• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Quantum Beam Science >Multiple Wavelengths Texture Measurement Using Angle Dispersive Neutron Diffraction at WOMBAT
【24h】

Multiple Wavelengths Texture Measurement Using Angle Dispersive Neutron Diffraction at WOMBAT

机译：使用角度分散中子衍射在袋熊的多波长纹理测量

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

摘要

In contrast to conventional angle dispersive neutron diffractometers with a single-tube detector or a small-size linear position-sensitive detector, the WOMBAT diffractometer of the Australian Nuclear Science and Technology Organisation (ANSTO) is equipped with a large-area curved position-sensitive detector, spanning 120° for the scattering angle 2θ and 15° for the azimuth η, respectively. Here, WOMBAT was employed in establishing a texture measurement environment for complex textured samples, through measuring neutron diffractograms at two selected wavelengths on a typical reference sample of martensite–austenite multilayered steel sheet. All neutron patterns were simultaneously Rietveld analyzed using the software, Materials Analysis Using Diffraction (MAUD). The shorter wavelength (λ1 = 1.54 ?, k1 = 4.08 ??1) enabled collecting the martensite reflections α-110, α-200, α-211, α-220, α-310, and α-222, as well as the austenite peaks γ-111, γ-200, γ-220, γ-311, γ-222, and γ-331 simultaneously, by pre-setting the detector range to 2Θ = 30~150°. The longer wavelength (λ2 = 2.41 ?, k2 = 2.61 ??1) enabled separating the overlapping strong martensite α-110 and austenite γ-111 Laue–Bragg interferences more reliably. Moreover, the detector panel division along the vertical direction has a good stereographic coverage in the azimuthal angle η,. Such a combination of multiple-wavelength neutron diffraction combined with simultaneous Rietveld texture analysis was confirmed as being very valuable for realizing high precision measurements for complex textured samples at an orientation distribution graticule of 5°, and in a much shorter beam time than the conventional angle dispersive method.
机译：与具有单管探测器或小型线性位置敏感探测器的传统角度分散中子衍射计相比，澳大利亚核科技组织（ANSTO）的Wombat衍射仪配备了大面积弯曲位置敏感检测器分别用于散射角度2θ的120°，分别用于方位角η的散射角2θ和15°。这里，通过在Martensite-奥氏体多层钢板的典型参考样品上测量两个选定波长的中子衍射图来建立复杂纹理样本的纹理测量环境。所有中子模式都同时使用衍射（Maud）进行了使用该软件进行的材料分析。更短的波长（λ1= 1.54？，k1 = 4.08 ?? 1），使得Martensite反射α-110，α-200，α-211，α-220，α-310和α-222以及通过将检测器范围预设为2θ= 30〜150°，同时α-111，γ-200，γ-220，γ-311，γ-222和γ-331同时达到γ-111，γ-200，γ-222，γ-331，γ-331。更长的波长（λ2= 2.41？，K2 = 2.61 ?? 1）使重叠的强马氏体α-110和奥氏体γ-111 Laue-Bragg干扰能够更可靠地分离。此外，沿垂直方向的检测器面板分割在方位角η中具有良好的立体覆盖。这种多波长中子衍射与同时RIETVELD纹理分析组合的组合被证实是非常有价值的，对于在5°的取向分布晶格处实现复杂纹理样本的高精度测量，以及比传统角度更短的光束时间分散方法。

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