...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Enabling microstructural changes of FCC/BCC alloys in 2D dislocation dynamics
【24h】

Enabling microstructural changes of FCC/BCC alloys in 2D dislocation dynamics

机译：在二维位错动力学中实现FCC / BCC合金的微观结构变化

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

Dimension reduction procedure is the recipe to represent defects in two dimensional dislocation dynamics according to the changes in the geometrical properties of the defects triggered by different conditions such as radiation, high temperature, or pressure. In the present study, this procedure is extended to incorporate further features related to the presence of defects with a special focus on face-centered cubic/body-centered cubic alloys used for diverse engineering purposes. In order to reflect the microstructural state of the alloy on the computational cell of two dimensional dislocation dynamics, the distribution of the multi-type defects over slip lines is implemented by using corresponding strength and line spacing for each type of defect. Additionally, a simple recursive incremental relation is set to count the loop accumulation on the precipitates. In the case of continuous resistance against the motion of edge dislocations on the slip lines, an expression of friction is introduced to see its contribution on the yield strength. Each new property is applied independently on a different material by using experimental information about defect properties and grain sizes under the condition of plain strain deformation: both constant and dynamically increasing obstacle strength for precipitate coarsening in prime-aged and heat-treated copper-chromium-zirconium, internal friction in tantalum-2.5tungsten, and mixed hardening due to the presence of precipitates and prismatic loops in irradiated oxide dispersion strengthened EUROFER with 0.3% yttria.
机译：降维程序是根据由不同条件（例如辐射，高温或压力）触发的缺陷的几何特性变化来表示二维位错动力学中的缺陷的方法。在本研究中，此程序已扩展为包含与缺陷的存在相关的其他功能，特别关注用于多种工程目的的面心立方/体心立方合金。为了在二维位错动力学的计算单元上反映合金的微观结构状态，通过为每种类型的缺陷使用相应的强度和线间距来实现滑移线上的多种类型缺陷的分布。此外，设置了一个简单的递归增量关系来计算沉淀物上的环堆积。在连续抵抗滑移线上边缘错位运动的情况下，引入摩擦表达式以查看其对屈服强度的贡献。在平坦应变变形的条件下，通过使用有关缺陷性质和晶粒尺寸的实验信息，将每种新性质独立地应用于不同的材料：在经过时效和热处理的铜铬合金中，析出物粗化的恒定且动态增加的障碍强度锆，钽-2.5钨中的内摩擦以及由于在辐照氧化物分散体中存在沉淀物和棱形环而导致的混合硬化增强了含0.3％氧化钇的EUROFER。

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