金属、合金、复合材料和陶瓷  

EBSD技术已成为表征大多数金属、合金、复合材料和陶瓷微观组织的主要工具,这也可能是EBSD应用的最大领域。其应用范围非常广泛,从轧制金属板中晶粒尺寸和织构的常规(以及现在的快速)测量,到与裂纹扩展相关的位错密度的详细分析。这些材料中,有许多比较容易使用EBSD分析,但诸如TKD或高分辨率花样的相关性分析等高级工具,正越来越多地应用,以提高我们对这些材料的理解。这些应用的关键在于,这些材料的物理性能与微观组织参数之间的密切关系。这些微观组织参数可以通过EBSD技术轻松表征。以下的列表给出了此领域中的一些典型应用,尽管完整的应用范围要大得多:

  • 常规的晶粒尺寸和织构表征
  • 鉴定与裂纹形成相关的晶界析出相 
  • 变形材料的滑移和孪生机制分析
  • 马氏体钢和钛合金的母相晶粒分析
  • 多相钢(包括马氏体和贝氏体)的相分析
  • 详细的失效和裂纹扩展分析
  • 研究材料对应变和温度的反应的原位分析
超级双相不锈钢的相分布图,展示了应力腐蚀开裂的源头
超级双相不锈钢的相分布图,在矿物油中处理以模拟海水环境,以研究金属间化合物相对应力腐蚀开裂的影响。图中黄色是σ相,蓝色是γ相而红色是α相。箭头标识了某些裂纹,显示了裂纹在σ相中产生,并沿着γ相晶粒扩展,被α相和γ相阻断。

Application Notes

Evaluating Dislocation Densities and Slip Systems in deformed Titanium using EBSD

Discover how EBSD can be used to characterise the dislocation type and densities in deformed metals and alloys, enabling a better understanding of the material’s physical properties. Here we compare 2 deformed Ti alloys, showing how advanced dislocation analysis using AZtecCrystal highlights the operation of different slip systems during deformation.

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Evaluating parent grain reconstruction in Titanium using high temperature in-situ EBSD

Learn how parent grain microstructures can be reconstructed from low temperature EBSD analyses using AZtecCrystal. Here, the reconstruction results for a Titanium sample are tested using in-situ EBSD analyses of beta-Ti collected at >900 °C using a new type of high temperature phosphor screen. The results indicate an excellent agreement between the as-measured and reconstructed beta-Ti microstructures.

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Rapid Microstructural Characterisation of Rolled Ni Sheets using Symmetry S2

The extreme analysis speed achievable with the Symmetry S2 EBSD detector enables effective characterisation of samples at speeds over 4500 indexed patterns per second. Here a deformed and heat-treated Ni sheet is analysed using EBSD in just a few minutes, providing all key microstructural measurements.

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AZtec Grain Analysis

The grain size is an important parameter of a material, it will strongly affect mechanical and physical properties. Understanding how grain size is influenced through the processing of materials, can assist in engineering materials with optimised properties.

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AZtecSynergy and BLG CrossCourt 3 EBSD Characterisation of a Crept Nickel Alloy

Microanalysis is a powerful tool in understanding potential failure mechanisms and potential life time of many materials. In this example, the microstructure and damage distribution following creep deformation of a nickel superalloy is studied using EBSD and EDS

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Improving the spatial resolution of EBSD using transmission Kikuchi diffraction in the SEM

This application note illustrates the application of TKD to a nanostructured nickel sample and a highly deformed stainless steel, both of which were impossible to characterise using conventional EBSD.

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EBSD Microstructural Characterisation of an Alumina Insulator

Careful sample preparation enables good quality EBSD data to be collected from an alumina insulator. This data provides valuable information on the microstructure of the material – in particular grain size and distribution, texture and porosity.

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Rapid Characterisation of Steel and Ni

The Symmetry detector is ideal for the routine characterisation of metal samples at speeds up to 3000 pps. Here it is used to characterise a deformed Ni superalloy and a large area across a welded duplex steel.

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AZtec Synergy - Phase identification in a high temperature Steel

This technical note illustrates the capability of Oxford Instruments AZtecSynergy microanalysis system using the Tru-I® indexing engine to perform Phase Identification.

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Rapid Classification of Advanced High Strength Steels using EBSD

Here the high analysis speed of the Symmetry S2 EBSD detector is combined with the advanced data processing capability of AZtecCrystal to characterise the complex phase distribution in 2 quenching and partitioning (Q&P) processed high strength steels.

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Webinars

Parent microstructure optimisation in steels and alloys using EBSD-based reconstruction

In this webinar, where are joined by one of the developers of a new approach to parent grain reconstruction, Dr Hung-Wei (Homer) Yen, who will be discussing the importance of understanding parent microstructures in the steel industry.

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Characterising and monitoring materials developed for use in extreme environments

Learn how the combination of EDS & EBSD on an electron microscope can be applied to the characterisation of materials ensuring manufacturing and product reliablity.

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