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相关概念视频

Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
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Sample Preparation by 3D-Correlative Focused Ion Beam Milling for High-Resolution Cryo-Electron Tomography
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三维柱状微结构表示使用2D电子反射散射衍射数据用于增材制造的海恩斯® 282®

Liene Zaikovska1, Magnus Ekh2, Johan Moverare1,3

  • 1Department of Engineering Science, University West, SE-461 86 Trollhättan, Sweden.

Materials (Basel, Switzerland)
|April 13, 2024
PubMed
概括

本研究介绍了一种方法,通过粉床融合电子束 (PBF-EB) 增材制造制造的海恩斯282合金的3D微观结构. 虚拟模型准确地预测方向弹性特性,这对于先进的材料设计至关重要.

关键词:
欧洲银行股票监督管理局 (EBSDD) 的工作.在PBF-EB中,PBF-EB是在RVE RVE.不同类型的异型性异型性计算同质化的一致化.一个多晶的多晶体.

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Three-Dimensional Particle Shape Analysis Using X-ray Computed Tomography: Experimental Procedure and Analysis Algorithms for Metal Powders
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科学领域:

  • 材料科学 材料科学 材料科学
  • 机械工程 机械工程
  • 计算机建模 计算建模

背景情况:

  • 粉床融合电子束 (PBF-EB) 是一种先进的增材制造技术.
  • 海恩斯®282®合金表现出复杂的微观结构和异构的机械性能.
  • 准确地描述微观结构对于预测材料性能至关重要.

研究的目的:

  • 开发一种方法来创建PBF-EB海恩斯®282®合金的3D微结构模型.
  • 为了验证这些模型在预测方向弹性特性方面的准确性.
  • 要突出谷物形态和晶体结构表示的重要性.

主要方法:

  • 使用2D电子反射衍射 (EBSD) 数据.
  • 使用代表体积元素 (RVE) 方法生成3D微结构表示.
  • 通过晶体弹性有限元 (CEFE) 分析进行计算同质化.

主要成果:

  • 从2D EBSD数据成功生成3D微结构模型.
  • 通过CEFE计算同质化验证弹性特性.
  • 与实验结果相比,虚拟模型预测了方向弹性特性,最大误差为5%左右.

结论:

  • 精确表示谷物形态和结晶学纹理至关重要.
  • 开发的方法显示了增材制造材料的高预测潜力.
  • 确定了EBSD区域选择和处理微观结构异常的挑战.