Segregations |
| title | The mechanism of radiation-induced segregation in ferritic–martensitic alloys |
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