Correlation between the hydrogen chemical potential and pop-in load during in situ electrochemical nanoindentation

被引：32

作者：

Barnoush, Afrooz ^{[1
]}

Kheradmand, Nousha ^{[1
]}

Hajilou, Tarlan ^{[1
]}

机构：

[1] Dept Engn Design & Mat, N-7491 Trondheim, Norway

来源：

SCRIPTA MATERIALIA | 2015年 / 108卷

关键词：

Hydrogen embrittlement; Nanoindentation; Electrochemical; Dislocation nucleation; Steel; VACANCY FORMATION ENERGIES; REDUCING GRAIN-BOUNDARY; DISLOCATION NUCLEATION; MECHANICAL-PROPERTIES; SOLUTE SEGREGATION; SINGLE-CRYSTAL; PLASTICITY; DIFFUSION; FRACTURE; ONSET;

D O I：

10.1016/j.scriptamat.2015.06.021

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The variation in the pop-in load during electrochemical nanoindentation of Fe 3 wt.% Si alloy at different cathodic polarizations was measured. It is clearly shown that a higher hydrogen chemical potential results in a lower pop-in load, which is an indication of easier dislocation nucleation below the tip. Classic dislocation theory and defactant model are used to analyze the data and calculate the excess hydrogen on the dislocation line at different electrochemical potentials. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：76 / 79

页数：4

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