...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Science >Processing by equal-channel angular pressing: Applications to grain boundary engineering
【24h】

Processing by equal-channel angular pressing: Applications to grain boundary engineering

机译：等通道角压加工：在晶界工程中的应用

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

Equal-channel angular pressing (ECAP) is a processing technique in which a sample is pressed through a die constrained within a channel so that an intense strain is imposed without incurring any change in the cross-sectional dimensions of the sample. This procedure may be used to achieve considerable grain refinement in pure metals and metallic alloys with as-pressed grain sizes lying typically within the submicrometer range. Careful experiments reveal only a minor change in the grain size with increasing numbers of passes through an ECAP die but there is a significant change in the distribution of grain boundary misorientations as a function of the total imposed strain. In practice, the microstructure evolves with increasing strain from an array of grains where the boundaries are predominantly in low-angle misorientations to an array of grains where a high fraction (typically ≥60%) is in high-angle misorientations. This evolution has a significant effect on the characteristics of the as-pressed materials including the high temperature mechanical properties and the measured rates of diffusion. In addition, the evolution provides an opportunity to use Grain Boundary Engineering in order to optimize the behavior of the material.
机译：等通道角压制（ECAP）是一种处理技术，其中，将样品通过约束在通道内的模具进行压制，从而施加强烈的应变而不会导致样品横截面尺寸的任何变化。此过程可用于在纯金属和金属合金中实现相当大的晶粒细化，压制后的晶粒尺寸通常在亚微米范围内。仔细的实验​​表明，随着通过ECAP模头次数的增加，晶粒尺寸只有很小的变化，但是晶界取向错误的分布却随着总应变的增加而发生了显着变化。在实践中，微观结构随着应变的增加而演化，从一系列晶格（其中边界主要在低角度取向）到一系列晶粒（高比例（通常≥60％））在高角度取向。这种演变对所压制材料的特性具有重要影响，包括高温机械性能和测得的扩散速率。此外，这种改进还提供了使用晶粒边界工程的机会，以优化材料的性能。

著录项

  • 来源
    《Journal of Materials Science》 |2005年第4期|909-917|共9页
  • 作者

    Minoru Furukawa; Zenji Horita; Terence G. Langdon;

  • 作者单位

    Department of Technology Fukuoka University of Education;

    Department of Materials Science and Engineering Faculty of Engineering Kyushu University;

    Department of Technology Fukuoka University of EducationDepartments of Aerospace Mechanical Engineering and Materials Science University of Southern California;

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

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