Article
Materials Science, Multidisciplinary
Ju Li, Jiajiao Wei, Yunliang Shao, Mengjia Li, Xiaomei Yu, Jin You Zheng, Dehai Ping, Ke Hou, Zhipeng Chang, Feng Yang, Min Li, Songjie Li
Summary: The hydrogen embrittlement behaviors of two mining chain steels were investigated, and it was found that the fracture stress decreases linearly with increasing hydrogen content. The ratio of intergranular fracture area to quasi-cleavage area increases dramatically at the turning points.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Jisung Yoo, Min Chul Jo, Min Cheol Jo, Seongwoo Kim, Sang-Heon Kim, Jinkeun Oh, Seok Su Sohn, Sunghak Lee
Summary: The addition of Mo can reduce the effects of hydrogen embrittlement in 32MnB5 steel and improve its resistance by decreasing hydrogen diffusivity and changing crack propagation path. Experimental results show that the addition of Mo significantly reduces ductility loss in H-charged steel, indicating higher hydrogen embrittlement resistance.
Article
Materials Science, Multidisciplinary
Chao Hai, Yuetong Zhu, Endian Fan, Cuiwei Du, Xuequn Cheng, Xiaogang Li
Summary: The effects of microstructure and reversed austenite on the hydrogen embrittlement behavior of NiCrMoV/Nb high-strength steel were investigated. The quenching and tempering steel showed the highest resistance to hydrogen embrittlement due to its lower hydrogen diffusion and higher apparent hydrogen concentration. The presence of reversed austenite in the quenching, lamellarizing, and tempering steel increased its susceptibility to hydrogen embrittlement.
Article
Nanoscience & Nanotechnology
Zachary D. Harris, Kateryna Guiseva, John R. Scully, James T. Burns
Summary: The hydrogen environment-assisted cracking behavior of the MP98T alloy for marine fastener applications was evaluated in 0.6 M NaCl solution. Results showed that MP98T is resistant to HEAC at cathodic protection potentials and has reduced efficacy for hydrogen uptake compared to Monel K-500 under hydrogen overpotentials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
C. San Marchi, J. A. Ronevich, J. E. C. Sabisch, J. D. Sugar, D. L. Medlin, B. P. Somerday
Summary: Austenitic stainless steels are widely used in harsh environments, including high-pressure gaseous hydrogen service. The tensile ductility of these materials is sensitive to materials and environmental variables, leading to significant ductility loss when exposed to hydrogen. Internal hydrogen influences deformation characteristics, driving local damage accumulation and fracture.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Kaori Kawano-Miyata
Summary: This study evaluated the susceptibility of polycrystalline Ni-Fe-Cr austenitic alloys to hydrogen-assisted fracturing and characterized the dislocation structures affected by hydrogen. It was found that hydrogen transforms the configuration of the dislocations, leading to increased brittleness in the alloy. The hydrogen trapping energy was found to be dependent on the chemical composition of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Jaeseok Yoo, Hyoungjin An, Junghoon Lee, Kwang Hee Yun, Sourav Kr. Saha, Namhyun Kang
Summary: In situ slow-strain-rate testing (SSRT) was conducted to evaluate the cold crack sensitivity of multipass flux-cored arc weld metals, and the hydrogen embrittlement (HE) index was quantitatively measured. The highest HE index was observed for the high-strength weld metal under low heat input condition (L-91) and for the low-strength weld metal under high heat input condition (H-71). Transverse cold cracks were formed in the window-type restraint weld cracking test under the two welding conditions with high HE indices (L-91 and H-71). The HE index of the multipass weld metals, measured through in situ SSRT, was the most important parameter for simulating the cold cracking tendency of the window-type restraint weld cracking test.
MATERIALS CHARACTERIZATION
(2023)
Article
Engineering, Chemical
Zhishan Mi, Xiuru Fan, Tong Li, Li Yang, Hang Su, Weidong Cai, Shuangquan Li, Guoxin Zhang
Summary: In this study, the effect of alloying elements on the adsorption and dissociation behaviors of hydrogen molecules on the bcc-Fe (001) surface has been investigated. It was found that doping Cr and Mo atoms promotes the adsorption and dissociation of hydrogen molecules, while doping a small amount of Ni hinders the adsorption and dissociation. However, doping a higher amount of Ni is beneficial to the adsorption and dissociation. Therefore, the nickel content in Ni-Cr-Mo steel should be carefully controlled to improve its hydrogen embrittlement resistance.
Article
Chemistry, Physical
Dannisa R. Chalfoun, Mariano A. Kappes, Pablo Bruzzoni, Mariano Iannuzzi
Summary: Hydrogen permeation experiments were conducted on quenched and tempered low alloy steels with varying Ni contents at different temperatures. The results showed that increasing Ni concentration decreases the permeation coefficient, apparent diffusion coefficient, and hydrogen concentration on the charging surface. Additionally, the study calculated the hydrogen binding energy and trap density, and found that they are not clearly correlated with Ni content.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Masoud Moshtaghi, Mahdieh Safyari
Summary: The joint effect of temperature and strain rate on hydrogen embrittlement properties of martensitic steel was investigated. It was found that at 50 °C, the elongation loss initially increased and then decreased with decreasing strain rate. This study provides the first report that at low strain rates, the temperature can mitigate hydrogen embrittlement susceptibility by increasing hydrogen effusion to the material surface and releasing a significant amount of hydrogen before the yield point. At 25 °C, the elongation loss increased with decreasing strain rate, as hydrogen could interact with mobile dislocations at lower strain rates, eventually leading to hydrogen-induced fracture. Additionally, intergranular cracks were observed, which can be attributed to prior austenite grain boundaries acting as paths for hydrogen-induced cracking.
Article
Engineering, Mechanical
Serena Corsinovi, Linda Bacchi, Matteo Mastroianni, Nevio Bigollo, Renzo Valentini
Summary: The aim of this study is to investigate innovative microstructure typologies and heat treatments for the manufacturing of high-strength steel fasteners with reduced susceptibility to hydrogen embrittlement. The research evaluates the role of microstructure and notch tensile strength (RNTS) on the hydrogen embrittlement of fasteners used in automotive industry. High-strength steel fasteners, despite their mechanical performance, are historically prone to hydrogen embrittlement, which is characterized by its unpredictability and ability to cause brittle fractures.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Nanoscience & Nanotechnology
Junichiro Yamabe, Jean-Gabriel Sezgin, Kentaro Wada
Summary: The study found that hydrogen-induced ductility loss in two precipitation-hardened, martensitic stainless steels was more significant with higher hydrogen content or tensile strength. Lower hydrogen content and tensile strength resulted in quasi-cleavage fracture and significant plastic strain, suggesting that hydrogen-dislocation interaction contributed to the loss in ductility. Increase in either hydrogen content or tensile strength led to intergranular and cleavage surfaces being incorporated into the quasi-cleavage surface, attributed to hydrogen-induced reduction of cohesive strength. Subsequent impact tests at cryogenic temperatures confirmed this reduction, indicating underlying mechanisms responsible for the loss in ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
X. W. Zhou, C. Nowak, R. S. Skelton, M. E. Foster, J. A. Ronevich, C. San Marchi, R. B. Sills
Summary: Hydrogen reduces the stacking fault energy of Fe-Ni-Cr austenitic stainless steels, leading to decreased ductility, fatigue, and fracture properties when exposed to hydrogen environments.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Cheng Zhang, Yuqi Zhang, Jinmeng Hu, Zhou Wang, Jun Xue, Hua Yu, Cheng Zhang, Xiaodong Wang, Qiaochu Cai, Changji Wang, Tao Jiang, Shizhong Wei, Kunming Pan
Summary: The addition of molybdenum improves the high-temperature oxidation behavior of 3Cr3MoxNiW steel by reducing grain size and enhancing oxidation resistance.
Article
Materials Science, Multidisciplinary
Rodrigo Chales, Andreia de Souza Martins Cardoso, Pedro Soucasaux Pires Garcia, Hugo Ribeiro da Igreja, Brigida Bastos de Almeida, Leosdan Figueiredo Noris, Juan Manuel Pardal, Sergio Souto Maior Tavares, Maria Margareth da Silva
Summary: This study investigates the stress-strain behavior of maraging steels, focusing on SSRT tests conducted on maraging 300 and 350 steels under solution treatment and aged conditions. By conducting environmental tests and hydrogen diffusion analysis, it is found that the Voce model provides a more accurate description of the strain-hardening behavior compared to the Hollomon model. Additionally, through an analysis of the coefficient behavior and fractographic analysis, the study demonstrates that the Voce model can accurately describe the plastic deformation response of high-strength maraging 300 and 350 steels.
INTERNATIONAL JOURNAL OF FRACTURE
(2022)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)