Crystal Plasticity based Study to Understand the Interaction of Hydrogen, Defects and Loading in Austenitic Stainless Steel Single Crystals

Eugene Ogosi; Amir Siddiq; Umair Bin Asim; Mehmet E. Kartal

doi:10.1016/j.ijhydene.2020.08.181

Crystal Plasticity based Study to Understand the Interaction of Hydrogen, Defects and Loading in Austenitic Stainless Steel Single Crystals

Eugene Ogosi, Amir Siddiq^* (Corresponding Author), Umair Bin Asim, Mehmet E. Kartal

^*Corresponding author for this work

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

3 Citations (Scopus)

Abstract

A crystal plasticity-based finite element study is performed to understand hydrogen effects on void growth in single crystals of austenitic stainless steel. The model assumes plastic deformation is driven primarily by dislocation motion and captures the influence of hydrogen. Hydrogen effects are incorporated by assuming agreement with the hydrogen enhanced localised plasticity (HELP) mechanism. Despite experimental evidence, hydrogen effect on face centred cubic (FCC) crystals has hitherto not been considered in a numerical void growth model for a wide range of stress states. For the first time, the influence of hydrogen on void growth for different Lode parameters at single crystalline levels is investigated for a range of stress triaxialities in FCC crystals. Hydrogen was found to increase equivalent stresses and hardening responses for various stress triaxialities and Lode parameters. Hydrogen also induces higher void growth response at different stress states, and this was more pronounced at high stress triaxialities.

Original language	English
Pages (from-to)	32632-32647
Number of pages	16
Journal	International Journal of Hydrogen Energy
Volume	45
Issue number	56
Early online date	16 Sep 2020
DOIs	https://doi.org/10.1016/j.ijhydene.2020.08.181
Publication status	Published - 13 Nov 2020

Keywords

Hydrogen Enhanced Localised Plasticity
Hydrogen Embrittlement
Crystal Plasticity
Stress Triaxiality
Lode Parameter
Void Growth

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Crystal Plasticity based Study to Understand the Interaction of Hydrogen, Defects and Loading in Austenitic Stainless Steel Single Crystals. / Ogosi, Eugene; Siddiq, Amir (Corresponding Author); Asim, Umair Bin et al.

In: International Journal of Hydrogen Energy, Vol. 45, No. 56, 13.11.2020, p. 32632-32647.

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

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title = "Crystal Plasticity based Study to Understand the Interaction of Hydrogen, Defects and Loading in Austenitic Stainless Steel Single Crystals",

abstract = "A crystal plasticity-based finite element study is performed to understand hydrogen effects on void growth in single crystals of austenitic stainless steel. The model assumes plastic deformation is driven primarily by dislocation motion and captures the influence of hydrogen. Hydrogen effects are incorporated by assuming agreement with the hydrogen enhanced localised plasticity (HELP) mechanism. Despite experimental evidence, hydrogen effect on face centred cubic (FCC) crystals has hitherto not been considered in a numerical void growth model for a wide range of stress states. For the first time, the influence of hydrogen on void growth for different Lode parameters at single crystalline levels is investigated for a range of stress triaxialities in FCC crystals. Hydrogen was found to increase equivalent stresses and hardening responses for various stress triaxialities and Lode parameters. Hydrogen also induces higher void growth response at different stress states, and this was more pronounced at high stress triaxialities.",

keywords = "Hydrogen Enhanced Localised Plasticity, Hydrogen Embrittlement, Crystal Plasticity, Stress Triaxiality, Lode Parameter, Void Growth",

author = "Eugene Ogosi and Amir Siddiq and Asim, {Umair Bin} and Kartal, {Mehmet E.}",

note = "Acknowledgements We express our appreciation to Apache North Sea and the University of Aberdeen for their support.",

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T1 - Crystal Plasticity based Study to Understand the Interaction of Hydrogen, Defects and Loading in Austenitic Stainless Steel Single Crystals

AU - Ogosi, Eugene

AU - Siddiq, Amir

AU - Asim, Umair Bin

AU - Kartal, Mehmet E.

N1 - Acknowledgements We express our appreciation to Apache North Sea and the University of Aberdeen for their support.

PY - 2020/11/13

Y1 - 2020/11/13

N2 - A crystal plasticity-based finite element study is performed to understand hydrogen effects on void growth in single crystals of austenitic stainless steel. The model assumes plastic deformation is driven primarily by dislocation motion and captures the influence of hydrogen. Hydrogen effects are incorporated by assuming agreement with the hydrogen enhanced localised plasticity (HELP) mechanism. Despite experimental evidence, hydrogen effect on face centred cubic (FCC) crystals has hitherto not been considered in a numerical void growth model for a wide range of stress states. For the first time, the influence of hydrogen on void growth for different Lode parameters at single crystalline levels is investigated for a range of stress triaxialities in FCC crystals. Hydrogen was found to increase equivalent stresses and hardening responses for various stress triaxialities and Lode parameters. Hydrogen also induces higher void growth response at different stress states, and this was more pronounced at high stress triaxialities.

AB - A crystal plasticity-based finite element study is performed to understand hydrogen effects on void growth in single crystals of austenitic stainless steel. The model assumes plastic deformation is driven primarily by dislocation motion and captures the influence of hydrogen. Hydrogen effects are incorporated by assuming agreement with the hydrogen enhanced localised plasticity (HELP) mechanism. Despite experimental evidence, hydrogen effect on face centred cubic (FCC) crystals has hitherto not been considered in a numerical void growth model for a wide range of stress states. For the first time, the influence of hydrogen on void growth for different Lode parameters at single crystalline levels is investigated for a range of stress triaxialities in FCC crystals. Hydrogen was found to increase equivalent stresses and hardening responses for various stress triaxialities and Lode parameters. Hydrogen also induces higher void growth response at different stress states, and this was more pronounced at high stress triaxialities.

KW - Hydrogen Enhanced Localised Plasticity

KW - Hydrogen Embrittlement

KW - Crystal Plasticity

KW - Stress Triaxiality

KW - Lode Parameter

KW - Void Growth

U2 - 10.1016/j.ijhydene.2020.08.181

DO - 10.1016/j.ijhydene.2020.08.181

M3 - Article

VL - 45

SP - 32632

EP - 32647

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 56

ER -

Crystal Plasticity based Study to Understand the Interaction of Hydrogen, Defects and Loading in Austenitic Stainless Steel Single Crystals

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Keywords

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