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一、引言 为研究微量氧原子对高纯铌室温应变时效拉伸性能影响的微观机制,采用1000kV高压电子显微镜观察不同氧含量下样品中的微观组织,分析其位错组态、密度及性质的变化。本文仅介绍含氧量为0.002～0.003％变形量为3.5％的高纯铌样品中位错性质和位错密度的确定方法。并介绍了实验技术、理论计算及误差讨论。本方法也适用于其它样品。
I. INTRODUCTION In order to study the microscopic mechanism of the effect of trace oxygen atoms on the strain aging tensile properties of high purity niobium at room temperature, the microstructures of samples with different oxygen contents were observed with 1000kV high-pressure electron microscope. The dislocation configuration, density and properties Variety. This article describes only the determination of dislocation properties and dislocation densities in high purity niobium samples with 0.002-0.003% oxygen content and 3.5% deformation. The experimental technique, theoretical calculation and error discussion are also introduced. The method is also applicable to other samples.