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Updated: Jan 8, 2026

$Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction$

Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction

Published on: April 1, 2017

对重度变形的多层复合材料的粒度结构进行深入分析,这些复合材料是由电子反向散射的衍射作用造成的

Luo Sung Hong¹, Fu-Ming Xiaoyu²

¹Chongqing Vocational Institute of Civil Engineering, No. 725, East Changzhou Avenue, Yongchuan District, Chongqing, China.

Micron (Oxford, England : 1993)

|December 11, 2025

概括

这项研究研究了使用累积卷粘合 (ARB) 制造的铜复合材料. 增加ARB通过了精炼的粒度大小和增强的硬度,在表面和中心区域之间观察到的变化.

科学领域:

材料科学材料科学材料科学
金工程金工程金工程
复合材料复合材料复合材料

背景情况:

了解金属矩阵复合材料的微结构演变对于定制其机械性能至关重要.
铜-Mg和Mg-Cu复合材料提供独特的性能组合,这是由于每个金属的独特特性.

研究的目的:

分析累积卷粘合 (ARB) 对Cu-Mg和Mg-Cu多层复合材料的纹理,粒径,粒径边界和硬度的影响.
调查变形通道和区域变化 (表面与中心) 对这些属性的影响.

主要方法:

使用累积滚粘合 (ARB) 方法制造多层Cu/Mg/Cu和Mg/Cu/Mg复合材料.
检查微观结构特征,包括纹理 (滚动和剪切),粒径和粒径边界在各种ARB通道和复合区域.
使用核心平均误导 (KAM) 成像分析菌株分布.
通过复合材料厚度测量硬度.

主要成果:

累积卷粘合 (ARB) 处理导致层波动,和碎片随着越来越多的通过.
滚动和剪切纹理占主导地位,滚动纹理强度随着ARB通过而增加,剪切纹理在表面附近加剧.
在所有层中都发生了显著的粒度提炼,外层比内层呈现出更细的粒度. 颗粒大小从表面增加到中心.
在表面区域的边界附近观察到更高的应变积累.
硬度随着ARB通过而增加,但从复合材料表面到中心的硬度下降.

结论:

该ARB方法有效地改进了微观结构,并提高了Cu-Mg复合材料的硬度.
微观结构和特性存在区域差异,表面区域经历更大的应变和更细粒.
这些发现为ARB处理的Cu-Mg复合材料的结构性质关系提供了洞察力.

关键词:

铜铜铜铜铜铜谷物边界的谷物边界是什么硬度硬度硬度硬度是的重要组成部分.质地质地质地

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