...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Refractory Metals & Hard Materials >Plastic deformation of recrystallized tungsten-potassium wires: Constitutive deformation law in the temperature range 22-600 degrees C
【24h】

Plastic deformation of recrystallized tungsten-potassium wires: Constitutive deformation law in the temperature range 22-600 degrees C

机译：重结晶钨钾线的塑性变形：温度范围内的构成变形法22-600℃

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

Recent efforts dedicated to the mitigation of tungsten (W) brittleness have demonstrated that tungsten fiber reinforced composites acquire extrinsic toughening even at room temperature, which is due to the outstanding strength of W wires. However, high temperature operation/fabrication of the fiber-reinforced composite might result in the degradation of the mechanical properties of W wires. To address this, we investigate mechanical and microstructural properties of potassium-doped tungsten wires, being heat treated at 2300 degrees C and tested in temperature range 22-600 degrees C. Based on the microscopic analysis, the engineering deformation curves are converted into actual stress-strain dataset, accounting for the local necking. The analysis demonstrates that local strain in the necking region can reach up to 50% and the total elongation monotonically increases with temperature, while the ultimate tensile strength goes down. Preliminary transmission electron microscopy analysis using FIB-cut lamella from the necking region revealed the presence of curved dislocation lines in the sample tested at 300 degrees C, proving that plastic deformation occurred by dislocation glide.
机译：最近致力于减轻钨（W）脆性的努力表明，钨纤维增强复合材料即使在室温下也能获得外在增韧，这是由于W线的突出强度。然而，纤维增强复合材料的高温操作/制造可能导致W线的机械性能的降低。为了解决这一点，我们研究了掺杂钨钨丝的机械和微观结构性能，在2300℃下热处理，并在22-600℃的温度范围内进行测试。基于微观分析，工程变形曲线转换为实际应力-Strain数据集，占当地颈缩。该分析表明，颈部区域中的局部应变可以达到高达50％，并且总伸长率单调随温度而增加，而最终的拉伸强度下降。使用来自颈颈区域的Fib-Cut薄片的初步透射电子显微镜分析显示在300摄氏度下测试的样品中存在弯曲位错线，证明塑性变形通过位错滑动发生。

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