{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/25215"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/25215","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"An ultrasonic study of impurity-interstitial complexes in electron irradiated Al-Si and Al-Ag","abstract":"Ultrasonic attenuation and velocity measurements were performed to probe the structure and annealing behavior of solute self interstitial complexes in electron irradiated (T < 70 K) dilute Al-Ag and Al-Si alloys. In both alloy systems, a similar attenuation peak structure is observed. This peak structure strongly suggests that in both alloys, a defect species of <110>- monoclinic defect symmetry is present. The annealing, during Stage II, of this defect species follows a first order rate -equation which has a prefactor proportional to the solute concentration. The diaelastic effect associated with this defect is found to be comparable in magnitude and anisotropy to that attributed to <100>-self interstitial dumbbells in pure aluminum. A <110>-monoclinic mixed dumbbell model is examined as a possible explanation for these results.","abstract_html":"Ultrasonic attenuation and velocity measurements were performed to probe the structure and annealing behavior of solute self interstitial complexes in electron irradiated (T &lt; 70 K) dilute Al-Ag and Al-Si alloys. In both alloy systems, a similar attenuation peak structure is observed. This peak structure strongly suggests that in both alloys, a defect species of &lt;110&gt;- monoclinic defect symmetry is present. The annealing, during Stage II, of this defect species follows a first order rate -equation which has a prefactor proportional to the solute concentration. The diaelastic effect associated with this defect is found to be comparable in magnitude and anisotropy to that attributed to &lt;100&gt;-self interstitial dumbbells in pure aluminum. A &lt;110&gt;-monoclinic mixed dumbbell model is examined as a possible explanation for these results.","abstract_has_math":false,"creators":["Johnson, Eric Carl"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Granato, A.V."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-06-02T15:32:19Z","date_published":"2011-06-02T15:32:19Z","updated_at":"2026-07-22T22:25:24Z","subjects":["ultrasonic attenuation","intersitial complexes","electron irradiated","Aluminum Alloys"],"languages":["en"],"rights":["1987 Eric Carl Johnson"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["1411768"],"render_values":[{"text":"1411768","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/25215","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Granato, A.V."]},{"key":"dc:creator","label":"Author","values":["Johnson, Eric Carl"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-06-02T15:32:19Z","10000-01-01","1987"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation / Thesis","text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["ultrasonic attenuation","intersitial complexes","electron irradiated","Aluminum Alloys"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["1987 Eric Carl Johnson"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["1411768","http://hdl.handle.net/2142/25215"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Ultrasonic attenuation and velocity measurements were performed to probe the structure and annealing behavior of solute self interstitial complexes in electron irradiated (T < 70 K) dilute Al-Ag and Al-Si alloys. In both alloy systems, a similar attenuation peak structure is observed. This peak structure strongly suggests that in both alloys, a defect species of <110>- monoclinic defect symmetry is present. The annealing, during Stage II, of this defect species follows a first order rate -equation which has a prefactor proportional to the solute concentration. The diaelastic effect associated with this defect is found to be comparable in magnitude and anisotropy to that attributed to <100>-self interstitial dumbbells in pure aluminum. A <110>-monoclinic mixed dumbbell model is examined as a possible explanation for these results.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-02T15:32:19Z No. of bitstreams: 1 1987_johnson,eric.pdf: 7563709 bytes, checksum: 94345e153d77dfec3edd11f158b01c9f (MD5)","Made available in DSpace on 2011-06-02T15:32:19Z (GMT). No. of bitstreams: 1 1987_johnson,eric.pdf: 7563709 bytes, checksum: 94345e153d77dfec3edd11f158b01c9f (MD5) Previous issue date: 1987","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-06-02T15:32:19Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:12:56-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"]},{"key":"dc:title","label":"Title","values":["An ultrasonic study of impurity-interstitial complexes in electron irradiated Al-Si and Al-Ag"]}]}],"canonical_facts":{"dc:contributor":["Granato, A.V."],"dc:creator":["Johnson, Eric Carl"],"dc:date":["2011-06-02T15:32:19Z","10000-01-01","1987"],"dc:description":["Ultrasonic attenuation and velocity measurements were performed to probe the structure and annealing behavior of solute self interstitial complexes in electron irradiated (T < 70 K) dilute Al-Ag and Al-Si alloys. In both alloy systems, a similar attenuation peak structure is observed. This peak structure strongly suggests that in both alloys, a defect species of <110>- monoclinic defect symmetry is present. The annealing, during Stage II, of this defect species follows a first order rate -equation which has a prefactor proportional to the solute concentration. The diaelastic effect associated with this defect is found to be comparable in magnitude and anisotropy to that attributed to <100>-self interstitial dumbbells in pure aluminum. A <110>-monoclinic mixed dumbbell model is examined as a possible explanation for these results.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-02T15:32:19Z No. of bitstreams: 1 1987_johnson,eric.pdf: 7563709 bytes, checksum: 94345e153d77dfec3edd11f158b01c9f (MD5)","Made available in DSpace on 2011-06-02T15:32:19Z (GMT). No. of bitstreams: 1 1987_johnson,eric.pdf: 7563709 bytes, checksum: 94345e153d77dfec3edd11f158b01c9f (MD5) Previous issue date: 1987","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-06-02T15:32:19Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:12:56-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"],"dc:identifier":["1411768","http://hdl.handle.net/2142/25215"],"dc:language":["en"],"dc:rights":["1987 Eric Carl Johnson"],"dc:subject":["ultrasonic attenuation","intersitial complexes","electron irradiated","Aluminum Alloys"],"dc:title":["An ultrasonic study of impurity-interstitial complexes in electron irradiated Al-Si and Al-Ag"],"dc:type":["Dissertation / Thesis","text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."]},"updated_at":"2026-07-22T22:25:24Z"}