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图案质量对应力异质性和通过高角度分辨率电子反射散射衍射测量几何必要的位移密度的测量的影响

Harison S Wiesman¹, David Wallis²

¹Department of Earth Sciences, University of Cambridge, Cambridge, UK; Now at School of Earth and Environmental Sciences, University of Minnesota, Minneapolis, MN, USA.

Ultramicroscopy

|February 13, 2026

概括

在高角度分辨率电子反射散射衍射 (HR-EBSD) 中增加平均值可以提高图案质量. 这减少了应力和位移密度图中的噪声,揭示了更多的亚结构,并增强了对关键微观结构特征的分析.

科学领域:

材料科学材料科学材料科学
地质地质地质地质地质地
晶体学晶体学是指结晶学.

背景情况:

高角分辨率电子反射散射衍射 (HR-EBSD) 对于分析微观结构特征至关重要.
图案质量,通常由带对比表示,显著影响HR-EBSD数据可靠性.
几何必要脱位 (GND) 密度和内粒体应力异质性是从HR-EBSD获得的关键参数.

研究的目的:

调查模式质量的变化对HR-EBSD分析结果的影响.
确定调整平均如何影响应力和GND密度的测量.
为优化HR-EBSD数据收集和解释提供指导方针.

主要方法:

通过调整每个电子反散模式的平均数来系统地改变图案质量.
一个变形的橄树样本的同一区域被多次映射出不同的平均值 (1-30).
对每个数据集进行了HR-EBSD分析,以生成压力异质性和GND密度的地图.

主要成果:

增加了框架平均值,减少了应力和GND密度图中的噪声,提高了亚结构的可见性.
最初带对比度较低的像素在更高的平均值时显示出最显著的改善.
应力的概率分布缩小了,由于减少了高应力噪声,失位密度估计得到了改进.

结论:

框架平均化是提高HR-EBSD数据质量的有效技术,特别是在初始频段对比度较低的感兴趣区域.
优化平均可以导致更准确的特征应力异质性和GND密度.
未来的HR-EBSD研究应该确保跨数据集的可比平均带对比度,以避免影响微观结构解释的集合文物.

关键词:

带对比带对比带对比带的对比.失位密度失位密度失位密度欧洲银行股票监督管理局 (EBSDD) 的工作.地质材料地质材料.人权高官-欧洲安全与发展理事会压力异质性的压力异质性

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