...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Microstructural and mechanical study in the plastic zone of ARMCO iron processed by ECAP
【24h】

Microstructural and mechanical study in the plastic zone of ARMCO iron processed by ECAP

机译：ECAP处理的ARMCO铁塑性区的组织和力学研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Plastic deformation of ARMCO iron processed by ECAP up to a maximum equivalent strain of sixteen (i.e., 1, 4, 8, and 16 ECAP passes) following route Bc was investigated by analyzing its microstructure and the stress-strain curves obtained after tensile tests at different levels of deformation. Three values of deformation (two in the plastic region taking into account the modified Crussard-Jaoul analysis and one after failure) were considered. Fractions of LAGB and HAGB, grain size and grain aspect ratio were calculated and compared for the different ECAP passes and tensile deformation levels. The dislocation density evolution calculated by the Bergstrbm model for both the tensile curves and the ECAP curve showed a higher increase in the amount of dislocations during the initial stages of deformation than at higher values of deformation due to higher probabilities of dislocations annihilation. The strain hardening exponents calculated via the Bergstroem model for each ECAP pass shows that there is a continuous decrease in the strain hardening capacity until the eighth pass where a small increase with a subsequent stabilization was found. The dislocation densities calculated by the Estrin model presented a good correlation with values reported in bibliography for iron especially with those calculated by X-ray diffraction. This latter model predicted well the strain hardening evolution for stages Ⅲ, Ⅳ and Ⅴ for ARMCO iron processed by ECAP, where the main increments in hardening for stages Ⅳ and Ⅴ were coming from the cell interiors.
机译：通过分析其微观结构和在15℃拉伸试验后获得的应力-应变曲线，研究了经过ECAP处理的ARMCO铁的塑性变形，直至路径Bc达到最大等效应变16次（即1、4、8和16次ECAP通过）。不同程度的变形。考虑了三个变形值（考虑到改进的Crussard-Jaoul分析，塑性变形中的两个值，失效后一个）。计算并比较了不同ECAP焊缝和拉伸变形水平下LAGB和HAGB的分数，晶粒尺寸和晶粒长宽比。通过Bergstrbm模型计算的拉伸曲线和ECAP曲线的位错密度演化结果表明，由于位错an灭的可能性更高，因此在变形初始阶段，位错量的增加要比在变形值较高时高。通过Bergstroem模型为每个ECAP通道计算的应变硬化指数表明，应变硬化能力持续下降，直到第八次通过为止，发现出现小幅增加并随之稳定。 Estrin模型计算出的位错密度与参考书目中铁的值（尤其是X射线衍射计算出的值）具有良好的相关性。后一个模型很好地预测了用ECAP处理的ARMCO铁在Ⅲ，Ⅳ和Ⅴ阶段的应变硬化演变，其中Ⅳ和Ⅴ阶段的主要硬化增量来自于细胞内部。

著录项

  • 来源
    《Materials Science and Engineering》 |2017年第14期|24-36|共13页
  • 作者

    Jairo Alberto Munoz; Oscar Fabian Higuera; Jose Maria Cabrera;

  • 作者单位

    Department of Materials Science and Metallurgical Engineering, Untversidad Politecnica de Catalunya, EEBE-c/Eduard Maristany 10-14, 08019 Barcelona, Spain;

    Department of Materials Science and Metallurgical Engineering, Untversidad Politecnica de Catalunya, EEBE-c/Eduard Maristany 10-14, 08019 Barcelona, Spain,Faculty of Engineering Mechanical Engineering Program, Untversidad del Atlantico, Barranquilla, Colombia;

    Department of Materials Science and Metallurgical Engineering, Untversidad Politecnica de Catalunya, EEBE-c/Eduard Maristany 10-14, 08019 Barcelona, Spain;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Grain size; Cell interiors; Cell walls; Dislocations; Strain hardening; Traction test;

    机译：晶粒大小;单元内部;细胞壁;脱位;应变硬化;牵引力测试;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号