In situ electrochemical microcantilever bending test: A new insight into hydrogen enhanced cracking

Tarlan Hajilou; Yun Deng; Bjørn Rune Rogne; Nousha Kheradmand; Afrooz Barnoush

doi:10.1016/j.scriptamat.2017.01.019

In situ electrochemical microcantilever bending test: A new insight into hydrogen enhanced cracking

Tarlan Hajilou, Yun Deng, Bjørn Rune Rogne, Nousha Kheradmand, Afrooz Barnoush^*

^*Corresponding author for this work

Department of Engineering Design and Materials

Research output: Contribution to journal › Article › peer-review

86 Citations (Scopus)

Abstract

Single crystalline microcantilevers of Fe–3wt% Si were bent while electrochemically hydrogen (H) charged in situ inside a miniaturized electrochemical cell and are compared with cantilevers bent in air. Yield point decreases, crack initiation and propagation were observed for the cantilevers bent in the presence of H, while notch blunting occurred for the cantilevers bent in air. The results show H enhanced dislocation nucleation and H pinning of dislocation at the crack tip are responsible for embrittlement.

Original language	English
Pages (from-to)	17-21
Number of pages	5
Journal	Scripta Materialia
Volume	132
DOIs	https://doi.org/10.1016/j.scriptamat.2017.01.019
Publication status	Published - 15 Apr 2017
Externally published	Yes

Keywords

Cathodic protection
Fracture
Hydrogen embrittlement
Micromechanical testing
Steel

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10.1016/j.scriptamat.2017.01.019

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title = "In situ electrochemical microcantilever bending test: A new insight into hydrogen enhanced cracking",

abstract = "Single crystalline microcantilevers of Fe–3wt\% Si were bent while electrochemically hydrogen (H) charged in situ inside a miniaturized electrochemical cell and are compared with cantilevers bent in air. Yield point decreases, crack initiation and propagation were observed for the cantilevers bent in the presence of H, while notch blunting occurred for the cantilevers bent in air. The results show H enhanced dislocation nucleation and H pinning of dislocation at the crack tip are responsible for embrittlement.",

keywords = "Cathodic protection, Fracture, Hydrogen embrittlement, Micromechanical testing, Steel",

author = "Tarlan Hajilou and Yun Deng and Rogne, \{Bj{\o}rn Rune\} and Nousha Kheradmand and Afrooz Barnoush",

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doi = "10.1016/j.scriptamat.2017.01.019",

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T1 - In situ electrochemical microcantilever bending test

T2 - A new insight into hydrogen enhanced cracking

AU - Hajilou, Tarlan

AU - Deng, Yun

AU - Rogne, Bjørn Rune

AU - Kheradmand, Nousha

AU - Barnoush, Afrooz

PY - 2017/4/15

Y1 - 2017/4/15

N2 - Single crystalline microcantilevers of Fe–3wt% Si were bent while electrochemically hydrogen (H) charged in situ inside a miniaturized electrochemical cell and are compared with cantilevers bent in air. Yield point decreases, crack initiation and propagation were observed for the cantilevers bent in the presence of H, while notch blunting occurred for the cantilevers bent in air. The results show H enhanced dislocation nucleation and H pinning of dislocation at the crack tip are responsible for embrittlement.

AB - Single crystalline microcantilevers of Fe–3wt% Si were bent while electrochemically hydrogen (H) charged in situ inside a miniaturized electrochemical cell and are compared with cantilevers bent in air. Yield point decreases, crack initiation and propagation were observed for the cantilevers bent in the presence of H, while notch blunting occurred for the cantilevers bent in air. The results show H enhanced dislocation nucleation and H pinning of dislocation at the crack tip are responsible for embrittlement.

KW - Cathodic protection

KW - Fracture

KW - Hydrogen embrittlement

KW - Micromechanical testing

KW - Steel

UR - https://www.scopus.com/pages/publications/85010767202

U2 - 10.1016/j.scriptamat.2017.01.019

DO - 10.1016/j.scriptamat.2017.01.019

M3 - Article

AN - SCOPUS:85010767202

SN - 1359-6462

VL - 132

SP - 17

EP - 21

JO - Scripta Materialia

JF - Scripta Materialia

ER -

In situ electrochemical microcantilever bending test: A new insight into hydrogen enhanced cracking

Abstract

Keywords

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