Effect of Austenitization and Cooling Rate on Pearlite Morphology and Kinetics of Near Eutectoid Steel: A Combined Experimental–Simulation Approach

IF 1.7 4区材料科学 Q4 CHEMISTRY, PHYSICAL

Journal of Phase Equilibria and Diffusion Pub Date : 2025-08-09 DOI:10.1007/s11669-025-01206-2

Ipsa Tripathy, Manila Mallik, Shiv Brat Singh

{"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>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.</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}

引用次数: 0

Abstract

The effect of austenitization temperature (T_A) 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 T_A. 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 T_A 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 T_A of 1000 °C with varying CR conditions.

Abstract Image

查看原文本刊更多论文

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

采用膨胀法研究了奥氏体化温度（TA）和冷却速率（CR）对近共析钢连续冷却转变后显微组织和转变动力学的影响。样品分别在800、900和1000℃下奥氏体化20 min，然后在0.5、1和2℃/s的CR下冷却至室温。CR的增加导致层间间距(S)减小，珠光体更细。同样，在一定CR下，S随TA的增大而减小。通过动力学分析预测了珠光体成核的性质，并将Kamamoto方程应用于完全珠光体钢的膨胀数据。利用MobFe2数据库进行的DICTRA模拟证实，在温度为2°C/ S时，随着TA的增加，完成转化的时间增加，S降低，与实验数据吻合良好。实验和模拟结果也显示了在不同CR条件下，在1000°C恒定TA下完成转化的时间和S值的一致趋势。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Phase Equilibria and Diffusion 工程技术-材料科学：综合

CiteScore

2.50

自引率

7.10%

发文量

审稿时长

1 months

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.