Article
Chemistry, Physical
Liese Vandewalle, Tom Depover, Kim Verbeken
Summary: This study evaluates the absorption and trapping of hydrogen in carbide-containing steels at elevated temperatures from a low hydrogen partial pressure atmosphere. The titanium-containing Fe-C steels absorb a significant amount of hydrogen during tempering and exhibit strong trapping ability. This may be attributed to trapping at the carbon-vacancies inside TiC and large undissolved carbides.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Polina Metalnikov, Guy Ben-Hamu, Dan Eliezer
Summary: This study investigates the hydrogen embrittlement of 316L stainless steel produced by laser powder bed fusion through hydrogen trapping. The availability of hydrogen in the material is influenced by its interactions with trapping sites, which affects the material's susceptibility to hydrogen-induced cracking.
Article
Nanoscience & Nanotechnology
Polina Metalnikov, Dan Eliezer, Guy Ben-Hamu
Summary: This study found that the susceptibility to hydrogen embrittlement (HE) differs significantly between Ti?6Al?4V alloys prepared by selective laser melting (SLM) and electron beam melting (EBM). The degradation of SLM Ti?6Al?4V in a hydrogen containing environment is likely to occur through hydride formation and cleavage mechanism, while Ti?6Al?4V prepared by EBM is more likely to degrade through hydrogen enhanced localized plasticity (HELP) mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Xu Lu, Tom Depover, Roy Johnsen
Summary: This study investigates hydrogen diffusion and trapping in nickel Alloy 625 through hot extraction test and thermal desorption spectroscopy analysis. The results show that grain size and grain boundary carbide can affect hydrogen diffusion and lower its rate by altering the diffusion and trapping behavior of hydrogen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Yafei Wang, Songyan Hu, Guangxu Cheng
Summary: Using the finite element method, the hydrogen diffusion process in ferritic steel during thermal desorption was simulated based on a two-dimensional diffusion-trapping coupled model. The study found that the specimen geometry had a more pronounced effect on desorption spectra for smaller specimens. This research may contribute to a better understanding and interpretation of TDS curves by considering the size effect.
Article
Chemistry, Physical
Leonardo Simoni, Tiago Falcade, Daniel C. F. Ferreira, Carlos E. F. Kwietniewski
Summary: The study investigates hydrogen diffusion and trapping in high-strength steel, using experimental data and a numerical model. It finds that more rigorous analysis methods provide improved predictions compared to general analytical approaches.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
J. Bestautte, A. Oudriss, M. Lenci, D. Bechet, Z. Obadia, X. Feaugas, F. Christien
Summary: The trapping behavior of hydrogen in a Fe-Cr-Ni-Al-Mo alloy was investigated using different metallurgical states obtained by heat treatment. The study found that low-misfit coherent B2-NiAl precipitates have limited trapping capability, while high dislocation density and reverted austenite significantly trap hydrogen.
Article
Materials Science, Multidisciplinary
Mathias Truschner, Robin Kroll, Matthias Eichinger, Andreas Keplinger, Dirk L. Engelberg, Gregor Mori
Summary: The hydrogen uptake and embrittlement characteristics of a cold-drawn austenitic stainless steel wire were investigated. The resistance to hydrogen embrittlement was found to decrease significantly with a 50% degree of cold deformation. The hydrogen content was assessed using thermal desorption and laser-induced breakdown spectroscopy, which established a correlation between the absorbed hydrogen and the intensity of near-surface hydrogen. The sub-surface hydrogen content of the hot-rolled specimen was determined to be 791 wt.ppm.
Article
Materials Science, Multidisciplinary
Yange Zhang, Xiangyan Li, Yichun Xu, Yawei Lei, Zhuoming Xie, Xianping Wang, Qianfeng Fang, Changsong Liu, Xuebang Wu
Summary: This work investigates the role of coherent and semi-coherent interfaces between W and ZrC on hydrogen trapping, desorption, and clustering in nanostructured W alloys. The study finds that pure interfaces have comparable trapping abilities with intrinsic defects in bulk W, while interfaces with W/C vacancies show stronger trapping capabilities, especially for semi-coherent interfaces. The strong traps of vacancy-containing phase interfaces effectively absorb hydrogen and prevent hydrogen-induced damage. This work provides insights into the atomic-level understanding of hydrogen trapping and clustering at phase interfaces, offering explanations for experimental observations and suggesting a feasible route for interface engineering against hydrogen-induced damage in structural metals.
Review
Metallurgy & Metallurgical Engineering
Liese Vandewalle, Milan J. Konstantinovic, Tom Depover, Kim Verbeken
Summary: Hydrogen embrittlement of steels has a significant impact in engineering sectors, requiring a profound understanding of hydrogen interactions with the steel microstructure. Current research mainly utilizes thermal desorption spectroscopy to study hydrogen-defect interactions, but this method alone is insufficient for a comprehensive understanding of hydrogen interactions with defects in the steel microstructure. Utilizing internal friction as a complementary technique may provide further insights into these interactions and the hydrogen embrittlement mechanism.
STEEL RESEARCH INTERNATIONAL
(2021)
Article
Chemistry, Physical
Yi Luo, Wei Li, Laizhu Jiang, Ning Zhong, Xuejun Jin
Summary: The susceptibility to hydrogen embrittlement and diffusion behavior of different steel types were evaluated, showing that QN1803 had higher austenite stability but increased hydrogen content due to small grain size and low activation energy, leading to microcrack formation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Zhengrong Zhou, Kaiyu Zhang, Yuanjian Hong, Haohao Zhu, Wanliang Zhang, Yanmin He, Chengshuang Zhou, Jinyang Zheng, Lin Zhang
Summary: The study revealed that heat treatment of selective laser melted (SLM) 304L stainless steel affects its hydrogen embrittlement susceptibility, with higher temperatures leading to more severe hydrogen embrittlement effects. Dislocations are identified as the main cause of hydrogen embrittlement, and preexisting dislocations can impact hydrogen transport behavior during sample stretching.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Hye-Jin Kim, Myoung-Gyu Lee
Summary: The relationship between plastic deformation and hydrogen transport behavior in quenching and partitioning (Q&P) steel was investigated. The evolution of microstructure and hydrogen diffusion and trapping characteristics were characterized using experimental methods. The major findings include the decrease in retained austenite fraction, the increase in geometrically necessary dislocation density, the decrease in hydrogen diffusivity, and the increase in solubility with increasing plastic deformation. The enhanced hydrogen trapping in the Q&P steel with plastic deformation was attributed to the increased dislocation density in ferrite and martensite. Experimental analysis using thermal desorption spectroscopy (TDS), electron backscatter diffraction (EBSD), and scanning transmission electron microscope (STEM) provided supporting evidence for hydrogen trapping characteristics and microstructure correlation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Rofiques Salehin, Gregory B. Thompson, Christopher R. Weinberger
Summary: This work systematically investigates the trapping and storage capabilities of transition metal carbides using density functional theory. It reveals a strong correlation between trap energy and valence electrons in the transition metal, and demonstrates that a lower carbon concentration leads to more hydrogen storage in transition metal carbides.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
M. Pinson, H. Springer, T. Depover, K. Verbeken
Summary: This study evaluates the interaction between hydrogen and hypereutectoid martensitic Fe-1.1C alloy, showing that the presence of H leads to additional cracking and affects the decomposition temperature of retained austenite.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Jie Zhang, Xiaoyang Chen, MingJian Ding, Jiaqiang Chen, Ping Yu
Summary: This study enhances the compositional inhomogeneity of relaxor ferroelectric thin films to improve their dielectric temperature stability. The prepared films exhibit a relatively high dielectric constant and a very low variation ratio of dielectric constant over a wide temperature range.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xiaoyu Chen, Ranran Zhang, Hao Zou, Ling Li, Qiancheng Zhu, Wenming Zhang
Summary: Polyaniline-manganese dioxide composites exhibit high conductivity, long discharge platform, and stable circulation, and the specific capacity is increased by providing additional H+ ions to participate in the reaction.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xutao Huang, Yinping Chen, Jianjun Wang, Gang Lu, Wenxin Wang, Zan Yao, Sixin Zhao, Yujie Liu, Qian Li
Summary: This study aims to establish a novel approach to better understand and predict the behavior of materials with multi-scale lamellar microstructures. High-resolution reconstruction and collaborative characterization methods are used to accurately represent the microstructure. The mechanical properties of pearlite are investigated using crystal plasticity simulation and in-situ scanning electron microscopy tensile testing. The results validate the reliability of the novel strategy.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Cheng Chen, Fanchao Meng, Jun Song
Summary: This study systematically investigated the unfaulting mechanism of single-layer interstitial dislocation loops in irradiated L12-Ni3Al. The unfaulting routes of the loops were uncovered and the symmetry breaking during the unfaulting processes was further elucidated. A continuum model was formulated to analyze the energetics of the loops and predict the unfaulting threshold.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Darshan Bamney, Laurent Capolungo
Summary: This work investigates the formation of adjoining twin pairs (ATPs) at grain boundaries (GBs) in hexagonal close-packed (hcp) metals, focusing on the co-nucleation (CN) of pairs of deformation twins. A continuum defect mechanics model is proposed to study the energetic feasibility of CN of ATPs resulting from GB dislocation dissociation. The model reveals that CN is preferred over the nucleation of a single twin variant for low misorientation angle GBs. Further analysis considering GB character and twin system alignment suggests that CN events could be responsible for ATP formation even at low m' values.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Bing Han, Zhengqian Fu, Guoxiang Zhao, Xuefeng Chen, Genshui Wang, Fangfang Xu
Summary: This study investigates the behavior of electric-field induced antiferroelectric to ferroelectric (AFE-FE) phase transition and reveals the evolution of atomic displacement ordering as the cause for the transition behavior changing from sharp to diffuse. The novel semi-ordered configuration results from the competing interaction between long-range displacement modulation and compositional inhomogeneity, which leads to a diffuse AFE-FE transition while maintaining the switching field.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Akib Jabed, Golden Kumar
Summary: This study demonstrates that cryogenic rejuvenation promotes homogeneous-like flow and increases ductility in metallic glass samples. Conversely, annealing has the opposite effect, resulting in a smoother fracture surface.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xin Ji, Yan Chong, Satoshi Emura, Koichi Tsuchiya
Summary: A heterogeneous microstructure in Ti-15Mo-3Al alloy with heterogeneous distributions of Mo element and omega(iso) precipitates has achieved a four-fold increase in tensile ductility without a loss of tensile strength, by blocking the propagation of dislocation channels and preventing the formation of micro-cracks.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Amit Samanta, Prasanna Balaprakash, Sylvie Aubry, Brian K. Lin
Summary: This study proposes a combined large-scale first principles approach with machine learning and materials informatics to quickly explore the chemistry-composition space of advanced high strength steels (AHSS). The distribution of aluminum and manganese atoms in iron is systematically explored using first principles calculations to investigate low stacking fault energy configurations. The use of an automated machine learning tool, DeepHyper, speeds up the computational process. The study provides insights into the distribution of aluminum and manganese atoms in systems containing stacking faults and their effects on the equilibrium distribution.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Guowei Zhou, Yuanzhe Hu, Zizheng Cao, Myoung Gyu Lee, Dayong Li
Summary: In this work, a physics-constrained neural network is used to predict grain-level responses in FCC material by incorporating crystal plasticity theory. The key feature, shear strain rate of slip system, is identified based on crystal plasticity and incorporated into the loss function as physical constitutive equations. The introduction of physics constraints accelerates the convergence of the neural network model and improves prediction accuracy, especially for small-scale datasets. Transfer learning is performed to capture complex in-plane deformation of crystals with any initial orientations, including cyclic loading and arbitrary non-monotonic loading.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Pengfei Yang, Qichang Li, Zhongying Wang, Yuxiao Gao, Wei Jin, Weiping Xiao, Lei Wang, Fusheng Liu, Zexing Wu
Summary: In this study, the HER performance of Ru-based catalysts is significantly improved through the dual-doping strategy. The obtained catalyst exhibits excellent performance in alkaline freshwater and alkaline seawater, and can be stably operated in a self-assembled overall water splitting electrolyzer.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Ilias Bikmukhametov, Garritt J. Tucker, Gregory B. Thompson
Summary: Depositing a Ni-1at. % P film can facilitate the formation of multiple quintuple twin junctions, resulting in a five-fold twin structure and a pentagonal pyramid surface topology. The ability to control material structures offers opportunities for creating novel surface topologies, which can be used as arrays of field emitters or textured surfaces.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Zening Yang, Weiwei Sun, Zhengyu Sun, Mutian Zhang, Jin Yu, Yubin Wen
Summary: Multicomponent oxides (MCOs) have wide applications and accurately predicting their thermal expansion remains challenging. This study introduces an innovative attention-based deep learning model, which achieves improved performance by using two self-attention modules and demonstrates adaptability and interpretability.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Ze Liu, Cai Chen, Yuanxun Zhou, Lanting Zhang, Hong Wang
Summary: This study attempts to address the gap in cooling rates between thin film deposition and bulk metallic glass (BMG) casting by correlating the glass-forming range (GFR) determined from combinatorial materials chips (CMCs) with the glass-forming ability (GFA) of BMG. The results show that the full-width at half maximum (FWHM) of the first sharp diffraction peak (FSDP) is a good indicator of BMG GFA, and strong positive correlations between FWHM and the critical casting diameter (Dmax) are observed in various BMG systems. Furthermore, the Pearson correlation coefficients suggest possible similarities in the GFA natures of certain BMG pairs.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Mike Schneider, Jean-Philippe Couzinie, Amin Shalabi, Farhad Ibrahimkhel, Alberto Ferrari, Fritz Koermann, Guillaume Laplanche
Summary: This work aims to predict the microstructure of recrystallized medium and high-entropy alloys, particularly the density and thickness of annealing twins. Through experiments and simulations, a database is provided for twin boundary engineering in alloy development. The results also support existing theories and empirical relationships.
SCRIPTA MATERIALIA
(2024)