Article
Nanoscience & Nanotechnology
Zhenqiang Wang, Yongjie Zhang, Goro Miyamoto, Tadashi Furuhara
Summary: Abnormal nodular ferrite with vanadium carbide interphase precipitation was observed in a vanadium-microalloyed low carbon steel, characterized by high density of low-angle boundaries and faster growth rate compared to normal grain boundary ferrite, resulting in formation of multiple variants of VC interphase precipitation within a single NF.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Monserrat Sofia Lopez-Cornejo, Hector Javier Vergara-Hernandez, Sixtos Antonio Arreola-Villa, Octavio Vazquez-Gomez, Martin Herrejon-Escutia
Summary: A coupled thermal-microstructural simulation model was developed to estimate the thermal history in a eutectoid steel wire rod under continuous cooling and forced-convection, analyzing thermal histories at different cooling rates and approximating phase transformation with the JMAK kinetic model. Heat transfer coefficients and kinetic parameters were used to create a user-defined function for ANSYS Fluent(R) software, achieving good agreement between model results and experimental histories, and validating microstructural evolution through SEM and Vickers microhardness. Factors affecting undercooling and pearlite interlamellar spacing were found to be specimen diameter and air velocity.
Article
Crystallography
Fuming Yang, Peng Chen, Xiaowu Li
Summary: This study developed a high specific Young's modulus steel by introducing a large fraction of kappa-carbides into the steel matrix through the addition of high contents of carbon and aluminum. A divorced eutectoid transformation treatment was adopted to regulate the microstructure of kappa-carbides and improve the ductility of the steel. The results showed that the kappa-pearlite transformation and kappa-carbides precipitation mainly occurred in the early stage of slow cooling, while the spheroidization of kappa-carbides mainly occurred in the later stage. Lower cooling rates were found to result in better spheroidization effect of carbides.
Article
Materials Science, Multidisciplinary
Clodualdo Aranas, Fulvio Siciliano, Samuel Filgueiras Rodrigues, Jubert Pasco, Edson J. P. Miranda, John Joseph Jonas
Summary: This study analyzed the deformation behavior and thermodynamic aspects of four different steel grades, revealing that under hot deformation conditions, Nb microalloyed steels produce more ferrite than C-Mn steel, while X-80 steel yields less ferrite than X-70 steel. The concept of transformation softening was applied to explain the occurrence of dynamic transformation during hot torsion tests.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Mechanical
Arun Rajput, J. Ramkumar, K. Mondal
Summary: The study analyzes the cavitation behavior of steel samples with different microstructures, finding that pearlitic, tempered martensitic, and bainitic steels have higher cavitation erosion resistance compared to martensitic steel. Heat-treated steels show increased resistance against cavitation erosion, with the micro-mechanism of cavitation depending on the interaction of sound waves with microstructural constituents.
Article
Nanoscience & Nanotechnology
Xiangyun Zhang, Shiyun Liu, Kun Wang, Ling Yan, Jialong Wang, Qihang Xia, Hao Yu
Summary: By microalloying with V element, the yield strength of the low-carbon bainitic steel was increased, and the microstructure was refined. V element mainly exists in the matrix in the form of a solid solution, and its effect on phase transformation kinetics is to reduce the activation energy of bainite and promote its nucleation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Shaojie Lv, Hong-Hui Wu, Kaiyang Wang, Chaolei Zhang, Jiaming Zhu, Shuize Wang, Guilin Wu, Junheng Gao, Xu-Sheng Yang, Xinping Mao
Summary: In this study, the austenitic-pearlite transformation and its effects on microstructure evolution were investigated using a CALPHAD-based model. The results showed that the isothermal transformation temperature, cooling rate, and Mn content significantly influenced the pearlite transformation process, and the multi-component diffusion played a critical role in pearlite growth.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
A. N. Stashkov, E. A. Schapova, S. V. Afanasiev, L. A. Stashkova, A. P. Nichipuruk
Summary: Measurements of magnetic properties, microscopic and X-ray diffraction investigations were conducted on eutectoid steels with different pearlite morphologies after cold plastic deformation. The study revealed that the coercivity of the steel increases with elongation, while the remanence and maximum magnetic permeability decrease. The difference in coercivity between steels with different pearlite morphologies also increases with elongation. Additionally, the study calculated the magnetoelastic field based on magnetic incremental permeability and residual compressive stresses.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Francisco Romario de S. Machado, Joao C. Ferreira, Maria Veronica G. Rodrigues, Marcos Natan da S. Lima, Rodrigo de C. Paes Loureiro, Fulvio Siciliano, Eden S. Silva, Gedeon S. Reis, Regina C. de Sousa, Clodualdo Aranas, Hamilton F. Gomes de Abreu, Samuel Filgueiras Rodrigues
Summary: Thermo-mechanically controlled rolling is a technique used to produce steel strips and plates. This study investigates the formation of ferrite in the hot rolling process of API X80 steel through hot torsion simulations. The results confirmed the inevitable formation of ferrite above a certain temperature, which was facilitated by strain accumulation and an increased number of deformation passes.
Article
Nanoscience & Nanotechnology
Amir-Reza Kalantari, Abbas Zarei-Hanzaki, Hamid Reza Abedi, Seong-Jun Park, Jun Young Park
Summary: The capability of strain-induced transformations in a ferrite-based lightweight steel was assessed using the Gibbs energy model and detailed microstructural analyses. Deformation in a warm temperature regime led to the development of a banded structure, resulting in partitioning of the ferrite phase and shearing of the parent austenite. Simultaneous ferrite to austenite and austenite to ferrite transformations effectively released shear strain localization, leading to flow softening in flow curves. Bidirectional transformation capability was achieved through specified local elemental partitioning of Al and Mn, ensuring same levels of Gibbs energies for each constituent phase.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Acoustics
Arun Rajput, J. Ramkumar, K. Mondal
Summary: The study found that the cavitation erosion resistance of pearlitic steel increases with the fineness of the microstructure, with air-cooled and forced-air-cooled pearlitic steels performing better than furnace-cooled ones.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Metallurgy & Metallurgical Engineering
E. A. Schapova, A. N. Stashkov, S. Afanas'ev, A. P. Nichipuruk
Summary: It is found that the size and shape of cementite inclusions in eutectoid steel affect its magnetic properties, such as coercivity and remanence. Tensile plastic deformation increases coercivity, decreases remanence, and leads to the formation of an easy-plane magnetic texture.
PHYSICS OF METALS AND METALLOGRAPHY
(2021)
Article
Chemistry, Physical
Aneta Lukaszek-Solek, Tomasz Sleboda, Lukasz Lisiecki, Janusz Krawczyk
Summary: The paper presents the hot deformation behavior of 4130 steel and the optimization of its processing parameters. Compression tests were conducted at various temperatures and strain rates to analyze material behavior under different thermomechanical conditions. The flow-stress curves and processing maps obtained from the tests were discussed.
Article
Materials Science, Multidisciplinary
V. Mattos Ferreira, M. G. Mecozzi, R. H. Petrov, J. Sietsma
Summary: The austenitization of an initial pearlitic microstructure is simulated using the phase field model to understand the formation of White Etching Layer (WEL) in pearlitic railway steels. The simulations consider the resolution of cementite lamellae and the presence of pro-eutectoid ferrite. The growth kinetics and morphology of austenite obtained from simulations are compared with experimental observations.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Jeong Min Kim, Sokyun Hong, Kyung Jong Lee
Summary: The additivity rule is beneficial for understanding the interrelationship between the kinetics of isothermal and non-isothermal phase transformations. It has been found that if the reaction exponent is larger than 1.0, the isothermal kinetics can be derived from continuous cooling kinetics using the additivity rule. The research on austenite decomposition to pearlite transformation in eutectoid steel shows that the pearlite transformation is partially additive in the temperature range of 610 to 640 degrees C, but becomes non-additive at temperatures of 650 degrees C or above due to a change in the transformation mechanism.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
M. C. Taboada, M. R. Elizalde, D. Jorge-Badiola
JOURNAL OF MATERIALS SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
U. Mayo, N. Isasti, D. Jorge-Badiola, J. M. Rodriguez-Ibabe, P. Uranga
MATERIALS CHARACTERIZATION
(2019)
Editorial Material
Materials Science, Multidisciplinary
Pello Uranga, Jose Maria Rodriguez-Ibabe
Article
Nanoscience & Nanotechnology
U. Mayo, N. Isasti, J. M. Rodriguez-Ibabe, P. Uranga
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Article
History & Philosophy Of Science
Dana Jalobeanu, Oana Matei
Article
History & Philosophy Of Science
Doina-Cristina Rusu, Dana Jalobeanu
Article
History & Philosophy Of Science
Dana Jalobeanu
Article
History & Philosophy Of Science
Dana Jalobeanu
EARLY SCIENCE AND MEDICINE
(2020)
Article
Materials Science, Multidisciplinary
Unai Mayo, Nerea Isasti, Jose M. Rodriguez-Ibabe, Pello Uranga
Summary: This study investigates the microstructural features and mechanical behaviors of different ferrite populations in intercritically deformed steels, utilizing EBSD and nanoindentation techniques. It reveals that NDF grains are relatively softer, and interrupted tensile tests demonstrate the different evolution of grain boundaries and strain partitioning.
Article
Materials Science, Multidisciplinary
Jon Arruabarrena, Jose M. Rodriguez-Ibabe
Summary: The study indicates that the spheroidization and microstructure softening of cementite is affected by different initial microstructures and soft annealing temperatures. Fine pearlite and upper bainite are more prone to spheroidization, with a fault migration mechanism observed in the spheroidization process. The row-like disposition of cementite in upper bainite facilitates rapid dissolution and lamellae break-up during annealing.
Article
History & Philosophy Of Science
Dana Jalobeanu
Summary: This paper suggests that Francis Bacon's distinctive strategy of measuring Nature through the construction of perceptive instruments bridges the gap between his speculative philosophy and scientific investigations. By focusing on the development of these instruments, particularly in terms of orbs of virtue and perception, Bacon provides a complex and interesting top-down approach to understanding and measuring Nature.
EARLY SCIENCE AND MEDICINE
(2021)
Article
Engineering, Industrial
M. Vilanova, F. Garciandia, S. Sainz, D. Jorge-Badiola, T. Guraya, M. San Sebastian
Summary: This paper discusses the issue of cracking in Inconel 738LC superalloy during Laser Powder Bed Fusion manufacturing, and the significant reduction of these cracks through Hot Isostatic Pressing post-treatment. The research reveals a crack width limit of 6 microns, beyond which the HIP treatment is unable to heal the cracks.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
A. Skarlatos, A. Martinez-de-Guerenu, D. J. Badiola, I Lelidis
Summary: The experimental magnetic susceptibility curves of soft steel grades, such as IF and LC steels, can be explained using mean-field theory and universal scaling functions. The behavior near the coercive field can be approximated by a Lorentzian function, as confirmed by experimental data from IF and ELC steels subjected to isothermal annealing.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Cleiton Arlindo Martins, Geraldo Lucio de Faria, Unai Mayo, Nerea Isasti, Pello Uranga, Jose Maria Rodriguez-Ibabe, Altair Lucio de Souza, Jorge Adam Cleto Cohn, Marcelo Arantes Rebellato, Antonio Augusto Gorni
Summary: Obtaining high levels of mechanical properties in steels can be achieved by using special mechanical forming processes and alloying elements. This study demonstrates the production of a hot-rolled steel strip with a yield strength above 600 MPa by using niobium microalloyed HSLA steel with non-stoichiometric titanium. The results show that a refined microstructure and high yield strength can be achieved at coiling temperatures of 600-650 degrees C, due to the maximum precipitation of titanium carbide at this temperature.
Article
Philosophy
Dana Jalobeanu
REVUE ROUMAINE DE PHILOSOPHIE
(2020)
