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首页> 外文期刊>ISIJ international >Microstructural and Texture Development during Multi-Pass Hot Deformation of a Stabilized High-Chromium Ferritic Stainless Steel
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Microstructural and Texture Development during Multi-Pass Hot Deformation of a Stabilized High-Chromium Ferritic Stainless Steel

机译：稳定的高铬铁素体不锈钢多道次热变形过程中的显微组织和织构发展

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摘要

With the ultimate target of improving the deep drawability of a dual-stabilized 21%Cr ferritic stainless steel, the evolution of the flow stress, microstructure, texture, dislocation structures and precipitation during multi-pass hot deformation were studied. Plane strain compression in three passes with 0.4 - 0.5 pass strains and 20 s inter-pass times was employed together with scanning electron microscopy combined with electron backscatter diffraction (SEM-EBSD) and transmission electron microscopy (TEM). The temperature of the final pass was varied between 1 223 K and 923 K and the final cooling took place either by water quenching to room temperature or water cooling to 923 K followed by cooling at 0.33 K/s to room temperature. At 1 223 K, static recrystallization was almost complete during the 20 s inter-pass times and this randomized the texture. When the deformation temperature was lowered to 1 073 K or 923 K, in-grain shear bands were formed in the grains belonging to the γ fibre. The deformation temperature of the third pass had only a minor effect on the deformation texture intensity maxima. The final dislocation structure was not changed by the cooling rate from 923 K, but slow cooling enabled precipitation to occur. The results indicate that although the deformation conditions affect the deformed microstructures and dislocation structures, the effect of the deformation temperature on the texture was insignificant.
机译：以提高双稳定度21％Cr铁素体不锈钢的深冲性为最终目标，研究了多道次热变形过程中流变应力，组织，织构，位错结构和析出的演变。将平面应变压缩分为三道，分别具有0.4-0.5的通过应变和20 s的通过时间，并将扫描电子显微镜与电子反向散射衍射（SEM-EBSD）和透射电子显微镜（TEM）相结合。最终通过的温度在1223 K和923 K之间变化，并且最终冷却通过水淬至室温或水冷至923 K，然后以0.33 K / s冷却至室温来进行。在1223 K时，在20 s的通过时间内几乎完成了静态再结晶，这使织构随机化。当变形温度降低到1073 K或923 K时，在属于γ纤维的晶粒中会形成晶粒内剪切带。第三遍的变形温度仅对变形织构强度最大值具有较小的影响。最终的位错结构并未因923 K的冷却速率而改变，但缓慢的冷却使发生了沉淀。结果表明，尽管变形条件会影响变形后的微观结构和位错结构，但变形温度对织构的影响不明显。

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  • 来源
    《ISIJ international》 |2014年第6期|1406-1415|共10页
  • 作者

    Saara MEHTONEN; Eric PALMIERE; Devesh MISRA; Pentti KARJALAINEN; David PORTER;

  • 作者单位

    Centre for Advanced Steels Research, University of Oulu, P.O. Box 4200, 90014 University of Oulu, Finland;

    Department of Materials Science and Engineering, The University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield, S1 3JD, UK;

    Center for Structural and Functional Materials, University of Louisiana at Lafayette, P.O. Box 44130, Lafayette, LA 70504-4130 USA;

    Centre for Advanced Steels Research, University of Oulu, P.O. Box 4200, 90014 University of Oulu, Finland;

    Centre for Advanced Steels Research, University of Oulu, P.O. Box 4200, 90014 University of Oulu, Finland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    hot deformation; deformation temperature; cooling rate; recrystallization; texture; dislocation structure;

    机译：热变形变形温度冷却速度重结晶质地;位错结构;

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