Article
Chemistry, Physical
Lucas Boehm, Christoph Hartmann, Ines Gilch, Anett Stoecker, Rudolf Kawalla, Xuefei Wei, Gerhard Hirt, Martin Heller, Sandra Korte-Kerzel, Nora Leuning, Kay Hameyer, Wolfram Volk
Summary: This study evaluates the impact of grain size on iron losses in non-oriented electrical steel sheets after the blanking process. The results show that increasing grain size leads to increased iron losses in 0.25 mm thick sheets, while iron losses decrease in 0.5 mm thick sheets, contrary to previous research. This can be explained by the interplay of dislocation annihilation and transgranular fracturing.
Article
Materials Science, Multidisciplinary
Qiang Ren, Zhiyuan Hu, Lin Cheng, Lifeng Zhang
Summary: The effect of rare earth elements (REMs) on the magnetic properties of non-oriented electrical steels was investigated. The addition of REMs resulted in the modification of inclusions and fine MnS, leading to changes in grain size and textures. The steel with 0.0006 wt% lanthanum exhibited the best combination of core loss and magnetic induction due to the optimization of these factors. However, excessive addition of REMs deteriorated the grain size and textures.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yulong Liu, Chengyi Zhu, Luoyi Huang, Xinyuan Chen, Guangqiang Li
Summary: The influence of inclusions and microstructure on magnetic properties in calcium-treated non-oriented silicon steels was investigated. It was found that the calcium treatment effectively modified the inclusions and reduced the core loss. The precipitation characteristics of certain inclusions were also modulated, resulting in changes in grain size and texture density.
Article
Chemistry, Multidisciplinary
Matteo Gaggiotti, Luciano Albini, Giulia Stornelli, Giulia Tiracorrendo, Luca Landi, Andrea Di Schino
Summary: This paper investigates the effect of rapid annealing on Non-Grain Oriented Electrical Steel (NGO) in terms of microstructure, mechanical properties, and magnetic properties. Ultra-Fast Heating (UFH) tests were conducted on NGO electrical steel samples to study the impact of heating power and strip speed on the microstructure. The results demonstrate that UFH can refine grain size and achieve comparable core losses to conventional NGO grades.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Ling-Zi An, Yin-ping Wang, Guo-Dong Wang, Hai-Tao Liu
Summary: The grain size before cold rolling has a significant impact on the microstructural, textural evolution, and magnetic properties of non-oriented silicon steel sheets. This study proposes a new method to achieve a large grain size before cold rolling by low-finishing-temperature hot rolling combined with batch annealing. The grain growth during batch annealing is found to occur through strain-induced boundary migration mechanism, which leads to the formation of in-grain shear bands that serve as nucleation sites for recrystallized grains. The resulting microstructure exhibits superior magnetic properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Stefan Zeisl, Nele Van Steenberge, Ronald Schnitzer
Summary: One class of maraging steels is strengthened by the precipitation of beta-NiAl and eta-Ni3Ti intermetallic phases during aging heat treatment. To establish a meaningful structure-property relationship, the individual precipitation strengthening effect of each phase needs to be determined. Atom probe tomography was utilized in this study to determine the spacing between precipitates and calculate the individual strength contribution of the beta and eta phases using a model for precipitate-dislocation interactions. The results showed that the combined precipitation strengthening effect of the beta and eta phases is close to 1000 MPa, and the relative strengthening effect of each phase is influenced by the Ti and Al concentration.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Metallurgy & Metallurgical Engineering
Qian Gao, Xian-hui Wang, Jun Li, Jian Gong, Bo Li
Summary: The laboratory prepared slab low-temperature reheating grain-oriented silicon steel, and conducted high-temperature annealing interruption tests. The study found that the increase in aluminum content resulted in smaller grain size and higher texture intensity. Aluminum was more significant in determining the onset secondary recrystallization temperature than the primary grain size, with the most suitable aluminum content identified as 0.025 wt.%.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2021)
Article
Physics, Applied
Xiaofan Sun, Cuiping Xu, Zheng Tang, Shulin Jiao, Zhangran Gao, Yanzhou Lu, Dong Li, Hong-Ling Cai, X. S. Wu
Summary: The study proposes a new method to calculate the charge contribution of conductance and eliminate conductance interference in the hysteresis loop, providing a new approach for studying the ferroelectric properties of high conductivity materials.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Cristiana dos Santos Nunes, Almir Silva Neto, Vinicius Augusto Quintao Miranda, Lucas Carlos Soares de Matos, Luciana Nascimento Oliveira Favarato, Daniel Leandro Rocco
Summary: The study investigated the dynamic losses of modern high-permeability grain-oriented electrical steel, finding that clearance during shear cutting and frequency of the applied magnetic field impact magnetic properties. Heat treatment can restore properties affected by mechanical deformation during cutting. Different clearances result in variations in losses, impacted by frequency and induction intensity.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Ling-Zi An, Yin -Ping Wang, Guo-Dong Wang, Hai -Tao Liu
Summary: Non-oriented electrical steels with Fe-0.9% Si-0.3% Al composition were produced using a two-stage cold rolling process. The final recrystallization texture and magnetic properties were heavily influenced by the rolling reduction schedule. Different levels of first cold rolling reduction resulted in variations in grain size and texture in the final annealed sheets. Compared to a one-stage cold rolling process, the two-stage process showed reduced gamma-fiber recrystallization texture and MnS precipitate. The optimal rolling reduction schedule and intermediate annealing process resulted in non-oriented silicon steel with the lowest core loss and highest magnetic induction.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Huasong Liu, Yannan Dong, Hongguang Zheng, Xiangchun Liu, Peng Lan, Haiyan Tang, Jiaquan Zhang
Summary: AlN precipitates are commonly used to pin austenite grain boundaries in high-temperature carburization of special gear steels. This study quantitatively examined the influence of Al and N content on grain size after carburization through pseudocarburizing experiments, finding that AlN precipitates play a key role in determining grain growth behavior. Models predicting austenite grain coarsening in carburization were constructed and validated with experimental data, showing accuracies of 92% and 75% for the two models, respectively.
Article
Materials Science, Multidisciplinary
Dong-Mei Chen, Zhen-Zhen An, Guo-Dong Wang, Hai-Tao Liu
Summary: This study investigates the effects of different hot rolling and coiling temperatures on the microstructural and textural evolution of low silicon steel, finding that under certain conditions, grain growth can be significantly promoted, leading to improved magnetic properties. This provides a promising method for designing the hot rolling process to coarsen grains.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Ceren Yilmaz, Marvin Poul, Ludger Lahn, Dierk Raabe, Stefan Zaefferer
Summary: This paper reviews the existing hypotheses on the formation of abnormal growth of Goss-oriented grains in grain-oriented electrical steel (GOES) and proposes a new hypothesis called Dislocation-assisted particle dissolution. Experimental and simulation results show that the abnormal growth of Goss-oriented grains is assisted by subgrain boundaries enriched with solute elements, and these boundaries play a crucial role in the grain growth. The understanding of these mechanisms is important for improving the production process of GOES.
Article
Chemistry, Physical
Xuefei Wei, Alexander Kraemer, Gerhard Hirt, Anett Stoecker, Rudolf Kawalla, Martin Heller, Sandra Korte-Kerzel, Lucas Boehm, Wolfram Volk, Nora Leuning, Kay Hameyer, Johannes Lohmar
Summary: This article focuses on the research of controlling the evolution of grain size and texture in non-oriented electrical steel in order to improve its magnetic properties. The study on a laboratory scale revealed that certain process parameters can influence the grain size, texture evolution, and magnetic properties of the material. Promising results show that controlling the processing on an industrial scale can tailor the magnetic properties of non-oriented electrical steel for specific applications.
Article
Engineering, Electrical & Electronic
Zhi Zhang, Hamed Hamzehbahmani, Philip H. Gaskell
Summary: A novel approach is developed to model the hysteresis phenomenon of grain-oriented electrical steels. The model is able to accurately replicate experimentally obtained dynamic hysteresis loops and evaluate the energy loss in the steels. There is a close agreement between the predicted energy loss and measured results.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
