{"id":2362,"date":"2025-09-26T11:22:30","date_gmt":"2025-09-26T04:22:30","guid":{"rendered":"https:\/\/www.its.ac.id\/publikasi\/?p=2362"},"modified":"2025-09-26T11:22:30","modified_gmt":"2025-09-26T04:22:30","slug":"oxide-dispersion-strengthened-steels-precipitation-kinetics-and-matrix-phase-transformation-2","status":"publish","type":"post","link":"https:\/\/www.its.ac.id\/publikasi\/en\/2025\/09\/26\/oxide-dispersion-strengthened-steels-precipitation-kinetics-and-matrix-phase-transformation-2\/","title":{"rendered":"Oxide Dispersion Strengthened Steels: Precipitation Kinetics and Matrix Phase Transformation"},"content":{"rendered":"<div id=\"authorString\"><em>Hyginus Chidiebere Onyekachi Unegbu, Danjuma S. Yawas, B Dan Asabe, A A Alabi<\/em><\/div>\n<p>&nbsp;<\/p>\n<div id=\"articleAbstract\">\n<h4>Abstract<\/h4>\n<div>\n<p>This study presents a comprehensive investigation of the microstructural features, precipitation kinetics, phase transformations, and mechanical properties of Oxide Dispersion Strengthened (ODS) steels, with a focus on the impact of Y\u2082O\u2083 particle dispersion. Detailed microstructural analysis using Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) revealed a fine and uniform distribution of Y\u2082O\u2083 particles, averaging 10-15 nm in size, which contributed to significant grain refinement to 5-7 \u00b5m. The precipitation kinetics, examined through Differential Scanning Calorimetry (DSC) and dilatometry, showed a diffusion-controlled mechanism with an activation energy of 230 kJ\/mol. The dispersed oxide particles delayed the austenite-to-martensite transformation, stabilizing the austenitic phase at higher temperatures, as confirmed by in-situ High-Temperature X-ray Diffraction (HT-XRD). Mechanical tests demonstrated a hardness of 320 HV and a tensile strength of 600 MPa, with a total elongation of 12%. These results highlight the effectiveness of oxide dispersion in enhancing the mechanical strength and thermal stability of ODS steels. The findings suggest that ODS steels are highly suitable for high-performance applications, particularly in environments such as nuclear reactors and aerospace, where high temperature, radiation resistance, and mechanical durability are critical. Future work should explore the long-term stability of these materials under operational conditions to further optimize their performance.<\/p>\n<\/div>\n<\/div>\n<div id=\"articleSubject\">\n<h4>Keywords<\/h4>\n<div>ODS steels, Y\u2082O\u2083 particles, microstructure, precipitation kinetics, phase transformation, thermal stability, mechanical properties<\/div>\n<\/div>\n<div id=\"articleFullText\">\n<h4>Full Text:<\/h4>\n<p><a class=\"file\" href=\"https:\/\/iptek.its.ac.id\/index.php\/jmes\/article\/view\/21705\" target=\"_parent\">PDF<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Hyginus Chidiebere Onyekachi Unegbu, Danjuma S. Yawas, B Dan Asabe, A A Alabi &nbsp; Abstract This study presents a comprehensive investigation of the microstructural features, precipitation kinetics, phase transformations, and mechanical properties of Oxide Dispersion Strengthened (ODS) steels, with a focus on the impact of Y\u2082O\u2083 particle dispersion. Detailed microstructural analysis using Transmission Electron Microscopy [&hellip;]<\/p>\n","protected":false},"author":250,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[240],"tags":[],"class_list":["post-2362","post","type-post","status-publish","format-standard","hentry","category-jmes-journal"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Oxide Dispersion Strengthened Steels: Precipitation Kinetics and Matrix Phase Transformation - IJC ( ITS Journal Center )<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.its.ac.id\/publikasi\/en\/2025\/09\/26\/oxide-dispersion-strengthened-steels-precipitation-kinetics-and-matrix-phase-transformation-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Oxide Dispersion Strengthened Steels: Precipitation Kinetics and Matrix Phase Transformation - IJC ( ITS Journal Center )\" \/>\n<meta property=\"og:description\" content=\"Hyginus Chidiebere Onyekachi Unegbu, Danjuma S. Yawas, B Dan Asabe, A A Alabi &nbsp; Abstract This study presents a comprehensive investigation of the microstructural features, precipitation kinetics, phase transformations, and mechanical properties of Oxide Dispersion Strengthened (ODS) steels, with a focus on the impact of Y\u2082O\u2083 particle dispersion. 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