Article
Materials Science, Multidisciplinary
Weijie Wu, Shenguang Liu, Weiguo Li, Jinxu Li
Summary: This study investigated the effects of microstructure on hydrogen embrittlement (HE) in 2205 DSS. It was found that the initiation of hydrogen-assisted microcracks often occurred at the austenite grain boundary, while the ferrite phase acted as the preferential crack propagation path. The narrower ferrite block and lower inter-connectivity between the ferrite blocks provided better HE resistance.
Article
Engineering, Mechanical
J. Rajaguru, N. Arunachalam
Summary: Poor machining characteristics of super duplex stainless steels (SDSS) lead to tensile residual stress which results in stress corrosion cracking (SCC) under hostile chloride conditions, impacting the service life. This study focused on the effects of machined surface integrity on the SCC of SDSS, finding that different immersion times led to new forms of cracks and localized corrosion. The presence of high density crack formation and transition pit/crack behavior in the microstructure analysis indicated the vulnerability of the ferrite phase to SCC.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Metallurgy & Metallurgical Engineering
Gen Ogita, Koki Matsumoto, Masahito Mochizuki, Yoshiki Mikami, Kazuhiro Ito
Summary: The microstructure of duplex stainless-steel weld metal has a significant impact on hydrogen-induced cracking behavior, with cracks typically occurring at the ferrite/austenite boundaries where hydrogen accumulates. Finite element simulation revealed that hydrogen concentration was highest at the ferrite/austenite boundaries, corresponding to crack locations.
ISIJ INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Haozheng J. Qu, Janelle P. Wharry
Summary: In this study, the correlation between grain orientation, grain boundaries, and hardening from TGCISCC propagation was investigated by nanoindentation mapping and scanning electron microscopy. The results showed that the hardness of individual grains does not control TGCISCC propagation, but localized strain hardening at the crack tip was observed.
Article
Materials Science, Multidisciplinary
Cem Ornek, Bilgehan M. Sesen, Mustafa K. Urgen
Summary: This paper investigates the mechanism of hydrogen-microstructure-strain interactions in a finely-grained 25Cr-7Ni super duplex stainless steel subjected to dynamic tensile loading. It reveals that hydrogen affects the properties of austenite and ferrite, leading to the occurrence of hydrogen-induced cracks, with the hydrogen absorption capacity of austenite playing a decisive role in hydrogen embrittlement susceptibility.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Materials Science, Coatings & Films
Jin Sung Park, Dong Min Cho, Seung Gab Hong, Sung Jin Kim
Summary: This study investigated the influence of gas composition in bright annealing reducing atmospheres on the surface and corrosion characteristics of super duplex stainless steel tubes. The findings showed that the addition of N-2 resulted in increased [N] pick up on the surface and decreased corrosion resistance. Additionally, annealing in 100% H-2 at 1100 degrees C led to the formation of cracks with phase transformation to e-martensite, affecting the corrosion resistance of the samples.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Kenichiro Eguchi, Timothy L. Burnett, Dirk L. Engelberg
Summary: EAC in heat-treated lean duplex stainless steel was observed through X-ray CT and cross-sectional microstructure analysis. Cracks mainly propagated along ferrite-ferrite boundaries, with crack arrest associated with ferrite-austenite grain boundaries. The sudden appearance of EAC was due to crack opening suppression by ductile austenite phase, with reduced EAC resistance attributed to hydrogen embrittlement effects.
Article
Materials Science, Multidisciplinary
Xiaopeng Xiao, Dianzhong Li, Yiyi Li, Shanping Lu
Summary: The formation of stress relaxation cracks under different tensile residual stresses and aging time in Super304H austenitic stainless steel weld metal was quantitatively investigated using the pre-compressed CT technique. The statistical results showed that intergranular cracks could occur within a certain period of time, and different carbides were the main causes of crack formation. Furthermore, the mechanism responsible for crack formation varied under different aging time conditions.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Hanji Park, Byungrok Moon, Younghoon Moon, Namhyun Kang
Summary: This study investigates the effect of weld microstructure on hydrogen stress cracking behavior in dissimilar gas-tungsten arc welds of DSS and carbon steel. It found that certain weld microstructures, harmless under normal conditions, had a negative impact in a hydrogen atmosphere leading to premature rupture of the weld. Hydrogen-enhanced strain-induced void (HESIV) and hydrogen-enhanced localised plasticity (HELP) mechanisms were identified as causing premature fracture in these welds.
Article
Engineering, Manufacturing
J. Rajaguru, Mrinal Dwivedi, S. Natarajan, Hariharan Krishnaswamy, N. Arunachalam
Summary: This study predicts the residual stress in the orthogonal cutting process of super duplex stainless steel (SDSS) using the Coupled Eulerian-Lagrangian (CEL) formulation. The numerical model was validated with experiments and it was found that the mechanical effect has a significant impact on the final residual stress state of the workpiece. The analysis of chip thickness showed the presence of both unstable and stable regions during cutting. Overall, the predicted results from the simulated model are in good agreement with the experimental findings, and they can help assess the service life of SDSS components under various processing conditions.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Multidisciplinary
M. Ragavendran, Anita Toppo, M. Vasudevan
Summary: This study evaluates the stress corrosion cracking (SCC) resistance of type 316LN stainless steel weld joints fabricated using advanced welding techniques. It is found that 316LN stainless steel exhibits improved SCC resistance. The solidification mode, secondary dendritic arm spacing (SDAS), and tensile residual stress distribution strongly influence the SCC resistance of the weld joints.
MATERIALS SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
R. Rajasekaran, A. K. Lakshminarayanan, M. Vasudevan, P. Vasantha Raja
Summary: The 316LN stainless steel weld joints fabricated using TIG and A-TIG welding techniques were evaluated for their mechanical properties and microstructural characteristics. The A-TIG joint exhibited larger grain size variations in the fusion zone due to slower cooling rate and reversed Marangoni convection effect. The SCC susceptibility of the TIG and A-TIG welded joints was lower, with increased crack growth rate, compared to the base metal. The A-TIG joint showed inferior SCC resistance compared to the TIG joint, attributed to the formation of large dendrites and higher grain size variations in the fusion zone. Both welded joints showed lower SCC resistance compared to the base metal.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Optics
Alireza Karimi, Arash Karimipour, Mohammad Akbari, Mohammad Mehdi Razzaghi, Mehdi Jamali Ghahderijani
Summary: In this study, laser welding of dissimilar A516 low carbon steel and duplex stainless steel was performed to investigate the influence of laser welding parameters on the mechanical properties and microstructure. The highest tensile strength of 500 MPa and 18% elongation were achieved with a laser power of 400 W, welding speed of 300 mm/min, and focal point. The microstructure of the fusion zone consisted of ferrite-austenite distribution from duplex stainless steel and fully martensitic structure from the A516 side.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Jin Sung Park, Jin Woo Lee, Sung Jin Kim
Summary: The study found that the weld metal in welded steel exhibits more severe localized corrosion damage, while the presence of weldment increases the susceptibility of steel to hydrogen-induced cracking.
Article
Materials Science, Multidisciplinary
Ulises Martin, David M. Bastidas
Summary: The chloride-induced stress corrosion cracking mechanism of UNS S32205 duplex stainless steel reinforcing bars in alkaline and carbonated solutions was studied. Electrochemical monitoring and mechanical properties testing were performed to evaluate the SCC behavior and understand the pit-to-crack mechanisms. Fractographic analysis revealed a transgranular (TG) SCC mechanism. HCO3- acidification enhanced anodic dissolution kinetics, resulting in a premature pit-to-crack transition and faster crack propagation rate in the carbonated solution compared to the alkaline solution.
Article
Engineering, Mechanical
F. Moebus, J. M. Pardal, C. A. dos Santos, S. S. M. Tavares, P. A. Louzada, C. Barbosa, D. S. dos Santos
ENGINEERING FAILURE ANALYSIS
(2017)
Article
Materials Science, Multidisciplinary
Rodrigo Bezerra Vasconcelos Camposa, Sergio Alvaro de Souza Camargo Junior, Mariana Coutinho Brum, Dilson Silva dos Santos
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2017)
Article
Chemistry, Physical
A. L. Cardenas, R. O. Silva, C. B. Eckstein, D. S. dos Santos
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2018)
Article
Oncology
Bernard Lamien, Helcio Rangel Barreto Orlande, Leonardo Antonio Bermeo Varon, Rodrigo Leite Queiroga Basto, Guillermo Enrique Elicabe, Dilson Silva dos Santos, Renato Machado Cotta
INTERNATIONAL JOURNAL OF HYPERTHERMIA
(2019)
Article
Materials Science, Multidisciplinary
Amanda Ventura Castilho, Dilson Silva dos Santos
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2019)
Article
Chemistry, Physical
J. S. Belo, S. C. Marques, A. Castilho, L. M. de Oliveira, R. A. Simao, D. S. dos Santos
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Multidisciplinary Sciences
Claudia C. R. Cruz, Nilton P. da Silva, Amanda Castilho, Viviane A. Favre-Nicolin, Claudio L. Cesar, Helcio R. B. Orlande, Dilson S. Dos Santos
SCIENTIFIC REPORTS
(2020)
Article
Materials Science, Multidisciplinary
Debora Lima Molter, Mario Augusto Lopes de Castro, Dilson Silva dos Santos
Summary: This paper investigates the hydrogen embrittlement of S13Cr supermartensitic stainless steel under various cathodic potentials through experimental procedures and numerical analyses. The study reveals hydrogen diffusion behavior, deep traps existence, and the impact of hydrogen embrittlement on ductility.
Article
Nanoscience & Nanotechnology
Sara Correa Marques, Amanda Ventura Castilho, Dilson S. dos Santos
Summary: The impact of alloy element concentration on hydrogen diffusivity and trapping for two high-entropy alloys was investigated, with the difference mainly attributed to the decrease in Cr and its strong interaction with hydrogen in solid solution. Comparisons with traditional steels as a function of Cr % further supported this analysis.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Jessica Dornelas Silva, Gisele Fernandes Chaves Macieira, Dilson Silva dos Santos, Leandro de Arruda Santos, Vicente Tadeu Lopes Buono
Summary: Ti52-xNi38Cu10Nbx alloys with Nb additions were produced and their phase constitution and morphology were investigated. The study demonstrated the importance of metastable phases and Nb content in the solidification sequence, phase distribution, and morphology of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
B. B. Freitas, L. R. O. Costa, T. A. A. dos Santos, D. S. dos Santos
Summary: The effect of hydrogen embrittlement on API 5L X70 steel was investigated. The results showed that the steel was able to solubilize hydrogen, reducing its impact on embrittlement.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jessica Dornelas Silva, Dilson Silva dos Santos, Leandro de Arruda Santos, Vicente Tadeu Lopes Buono
Summary: The solidification process of Ti52-xNi38Cu10Nbx alloys was evaluated using the CALPHAD method and microstructural analyses. TiNi, β-Nb/Ti, and Ti2Ni were observed as the phases. The TiNi phase acted as the matrix phase with similar Ti and Ni contents at different Nb levels. Enrichment of Ti content and depletion of Ni were expected during the solidification of the TiNi phase. The formation of Ti2Ni and β-Ti was related to the excess of Ti, while increasing Nb content hindered the formation of Ti2Ni and favored β-Ti formation. The TiNi/β-Nb eutectic was formed due to Ni depletion and Nb accumulation, and coherent ratios were obtained when Cu was considered as a substitute for Ni and Nb for Ti.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2023)
Proceedings Paper
Computer Science, Artificial Intelligence
Leonardo A. Bermeo Varon, Bruna R. Loiola, Luiz A. da Silva Abreu, Bernard Lamien, Nilton Pereira da Silva, Helcio R. B. Orlande, Dilson Silva dos Santos
XV MEDITERRANEAN CONFERENCE ON MEDICAL AND BIOLOGICAL ENGINEERING AND COMPUTING - MEDICON 2019
(2020)
Article
Materials Science, Multidisciplinary
Anderson de Farias Pereira, Sidnei Paciornik, Dilson Silva dos Santos, Paula Mendes Jardim
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2019)
Article
Physics, Applied
Catherine Gosselin, Dilson Santos, Jacques Huot
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2017)
