Article
Energy & Fuels
Anderson Azevedo Agra, Anderson Nicolodi, Bruno Deves Flores, Ismael Vemdrame Flores, Guilherme Lizeiro Ruggio da Silva, Antonio Cezar Faria Vilela, Eduardo Osorio
Summary: The microstructure of coke plays a crucial role in its strength, but characterizing it in a representative way is a complex challenge due to the high heterogeneity of coke.
Article
Physics, Multidisciplinary
M. J. Welland, N. Ofori-Opoku
Summary: The method presented offers a simple, quantitative, and thermodynamically self-consistent way to capture density and pressure variations in continuum phase-change models. It demonstrates how the local state of homogeneous dilation can be described entirely by species concentration in an Eulerian formulation. By introducing a hyperelastic contribution to the thermodynamic potential, the lattice constraint is generalized to allow for composition, temperature, and phase-dependent specific volumes. Comparing results from the models implementing this paradigm to those with the lattice constraint offers insights into the composition and size-dependent equilibrium of a Ni-Cu nanoparticle in its melt and free dendritic growth.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
S. R. Das, T. Riaz, S. Shyamal, P. C. Chakraborti, P. Sahu
Summary: The study shows that different dislocation substructures have varying contributions to flow stress during tensile deformation of high-Mn steel. As strain increases, forest dislocations become more active while the population of mobile dislocations decreases.
Article
Materials Science, Multidisciplinary
Peng Peng, Anqiao Zhang, Jinmian Yue, Shengyuan Li, Wanchao Zheng, Li Lu
Summary: This study investigated the solidification of Sn-Ni peritectic alloys and found that the peritectic reaction rate is smaller than previous reports, with peritectic phase mainly growing through direct precipitation from the melt. Step growth of both Ni3Sn2 and Ni3Sn4 phases was observed, with the step thicknesses of both phases decreasing as solidification proceeds. Additionally, the normal growth velocity of Ni3Sn4 phase was found to increase with increasing cooling rate.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Christian Gawert, Ruediger Baehr
Summary: A new procedure for automatic measurement of SDAS from microscopic images is introduced and successfully applied to two hypoeutectic aluminum cast alloys, showing good agreement between automated and manually measured values. A decrease in computation time allowed for an increase in measurement density for characterizing microstructures.
Article
Green & Sustainable Science & Technology
Junnian Wu, Jiayi Lu, Rong Jin
Summary: This study investigates the optimization and quantification of evolution in an industrial symbiosis network, focusing on a typical iron and steel industrial symbiosis network. Results show that carbon metabolism has more development potential and redundancy, while iron metabolism is key and more efficient in the symbiosis network. The indicators used in the study are sensitive to symbiotic components and reveal an improved performance in carbon and iron metabolisms.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Materials Science, Multidisciplinary
Neeraj S. Karmarkar, Vikram Varadaraajan, Pravansu S. Mohanty, Sharan Kumar Nagendiran
Summary: This study presents a solid-state dissolution method to achieve high dissolved nitrogen content and negligible formation of precipitates in high nitrogen steel powder alloy, resulting in powders with desired mechanical properties.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Jingliang Wang, Rongtao Qian, Xiang Yang, Yong Zhong, Chengjia Shang
Summary: The effect of alloying element segregation on the microstructure and mechanical properties of an intercritically annealed quenching and partitioning steel was experimentally studied. The phase constitution of the segregation band and matrix was compared to elucidate the impact of Mn enrichment on phase transformation processes and the stability of retained austenite. Tensile specimens including and excluding the segregation band were prepared to reveal the influence of segregation on mechanical properties. The study provides direct evidence of the detrimental effect of Mn segregation on the strength and ductility of the studied quenching and partitioning steel.
Article
Materials Science, Multidisciplinary
Claudia Gorynski, Max Frei, Frank Einar Kruis, Markus Winterer
Summary: Using region-based convolutional neural networks (R-CNNs), this study presents a novel approach to accurately quantify various microstructural characteristics of polycrystalline microstructures, such as Feret diameter, axis length, area, circumference, dihedral angle, and coordination number. A two-step method is employed, involving a semi-automatic annotation tool for generating training data and a fully automated R-CNN for quantitative evaluation of images. The R-CNN performs well in evaluating grain size characteristics, even in images with low contrast, and can differentiate between uni- and bimodal grain size distributions on the sub-micron and nanoscale. The innovative solution makes grain size measuring more accessible, time-effective, less biased, consistent, and statistically more precise.
Article
Materials Science, Multidisciplinary
Habib Lebbal, Mohammed Chaib, Abdelkader Slimane, Djafar Ait Kaci, Noureddine Boualem
Summary: Introduced a resistance spot welding method using non-fusible terminal resistance welding technique, and studied the boundaries and impact on welded joint performance through controlling parameters such as current power, welding time, and sheet thickness.
Article
Acoustics
Monica Umana, Marina Calahorro, Valeria Eim, Carmen Rossello, Susana Simal
Summary: This research investigated the effects of ultrasound application on the microstructure of vegetables/fruits with different porosities, cell sizes, and patterns. The results showed that the effects of ultrasound application on cell size varied depending on the material characteristics, with no significant effect observed on the cells of the most porous material (eggplant), but significant effects observed on the cells of the apple samples with middle-high porosity and the largest cells.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Energy & Fuels
Jingjing Liu, Deqiang Cheng, Yunlong Li, Kai Zhao, Qiqi Kou
Summary: This study presents an integrated approach for quantitatively evaluating the influence of coal particle size distribution on gas diffusion coefficient. Laser particle analyzer and image analysis were used to measure the particle size distribution of 6 coal samples, and the average diameter and diffusion coefficient were calculated. The results indicate that the image method provides a more accurate and reliable particle size distribution, and considering the particle size distribution provides a more accurate reflection of the particle size characteristics of coal samples.
Article
Nanoscience & Nanotechnology
Zhifu Yao, Zhipeng Chen, Mingliang Ouyang, Xinren Chen, Mujin Yang, Zhou Li, Cuiping Wang, Tao Yang, Rongpei Shi, Zheng Zhong, Xingjun Liu
Summary: Stellite alloys are engineered to have desired microstructures in terms of carbide type, size, shape, and distribution for optimal hardness and wear resistance. Through image recognition technology and mathematical algorithms, the quantitative relationship between carbides and hardness is established. This work contributes to the development of Stellite alloys and provides insights into the CCH relationship of other cemented carbide alloys.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Ping Fan, Xinbao Liu, Jinye Peng, Lin Zhu, Kai Zhang
Summary: This study investigated the creep damage of 9Cr-1Mo steel using nonlinear Lamb waves, and found that the measured acoustic nonlinearity parameter is strongly dependent on the creep state. The hierarchical microstructure of 9Cr-1Mo steel evolves during creep. By applying analytical models and kinetics of microstructure evolution, the predominant component of acoustic nonlinearity during the creep process was successfully identified.
MATERIALS CHARACTERIZATION
(2021)
Article
Metallurgy & Metallurgical Engineering
Jitesh Kumar, Niraj Nayan, Rohit Kumar Gupta, M. Ramalingam Munisamy, Krishanu Biswas
Summary: High entropy alloys (HEAs) are a new type of alloy with unique properties and potential applications. This study investigates the microstructure and properties of an HEA containing a small amount of Al, and develops a novel processing method for manufacturing components using investment casting.
INTERNATIONAL JOURNAL OF METALCASTING
(2023)
