In-situ micro-cantilever bending test in environmental scanning electron microscope: Real time observation of hydrogen enhanced cracking

被引：57

作者：

Deng, Y. ^{[1
]}

Hajilou, T. ^{[1
]}

Wan, D. ^{[1
]}

Kheradmand, N. ^{[1
]}

Barnoush, A. ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Engn Design & Mat, NO-7491 Trondheim, Norway

来源：

SCRIPTA MATERIALIA | 2017年 / 127卷

关键词：

In-situ test; Iron aluminides (FeAl); Hydrogen embrittlement; FEAL SINGLE-CRYSTALS; STRAIN-RATE; YIELD STRENGTH; FRACTURE; EMBRITTLEMENT; IRON; DUCTILITY; ALLOY; DISLOCATIONS; FE-40AL;

D O I：

10.1016/j.scriptamat.2016.08.026

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A novel approach of in-situ micro-cantilever bending tests is introduced, integrating nanoindentation and environmental scanning electron microscopy (ESEM) to elucidate hydrogen embrittlement (HE) in FeAl. Bending tests were performed in vacuum (similar to 5 x 10(-4) Pa) and in ESEM with water vapor (180 Pa, 450 Pa) conditions,which introduce H in-situ into the cantilevers during the test. Micro-scale In-situ SEM testing provides a full control of all the parameters involved in HE as well as avoids the proximity effect from the free surface, which is always criticized in nano-scale in-situ TEM experiments. Both hydrogen induced cracking and hydrogen reduced flow stress were observed. (C) 2016 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.

引用

页码：19 / 23

页数：5

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