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本文阐述了我们近年来利用离子微探针对氢在材料中的基本行为研究取得的若干新进展:(1) 在裂纹尖端氢分布研究方面有突破性进展,首次实验发现在受载裂纹尖端存在着氢富集的双峰,对氢双峰的变化规律和形成原因进行了系统研究,并提出了相应的模型;(2) 实验确证了氢在六角密堆结构(hcp)和高位错密度(10~(12)/cm~2)材料塑性形变过程中的可动位错输运行为,并揭示了氢在位错芯部的“隧道扩散效应”;(3) 定量测定了工程厚度材料微区氢浓度分布,通过Fourier变换和Laplace变换,建立了新的微区氢扩散方程解析式,具有重要的实用价值。
In this paper, we present some new advances in the basic behavior of hydrogen in materials using ion microprobe in recent years: (1) there is a breakthrough in the study of hydrogen distribution at the crack tip. The first experiment found that at the tip of the loaded crack (2) Experiments confirmed that hydrogen has a high hydrogen dislocation density (hcp) and a high dislocation density ( 10 ~ (12) / cm ~ 2), and revealed the “tunnel diffusion effect” of hydrogen in the core of dislocations. (3) Quantitatively measured the micro- It is of great practical value to establish a new analytic formula of hydrogen diffusion equation in the area by Fourier transform and Laplace transform.