...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Progress in Materials Science >Ultrafine grained metals and metal matrix nanocomposites fabricated by powder processing and thermomechanical powder consolidation
【24h】

Ultrafine grained metals and metal matrix nanocomposites fabricated by powder processing and thermomechanical powder consolidation

机译：超细颗粒金属和金属基质纳米复合材料，由粉末加工制造和热机械粉末固结

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Ultrafine grained metals and metal matrix nanocomposites with enhanced strength and good tensile ductility for structural applications have been successfully fabricated by processing and thermomechanically consolidating powders and, in some cases, post-consolidation heat and thermomechanical treatments. This paper provides an overview of the substantial amount of research work mainly published by the author?s research groups rather than a comprehensive review of the vast amount of very active research work published in this area. The microstructures and tensile properties of the samples fabricated and the correlations between them strongly suggest that the synergistic effects of grain boundary strengthening and intragranular ceramic (and other hard) nanoparticles are highly desirable for significantly enhancing the tensile yield strength and maintaining generally good tensile ductility. The extra boundaries between hard regions and soft regions introduced by heterogeneous microstructure can further enhance the strength of the material without sacrificing tensile ductility by inducing back stress in the soft regions. However, these boundaries also induce forward stress in the hard regions which has a weakening effect on them and needs to be managed by dispersing nanoparticles in the hard regions or other means.
机译：通过加工和热机械整合粉末成功地制造具有增强的强度和良好拉伸延展性的超细粒状金属和金属基质纳米复合材料，并在某些情况下，在某些情况下，整合热和热机械处理。本文概述了作者研究小组主要发布的大量研究工作，而不是全面审查这一领域发布的大量积极的研究工作。制造的样品的微观结构和拉伸性能强烈表明，晶粒边界强化和腔内陶瓷（和其他硬）纳米颗粒的协同效应是非常理想的，用于显着增强拉伸屈服强度并保持大致良好的拉伸延性。通过异质微观结构引入的硬区域和软区域之间的额外边界可以通过在柔软区域中诱导背部应力来进一步增强材料的强度而不牺牲拉伸延展性。然而，这些边界也在造成对它们的效果弱化并且需要通过分散在硬区域或其他方法中的纳米颗粒的情况下进行管理的。

著录项

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