Article
Materials Science, Multidisciplinary
Ahjeong Lyu, Junghoon Lee, Jae-Hoon Nam, Minjeong Kim, Young-Kook Lee
Summary: In this study, the H absorption and H embrittlement (HE) resistance of medium (3-7 wt%) Mn martensitic steels were investigated. The 7 wt% Mn specimen had the highest diffusible H content due to the highest reversible H trap density when the specimens were electrochemically H-charged. When the diffusible H content was the same, the HE resistance deteriorated due to Mn addition, possibly caused by grain boundary decohesion and H segregation into the grain boundaries. However, this condition was improved by B addition due to enhanced grain boundary cohesion and suppression of H segregation into the grain boundaries.
Review
Materials Science, Multidisciplinary
Lawrence Cho, Yuran Kong, John G. Speer, Kip O. Findley
Summary: Recent research has focused on developing advanced/ultrahigh-strength medium-Mn steels, leading to the introduction of new alloying concepts, processing routes, and microstructural variants. Despite this progress, certain grades of A/UHSS are still highly susceptible to hydrogen embrittlement due to their high strength levels. This paper aims to review the current understanding of hydrogen embrittlement in medium or intermediate Mn multiphase steels and discuss various alloying and processing strategies to enhance their resistance to hydrogen.
Article
Nanoscience & Nanotechnology
Jun Zhang, Mingxin Huang, Binhan Sun, Boning Zhang, Ran Ding, Cheng Luo, Wu Zeng, Chi Zhang, Zhigang Yang, Sybrand van der Zwaag, Hao Chen
Summary: The effect of Lfiders banding on hydrogen embrittlement susceptibility of medium Mn steels was investigated by varying the degree of yield point elongation. It was found that steels with a larger YPE were more susceptible to hydrogen embrittlement. The presence of Lfiders banding and localized deformation play a key role in influencing the overall hydrogen embrittlement susceptibility of medium Mn steels.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Yi Luo, Hongzhou Lu, Na Min, Wei Li, Xuejun Jin
Summary: The addition of Mo and Nb has significant effects on the mechanical properties and hydrogen embrittlement of hot-rolled medium-Mn steel, with Nb showing a more pronounced effect. Nb addition forms filmy retained austenite that inhibits hydrogen-induced cracks, leading to improved hydrogen embrittlement resistance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Review
Materials Science, Multidisciplinary
Binhan Sun, Alisson Kwiatkowski da Silva, Yuxiang Wu, Yan Ma, Hao Chen, Colin Scott, Dirk Ponge, Dierk Raabe
Summary: This review critically discusses the microstructure and mechanical responses of steels with medium manganese content, highlighting the differences from established steel grades. It addresses the phase transformation phenomena and mechanical behavior of these steels, covering the whole inelastic deformation regime. The relationships between processing, microstructure, and mechanical properties are assessed and open questions and challenges are identified for future research efforts.
INTERNATIONAL MATERIALS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Nu -Ri Cho, Jae-Hoon Nam, Jin-Young Lee, Young-Kook Lee
Summary: In this study, the influence of austenitizing condition on H absorption and hydrogen embrittlement in Zn-Al coated medium-Mn steel was investigated. The specimen austenitized at 750℃ for 5 minutes showed high resistance to hydrogen embrittlement due to its low diffusible hydrogen content. The presence of a uniform Al2O3 oxide layer and a low hydrogen diffusion rate contributed to the low hydrogen content. However, an increase in austenitizing temperature accelerated hydrogen absorption, resulting in decreased resistance to hydrogen embrittlement.
Article
Materials Science, Multidisciplinary
Yuxuan Liu, Zuoheng Cao, Chengpeng Huang, Chen Hu, Mingxin Huang
Summary: This study investigates the issue of hydrogen embrittlement caused by fresh martensite in medium Mn steel and proposes an elongated, banded morphology to mitigate hydrogen embrittlement. Comparatively, the elongated grain or phase boundaries in the proposed morphology design can effectively impede the propagation of hydrogen-induced cracks, leading to improved resistance to hydrogen embrittlement.
SCIENCE CHINA-MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Minjeong Kim, Ahjeong Lyu, Hyun-Bin Jeong, Jin-Young Lee, Young-Kook Lee
Summary: In this study, the hydrogen embrittlement (HE) of martensitic medium-Mn steels with varying levels of S and Ti contents was investigated. It was found that the specimens with S or S-Ti additions exhibited higher HE resistance compared to the S-free specimens due to the presence of fine MnS or Ti(C,N) MnS complex inclusions. However, the presence of coarse elongated inclusions was found to be detrimental to HE resistance. Therefore, the key to improving the HE resistance of martensitic medium-Mn steel lies in the distribution of a large volume fraction of fine MnS or Ti(C,N) MnS complex inclusions without coarse elongated ones.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Di Wan, Yan Ma, Binhan Sun, Nima Razavi, Dong Wang, Xu Lu, Wenwen Song
Summary: FCG tests were conducted on a medium-Mn steel annealed at two different temperatures, with in-situ hydrogen plasma charging increasing the FCGR compared to vacuum conditions. Fractographic investigations showed brittle crack growth in the hydrogen environment and ductile transgranular growth in vacuum, with a reduced plastic deformation zone in the presence of hydrogen. The study provides insights into the FCG mechanism with and without hydrogen under in-situ charging conditions.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Lin Chen, Stoichko Antonov, Keke Song, Huihui Zhi, Wenyao Li, Yong Chen, Kuanhui Hu, Yong Zhong, Yanjing Su, Lijie Qiao
Summary: This study investigated the effect of solution atoms on the hydrogen embrittlement resistance of TWIP steels, finding that Fe-30Mn-3Al3Si steel showed better resistance compared to Fe-30Mn-0.6C steel. Additionally, the crack mode of Fe-30Mn-3Al3Si steel was a combination of transgranular and intergranular cracks, while transgranular cracks were rarely found in Fe-30Mn-0.6C steel.
Article
Materials Science, Multidisciplinary
Kyung-Shik Kim, Jee-Hyun Kang, Sung-Joon Kim
Summary: The study revealed that carbon can alleviate the impact of hydrogen on the tensile properties of stainless steel, but increasing the carbon content does not significantly affect hydrogen diffusivity. Cracks induced by hydrogen mainly occur at grain boundaries and propagate inside grains, but are suppressed by grain boundaries.
Article
Chemistry, Multidisciplinary
Kejun Shi, Xinyu Meng, Shu Xiao, Guohua Chen, Hao Wu, Chilou Zhou, Saihua Jiang, Paul K. Chu
Summary: MXene coatings on pipe steel exhibit excellent hydrogen resistance and corrosion protection by forming a barrier against diffusion, with hydrogen permeability of one third of the substrate and decreased diffusion coefficient. The concentration of the d-MXene colloidal suspension determines the thickness of a single coating, while surface damage caused by the suspension may limit improvements in hydrogen resistance.
Article
Metallurgy & Metallurgical Engineering
Jun Zhang, Binhan Sun, Zhigang Yang, Chi Zhang, Hao Chen
Summary: This study proposes a microstructure architecting strategy based on a core-shell compositional distribution to enhance the hydrogen embrittlement resistance in advanced high-strength steels. By accurately designing the distribution of components within the austenite phase, it is possible to inhibit the formation and growth of hydrogen embrittlement while maintaining the mechanical performance of the material.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
S. S. Shishvan, G. Csanyi, V. S. Deshpande
Summary: The susceptibility of ferritic steels to hydrogen embrittlement increases with decreasing strain rates. This is explained by the diffusion of hydrogen. However, for pre-charged specimens, lattice diffusion dominates and has no effect at such low strain rates. A model based on the Hydrogen Induced Fast-Fracture (HIFF) mechanism is presented to rationalize the strain rate dependence of hydrogen embrittlement. The dominant kinetics governing the strain rate sensitivity is the hydrogen desorption rates from cavity surfaces.
Article
Chemistry, Physical
Haoyang Zhao, Pei Wang, Jinxu Li
Summary: Increasing vanadium content improves the resistance to hydrogen embrittlement in bolt steels, with vanadium precipitates acting as reversible hydrogen traps that inhibit hydrogen-dislocation interactions. Lower dislocation density and finer martensitic structure also contribute to hindering hydrogen-induced cracking.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
