Article
Chemistry, Physical
Yuyang Hou, Guoguang Cheng, Kota Kadoi, Hiroshige Inoue
Summary: The formation of Ti2O3-TiN originates from the Ti-O-N particle, with Ti2O3 and TiN precipitating sequentially from it to constitute Ti2O3-TiN. Subsequently, the surface of the formed Ti2O3-TiN will promote delta-ferrite nucleation, contributing to suitable compositional design for equiaxed solidification.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Acoustics
Richard E. Jacob, Matthew S. Prowant, Chris A. Hutchinson
Summary: Ultrasonic inspection of cast austenitic stainless steel (CASS) in the nuclear industry is challenging due to sound field scatter and attenuation caused by the coarse-grained microstructure. Modeling and simulation are important tools for addressing key aspects of inspections, but developing a useful and reliable CASS model is challenging. This study demonstrates a method of creating a realistic CASS model and compares it with laboratory-measured sound fields, showing promising results.
Article
Nanoscience & Nanotechnology
Wenbo Liu, Zhe Liu, Wei Luo, Ding Zuo, Huiqun Liu, Ruiqian Zhang, Qing Wang
Summary: This study investigates the effects of coarse Laves phase on the recrystallization behavior of Fe-Cr-Al alloys. The results show that the presence of coarse Laves phases in the matrix leads to finer grains due to particle stimulated nucleation (PSN). Zr addition increases the proportion of coarse Laves phase, promoting PSN and resulting in a fine grain size in the Fe-Cr-Al alloys. The Zr-modified Fe-Cr-Al sample with coarse Laves phases exhibits a high ultimate tensile strength of 600 MPa and an elongation of 28%, indicating improved formability. The superior combination of strength and ductility in this sample is attributed to grain refinement and discontinuous deformation. This study provides insights into the behavior and effects of coarse Laves phase, and offers potential for further design and microstructure control of Fe-Cr-Al alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Yuyang Hou, Kota Kadoi
Summary: The effect of oxides on promoting the nucleation of equiaxed ferrite was studied in gas tungsten arc (GTA) welding conditions. It was found that the formation of oxides such as Ti2O3, (Ti, Al)2O3, and MgAl2O4 is crucial for the solidification of equiaxed ferrite. Ti2O3 and (Ti, Al)2O3 can act as heterogeneous nuclei for TiN due to their low lattice misfits. MgAl2O4 has a fully paralleled orientation relationship with TiN and can significantly accelerate its formation. The presence of multiple accelerating planes of MgAl2O4 and a high quantity of MgAl2O4-TiN as nucleation sites have an optimal effect on equiaxed solidification under a high-temperature gradient.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Marina A. A. Nikitina, Rinat K. K. Islamgaliev, Artur V. V. Ganeev, Aleksandra A. A. Frik
Summary: The influence of the ultrafine-grained (UFG) structure on the fatigue endurance limit and the nature of fatigue failure is investigated. It is found that the presence of carbides and the coincidence site lattice relationship (CSL) and twin boundaries in the UFG structure leads to an increase in the fatigue endurance limit. Scanning and transmission electron microscopy and X-ray diffraction analysis are used to study the mechanisms of fatigue failure. The formation of the UFG structure through rolling and subsequent heat treatment results in a significant increase in the fatigue endurance limit by more than 70%.
Article
Chemistry, Physical
Jaehyeok Jin, Kenneth S. Schweizer, Gregory A. Voth
Summary: The first paper of this series demonstrated the scalability of excess entropy for both fine-grained and coarse-grained systems. However, a more precise determination of the scaling relationship was not possible due to its semi-empirical nature. In this second paper, an analytical scaling relation for excess entropy is derived for bottom-up coarse-grained systems. By constructing effective hard sphere systems at the single-site resolution, the dynamics and excess entropy of the target coarse-grained systems can be accurately approximated.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Jia Xing, Chengzhi Liu, Aimin Li, Shouming Wang, Xinjie Zhang, Yongxin Shi
Summary: The stress-strain response and microstructural evolution of coarse-grained S31254 super austenitic stainless steel were investigated. The results showed that temperature and strain rate significantly influenced the energy required for plastic deformation and deformation mechanism. A constitutive equation and processing maps were established, and optimal processing parameters were clarified.
Article
Physics, Fluids & Plasmas
Weiping Zhang, Yi Xiong, Jiawei Wu, Wenrui Cheng, Congcong Du, Shuoxue Jin, Baoru Sun, Tongde Shen
Summary: Nanostructured stainless steel demonstrated better radiation and swelling resistance compared to coarse grained stainless steel, particularly in resisting the effects of helium.
Article
Polymer Science
Manuel Quesada-Perez, Jose-Alberto Maroto-Centeno, Maria del Mar Ramos-Tejada, Alberto Martin-Molina
Summary: This work computes the longtime diffusion of a solute in a chemically crosslinked and flexible hydrogel using a coarse-grained model of a polymeric network. The relevance of chain flexibility becomes important when the polymer volume fraction and the solute size increase. The results show that solute particles can moderately diffuse in flexible hydrogels even when their diameter is comparable to the mesh size. The diffusion coefficients obtained here are in good agreement with previously reported experimental data, without the need for any adjustable parameter.
Article
Materials Science, Multidisciplinary
Huimin Zhu, Shujiang Geng, Gang Chen, Fuhui Wang
Summary: The Ni-Mn3O4 and Ni-Mn3O4-CeO2 composite coatings fabricated on SUS 430 steel show improved high temperature oxidation resistance, with CeO2 effectively reducing the interdiffusion between the coating and the steel. An area specific resistance (ASR) of 25.1 m omega cm2 is achieved.
Review
Chemistry, Multidisciplinary
Zhenghao Zhu, Xubo Luo, Stephen J. Paddison
Summary: Ion-containing polymers have been extensively studied due to their potential as electrolytes in energy storage devices. Coarse-grained modeling is an efficient approach to explore the structural and dynamical properties of these materials. This review summarizes the current understanding and development of ion-containing polymers and provides insights into their design for improved performance in power source technologies.
Article
Materials Science, Multidisciplinary
Zhuang Zhang, Xin-Rui Zhang, Tao Jin, Chun-Guang Yang, Yu-Peng Sun, Qi Li, Ke Yang
Summary: Research has shown that copper-bearing stainless steel can improve the corrosion resistance and antibacterial properties of materials, especially with Cu(I) playing a crucial role in contact-killing efficiency.
Article
Materials Science, Multidisciplinary
Xingzhi Zhou, Deyong Wang, Xianglong Li, Tianpeng Qu, Dong Hou, Shaoyan Hu, Zhixiao Zhang, Huihua Wang
Summary: The effect of magnesium rare-earth (Mg-RE) treatments on TiN epitaxial nucleation to refine the as-cast structure of ultrapure ferritic stainless steel was investigated. It was found that TiN can be refined after the RE/Mg-RE treatment, and the size of inclusions increased with the RE content. The Mg-RE treatment yielded the finest solidification structure with completely equiaxed grains.
MATERIALS CHARACTERIZATION
(2023)
Article
Engineering, Civil
Zixuan Chen, Yuner Huang, Ben Young
Summary: Ferritic stainless steel is increasingly used in the construction industry for its excellent mechanical properties and relatively low price. Experimental and numerical investigations of ferritic stainless steel perforated beams show that hole size has an impact on moment capacity and curvature, while section slenderness has little influence on moment capacity. This study suggests modified design rules for cold-formed ferritic stainless steel perforated beams to improve accuracy.
ENGINEERING STRUCTURES
(2022)
Article
Chemistry, Physical
Michael R. DeLyser, W. G. Noid
Summary: Investigated a new class of one-body potentials called square gradient (SG) potentials that can improve the accuracy and transferability of coarse-grained (CG) models. These SG potentials can tune interfacial properties and enhance the performance of various models.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Seok Su Sohn, Alisson Kwiatkowski da Silva, Yuji Ikeda, Fritz Koermann, Wenjun Lu, Won Seok Choi, Baptiste Gault, Dirk Ponge, Joerg Neugebauer, Dierk Raabe
ADVANCED MATERIALS
(2019)
Article
Biochemistry & Molecular Biology
Nataliya Skryabina, Valery Aptukov, Petr Romanov, Daniel Fruchart, Patricia de Rango, Gregory Girard, Carlos Grandini, Hugo Sandim, Jacques Huot, Julien Lang, Rosario Cantelli, Fabrice Leardini
Article
Materials Science, Multidisciplinary
T. Brekailo, D. R. Almeida Jr, M. Avalos, R. E. Bolmaro, H. R. Z. Sandim
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2019)
Article
Engineering, Manufacturing
F. C. Pinto, I. R. Souza Filho, M. J. R. Sandim, H. R. Z. Sandim
ADDITIVE MANUFACTURING
(2020)
Article
Materials Science, Multidisciplinary
I. R. Souza Filho, A. Dutta, D. R. Almeida Junior, W. Lu, M. J. R. Sandim, D. Ponge, H. R. Z. Sandim, D. Raabe
Article
Chemistry, Physical
Leonardo Shoji Aota, Priyanshu Bajaj, Hugo Ricardo Zschommler Sandim, Eric Aime Jaegle
Article
Materials Science, Multidisciplinary
D. R. Almeida, P. R. Rios, D. Zoellner, H. R. Z. Sandim
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2020)
Article
Materials Science, Multidisciplinary
M. J. R. Sandim, I. R. Souza Filho, C. F. G. S. Mota, K. D. Zilnyk, H. R. Z. Sandim
Summary: The study tracked the strain-induced alpha'-martensite and austenite reversion in a cold rolled UNS S32304 lean duplex steel using magnetic measurements and EBSD analysis. The results showed complete austenite reversion at 800 degrees Celsius with full recrystallization of the steel.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
G. O. Fulop, M. B. S. Dias, H. R. Z. Sandim, C. Bormio-Nunes
Summary: This study investigated the application of Fe-3wt.%Ti alloy in the field of electrical motors and found that its magnetic properties are superior to Fe-Si, making it a potential alternative for improving motor performance.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
M. J. R. Sandim, V Mauro, S. S. M. Tavares, K. D. Zilnyk, H. R. Z. Sandim
Summary: The annealing behavior of cold-rolled 317L austenitic stainless steel was investigated, revealing the occurrence of austenite reversion, decrease of delta ferrite, and massive sigma phase precipitation within certain temperature and time intervals. At 800 degrees C, the steel is almost fully recrystallized, except for the eye-shaped structures which have less intense precipitation internally. Precipitation of sigma phase preferentially occurs at the delta ferrite lamellae.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
L. F. Kultz Unti, L. S. Aota, A. L. Jardini, A. P. Tschiptschin, H. R. Z. Sandim, E. A. Jaegle, K. D. Zilnyk
Summary: The 15-5PH stainless steel offers high mechanical strength, ductility, and good corrosion resistance for aircraft and aerospace applications. LPBF-processed 15-5PH stainless steel in the as-built condition exhibits low porosity, high hardness, and a large amount of retained austenite, with specific microstructural characteristics.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Leonardo Shoji Aota, Priyanshu Bajaj, Kahl Dick Zilnyk, Dirk Ponge, Hugo Ricardo Zschommler Sandim
Summary: This study investigates the effects of cold rolling and subsequent annealing on the microstructure of AISI 316L stainless steel processed by laser powder-bed fusion (LPBF). Mechanical twinning and shear banding are observed during deformation, with abnormal grain growth seen in <110> grains at shear bands after annealing. The study suggests that abnormal growth can be triggered by shear bands, and avoiding shear banding inhibits abnormal grain growth for a more uniform microstructure.
Article
Materials Science, Multidisciplinary
Leonardo Shoji Aota, Priyanshu Bajaj, Kahl Dick Zilnyk, Eric Aime Jaegle, Dirk Ponge, Hugo Ricardo Zschommler Sandim, Dierk Raabe
Summary: Alloys manufactured by laser powder-bed fusion exhibit intrinsic and hierarchical microstructural features that affect the recrystallization mechanisms. By changing the scanning strategy, it is possible to control the emerging grain patterns. Recrystallization is observed to be slow due to dynamic Zener-Smith pinning, leading to jerky boundary motion, while altering the scanning strategy has an impact on grain topology.
Article
Materials Science, Multidisciplinary
F. C. Pinto, H. R. Z. Sandim
Summary: This study investigates the microstructure and mechanical properties of a 17.48-mm-thick electron beam-welded API 5L X65 steel sheet. The advantages of electron beam welding, such as high energy conversion efficiency, low heat input, and low warpage, make it a viable alternative for welding thick plates in pipeline construction. The microstructure changes in the heat affected zone and fusion zone are minimized with electron beam welding and do not significantly affect the weld's mechanical properties. Charpy V-notch tests confirmed that the weld beads met the requirements of the API 5L standard.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Nuclear Science & Technology
K. D. Zilnyk, P. A. Suzuki, H. R. Z. Sandim
Summary: Reduced-activation ferritic-martensitic oxide-dispersion-strengthened (RAFM-ODS) Eurofer steel shows remarkable microstructural stability during long-term exposure at high temperatures. The softening mechanism is mainly attributed to discontinuous recrystallization, and the coarsening of M23C6 carbides upon annealing.
NUCLEAR MATERIALS AND ENERGY
(2023)
