Article
Nanoscience & Nanotechnology
Dong Wang, Anette Brocks Hagen, Di Wan, Xu Lu, Roy Johnsen
Summary: The hydrogen effect on X65 carbon steel was studied, revealing minimal impact on elastic behavior but significant influence on dislocation nucleation and hardness, especially with a more pronounced effect on hardness in bainite.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Chandrahaasan K. Soundararajan, Dong Wang, Alexey Vinogradov
Summary: This study investigates the nanomechanical properties of Inconel 625 alloy under a hydrogen environment through in-situ electrochemical nanoindentation experiment. The hydrogen effect on various stages of the load-displacement plot is quantified, and it is found that hydrogen charging reduces the pop-in load and pop-in width, indicating hindered dislocation glide. The study also examines hydrogen-induced slip line formation and nanohardness variation using a diffusion-desorption model, and investigates the difference in plastic behavior between air and hydrogen environments through electron channeling contrast imaging.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Multidisciplinary
Jose Leal, Guilherme Martiniano, Marcelo Paes, Waldek Bose Filho, Vera Franco, Rosenda Arencibia, Sinesio Franco
Summary: The impact of hydrogen charging on nanohardness, elastic work, and plastic work was investigated using nanoindentation. Two high-strength low-alloy steels (AISI 4130 M and AISI 4137 M) were tested with different loading rates. Additionally, a continuous multicycle (CMC) indentation loading profile was employed to evaluate the effect of hydrogen embrittlement on AISI 4130 M steel. The results showed that hydrogen charging had different effects on the mechanical properties of the steels, with AISI 4137 M steel experiencing a reduction in elastic work and an increase in nanohardness, while AISI 4130 M steel exhibited an increase in elastic work. The CMC indentation tests demonstrated that both nanohardness and elastic work were affected, indicating hydrogen-induced softening due to the shielding of elastic fields.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2023)
Article
Chemistry, Physical
Marcin Moneta, Jerzy Stodolny, Beata Michalkiewicz, Rafal Jan Wrobel
Summary: Surface roughness is crucial in the nitriding process of treated parts. Eight samples of 42CrMo4 steel were used to investigate the Ra parameter. Innovative combined microhardness profiles were used to present results within the compound zone and diffusion layer. No distinct correlations between compound zone morphology and the Ra parameter were observed, but a dependence between the Ra parameter and diffusion layer thickness was found. A distinct nitrided layer was observed on the polished sample.
Article
Materials Science, Coatings & Films
Jiaqin Liu, Xiaofang Wang, Yin Hu, Lizhu Luo, Chunli Jiang, Fan Liu, Wei Jin, Kangwei Zhu, Zhong Long, Kezhao Liu
Summary: Surface modification technologies have been used to improve the mechanical properties of Ti and its alloys. In this study, the influence of different H2/(N2 + H2) ratio on the microstructure of Ti specimens nitrided by cathodic cage plasma nitriding (CCPN) was investigated. It was found that the compound layer thickness and surface hardness increased with the introduction of H2, but the tensile properties were deteriorated due to the generation of titanium hydride during nitriding process.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Luiz Henrique Portela de Abreu, Muhammad Naeem, Renan Matos Moncao, Thercio H. C. Costa, Juan C. Diaz-Guillen, Javed Iqbal, Romulo Ribeiro Magalhaes Sousa
Summary: This study combines conventional plasma nitriding and cathodic cage plasma deposition to enhance the surface properties of AISI-M2 steel. The combination effectively improves surface hardness and creates a favorable hardness gradient towards the core, benefiting load-bearing capacity. Duplex-treated samples exhibit iron nitrides and titanium nitride phases. The wear rate and friction coefficient are significantly reduced, and oxidative wear and adhesive wear mechanisms dominate.
Article
Crystallography
Heng Ma, Huiyun Tian, Zhongxue Wang, Kang He, Yuexiang Wang, Qingpu Zhang, Deyun Liu, Zhongyu Cui
Summary: The effect of charging conditions on hydrogen damage to Q690 steel is studied through electrochemical hydrogen charging, microstructure observation, and slow strain rate tensile tests. The charging current density and time have a significant impact on hydrogen-induced blistering, cracking behavior, and mechanical properties of the steel. The results show that the charging conditions affect the characteristics of hydrogen-induced blistering and the morphology, number, size, and location of internal cracks. Higher hydrogen concentrations lead to deeper cracks. High current density is responsible for the initiation of blisters. Excessive hydrogen pressure causes internal cracks, leading to the degradation of mechanical properties and the transition from ductile fracture to brittle fracture.
Article
Materials Science, Multidisciplinary
Zhengyi Xu, Pengyuan Zhang, Bo Zhang, Bing Lei, Zhiyuan Feng, Junyi Wang, Yawei Shao, Guozhe Meng, Yanqiu Wang, Fuhui Wang
Summary: Hydrogen embrittlement is a serious issue caused by hydrogen atoms, leading to severe ductility deterioration in engineering materials. Low levels of dissolved oxygen in deep-sea environments facilitate hydrogen production. In this study, the hydrogen permeation behavior in X70 pipeline steel under different hydrostatic pressure in acid/alkaline environments was examined using electrochemical methods. The results showed that hydrostatic pressure has an impact on the hydrogen permeation process through its effects on hydrogen generation, absorption/desorption, and permeation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Jiuyi Li, Xiankang Zhong, Tianguan Wang, Tan Shang, Junying Hu, Zhi Zhang, Dezhi Zeng, Duo Hou, Taihe Shi
Summary: The synergistic effect of erosion and hydrogen on the passive film of 2205 duplex stainless steel was studied in a loop system coupled with a hydrogen-charging cell. It was found that the combination of erosion and hydrogen could dramatically change the passive film component, decrease the protective performance, and increase the susceptibility of pitting corrosion of 2205 stainless steel in Cl-containing environment.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Chang Du, Jin Zhang, Yong Lian, Xiaoyun Ding
Summary: Two types of nitrided layers with different nitride precipitates were prepared on the surface of GX-8 steel by salt bath nitriding. The influence of nitrides on the thermal fatigue properties of the two nitrided layers was evaluated by microstructure analysis and cyclic thermal fatigue test. It was found that the nitrided surface with a compound layer composed of epsilon-Fe2-3N phase and strip-shaped CrN exhibited more cracks and spalling compared to the nitrided layer with nanoscale nitrides, which was attributed to the tessellated stress caused by different thermal expansion coefficients.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Tao Wang, Xueyang Fang, Wenjie Lv, Huiyun Zhang, Yi Luo, Liuwei Zheng, Wei Liang
Summary: This study characterizes the change of fracture morphology and microstructure of hot-rolled AISI430 ferritic stainless steels (FSSs) specimens after traditional electrochemical hydrogen charging and annealing at different temperatures (720 degrees C-1060 degrees C) using scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) technology. The influence of annealing temperature on hydrogen embrittlement sensitivity, hydrogen-induced mechanical property changes, and the transformation of microstructure on hydrogen-induced fracture mode were systematically illustrated. The results show that the hydrogen embrittlement susceptibility of FSSs increases significantly from the alpha single-phase region to the alpha+beta dual-phase region. The presence of intergranular carbides in the annealed specimens in the alpha single-phase region leads to high plasticity and improved yield strength after hydrogen charging, attributed to the change of the strain field around the intergranular carbide by hydrogen. The formation of crack holes in the annealed specimens in the alpha single-phase zone and the formation of quasi-cleavage (QC) + cleavage fracture (C) morphology in the annealed specimens in alpha+beta dual-phase zone are the result of the synergistic effect of hydrogen enhanced localized plasticity (HELP) and hydrogen enhanced decohesion (HEDE) mechanisms. Transgranular secondary cracks were observed near the fracture of the annealed specimen when the annealing temperature reached 940 degrees C.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Galina Melnikova, Tatyana Kuznetsova, Vasilina Lapitskaya, Agata Petrovskaya, Sergei Chizhik, Anna Zykova, Vladimir Safonov, Sergei Aizikovich, Evgeniy Sadyrin, Weifu Sun, Stanislav Yakovin
Summary: This paper focuses on the identification of microstructural, nanomechanical, and tribological properties of thin films of tantalum and its compounds deposited on stainless steel substrates by direct current magnetron sputtering. The coatings were found to be homogeneous with low roughness values, and the elastic modulus remained unchanged while microhardness values increased with the incorporation of oxygen and nitrogen atoms. The deposition of coatings led to a decrease in coefficient of friction, potentially extending the service life of the final product.
Article
Chemistry, Physical
Pawel Kochmanski, Marcin Dlugozima, Jolanta Baranowska
Summary: Nanoflex stainless steel is a promising material for medical applications. The nitriding process can improve its mechanical properties and wear resistance while maintaining good corrosion resistance. The study found that nitriding should be carried out at a suitable ammonia content and temperature to avoid nitride precipitation.
Article
Materials Science, Multidisciplinary
Weiguo Li, Qingjun Zhou, Weijie Wu, Yaxing Tong, Jinxu Li
Summary: In this study, the effect of segregation bands on the hydrogen embrittlement susceptibility of QP1180 was investigated. It was found that almost all hydrogen-induced cracks originated from the segregation bands, leading to fracture. The hydrogen distribution of QP1180 was also visualized, with the highest concentration found in the segregation bands, followed by the retained austenite, prior austenite grain boundaries, block boundaries, martensite, and ferrite.
Article
Materials Science, Multidisciplinary
Meysam Ranjbar, Reza Miresmaeili, Mohammad Reza Naimi-Jamal, Majid Mirzaei
Summary: This study investigated the influence of hydrogen on the mechanical properties and fracture toughness of API X65 pipeline steel with different microstructures. Results showed that the presence of hydrogen led to decreased elongation, reduction of area, ductile fracture percentage, and fracture toughness in all microstructures. Different microstructures exhibited varying levels of decrease in mechanical properties under hydrogen influence, with martensite + bainite + ferrite microstructure showing the highest decrement and ferrite + degenerated perlite + martensite-austenite microconstituent microstructure showing the least decrease.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Gaute Stenerud, Roy Johnsen, Jim Stian Olsen, Jianying He, Afrooz Barnoush
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2017)
Article
Multidisciplinary Sciences
T. Hajilou, Y. Deng, N. Kheradmand, A. Barnoush
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2017)
Article
Multidisciplinary Sciences
Yun Deng, Tarlan Hajilou, Afrooz Barnoush
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2017)
Article
Materials Science, Multidisciplinary
Yun Deng, Afrooz Barnoush
Article
Materials Science, Multidisciplinary
Bjorn Rune Soras Rogne, Nousha Kheradmand, Yun Deng, Afrooz Barnoush
Article
Chemistry, Physical
Hans Husby, Mariano Iannuzzi, Roy Johnsen, Mariano Kappes, Afrooz Barnoush
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2018)
Article
Nanoscience & Nanotechnology
M. Zamanzade, G. Hasemann, C. Motz, M. Krueger, A. Barnoush
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2018)
Article
Nanoscience & Nanotechnology
Di Wan, Yun Deng, Afrooz Barnoush
SCRIPTA MATERIALIA
(2018)
Article
Materials Science, Multidisciplinary
Dong Wang, Xu Lu, Yun Deng, Xiaofei Guo, Afrooz Barnoush
Article
Chemistry, Physical
Di Wan, Antonio Alvaro, Vigdis Olden, Afrooz Barnoush
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Article
Materials Science, Multidisciplinary
Di Wan, Yun Deng, Jan Inge Hammer Meling, Antonio Alvaro, Afrooz Barnoush
Article
Chemistry, Physical
M. Ahmadzadeh, T. Shahrabi, M. Izadi, I. Mohammadi, S. M. Hoseinieh, A. Barnoush
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Materials Science, Multidisciplinary
Nousha Kheradmand, Bjorn Rune Rogne, Stephane Dumoulin, Yun Deng, Roy Johnsen, Afrooz Barnoush
Article
Materials Science, Multidisciplinary
X. Lu, D. Wang, D. Wan, Z. B. Zhang, N. Kheradmand, A. Barnoush
Article
Materials Science, Multidisciplinary
M. Asadipoor, J. Kadkhodapour, A. Anaraki, S. M. H. Sharifi, A. Ch. Darabi, A. Barnoush
Summary: The study evaluated the effect of hydrogen on the microdamage evolution of 1200M advanced high-strength steel through a combination of experimental and numerical approaches. The experimental results showed that the yield stress and ultimate tensile strength of the steel were slightly sensitive to hydrogen under different charging conditions, while tensile elongation was significantly affected. Post-mortem analysis of fracture surfaces revealed a simultaneous action of hydrogen-enhanced decohesion (HEDE) and hydrogen enhanced localized plasticity (HELP) mechanisms of hydrogen, depending on the local concentration of hydrogen.
METALS AND MATERIALS INTERNATIONAL
(2021)
