Ultrasonic nanocrystal surface modification for strength improvement and suppression of hydrogen permeation in multi-layered steel

Min Cheol Jo; Jisung Yoo; Auezhan Amanov; Taejin Song; Sang Heon Kim; Seok Su Sohn; Sunghak Lee

doi:10.1016/j.jallcom.2021.160975

Ultrasonic nanocrystal surface modification for strength improvement and suppression of hydrogen permeation in multi-layered steel

Min Cheol Jo, Jisung Yoo, Auezhan Amanov, Taejin Song, Sang Heon Kim, Seok Su Sohn, Sunghak Lee

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

9 Citations (Scopus)

Abstract

Hydrogen embrittlement of multi-layered steel (MLS) is significantly affected by a degree of hydrogen permeation from surface layers to interfaces. Here, the surface microstructure of multi-layered steel was modified for the first time using ultrasonic nanocrystal surface modification (UNSM), and the roles of UNSM-treated surface layers in strength and hydrogen permeation behavior were investigated by examining microstructural evolutions of the surface layer. Since the UNSM induced the compressive residual stress, grain refinement, and deformation twin formation at the specimen surface, the yield strength greatly improved via synergetic contributions of the grain refinement effect and dislocation strengthening. In addition, the UNSM-affected zone of 150–210 µm along depth direction effectively suppressed the hydrogen permeation by supplying compressive residual stresses and hydrogen trapping sites including grain boundaries, dislocations, and twin boundaries.

Original language	English
Article number	160975
Journal	Journal of Alloys and Compounds
Volume	885
DOIs	https://doi.org/10.1016/j.jallcom.2021.160975
Publication status	Published - 2021 Dec 10

Bibliographical note

Funding Information:
This work was supported by the Korea University Grant for Dr. S.S. Sohn, by the National Research Foundation of Korea ( NRF-2020R1C1C1003554 ), and by Korea Institute for Advancement of Technology (KIAT) grant funded by the Korea Government ( MOTIE ) ( P0002019 , The Competency Development Program for Industry Specialist).

Publisher Copyright:
© 2021 Elsevier B.V.

Keywords

Hydrogen permeation
Microstructural evolution
Multi-layered steel (MLS)
Tensile properties
Ultrasonic nanocrystal surface modification (UNSM)

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2021.160975

Cite this

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title = "Ultrasonic nanocrystal surface modification for strength improvement and suppression of hydrogen permeation in multi-layered steel",

abstract = "Hydrogen embrittlement of multi-layered steel (MLS) is significantly affected by a degree of hydrogen permeation from surface layers to interfaces. Here, the surface microstructure of multi-layered steel was modified for the first time using ultrasonic nanocrystal surface modification (UNSM), and the roles of UNSM-treated surface layers in strength and hydrogen permeation behavior were investigated by examining microstructural evolutions of the surface layer. Since the UNSM induced the compressive residual stress, grain refinement, and deformation twin formation at the specimen surface, the yield strength greatly improved via synergetic contributions of the grain refinement effect and dislocation strengthening. In addition, the UNSM-affected zone of 150–210 µm along depth direction effectively suppressed the hydrogen permeation by supplying compressive residual stresses and hydrogen trapping sites including grain boundaries, dislocations, and twin boundaries.",

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AU - Jo, Min Cheol

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AU - Amanov, Auezhan

AU - Song, Taejin

AU - Kim, Sang Heon

AU - Sohn, Seok Su

AU - Lee, Sunghak

N1 - Funding Information: This work was supported by the Korea University Grant for Dr. S.S. Sohn, by the National Research Foundation of Korea ( NRF-2020R1C1C1003554 ), and by Korea Institute for Advancement of Technology (KIAT) grant funded by the Korea Government ( MOTIE ) ( P0002019 , The Competency Development Program for Industry Specialist). Publisher Copyright: © 2021 Elsevier B.V.

PY - 2021/12/10

Y1 - 2021/12/10

N2 - Hydrogen embrittlement of multi-layered steel (MLS) is significantly affected by a degree of hydrogen permeation from surface layers to interfaces. Here, the surface microstructure of multi-layered steel was modified for the first time using ultrasonic nanocrystal surface modification (UNSM), and the roles of UNSM-treated surface layers in strength and hydrogen permeation behavior were investigated by examining microstructural evolutions of the surface layer. Since the UNSM induced the compressive residual stress, grain refinement, and deformation twin formation at the specimen surface, the yield strength greatly improved via synergetic contributions of the grain refinement effect and dislocation strengthening. In addition, the UNSM-affected zone of 150–210 µm along depth direction effectively suppressed the hydrogen permeation by supplying compressive residual stresses and hydrogen trapping sites including grain boundaries, dislocations, and twin boundaries.

AB - Hydrogen embrittlement of multi-layered steel (MLS) is significantly affected by a degree of hydrogen permeation from surface layers to interfaces. Here, the surface microstructure of multi-layered steel was modified for the first time using ultrasonic nanocrystal surface modification (UNSM), and the roles of UNSM-treated surface layers in strength and hydrogen permeation behavior were investigated by examining microstructural evolutions of the surface layer. Since the UNSM induced the compressive residual stress, grain refinement, and deformation twin formation at the specimen surface, the yield strength greatly improved via synergetic contributions of the grain refinement effect and dislocation strengthening. In addition, the UNSM-affected zone of 150–210 µm along depth direction effectively suppressed the hydrogen permeation by supplying compressive residual stresses and hydrogen trapping sites including grain boundaries, dislocations, and twin boundaries.

KW - Hydrogen permeation

KW - Microstructural evolution

KW - Multi-layered steel (MLS)

KW - Tensile properties

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Ultrasonic nanocrystal surface modification for strength improvement and suppression of hydrogen permeation in multi-layered steel

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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