Materials Technology, Bechtel Marine Propulsion Corporation, West Mifflin, PA 15221, USA.
Microsc Microanal. 2011 Jun;17(3):341-9. doi: 10.1017/S1431927611000079. Epub 2011 Apr 8.
Electron backscatter diffraction (EBSD) was employed to analyze the microstructure and texture of four different Alloy 82H gas tungsten arc welds that previously underwent static and dynamic modulus testing. The Young's moduli were shown to differ among the various welds, but also within each weld, dependent upon the direction measured. These differences were attributed to anisotropy of the crystallographic textures, which were described using inverse pole figures with respect to each of the weld's three orthogonal axes. The Young's modulus demonstrated a strong correlation with the texture, consistent with single crystal experiments. Sample directions containing a large population of {100} orientations had the lowest Young's modulus, while those with {111} grains possessed the highest. Microstructures with {110} textures were closer to the average modulus value of 207 GPa (30.0 Msi). X-ray diffraction texture measurements on four samples were used to verify the EBSD results.
电子背散射衍射（EBSD）被用于分析先前经过静态和动态模量测试的四种不同的 82H 合金钨极气体电弧焊缝的微观结构和织构。结果表明，杨氏模量在不同的焊缝之间存在差异，而且在每个焊缝内，也取决于测量的方向。这些差异归因于晶体织构的各向异性，这可以通过相对于每个焊缝的三个正交轴的反极图来描述。杨氏模量与织构之间存在很强的相关性，这与单晶实验一致。包含大量{100}取向的样品方向具有最低的杨氏模量，而具有{111}晶粒的方向具有最高的杨氏模量。具有{110}织构的微观结构更接近 207 GPa（30.0 Msi）的平均模量值。对四个样品的 X 射线衍射织构测量用于验证 EBSD 结果。
