{"title":"奥氏体化和冷却速率对近共析钢珠光体形态和动力学的影响：实验-模拟相结合的方法","authors":"Ipsa Tripathy, Manila Mallik, Shiv Brat Singh","doi":"10.1007/s11669-025-01206-2","DOIUrl":null,"url":null,"abstract":"<div><p>The effect of austenitization temperature (<i>T</i><sub><i>A</i></sub>) and cooling rate (<i>CR</i>) on microstructure and transformation kinetics of near eutectoid steel after continuous cooling transformation have been studied by dilatometry. The samples were austenitized at 800, 900, and 1000 °C for 20 min, and then cooled to room temperature at <i>CR</i> of 0.5, 1, and 2 °C/s. Increasing <i>CR</i> resulted in the lowering of interlamellar spacing (<i>S</i>), producing finer pearlite. Similarly, at a constant <i>CR</i>, <i>S</i> decreased with higher <i>T</i><sub><i>A</i></sub>. The nature of pearlite nucleation indicating site saturation was predicted through kinetic analysis, where the Kamamoto equation was applied to the dilatometric data of the fully pearlitic steels. The DICTRA simulations using the MobFe2 database confirmed the increased time for completion of transformation and decreased <i>S</i> with increased <i>T</i><sub><i>A</i></sub> at a <i>CR</i> of 2 °C/s, aligning well with the experimental data. Both experimental and simulated results also showed consistent trends in time for completion of transformation and <i>S</i> values across constant <i>T</i><sub><i>A</i></sub> of 1000 °C with varying <i>CR</i> conditions.</p></div>","PeriodicalId":657,"journal":{"name":"Journal of Phase Equilibria and Diffusion","volume":"46 4","pages":"396 - 413"},"PeriodicalIF":1.7000,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of Austenitization and Cooling Rate on Pearlite Morphology and Kinetics of Near Eutectoid Steel: A Combined Experimental–Simulation Approach\",\"authors\":\"Ipsa Tripathy, Manila Mallik, Shiv Brat Singh\",\"doi\":\"10.1007/s11669-025-01206-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The effect of austenitization temperature (<i>T</i><sub><i>A</i></sub>) and cooling rate (<i>CR</i>) on microstructure and transformation kinetics of near eutectoid steel after continuous cooling transformation have been studied by dilatometry. The samples were austenitized at 800, 900, and 1000 °C for 20 min, and then cooled to room temperature at <i>CR</i> of 0.5, 1, and 2 °C/s. Increasing <i>CR</i> resulted in the lowering of interlamellar spacing (<i>S</i>), producing finer pearlite. Similarly, at a constant <i>CR</i>, <i>S</i> decreased with higher <i>T</i><sub><i>A</i></sub>. The nature of pearlite nucleation indicating site saturation was predicted through kinetic analysis, where the Kamamoto equation was applied to the dilatometric data of the fully pearlitic steels. The DICTRA simulations using the MobFe2 database confirmed the increased time for completion of transformation and decreased <i>S</i> with increased <i>T</i><sub><i>A</i></sub> at a <i>CR</i> of 2 °C/s, aligning well with the experimental data. Both experimental and simulated results also showed consistent trends in time for completion of transformation and <i>S</i> values across constant <i>T</i><sub><i>A</i></sub> of 1000 °C with varying <i>CR</i> conditions.</p></div>\",\"PeriodicalId\":657,\"journal\":{\"name\":\"Journal of Phase Equilibria and Diffusion\",\"volume\":\"46 4\",\"pages\":\"396 - 413\"},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2025-08-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Phase Equilibria and Diffusion\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11669-025-01206-2\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Phase Equilibria and Diffusion","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11669-025-01206-2","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Effect of Austenitization and Cooling Rate on Pearlite Morphology and Kinetics of Near Eutectoid Steel: A Combined Experimental–Simulation Approach
The effect of austenitization temperature (TA) and cooling rate (CR) on microstructure and transformation kinetics of near eutectoid steel after continuous cooling transformation have been studied by dilatometry. The samples were austenitized at 800, 900, and 1000 °C for 20 min, and then cooled to room temperature at CR of 0.5, 1, and 2 °C/s. Increasing CR resulted in the lowering of interlamellar spacing (S), producing finer pearlite. Similarly, at a constant CR, S decreased with higher TA. The nature of pearlite nucleation indicating site saturation was predicted through kinetic analysis, where the Kamamoto equation was applied to the dilatometric data of the fully pearlitic steels. The DICTRA simulations using the MobFe2 database confirmed the increased time for completion of transformation and decreased S with increased TA at a CR of 2 °C/s, aligning well with the experimental data. Both experimental and simulated results also showed consistent trends in time for completion of transformation and S values across constant TA of 1000 °C with varying CR conditions.
期刊介绍：
The most trusted journal for phase equilibria and thermodynamic research, ASM International''s Journal of Phase Equilibria and Diffusion features critical phase diagram evaluations on scientifically and industrially important alloy systems, authored by international experts.
The Journal of Phase Equilibria and Diffusion is critically reviewed and contains basic and applied research results, a survey of current literature and other pertinent articles. The journal covers the significance of diagrams as well as new research techniques, equipment, data evaluation, nomenclature, presentation and other aspects of phase diagram preparation and use.
Content includes information on phenomena such as kinetic control of equilibrium, coherency effects, impurity effects, and thermodynamic and crystallographic characteristics. The journal updates systems previously published in the Bulletin of Alloy Phase Diagrams as new data are discovered.
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