{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T21:07:31Z","timestamp":1792789651915,"version":"4.5.0"},"reference-count":75,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2025,1,24]],"date-time":"2025-01-24T00:00:00Z","timestamp":1737676800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"US Department of Energy\u2019s Fossil Energy Program, Division of Crosscutting R&amp;D and Systems Integration","award":["4000174979"],"award-info":[{"award-number":["4000174979"]}]},{"name":"US Department of Energy\u2019s Fossil Energy Program, Division of Crosscutting R&amp;D and Systems Integration","award":["BES-ERCAP0027822"],"award-info":[{"award-number":["BES-ERCAP0027822"]}]},{"name":"US Department of Energy\u2019s Fossil Energy Program, Division of Crosscutting R&amp;D and Systems Integration","award":["DMR100029"],"award-info":[{"award-number":["DMR100029"]}]},{"name":"NSF\u2019s ACCESS program","award":["4000174979"],"award-info":[{"award-number":["4000174979"]}]},{"name":"NSF\u2019s ACCESS program","award":["BES-ERCAP0027822"],"award-info":[{"award-number":["BES-ERCAP0027822"]}]},{"name":"NSF\u2019s ACCESS program","award":["DMR100029"],"award-info":[{"award-number":["DMR100029"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Oxide phases such as \u03b1-Fe2O3 (hematite) and \u03b1-Al2O3 (corundum) are highly insoluble in water; however, subcritical crack growth has been observed in humidity nonetheless. Chemically induced bond breaking at the crack tip appears unlikely due to sterically hindered molecular transport. The molecular mechanics of a crack in corundum with a reactive force field reveal minimal lattice trapping, leading to bond breaking before sufficient space opens for water transport. To address this, we model a pre-built blunt crack with space for H2O molecule adsorption at the tip and show that it reduces fracture toughness by lowering the critical J-integral. Then, we explore stress-enhanced dissolution to understand the mechanism of crack tip blunting in the oxide\/water system. Density functional theory combined with metadynamics was employed to describe atomic dissolution from flat hematite and corundum surfaces in pure water. Strain accelerates dissolution, stabilizing intermediate states with broken bonds before full atom detachment, while the free energy profile of unstrained surfaces is almost monotonic. The atomistic calculations provided input for a kinetic model, predicting the shape evolution of a blunt crack tip, which displays three distinct regimes: (i) dissolution primarily away from the tip, (ii) enhanced blunting near but not at the apex, and (iii) sharpening near the apex. The transition between regimes occurs at a low strain, highlighting the critical role of water in the subcritical crack growth of oxide scales, with dissolution as the fundamental microscopic mechanism behind this process.<\/jats:p>","DOI":"10.3390\/ma18030538","type":"journal-article","created":{"date-parts":[[2025,1,24]],"date-time":"2025-01-24T09:40:39Z","timestamp":1737711639000},"page":"538","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Ab Initio Molecular Dynamics Insights into Stress Corrosion Cracking and Dissolution of Metal Oxides"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5928-0885","authenticated-orcid":false,"given":"Levi C.","family":"Felix","sequence":"first","affiliation":[{"name":"Department of Materials Science & NanoEngineering, Rice University, Houston, TX 77005, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qin-Kun","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Materials Science & NanoEngineering, Rice University, Houston, TX 77005, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Evgeni S.","family":"Penev","sequence":"additional","affiliation":[{"name":"Department of Materials Science & NanoEngineering, Rice University, Houston, TX 77005, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Boris I.","family":"Yakobson","sequence":"additional","affiliation":[{"name":"Department of Materials Science & NanoEngineering, Rice University, Houston, TX 77005, USA"},{"name":"Department of Chemistry, Rice University, Houston, TX 77005, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,1,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"102814","DOI":"10.1016\/j.ijggc.2019.102814","article-title":"A comprehensive review of metal corrosion in a supercritical CO2 environment","volume":"90","author":"Cui","year":"2019","journal-title":"Int. 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