{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T10:55:16Z","timestamp":1790592916678,"version":"4.1.0"},"reference-count":41,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T00:00:00Z","timestamp":1790553600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T00:00:00Z","timestamp":1790553600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100004070","name":"Khalifa University of Science, Technology and Research","doi-asserted-by":"publisher","award":["KU\u2010UAEU\u20102023\u20100012"],"award-info":[{"award-number":["KU\u2010UAEU\u20102023\u20100012"]}],"id":[{"id":"10.13039\/501100004070","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004070","name":"Khalifa University of Science, Technology and Research","doi-asserted-by":"publisher","award":["RIG\u20102024\u2010002"],"award-info":[{"award-number":["RIG\u20102024\u2010002"]}],"id":[{"id":"10.13039\/501100004070","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["analyticalsciencejournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Microscopy Res &amp;amp; Technique"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    The local elastic response of the Al matrix surrounding T\n                    <jats:sub>1<\/jats:sub>\n                    precipitates and Al\n                    <jats:sub>3<\/jats:sub>\n                    Zr dispersoids in a T8\u2010treated AA2195 Al\u2013Li\u2013Cu alloy was investigated using a correlative approach combining advanced scanning transmission electron microscopy, low\u2010loss electron energy\u2010loss spectroscopy, image simulation, and first\u2010principles calculations. Aberration\u2010corrected HAADF\u2013STEM and STEM\u2010EDS confirmed the presence of plate\u2010like T\n                    <jats:sub>1<\/jats:sub>\n                    precipitates and spheroidal Al\n                    <jats:sub>3<\/jats:sub>\n                    Zr dispersoids, with Cu enrichment in the T\n                    <jats:sub>1<\/jats:sub>\n                    phase and Zr enrichment in the dispersoids. Low\u2010loss STEM\u2010EELS spectrum imaging was used to probe the local valence\u2010electron response by analyzing the first bulk plasmon peak of the Al\u2010rich matrix. Quantitative fitting of the plasmon peak revealed spatial variations in peak amplitude, full width at half maximum, and energy position near the precipitate\u2013matrix interfaces, indicating local changes in electron density, bonding environment, and interfacial strain. Using an empirical plasmon energy\u2010elastic modulus relationship, local effective Young's modulus values of approximately 70.4\u2009GPa for the Al matrix, 69.3\u2009GPa for the T\n                    <jats:sub>1<\/jats:sub>\n                    \u2010adjacent Al\u2010rich matrix\/interface region, and 72.1\u2009GPa for the Al\n                    <jats:sub>3<\/jats:sub>\n                    Zr\u2010adjacent Al\u2010rich matrix\/interface region were obtained. These values reveal nanoscale elastic heterogeneity associated with the distinct precipitate\u2010matrix interfacial environments. QSTEM\u2010based multislice HAADF\u2013STEM simulations reproduced the experimental T\n                    <jats:sub>1<\/jats:sub>\n                    contrast and validated the Cu\u2010rich layered atomic arrangement of the precipitate. Density functional theory calculations were further performed on idealized Al\/T\n                    <jats:sub>1<\/jats:sub>\n                    and Al\/Al\n                    <jats:sub>3<\/jats:sub>\n                    Zr interface supercells. Strain\u2010energy analysis yielded effective directional Young's moduli of approximately 78\u2009GPa and 73\u2009GPa, respectively, for the selected interface configurations. The combined experimental and computational results show that the local elastic response of AA2195 is governed by precipitate chemistry, interfacial coherency, lattice mismatch, and electronic\u2010structure modification. This work establishes low\u2010loss STEM\u2010EELS plasmon mapping, supported by atomistic simulations and DFT calculations, as a powerful framework for linking nanoscale structure, chemistry, and elasticity in precipitation\u2010strengthened Al\u2013Li\u2013Cu alloys.\n                  <\/jats:p>","DOI":"10.1002\/jemt.70185","type":"journal-article","created":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T09:55:50Z","timestamp":1790589350000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Correlative\n                    <scp>STEM<\/scp>\n                    \u2010\n                    <scp>EELS<\/scp>\n                    and First\u2010Principles Probing of Nanoscale Elastic Heterogeneity Around T\n                    <sub>1<\/sub>\n                    and Al\n                    <sub>3<\/sub>\n                    Zr Phases in\n                    <scp>AA2195<\/scp>\n                    Al\u2013Li\u2013Cu Alloy"],"prefix":"10.1002","author":[{"given":"Mohamed E.","family":"Daoud","sequence":"first","affiliation":[{"name":"Department of Physics Khalifa University  Abu Dhabi UAE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1127-3069","authenticated-orcid":false,"given":"Naga Venkateswara Rao","family":"Nulakani","sequence":"additional","affiliation":[{"name":"Department of Physics Khalifa University  Abu Dhabi UAE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Muna S.","family":"Khushaim","sequence":"additional","affiliation":[{"name":"Department of Physics, Faculty of Science Taibah University  Al\u2010Madina Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-7929-7043","authenticated-orcid":false,"given":"Mohamed Ben","family":"Hassine","sequence":"additional","affiliation":[{"name":"Imaging and Characterization Core Lab King Abdullah University of Science and Technology (KAUST)  Thuwal Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5195-2533","authenticated-orcid":false,"given":"Sharmarke","family":"Mohamed","sequence":"additional","affiliation":[{"name":"Department of Chemistry Khalifa University  Abu Dhabi UAE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3813-631X","authenticated-orcid":false,"given":"Mohamad Akbar","family":"Ali","sequence":"additional","affiliation":[{"name":"Department of Chemistry Khalifa University  Abu Dhabi UAE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2336-2859","authenticated-orcid":false,"given":"Dalaver H.","family":"Anjum","sequence":"additional","affiliation":[{"name":"Department of Physics Khalifa University  Abu Dhabi UAE"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,9,28]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1142\/S0217979218503009"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.matchar.2024.113712"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.91.135501"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.3390\/ma16247610"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1093\/mam\/ozae116"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.actamat.2010.09.044"},{"key":"e_1_2_10_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.vacuum.2022.111333"},{"key":"e_1_2_10_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ultramic.2021.113220"},{"key":"e_1_2_10_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.matchar.2021.111549"},{"issue":"4","key":"e_1_2_10_11_1","first-page":"339","article-title":"Application of Valence Electron Energy\u2010Loss Spectroscopy and Plasmon Energy Mapping for Determining Material Properties at the Nanoscale","volume":"53","author":"Howe J. 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