Effect of hydrogen on the hardness of different phases in super duplex stainless steel

Nousha Kheradmand; Roy Johnsen; Jim Stian Olsen; Afrooz Barnoush

doi:10.1016/j.ijhydene.2015.10.106

Effect of hydrogen on the hardness of different phases in super duplex stainless steel

Nousha Kheradmand^*, Roy Johnsen, Jim Stian Olsen, Afrooz Barnoush

^*Corresponding author for this work

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

45 Citations (Scopus)

Abstract

Despite its superior corrosion resistance, super duplex stainless steels (SDSS) are prone to hydrogen embrittlement. In this paper, a novel in situ electrochemical nanoindentation technique is used to investigate the hydrogen effect on the nanomechanical response of the existing phases in SDSS, i.e. ferrite and austenite. A systematic change in electrochemical (EC) charging potential revealed the interconnected nature of the hydrogen effect on the nanomechanical properties of SDSS. It is shown that the hydrogen effects in each phase are very different and are strongly coupled with the existing residual stresses in the microstructure induced during the manufacturing and/or induced by EC hydrogen charging.

Original language	English
Pages (from-to)	704-712
Number of pages	9
Journal	International Journal of Hydrogen Energy
Volume	41
Issue number	1
DOIs	https://doi.org/10.1016/j.ijhydene.2015.10.106
Publication status	Published - 5 Jan 2016
Externally published	Yes

Keywords

Austenite
Electrochemical nanoindentation
Ferrite
Nano hardness
Residual stress
Super duplex stainless steel

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10.1016/j.ijhydene.2015.10.106

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title = "Effect of hydrogen on the hardness of different phases in super duplex stainless steel",

abstract = "Despite its superior corrosion resistance, super duplex stainless steels (SDSS) are prone to hydrogen embrittlement. In this paper, a novel in situ electrochemical nanoindentation technique is used to investigate the hydrogen effect on the nanomechanical response of the existing phases in SDSS, i.e. ferrite and austenite. A systematic change in electrochemical (EC) charging potential revealed the interconnected nature of the hydrogen effect on the nanomechanical properties of SDSS. It is shown that the hydrogen effects in each phase are very different and are strongly coupled with the existing residual stresses in the microstructure induced during the manufacturing and/or induced by EC hydrogen charging.",

keywords = "Austenite, Electrochemical nanoindentation, Ferrite, Nano hardness, Residual stress, Super duplex stainless steel",

author = "Nousha Kheradmand and Roy Johnsen and Olsen, \{Jim Stian\} and Afrooz Barnoush",

note = "Publisher Copyright: {\textcopyright} 2015 Hydrogen Energy Publications, LLC.",

year = "2016",

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doi = "10.1016/j.ijhydene.2015.10.106",

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T1 - Effect of hydrogen on the hardness of different phases in super duplex stainless steel

AU - Kheradmand, Nousha

AU - Johnsen, Roy

AU - Olsen, Jim Stian

AU - Barnoush, Afrooz

PY - 2016/1/5

Y1 - 2016/1/5

N2 - Despite its superior corrosion resistance, super duplex stainless steels (SDSS) are prone to hydrogen embrittlement. In this paper, a novel in situ electrochemical nanoindentation technique is used to investigate the hydrogen effect on the nanomechanical response of the existing phases in SDSS, i.e. ferrite and austenite. A systematic change in electrochemical (EC) charging potential revealed the interconnected nature of the hydrogen effect on the nanomechanical properties of SDSS. It is shown that the hydrogen effects in each phase are very different and are strongly coupled with the existing residual stresses in the microstructure induced during the manufacturing and/or induced by EC hydrogen charging.

AB - Despite its superior corrosion resistance, super duplex stainless steels (SDSS) are prone to hydrogen embrittlement. In this paper, a novel in situ electrochemical nanoindentation technique is used to investigate the hydrogen effect on the nanomechanical response of the existing phases in SDSS, i.e. ferrite and austenite. A systematic change in electrochemical (EC) charging potential revealed the interconnected nature of the hydrogen effect on the nanomechanical properties of SDSS. It is shown that the hydrogen effects in each phase are very different and are strongly coupled with the existing residual stresses in the microstructure induced during the manufacturing and/or induced by EC hydrogen charging.

KW - Austenite

KW - Electrochemical nanoindentation

KW - Ferrite

KW - Nano hardness

KW - Residual stress

KW - Super duplex stainless steel

UR - https://www.scopus.com/pages/publications/84954379425

U2 - 10.1016/j.ijhydene.2015.10.106

DO - 10.1016/j.ijhydene.2015.10.106

M3 - Article

AN - SCOPUS:84954379425

SN - 0360-3199

VL - 41

SP - 704

EP - 712

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 1

ER -

Effect of hydrogen on the hardness of different phases in super duplex stainless steel

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Keywords

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