Article
Materials Science, Multidisciplinary
Anna Dobkowska, Boguslawa Adamczyk-Cieslak, Monika Chlewicka, Aleksandra Towarek, Aleksandra Zielinska, Milena Koralnik, Dariusz Kuc, Jaroslaw Mizera
Summary: This study aimed to elucidate the role of microstructural changes induced by extrusion in developing deformation methods for Mg-based alloys at ambient temperature. The significant microstructure refinement led to a decrease in corrosion resistance, mainly affected by the recrystallization stage during deformation, rather than grain size alone.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Ewa Ura-Binczyk
Summary: In this study, the effect of aging on the resistance to pitting corrosion of ultra-fine grained 7475 aluminum alloy was investigated. The results indicate that the pitting susceptibility of the alloy is influenced by the distribution of MgZn2 precipitates. Grain refinement increases localized attack, while aging improves overall corrosion resistance.
Article
Engineering, Civil
M. Ciemiorek, L. Morawinski, C. Jasinski, M. Orlowska, T. Chmielewski, L. Olejnik, M. Lewandowska
Summary: By selecting proper processing parameters, it is possible to maintain an ultrafine-grained microstructure during friction welding, resulting in good mechanical properties. Increasing heat input may lead to larger grain size but higher ductility, as well as improved corrosion resistance in the stir zone.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Jinbao Huang, Marshall Yang, Libin Wan, Keyong Tang, Hui Zhang, Jian Chen, James J. Noel, Ivan Barker, Haiping Zhang, Jesse Zhu
Summary: In recent years, powder coatings have gained more popularity in the liquid coatings market due to their economic, ecological, environmental, and energy-saving benefits. However, their low surface qualities limit their wider application. This study focuses on the comparison between ultrafine powder coatings (-22 μm) and coarse powder coatings (-35 μm) in terms of particles deposition, coating powder leveling, surface qualities, inner structures, and anti-corrosive properties. The results indicate that ultrafine particles exhibit better spray deposition and curing process, leading to lower surface roughness, higher gloss, fewer inner voids, and higher corrosion resistance. This study not only provides insights into the impact of particle size on coating film structure and properties but also promotes the use of powder coating technology in industries such as electronics and automotive.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Sandra Stangebye, Kunqing Ding, Yin Zhang, Eric Lang, Khalid Hattar, Ting Zhu, Josh Kacher, Olivier Pierron
Summary: Nanostructured metals show promise as radiation-tolerant materials due to the presence of a large volume fraction of grain boundaries. This study observes radiation damage absorption through stress-assisted grain boundary migration in ultrafine-grained gold thin films. The migration rate of grain boundaries is found to be significantly higher in unirradiated specimens, attributed to the presence of smaller grains. The experimental results also indicate a decrease in grain boundary mobility due to irradiation. This work suggests that an evolving network of migrating grain boundaries under stress can reduce the deleterious effects of radiation.
Article
Chemistry, Physical
Maria Zemkova, Peter Minarik, Eva Jablonska, Jozef Vesely, Jan Bohlen, Jiri Kubasek, Jan Lipov, Tomas Ruml, Vojtech Havlas, Robert Kral
Summary: This study investigates the use of Mg-3Y alloy as an alternative to the WE43 alloy. The results show that the omission of RE and Zr elements does not compromise the corrosion resistance and degradation rate of the W3 alloy compared to the WE43 alloy, while maintaining appropriate biocompatibility. It is also shown that the decrease in mechanical strength caused by the omission of RE and Zr can be compensated for by severe plastic deformation.
Article
Materials Science, Multidisciplinary
Y. T. Zhou, Y. N. Zan, Q. Z. Wang, B. L. Xiao, Z. Y. Ma, X. L. Ma
Summary: In this study, intergranular corrosion (IGC) in B4C-reinforced 6061Al composite was investigated, showing that IGC only occurred in Cu-containing samples. Artificial aging was found to decrease the resistance to IGC in the composite. Transmission electron microscopy (TEM) characterization revealed a continuous Cu-rich layer along the grain boundaries responsible for the IGC susceptibility of aged Cu-containing samples.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Masahiro Goto, Terutoshi Yakushiji, Sangshik Kim, Takaei Yamamoto, Seung Zeon Han
Summary: Fatigue-induced grain growth was observed in ultrafine-grained metals processed by severe plastic deformation technique, with slip bands serving as potential crack initiation sites. Different configurations of slip bands were commonly observed in UFG materials compared to conventional grain-sized materials. The study aimed to investigate the formation process of slip bands with various configurations in UFG high-purity copper based on microstructural evolution and surface morphology changes due to cyclic stressing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
M. Zhang, G. L. Shuai, Y. Q. Wang, Z. Li, D. T. Zhang, H. Z. Yu, L. Li
Summary: After ECAP treatment, Al-Fe alloy shows an increase in the number of pitting corrosion but a decrease in the size of pit corrosion, due to the fragmentation and uniform distribution of precipitated phases. The increase in grain boundary density and the reduction of precipitated phase aggregation also contribute to the decrease in intergranular corrosion. This study provides a new approach to improve the corrosion resistance of Al-Fe alloys by transforming the corrosion mode from local to uniform.
Article
Materials Science, Multidisciplinary
Hongxing Li, Si Gao, Yo Tomota, Seiichiro Ii, Nobuhiro Tsuji, Takahito Ohmura
Summary: This study investigates the motion of dislocations and their interactions with grain boundaries in ultrafine-grained IF steel under tensile and compressive conditions. Before macro-yielding, dislocations move towards grain boundaries and are absorbed, leading to a decrease in dislocation density; after macro-yielding, dislocations emit from grain boundaries, resulting in hardening effects and discontinuous yielding behavior.
Article
Metallurgy & Metallurgical Engineering
Shan Wan, Bo-kai Liao, Ze-hua Dong, Xing-peng Guo
Summary: Through field exposure tests and wetting-drying tests, ER sensors were found to be more suitable for atmospheric corrosion monitoring than EIS, as they could sensitively monitor thickness loss of Cu foil according to the Ohmic law, while EIS was more dependent on environmental humidity.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Chemistry, Physical
Pragnya Paramita Samal, Amuthan Dekshinamoorthy, Shivakami Arunachalam, Saranyan Vijayaraghavan, Sailaja Krishnamurty
Summary: The study demonstrates that free base Phthalocyanine coatings are superior corrosion inhibitors for copper surfaces in hydrochloric acid, showing a corrosion inhibition efficiency of 88%, compared to its metal counterparts. Experimental and theoretical studies reveal that the intrinsic binding ability and inter-molecular packing of free base Phthalocyanine contribute to its excellent corrosion inhibition efficiency.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Materials Science, Multidisciplinary
Xiaoyang Guo, Per Erik Vullum, Hilde J. Venvik
Summary: Combined NS-SPD and thermochemical treatment have been shown to enhance the metal dusting corrosion resistance of Incoloy 800 by increasing the effective diffusion coefficient for Cr in the alloy, leading to the formation of a highly protective oxide scale through the development of a high density of defects and ultra-fine-grained structure.
Article
Materials Science, Multidisciplinary
Ryan Schoell, Joey Kabel, Sebastian Lam, Amit Sharma, Johann Michler, Peter Hosemann, Djamel Kaoumi
Summary: The corrosion properties of multilayer and combinatorial physical vapor deposition metal coatings (Zr, Cr, and/or Ti) on a SiCf-SiC composite under simulated boiling water condition were investigated. The most suitable composition of coatings preventing further attack on the underlying SiCf-SiC was identified. Mass measurements, visual observations, and transmission electron microscopy were conducted to study the protective oxide formation and spalling of coatings.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Energy & Fuels
Siwat Linjee, Suphitcha Moonngam, Pitichon Klomjit, Namurata Sathirachinda Palsson, Chaiyasit Banjongprasert
Summary: This research focuses on the effects of alloying elements (Zn, In) and grain size reduction on the electrochemical behaviors of aluminium alloy anodes. The results show that zinc and indium can improve the stability and activation of ion dissolution, respectively, while grain size reduction can enhance the anode life in alkaline solution.
Article
Chemistry, Applied
Seyed Ali Mousavi, Sayed Hamid Hashemi, Ali Ashra, Reza Shoja Razavi, Seyyed Mehdi Ghazi Mirsaeed
Summary: A new Al-based amorphous alloy with excellent corrosion resistance and high thermal stability was produced in the Al-Co-RE (Ce-La) system. Two different amorphous-nanocrystalline ribbons, Al87.6-Co6.4-Ce3.8-La2.2 (M1) and Al82.3-Co10.1-Ce4.8-La2.8 (M2), were prepared using melt spinning. The M2 alloy showed higher thermal stability with a supercooled liquid region (DTx) of 218 degrees C. The M2 ribbons exhibited superior corrosion resistance due to the formation of an amorphous phase. The fully amorphous Al-Co-Ce-La metallic ribbons showed better anti-corrosion performance compared to other crystalline and amorphous aluminum alloys.
JOURNAL OF RARE EARTHS
(2023)
Article
Materials Science, Multidisciplinary
Hossein Taheri Barayjani, Mohammad Reza Toroghinejad, Ahmad Rezaeian, Ali Shabani, Philippe Bocher
Summary: This study investigated the effect of different accumulative roll bonding (ARB) process routes on the microstructure and mechanical properties of commercially pure copper strips. The results showed that higher bonding quality and a relatively equiaxed grain were achieved when the strips were processed in route B-C. However, the tensile strength increased in both routes as the ARB process proceeded. Additionally, the failure mode of the specimens changed from a ductile fracture to a shear-ductile fracture with shear dimples as the number of ARB cycles increased.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Alireza Bagheri, Ali Shabani, Mohammad Reza Toroghinejad, Aboozar Taherizadeh
Summary: In this study, a multilayered Brass/IFS/Brass composite was produced through cold roll bonding and annealing treatments were conducted at different temperatures. The effects of annealing temperature on microstructure, texture, anisotropy, formability, and mechanical properties were investigated. The results showed that annealing caused full recrystallization in Brass and IFS layers, leading to significant changes in the mechanical properties of the composite. The annealing process also resulted in decreased anisotropy, improved formability, decreased strength, increased elongation, and a shift from brittle to ductile fracture mode.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Electrochemistry
Maryam SafaviPour, Hamidreza Mokhtari, Mohammad Mahmoudi, Sajjad Fanaee, Zahra Ghasemi, Mahshid Kharaziha, Ali Ashrafi, Fathallah Karimzadeh
Summary: This work studied the effect of titania nanotubes and chitosan-58S bioactive glass coating on the physiochemical properties of titanium substrate. The results showed that the coating significantly improved the corrosion resistance and surface hardness of titanium substrate. This has important implications for biomedical applications.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Alireza Bagheri, Mohammad Reza Toroghinejad, Aboozar Taherizadeh, Mohammad Mahmoudi, Ali Shabani
Summary: In this research, a three-layered brass/IF steel/brass composite was produced through the cold roll bonding process. The mechanical properties and corrosion behavior of the composite were evaluated. The study found that the tensile strength of the composite increased through cold rolling, reaching values double that of the raw materials. However, the strength decreased with further thickness reduction. The decline in strength was attributed to dynamic recrystallization, especially at the interface of the brass layer. Additionally, the corrosion resistance of the composites improved compared to the initial IF steel sheet.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Mohammad Reza Toroghinejad, Hossein Pirmoradian, Ali Shabani
Summary: FeCrCoNiCu high entropy alloy was produced through mechanical alloying and spark plasma sintering processes. The alloy exhibited good mechanical properties, including low porosity and high ultimate strength.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Ali Shabani, Mohammad Reza Toroghinejad, Marieh Aminaei
Summary: The hot deformation behavior of FeCrCuMnNi high entropy alloy was studied through hot compression tests in the temperature range of 500-970 degrees C and strain rates of 0.1, 0.01, and 0.001 s-1 up to a strain of 0.6. An Arrhenius-type equation was used to evaluate the deformation behavior and propose a constitutive equation. The alloy exhibited typical hot deformation behavior with an activation energy of approximately 250 kJ/mol, mainly governed by Cu lattice diffusion. Discontinuous dynamic recrystallization (dDRX) was the main restoration phenomenon, with grain boundary sliding and dislocation sliding as the main active mechanisms. Processing maps based on energy efficiency (η) and flow instability (ξ) were plotted, revealing an instability region between 750 and 850 degrees C at different strain rates, which might be directly related to the formation of a hard sigma phase within this temperature range.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Amir Gheysarian, Ahmad Rezaeian, Mohammad Reza Toroghinejad
Summary: The microstructural and mechanical properties of CuCrFeNi2Mn2 alloy were investigated under different conditions. The alloy exhibited dendritic microstructure in as-cast state and had FCC structure. Homogenization at 1000 degrees C caused macrosegregation of Mn at grain boundaries, weakening the grain boundaries strength and reducing the strength and elongation of the alloy. Aging treatment, by forming manganese-containing precipitates, eliminated the accumulation of Mn at grain boundaries and improved the strength of the alloy.
Article
Chemistry, Physical
Seyyed Ali Sajadi, Mohammad Reza Toroghinejad, Ahmad Rezaeian, Gholam Reza Ebrahimi
Summary: In this study, the hot deformation and dynamic recrystallization behaviors of an annealed FeCrCuNi2Mn2 high-entropy alloy were investigated. The flow curves were evaluated and constitutive equations were established for the calculation of material constants and modeling of flow stress behavior. The results showed that the increase in deformation temperature and decrease in strain rate led to a decrease in dynamic recrystallization parameters, followed by an increase in recrystallized volume fraction and grain growth, resulting in a decrease in alloy hardness. The activation energy of hot deformation was determined to be 437 kJ/mol and a power equation was established between critical stress and strain and the Zener-Hollomon parameter.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Bahram Rahnama Falavarjani, Mohammad Reza Toroghinejad, Vahid Yousefi Mehr
Summary: A Cu matrix composite with carbon nano-tubes (CNTs) as reinforcement particles was successfully designed and produced using the accumulative roll bonding (ARB) process. Increasing the number of ARB cycles resulted in a uniform distribution of CNTs in the matrix. However, the addition of 1% CNTs led to weak bonding and decreased ultimate tensile strength (UTS). Microscopy observations showed agglomeration of CNTs between Cu layers, causing weak bonding in certain areas.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Amir Gheysarian, Ahmad Rezaeian, Mohammad Reza Toroghinejad
Summary: In this study, a central composite design of experiment was conducted to investigate the homogenizing treatment of low-cost CuCrFeNi2Mn0.5 alloy. The alloy was cast using the vacuum induction melting method and homogenized under different time/temperature conditions, according to the experimental design. A model was developed using Response Surface Methodology (RSM) to determine the relationship between homogenizing parameters and segregation ratio values. The results showed that the optimal homogenization conditions were heat treating at 1100°C for 17 hours, resulting in the best segregation ratio (SR=1).
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Mohammad Reza Toroghinejad, Saeed Taali, Hamed Asgari, Jerzy A. Szpunar
Summary: The effect of unidirectional accumulative roll bonding (UARB) and rotational ARB (RARB) on the microstructure, texture, and mechanical properties of AA1050 sheets was investigated. It was found that RARB processing can significantly reduce the grain size and suppress the evolution of low-angle grain boundaries to high-angle ones. Additionally, RARB processing introduced additional texture components.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Mahnoosh Shaarbaf, Mohammad Reza Toroghinejad, Ali Shafyei, Shahryar Asqardoust, Farideh Salimyanfard
Summary: The paper presents a study on a high-entropy alloy, NiCoCrFe, produced in a Vacuum Induction Melting furnace. The alloy is subjected to various strain rates using the Split Hopkinson Pressure Bar. Characterization of the alloy's flow behavior is done using the modified Johnson-Cook model. X-ray diffraction and EBSD analysis indicate that the alloy has a single-phase FCC crystal structure at different processing stages. The presence of twins at high strain rates confirms the occurrence of Twin-Induced Plasticity. The strain gradient in the sample leads to the production of geometrically necessary dislocations, resulting in strain hardening. Nano-twin bundles are observed in hat-shaped samples, preventing strain localization and making the alloy suitable for high-speed impact applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Mohammad Reza Toroghinejad, Saeed Taali, Hamed Asgari, Jerzy A. Szpunar
Summary: This study investigates the effects of strain path variation on the microstructure, texture, and mechanical properties of commercially pure Al sheets during accumulative roll bonding (ARB). The results show that increasing the number of cycles significantly improves the grain size and texture of CARB-processed aluminum sheets, leading to increased hardness and toughness.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Ali Shabani, Alireza Bagheri, Mohammad Reza Toroghinejad, Pasquale Cavaliere
Summary: Al/IF composite was produced through accumulative roll bonding. The IF layer fractured during the process and distributed within the Al matrix, forming specific microstructure and texture. The composite exhibited typical tensile behavior, with strength increasing and elongation decreasing. The increase in dislocation density and decrease in crystallite size were the main governing parameters of these variations.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
