In situ electrochemical nanoindentation of FeAl (100) single crystal: Hydrogen effect on dislocation nucleation

被引：0
|
作者：
Barnoush, Afrooz [1 ]
Bies, Christian [1 ]
Vehoff, Horst [1 ]
机构：
[1] Univ Saarland, Dept Mat & Methods, D-66123 Saarbrucken, Germany
来源：
JOURNAL OF MATERIALS RESEARCH | 2009年 / 24卷 / 03期
关键词：
TEMPERATURE MECHANICAL-BEHAVIOR; INCIPIENT PLASTICITY; INDENTATION SIZE; HYDROGEN/DEFORMATION INTERACTION; LOCAL EXAMINATION; GRAIN-BOUNDARIES; STAINLESS-STEELS; POP-IN; EMBRITTLEMENT; SIMULATIONS;
D O I：
10.1557/JMR.2009.0084
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The hydrogen effect oil dislocation nucleation in FeAl single crystal with (100) surface orientation has been examined with the aid of a specifically designed nanoindentation setup for in situ electrochemical experiments. The effect of the electrochemical potential on the indent load-displacement Curve, especially the unstable elastic-plastic transition (pop-in), was studied in detail. The observations showed a reduction in the pop-in load for both samples clue to in Situ hydrogen charging, which is reproducibly observed within sequential hydrogen charging and discharging. Clear evidence is provided that hydrogen atoms facilitate homogeneous dislocation nucleation.
引用
收藏
页码：1105 / 1113
页数：9
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