Article
Nanoscience & Nanotechnology
Matruprasad Rout, V. Murugabalaji
Summary: In this study, single-pass hot rolling was conducted on 304LN austenitic stainless steel at different initial sample temperatures. Tensile samples were prepared to investigate the variation in through-thickness tensile properties. The microstructure of the rolled samples was examined using the electron backscattered diffraction (EBSD) technique. Significant differences in ultimate tensile strength (UTS) were observed for the surface of samples rolled at 900 degrees C and 1100 degrees C, while the UTS values along the thickness direction did not differ much for samples rolled at 1000 degrees C. A significant deviation in total elongation was observed for the surface sample. Strain hardening exponent (n), strength coefficient (K), and strain hardening rate (theta) were considered to study the difference in tensile behavior. The through-thickness tensile properties were correlated to the microstructure and texture, which played an important role in the behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Bo Gao, Tao Xu, Li Wang, Yi Liu, Junliang Liu, Yaping Zhang, Yudong Sui, Wenwen Sun, Xuefei Chen, Xiaofeng Li, Lirong Xiao, Hao Zhou
Summary: The mechanical and electrochemical properties of AISI420 martensitic stainless steels tempered at different temperatures (200, 400, and 600 degrees C) were systematically investigated. It was found that tempering at 200 degrees C resulted in superior strength-ductility synergy.
Article
Materials Science, Multidisciplinary
Mathias Truschner, Alexander Janda, Sabine C. Bodner, Andreas Keplinger, Gregor Mori
Summary: The resistance to chloride-induced stress corrosion cracking was investigated on a high-strength CrNiMnMoN austenitic stainless steel in different states. The study found that improved resistance can be achieved by the formation of deformation-induced twins, and synchrotron X-ray diffraction measurements showed full austenite stability during all cold-drawing processes.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Zhongji Sun, Shao-Pu Tsai, Peter Konijnenberg, Ji-Yun Wang, Stefan Zaefferer
Summary: Most microstructure characterization tools are based on 2D observation, which is not sufficient to analyze the microstructures of metal parts fabricated by additive manufacturing (AM) due to their significant differences. Orientation microscopy-based electron backscatter diffraction (EBSD) is a quantitative technique for 2D microstructure characterization and can be extended to a powerful 3D characterization technique by combining with serial sectioning. In this study, a large-volume 3D EBSD system was used to analyze an AM-built 316L stainless steel sample, and unique tree-like grain morphologies and related textures were observed.
SCRIPTA MATERIALIA
(2024)
Article
Materials Science, Multidisciplinary
Shunsuke Sasaki, Tatsuro Katsumura
Summary: The low-temperature toughness of a 2205 duplex stainless steel produced through a thermo-mechanical control process is dependent on its microstructure. Compared to conventional processes, the thermo-mechanical control process results in finer austenite grains and higher toughness, effectively lowering the ductile-brittle transition temperature by 26 to 33 degrees Celsius. The fine austenite grains produced by the thermo-mechanical control process have been found to prevent crack initiation, improving the overall toughness of the stainless steel.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
A. E. Davis, X. Zeng, R. Thomas, J. R. Kennedy, J. Donoghue, A. Gholinia, P. B. Prangnell, J. Quinta da Fonseca
Summary: In this study, an experimental method was developed to measure the beta-phase texture in thermomechanically processed Ti64 alloy. The SEM-EBSD acquisition and processing parameters were systematically varied to optimize the measurement. The results showed that the beta-phase texture could be reliably measured with the optimized settings, but this approach does not provide morphological or spatially relevant microstructure data.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
C. R. Loayza, D. C. S. Cardoso, D. J. A. Borges, A. A. F. Castro, A. C. Bozzi, M. A. L. Dos Reis, E. M. Braga
Summary: Stainless-steel matrix composites reinforced by multi-walled carbon nanotubes were successfully prepared by arc welding. The chemical treatment of MWCNT significantly influenced the properties of the composite, including nanostructured reinforcement, increased microhardness, and reduced erosion rate. This research is of great importance for large-scale industries.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Andrei Rudskoi, Georgii Kodzhaspirov
Summary: The influence of strain accumulation schedule during hot rolling on the structure evolution and carbide transformations of Cr-Ni-Ti austenitic stainless steel under the thermomechanical control process (TMCP) was studied. Different strain accumulation schedules resulted in cellular, fragmented dislocation substructures and dynamically recrystallized (DRX) structures. The study found that the strain accumulation schedule, especially fractionality, significantly affected work-hardening and softening behavior. The role of the strain accumulation schedule on the fragmented substructures, DRX structures, carbide transformations, and their relationship with the mechanical properties of the steel were considered, incorporating recent ideas on large plastic strains.
Article
Materials Science, Multidisciplinary
S. Dourandish, M. Jahazi, G. R. Ebrahimi, L. Ebacher
Summary: This study investigated the thermodynamic and kinetic of eutectic phase formation in martensitic stainless steel ingots, revealing that forging temperature and solidification rate are the two most effective parameters influencing the volume fraction and morphology of the eutectic phase.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Igor Vysotskiy, Sergey Malopheyev, Ivan Zuiko, Sergey Mironov, Rustam Kaibyshev
Summary: This study focuses on the crystallographic aspects of laser-powder bed fusion of 17-4 PH martensitic steel. The crystallization process showed an epitaxial mechanism and resulted in a specific crystal structure relationship between ferrite and austenite. Grain-boundary austenite was found to have a relationship with adjacent ferrite grains. The phase transformation from austenite to martensite did not exhibit significant variant selection.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Yiqi Zhang, Fangjie Cheng, Shaojie Wu
Summary: The unbalanced phase ratio and adverse secondary austenite in wire arc additive manufactured duplex stainless steel were modified through post-manufacturing heat-treatment, significantly enhancing the pitting corrosion resistance and achieving a level comparable to hot-rolled 2205 duplex stainless steel. This improvement was attributed to a balanced phase ratio, absence of chromium nitride, decreased crystalline defect density, and recrystallization of austenite after heat treatment at 1300 degrees C.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Tong Wang, Dominic Phelan, David Wexler, Zhijun Qiu, Shaogang Cui, Matthew Franklin, Liangliang Guo, Huijun Li
Summary: This study investigates the solidification process of duplex stainless steel using an in-house build apparatus and methods such as high temperature confocal microscopy and differential thermal analysis. By comparing DTA signals and in-situ observations, the position of a solid-state phase transition was accurately determined. The research provides new insights into the solidification mechanism of duplex stainless steel and contributes to the improvement of solidification mechanisms and material production processes.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Milene Yumi Maeda, Motomichi Koyama, Hayato Nishimura, Osvaldo Mitsuyuki Cintho, Eiji Akiyama
Summary: Hydrogen has significant effects on the ductility loss and fracture behavior of nitrogen-doped duplex stainless steel, resulting in quasi-cleavage and intergranular fractures associated with transgranular austenite cracking and ferrite/austenite interface cracking, respectively. Deformation twinning in austenite and nitrogen-related solution hardening are crucial factors leading to brittle-like cracking.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Review
Materials Science, Multidisciplinary
L. Romero-Resendiz, M. El-Tahawy, T. Zhang, M. C. Rossi, D. M. Marulanda-Cardona, T. Yang, V. Amigo-Borras, Y. Huang, H. Mirzadeh, I. J. Beyerlein, J. C. Huang, T. G. Langdon, Y. T. Zhu
Summary: This paper reviews the microstructural aspects, properties, and processing-microstructure-properties relationship of heterostructured stainless steel (HS SS), and discusses the multi-disciplinary perspectives.
MATERIALS SCIENCE & ENGINEERING R-REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Tushar R. Dandekar, Amit Kumar, Rajesh K. Khatirkar, Deepak Kumar, Satyam Suwas
Summary: The effect of microstructure and texture on the evolution of mechanical properties during recrystallization in cold rolled UNS S32101 lean duplex stainless steel sheet was investigated. The results showed that the microstructure changed from lamellar to near globular as the annealing time increased. The crystallographic texture weakened after recrystallization, leading to a decrease in hardness and stored energy.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Mechanical
Raheem Elemuren, Richard Evitts, Ikechukwuka N. A. Oguocha, Glyn Kennell, Regan Gerspacher, Akindele G. Odeshi
TRIBOLOGY INTERNATIONAL
(2020)
Review
Materials Science, Multidisciplinary
Felipe M. F. Serafim, Wahab O. Alabi, Ikechukwuka N. A. Oguocha, Akindele G. Odeshi, Richard Evitts, Regan J. Gerspacher, Enyinnaya G. Ohaeri
Summary: The study found that UNS S31603 steel showed significant susceptibility to SCC in KCl solution, while the duplex steels exhibited considerable resistance. Examination of surfaces of failed specimens suggested a mixture of ductile and brittle fractures.
Article
Engineering, Chemical
Kasia McChesney, Michael Trask, Dakota Penner, Richard Evitts, Glyn Kennell, Ikechukwuka Oguocha, Akindele Odeshi
Summary: The study found that mid-range slurry concentrations require the highest protection current density in pipelines carrying potash slurry. Higher flow velocities demand higher protection current density, and lead to reaching maximum protection current density at lower slurry concentrations.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Reza Alaghmandfard, Dharmendra Chalasani, Akindele Odeshi, Mohsen Mohammadi
Summary: This study investigates the dynamic mechanical properties and deformation mechanisms of electron beam melted Ti-6Al-4V cylindrical rod at elevated and high strain rates. The results show that samples deformed at higher strain rates exhibit higher compressive strength and total strain. With the increase in strain rate, the microstructure becomes finer and there is an increase in the fragmentation of alpha-lamella.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
F. M. F. Serafim, I. N. A. Oguocha, A. G. Odeshi, R. Evitts, R. J. Gerspacher, E. G. Ohaeri, A. A. Tiamiyu, W. O. Alabi
Summary: The deformation behavior of selected stainless steels was evaluated at different strain rates, showing relatively constant total strain at fracture within a certain range of strain rates. However, a decrease in strain rate above a certain threshold resulted in lower strain. Each steel exhibited varying levels of strain rate sensitivity, with strain hardening rate and exponent increasing as strain rate decreased. Post-deformation microstructure evaluations showed different behaviors for different steels, with dimple diameter increasing and dimple density decreasing with higher strain rates.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Nanoscience & Nanotechnology
S. Dehgahi, R. Alaghmandfard, J. Tallon, A. Odeshi, M. Mohammadi
Summary: Maraging steel samples were additively manufactured and tested under dynamic impacts to study their behavior. The results showed that the fracture behavior of the samples varied at different strain rates, with adiabatic shear bands forming at high strain rates. Additionally, a constitutive model was developed to better understand the high strain rate behavior of the samples, showing good agreement with experimental results.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Composites
I. A. Abdulganiyu, I. N. A. Oguocha, A. G. Odeshi
Summary: The study found that carbon fiber reinforcement in phenolic resins significantly increased the flexural strength, but the flexural modulus decreased with the addition of SiC microfillers. The tendency for failure worsened at microfiller addition of >= 1.5 wt.%.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
S. Dehgahi, H. Pirgazi, M. Sanjari, R. Alaghmandfard, J. Tallon, A. Odeshi, L. Kestens, M. Mohammadi
Summary: The study investigated the dynamic mechanical behavior and texture evolution in maraging steels manufactured using LPBF at different strain rates. Results showed a strong strain rate dependence on the crystallographic texture in as-built samples, while strain rate had no significant effect on texture evolution in heat-treated samples.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
S. Dehgahi, H. Pirgazi, M. Sanjari, P. Seraj, A. Odeshi, L. A. Kestens, M. Mohammadi
Summary: Rod-shaped samples of maraging steel were fabricated using laser powder bed fusion technique in vertical and horizontal directions. The samples exhibited different mechanical properties under high strain rate conditions. Vertically built samples showed higher elongation, while horizontally built samples showed higher dynamic strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
S. Dehgahi, H. Pirgazi, M. Sanjari, P. Seraj, A. Odeshi, L. Kestens, M. Mohammadi
Summary: The deformation performance of laser powder bed fusion fabricated maraging steel samples was evaluated using the split Hopkinson torsion bar test. Results showed that the samples fractured under high strain rates and when deformed using a 12-degree twist angle. Texture weakening and grain fragmentation were observed with increasing strain rate. Simulation results based on empirically and semi-empirically models agreed well with experimental data.
MECHANICS OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Reza Alaghmandfard, Mostafa Mahdavi, Payam Seraj, Hadi Pirgazi, Dharmendra Chalasani, Babak Shalchi Amirkhiz, Leo Kestens, Akindele Odeshi, Steven Liang, Hamid Garmestani, Mohsen Mohammadi
Summary: Ti-6Al-4V cylindrical rods fabricated through the electron beam melting technique were subjected to compression loadings at different strain rates. The results showed that vertically built samples had superior strength and finer microstructure, which were confirmed by hardness measurements and texture analysis.
Article
Materials Science, Multidisciplinary
R. Alaghmandfard, P. Seraj, M. Sanjari, H. Pirgazi, C. Dharmendra, A. G. Odeshi, B. Shalchi Amirkhiz, M. Mohammadi
Summary: This study investigates the influence of strain rate on the microstructural and texture evolution, adiabatic shear band characterization, and deformation mechanism of electron beam melted Ti-6Al-4V cylindrical rods. The results show that increasing the strain rate leads to higher maximum stress and total strain in the alloy, as well as more severe deformation with higher dislocation density and intense shear strain localization.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
T. D. Truong, G. Asala, O. T. Ola, O. A. Ojo, A. G. Odeshi
Summary: The microstructural and damage evolution of laser-based directed energy deposition (DED) fabricated 18%Ni M350 maraging steel under dynamic impact loading are investigated. The influence of additive manufacturing (AM) processing parameters, including laser power, powder feed rate, and energy area density (EAD) are discussed. The test results reveal that materials processed with the lowest EAD parameters exhibit the greatest impact strength under dynamic impact loading for all directions. However, these materials are the most susceptible to the development of adiabatic shear bands leading to cracking and fracture.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Polymer Science
Ibraheem A. Abdulganiyu, Oluwasegun. E. Adesola, Ikechukwuka N. A. Oguocha, Akindele G. Odeshi
Summary: The dynamic impact properties of carbon-fiber-reinforced phenolic composites (CFRPCs) modified with microfillers were studied. It was found that the impact properties of HRJ-15881-based CFRPCs increased with SiC addition up to 1.5 wt.%, while those of SP-6877-based composites increased only up to 0.5 wt.%. At an impact momentum of 28 kg m/s, the impact properties of both types of composites increased up to 0.5 wt.% SiC addition. However, the addition of colloidal silica did not improve the dynamic impact properties of composites based on both phenolic resins at both impact momentums.
Article
Materials Science, Composites
Edison E. Haro, Akindele G. Odeshi, Santiago Castellanos, Xavier Sanchez, Lenin Abatta, Linker Criollo, Alejandra Alban, Jerzy A. Szpunar
Summary: Hybrid composites armors made of closed-cell aluminum foam were developed for ballistic protective plates. The addition of various micro and nano-fillers to the aluminum foam plates enhanced the ballistic response of the armors. The highest impact energy absorption capacity was achieved with the deposition of Kevlar micro-fibers, but resulted in plates with higher weight and thickness. Silica carbide powder, gamma alumina, and colloidal silica powder improved impact energy absorption capability with lower weight and thickness. Introduction of micro and nano-fillers coating on closed-cell aluminum foam improved the interfacial bonding between layers of the composites.
COMPOSITES PART C: OPEN ACCESS
(2023)