Article
Nanoscience & Nanotechnology
Akinobu Shibata, Ivan Gutierrez-Urrutia, Kazuho Okada, Goro Miyamoto, Yazid Madi, Jacques Besson, Kaneaki Tsuzaki
Summary: The study investigated the relationship between the mechanical response and microscopic crack propagation behavior of hydrogen-related intergranular fractures in high-strength martensitic steel. The results showed that hydrogen can affect crack tip morphology and induce strain localization in the vicinity of intergranular cracks.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Guillermo Alvarez, Alfredo Zafra, Francisco Javier Belzunce, Cristina Rodriguez
Summary: This study analyzed the effect of internal hydrogen on the fatigue crack growth rate in the coarse grain region of a welded joint. It was found that internal hydrogen caused embrittlement and increased the fatigue crack growth rate, especially at low frequencies and high load ratios.
Article
Mechanics
Zhuang Chen, Diansen Yang, Hanbing Bian
Summary: This paper presents a peridynamic hydrogen embrittlement model that is capable of simulating hydrogen diffusion and hydrogen embrittlement phenomena. The effectiveness of the model is validated through numerical examples and compared to other models and experiments. The influence of hydrogen diffusion time steps and grain boundary diffusion coefficients on hydrogen-assisted crack propagation is also investigated.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Chemistry, Physical
Xiu Ran, Songrong Qian, Ji Zhou, Zhengyun Xu
Summary: We introduced a coupled peridynamic hydrogen diffusion and fracture model to solve the hydrogen embrittlement fracture of low alloy steel AISI 4340. The model considers the influence of temperature on hydrogen diffusion coefficient and uses a new peridynamic constitutive analysis method to simulate the crack propagation of hydrogen embrittlement. The model was verified through experimental tests and can numerically simulate the entire process of hydrogen atom diffusion and crack growth.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Shuo Weng, Yuhui Huang, Shuxian Lin, Fu-Zhen Xuan
Summary: The propagation behavior of stress corrosion cracking (SCC) for two specific steels in a simulated environment was systematically investigated. The results showed that the corrosion susceptibility and stress corrosion susceptibility increased with certain factors, such as localized residual strain, yield strength, and grain size.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Mechanics
Luis Borja Peral, Ines Fernandez-Pariente, Chiara Colombo
Summary: This study investigates the decohesion mechanism of CrMo steel in the presence of hydrogen. Experimental tests and numerical simulations are conducted to identify the critical hydrogen concentration that induces crack tip propagation.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
Chuansen Liu, Ji Liu, Changfeng Chen, Haobo Yu
Summary: The crack propagation mechanism of 316L austenitic stainless steel in H2S environment is revealed by dislocation configurations. Slow strain rate tensile test results indicate that fracture elongation decreases and increases with temperature, suggesting stress concentration in different positions due to dislocation configurations. The relationship between crack propagation, hydrogen embrittlement, and stress concentration is analyzed, proposing a mechanism for fracture morphology change with temperature.
Article
Materials Science, Multidisciplinary
Xu Li, Yue Sheng, Hongda Yang, Xiaoyu Jiang
Summary: This study investigates the propagation behavior of macrocracks and microcracks using Muskhelishvili's complex potential method and the equivalent crack method. The analysis shows that parallel distributed microcracks facilitate the propagation of macrocracks, while the closure effect may delay the propagation process of long cracks.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Chemistry, Physical
Xiao Xing, Jinxin Gou, Fengying Li, Yongcheng Zhang, Jie Cheng, Yaoyinqi Wang, Jianguo Liu, Gan Cui, Zili Li, Peifeng Zhang, Xiaoming Luo, Bingying Wang
Summary: The fracture strain of polycrystal alpha-iron was studied at different hydrogen concentrations and crystal sizes using molecular dynamics simulations. Increasing hydrogen concentration leads to decreased fracture resistance in fine crystal models compared to coarse grain models, indicating a shift in vulnerability areas in the welding heat-affected zone. The density of triple or multi-junctions of grain boundaries plays a crucial role in intergranular failure caused by hydrogen embrittlement.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Mechanical
Rebeca Fernandez-Sousa, Covadonga Betegon, Emilio Martinez-Paneda
Summary: In this study, we investigate the influence of microstructural traps on hydrogen-assisted fatigue crack growth. A new formulation combining multi-trap stress-assisted diffusion, mechanism-based strain gradient plasticity, and a hydrogen- and fatigue-dependent cohesive zone model is presented. The results show that the ratio of loading frequency to effective diffusivity governs fatigue crack growth behavior. Increasing the density of beneficial traps, not involved in the fracture process, results in lower fatigue crack growth rates. The study identifies the combinations of loading frequency and carbide trap densities that minimize embrittlement susceptibility, providing a foundation for the rational design of hydrogen-resistant alloys.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Multidisciplinary
Yong Li, Zhiyong Liu, Endian Fan, Yunhua Huang, Yi Fan, Bojie Zhao
Summary: The study investigated the stress corrosion cracking behavior of E690 steel base metal and different heat-affected zone microstructures under different cathodic potentials. The results show that fine grain HAZ has the lowest susceptibility to SCC, while coarse grain HAZ has the highest susceptibility. The findings suggest that the HAZ microstructures are more susceptible to hydrogen embrittlement than the base metal.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Shuang Liang, Minsheng Huang, Lv Zhao, Yaxin Zhu, Zhenhuan Li
Summary: Investigations on hydrogen-induced intergranular fracture in different metals were conducted through a multi-scale framework. Results indicated that the dominant hydrogen embrittlement mechanism in different metals depends on the grain boundary type, with twin boundaries exhibiting better resistance to hydrogen embrittlement.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Materials Science, Multidisciplinary
Buyu Zhang, Mark Asta, Lin-Wang Wang
Summary: A machine learning force field for Fe-H was developed to investigate hydrogen embrittlement. The simulations revealed that a high concentration of hydrogen enhances crack propagation, and the degree of enhancement depends on the type of grain boundaries. The formation of microvoids ahead of cracks was also observed, which may contribute to crack propagation.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Engineering, Multidisciplinary
Moirangthem Dinachandra, Alankar Alankar
Summary: An adaptive refinement scheme is proposed in this study to reduce the complexity and cost of computations in phase-field models, and the effectiveness of the method is successfully demonstrated.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Engineering, Industrial
C. DiGiovanni, A. Ghatei Kalashami, F. Goodwin, E. Biro, N. Y. Zhou
Summary: This study found that angular welding electrode misalignment in high strength steels used for automotive structural components can lead to liquid metal embrittlement (LME) cracking, especially in the sub-critical heat affected zone (SCHAZ) and low temperature regions. Only misalignment beyond 2 degrees promoted LME cracking, while a 2-degree misalignment showed statistically the same results as the standard case.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
