Article
Materials Science, Multidisciplinary
Karl Peter Davidson, Sarat Singamneni
Summary: This paper evaluates the machinability of laser melted duplex stainless steels through experimental analysis and compares them with wrought counterparts. The results indicate that laser melted samples have better machinability, suggesting a potential solution for machining difficulties in duplex stainless steels.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Aleksandr Sergeevich Fedorov, Andrey Igorevich Zhitenev, Darya Andreevna Strekalovskaya, Aleksandr Aleksandrovich Kur, Alexey Aleksandrovich Alkhimenko
Summary: The properties of duplex stainless steels are influenced by the ferrite-austenite ratio, secondary phases content, and contamination with non-metallic inclusions. A study showed that a quantitative analysis method based on selective etching and metallographic analysis provides more accurate results compared to traditional methods.
Article
Engineering, Manufacturing
Karl Peter Davidson, Guy Littlefair, Sarat Singamneni
Summary: This research investigates the use of selective laser melting to convert duplex stainless steels into ferritic forms for better machinability, showing promising results through experimental machining evaluations. Comparisons of metallographic and micro-hardness assessments of laser melted and wrought specimens suggest that this approach can alleviate machinability problems in duplex stainless-steel systems.
MATERIALS AND MANUFACTURING PROCESSES
(2022)
Article
Chemistry, Physical
So Aoki, Dirk L. Engelberg
Summary: The objective of this study was to investigate and visualize the initiation and propagation of crevice corrosion in grade 2205 duplex stainless steel by means of time-lapse imaging. The experiment created an artificial crevice by coupling transparent Poly-Methyl-Meth-Acrylate washer and disk with duplex stainless steel. Electrochemical monitoring was applied to obtain information about the nucleation and propagation characteristics. The study found that localized corrosion initiated close to the edge of the washer and propagated towards the crevice mouth, with different corrosion regions developing.
Article
Materials Science, Multidisciplinary
Vahid A. Hosseini, Kjell Hurtig, Daniel Gonzalez, James Oliver, Nicklas Folkeson, Mattias Thuvander, Kristina Lindgren, Leif Karlsson
Summary: The complex precipitation behavior of Cu-rich particles (CRPs) in continuously cooled and quench-aged super duplex stainless steel was investigated and simulated. Different precipitation patterns were observed based on cooling rates, with slow cooling leading to nonuniform multimodal CRP precipitation and spinodal decomposition, while fast cooling resulted in more uniform precipitation of CRPs. Cu depletion in the ferrite next to CRPs during growth was observed, indicating Cu diffusion to austenite. By comparing analysis from APT and simulation, the effective Cu diffusion coefficient during early-stage precipitation was found to be significantly higher than the Cu diffusion coefficient in ferrite. The study highlights the factors contributing to the complexity of CRP precipitation in duplex stainless steels, including the nonuniform distribution of Cu in ferrite, duplex structure, and partitioning of alloying elements among phases.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Argelia Fabiola Miranda-Perez, Bryan Ramiro Rodriguez-Vargas, Irene Calliari, Luca Pezzato
Summary: The hydrocarbon industry needs a better understanding of stainless-steel welding metallurgy, particularly in the gas metal arc welding (GMAW) process. Corrosion is a significant issue in welding, and this study found that the corrosion properties of duplex stainless steels are strongly influenced by the heat input during welding. The best corrosion properties were observed with higher heat input.
Article
Engineering, Mechanical
Mohamed Azzam, Waleed Khalifa
Summary: In this study, a 6-inch diameter 2205 duplex stainless-steel gas flowline experienced leaks at two joints after two years of service. The leaks were mainly concentrated in the areas in contact with high salinity water, with minimal damage in the parts exposed to dry gases. The main causes of corrosion were identified as high salinity water and high carbon dioxide levels, with excessive heat input and low nitrogen levels also affecting the corrosion resistance of the joints.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Nanoscience & Nanotechnology
Yongjian Fang, Min-Kyeom Kim, Yali Zhang, Taehwan Kim, Jonghwan No, Jonghwan Suhr
Summary: The employment of grain refinement approaches, such as laser powder bed fusion (LPBF) and subsequent quenching process, has been successfully developed to increase the mechanical properties of duplex stainless steels (DSSs). This study provides a groundwork for designing grain refinement methods to produce high-performance DSS parts with complex geometry based on LPBF technique.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Ashwani Kumar, Bhagyaraj Jayabalan, Chetan Singh, Jayant Jain, Subrata Mukherjee, Krishanu Biswas, Sudhanshu S. Singh
Summary: In this study, yttria and lanthana based oxide dispersion strengthened duplex stainless steels were synthesized and their density, microstructure, and mechanical properties were investigated. The results showed that lanthana based duplex stainless steels exhibited better mechanical properties at room temperature.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Jiantao Zhang, Haokai Dong, Xiaoying Xi, Hao Tang, Xingyi Li, Jeremy Heng Rao, Zhiyu Xiao
Summary: In this study, a high density of coreshell structured nano-inclusions with an oxide core and a TiN shell was successfully obtained in an S2205 DSS through the use of selective laser melting (SLM) and minor Ti addition. These nano-inclusions not only refine the microstructure by inhibiting the motion of austenite/ferrite interfaces upon post-SLM annealing, but also contribute to a significant precipitation strengthening increment. The resulting nano-inclusions strengthened DSS exhibits excellent mechanical performance and non-deteriorative corrosion resistance, surpassing most reported 2205 DSSs.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Dong-Cho Kim, Tomo Ogura, Ryosuke Hamada, Shotaro Yamashita, Kazuyoshi Saida
Summary: In this study, the gamma phase dissolution behavior of different types of DSSs was predicted using the phase-field method to develop effective manufacturing strategies. The theoretical analysis revealed the relationship between the kinetic constant and temperature, improving correlation with experimental results. The experimental and kinetics-based theoretical results of this study could serve as a resource for predicting the gamma phase dissolution behavior of DSSs.
MATERIALS TODAY COMMUNICATIONS
(2021)
Review
Engineering, Manufacturing
Di Zhang, Aobo Liu, Bangzhao Yin, Peng Wen
Summary: Duplex stainless steels (DSSs) are promising materials in many fields due to their excellent corrosion resistance and mechanical properties resulted from their microstructure, which consists of roughly equal amounts of austenite and ferrite phases. Additive manufacturing (AM) has shown great advantages in fabricating metal parts with complex geometries, however, achieving expected formation quality and microstructure simultaneously remains a challenge. Delicate control of processing conditions is highly required based on understanding of DSS materials and AM processes in order to optimize the fabrication process.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Multidisciplinary
Christophe Mendibide, Carole Dessolin
Summary: The effect of test conditions on selective dissolution during sour testing was investigated on a cold-rolled duplex stainless steel. The results showed that selective dissolution competes with cracking and can hide the susceptibility of the material to cracking. The formation of selective dissolution is correlated to the instability of the passive film.
Review
Materials Science, Multidisciplinary
Roger Francis, Glenn Byrne
Summary: Duplex stainless steels, characterized by a microstructure of roughly equal proportions of austenite and ferrite, offer high strength, good corrosion resistance, and cost benefits compared to similar austenitic stainless steels. They can be used in various industries as a cost-effective solution in corrosive environments, and are expected to be a standard alloy for corrosion resistance in the 21st century.
Article
Materials Science, Multidisciplinary
Yunlong Wu, Jing Nong, Sui Yuan, Qi Guo, Jian Xu
Summary: This study investigated the acoustic emission behavior of a single pit evolution on two types of stainless steels using small-scaled electrodes, finding that there were dozens of AE signals observed during pitting on 17-4 PH, but much less acoustically emissive on 304 SS. In-situ optical observation revealed black flocculent clusters in 17-4 PH during pitting, while this process was weak in 304 SS. It was concluded that the formation of hydrogen bubble inside the pit and the perturbation of electrolyte around the pit created AE signals.
Article
Electrochemistry
Monica Trueba, Stefano P. Trasatti
ELECTROCHIMICA ACTA
(2018)
Article
Engineering, Mechanical
A. Colombo, L. Oldani, S. P. Trasatti
ENGINEERING FAILURE ANALYSIS
(2018)
Article
Materials Science, Multidisciplinary
M. Trueba, S. P. Trasatti
MATERIALS CHEMISTRY AND PHYSICS
(2018)
Review
Biochemistry & Molecular Biology
Stefania Marzorati, Luisella Verotta, Stefano P. Trasatti
Article
Materials Science, Multidisciplinary
Luigi D'Avico, Ruben Beltrami, Nora Lecis, Stefano P. Trasatti
Article
Materials Science, Multidisciplinary
Mohammad Sadegh Koochaki, Saied Nouri Khorasani, Rasoul Esmaeely Neisiany, Ali Ashrafi, Mirko Magni, Stefano P. Trasatti
MATERIALS RESEARCH EXPRESS
(2019)
Article
Materials Science, Multidisciplinary
Michael Nicoli, Francois Grosjean, Remy Mingant, Jean Kittel, Monica Trueba, Stefano Trasatti, Hubert Perrot, Francois Ropital
CORROSION ENGINEERING SCIENCE AND TECHNOLOGY
(2020)
Article
Engineering, Chemical
Mirko Magni, Ester Postiglione, Stefania Marzorati, Luisella Verotta, Stefano P. Trasatti
Article
Materials Science, Multidisciplinary
Luigi D'Avico, Ruben Beltrami, Eleonora Pargoletti, Stefano P. M. Trasatti, Giuseppe Cappelletti
Article
Materials Science, Multidisciplinary
Mohammad Sadegh Koochaki, Saied Nouri Khorasani, Rasoul Esmaeely Neisiany, Ali Ashrafi, Stefano P. Trasatti, Mirko Magni
Summary: A methodology was developed to enrich epoxy coatings with an effective self-healing feature on wet surfaces by chemically engineering polyetheramine and encapsulating it in microcapsules. The study confirmed the successful modification of polyetheramine by dopamine units and investigated the influence of dopamine grafting on the healing performance. The highly responsive self-healing coatings were prepared by embedding amine- and isocyanate-containing microcapsules as a dual-capsule system, and in operando electrochemical impedance spectroscopy tests were employed to study the underwater self-healing performance.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Masoud Atapour, Vahid Rajaei, Stefano Trasatti, Maria Pia Casaletto, Gian Luca Chiarello
Article
Polymer Science
Marco F. D'Elia, Mirko Magni, Thomas Romano, Stefano P. M. Trasatti, Markus Niederberger, Walter R. Caseri
Summary: This study investigates the corrosion resistance of Poly(phenylene methylene) (PPM)-based coatings on aluminum alloy and the effect of coating thickness on their performance. The results demonstrate that PPM copolymer exhibits superior corrosion resistance and self-healing ability compared to PPM blend.
Article
Biochemistry & Molecular Biology
Marco F. F. D'Elia, Mirko Magni, Stefano P. M. Trasatti, Markus Niederberger, Walter R. R. Caseri
Summary: This study aims to enhance the corrosion protection features of poly(phenylene methylene) (PPM) through sidechain engineering. The influence of side methoxy groups at different concentrations on the final polymer properties was investigated. Coatings made with co-PPM 9% showed the best protection performance and exhibited an intrinsic self-healing phenomenon.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Electrochemistry
Mirko Magni, Davide Sironi, Michele Ferri, Stefano Trasatti, Sebastiano Campisi, Antonella Gervasini, Maddalena Papacchini, Pierangela Cristiani
Summary: The study combines the excellent adsorption capacity of nanostructured hydroxyapatite (Hap) in heavy metal cations with the good electrical conductivity of high-surface carbon materials to fabricate high-content hydroxyapatite electrodes (Hap 84-96 wt.%). The electrodes demonstrate the synergistic capability of detection and adsorption of heavy metal cations in water solutions. A mesoporous carbon derived from bio-waste is used as a scaffold for depositing Hap by co-precipitation. The composite with 92 wt.% Hap shows superior sensitivity compared to low-content Hap electrodes reported in literature.
Article
Humanities, Multidisciplinary
Carolina Mori, Giorgia Ghiara, Paolo De Montis, Paolo Piccardo, Giacomo D. Gatta, Stefano Pierpaolo Trasatti
Summary: This study characterized two Venetian swords from the Luigi Marzoli Arms Museum in Brescia to understand their manufacturing process and gather information about their provenance. Analysis of the blades and hilts components revealed differences in metallurgical features, as well as unique manufacturing techniques such as hot forging and copper joints. Hypotheses about ironmaking processes and the origins of raw materials were obtained through inclusions, suggesting a combination of direct and indirect processes and a likely source of minerals from the mines of Brescia and Bergamo.
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)
