Article
Chemistry, Physical
Elena N. Popova, Irina L. Deryagina, Evgeniya G. Valova-Zaharevskaya, Maria Letizia Ruello, Vladimir V. Popov
Summary: This study focuses on heavily drawn multicore Cu-18Nb composites and analyzes their microstructure, microhardness, and thermal stability. The research demonstrates that under higher strain, the distinctive fiber texture of the material becomes sharper, with distortions observed in both niobium and copper lattice structures. The structural changes in niobium filaments during annealing result in a significant decrease in strength at high temperatures.
Article
Materials Science, Multidisciplinary
Zhe Yan, Zhaorui Liu, Xiangfei Kong, Bonan Yao, Qi An, Shuimiao Jiang, Ruifeng Zhang, Irene J. Beyerlein, Shijian Zheng
Summary: Voids are common radiation-induced defects in nuclear materials that have detrimental effects on mechanical properties. The size, location, and shape of voids significantly influence dislocation behavior such as nucleation site, nucleation stress, and preferred slip system. Different morphologies of voids have distinct impacts on dislocation behavior.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Chemistry, Physical
Junsheng Zhao, Limin Zhang, Fengming Du, Xia Yuan, Pengfei Wang
Summary: The microstructure evolution of Cu-Sn-P alloy subjected to hot deformation was studied through EBSD and TEM, revealing significant hardening and softening effects, with changes in dislocation density, textures, and grain sizes playing different roles in stress behaviors. Low-angle grain boundaries dominate the deformed microstructures, where high dislocation densities facilitate initiation of dislocation slipping systems.
Article
Engineering, Mechanical
Siamak Soleymani Shishvan
Summary: A high-temperature discrete dislocation plasticity framework is used to predict the tensile and creep responses of Cu-Nb composites at 400 degrees C. The creep response is found to be dependent on the laminate length scale and stress, with experimental data and predictions showing good agreement.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Nanoscience & Nanotechnology
Nitin Srivastava, Sangeeta Santra
Summary: This study investigates the effect of internal and external alloying of Zr on the superconducting properties of Nb3Sn in a Cu(Sn)/Nb system using the diffusion couple method. Alloying of Zr with Cu(Sn) or Nb enhances the critical current density (Jc) of Nb3Sn due to an increase in grain boundary fraction. The strengthening of pinning forces in Zr-alloyed Nb3Sn is attributed to the development of a nanometer-sized second phase (beta-(Nb, Zr)) within the Nb3Sn matrix.
SCRIPTA MATERIALIA
(2023)
Article
Engineering, Civil
Fei Liu, Zhiyi Liu, Guangyu He
Summary: Investigations were conducted on the dislocation slips, texture evolution, and Goss-oriented grain refinement during the annealing of Al-Cu-Mg alloy by means of optical microscope (OM), scanning electron microscope (SEM), electron back-scatter diffraction (EBSD), transmission electron microscope (TEM), and X-ray diffraction (XRD). The results showed that {111} octahedral slip systems and {110} non-octahedral slip systems were activated during the hot- and cold-rolling processes. Strain homogenization during annealing decreased the strain gradients between adjacent grains, thereby suppressing the growth of {110} <001> Goss-oriented grains.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
Wenfan Yang, Mingyu Gong, Jiahao Yao, Jiangwei Wang, Shijian Zheng, Xiuliang Ma
Summary: The study shows that introducing a disordered interface in Cu/Nb multilayers can significantly enhance their hardness by relaxing the Burgers vectors of dislocations. These findings are expected to provide new insights for the development of novel materials with ultrahigh hardness.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
M. Zhang, J. C. Gibeling
Summary: The stress reduction creep tests on a Cu-Cr-Nb alloy at 923 K revealed local dislocation climb as the rate-controlling deformation mechanism, with an activation energy consistent with self-diffusion in the Cu matrix. An internal back stress of approximately -9 MPa was found to act on the rate-controlling dislocations, believed to be the sum of interaction between dislocations and particles, as well as dislocations themselves. However, this back stress does not lead to a true threshold in thermally activated dislocation motion.
SCRIPTA MATERIALIA
(2021)
Article
Engineering, Electrical & Electronic
Taro Morita, Tsuyoshi Yagai, Nobuya Banno
Summary: Zn doping in Nb3Sn wire results in smaller grain size, improved J(c) and thinner Nb3Sn layer. Increasing Zn content in the Sn-Zn core sacrifices Sn content, leading to a decrease in Nb3Sn thickness in Zn-doped specimens.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2021)
Article
Nanoscience & Nanotechnology
Rui Gao, Miaomiao Jin, Qing-Jie Li, Kang Pyo So, Lifeng Zhang, Xianping Wang, Qianfeng Fang, Cheng Sun, Lin Shao, Ju Li
Summary: Gas generation can degrade material properties in nuclear applications, and self-assembled bubble channels are proposed to help release gas. The study found that the outgassing networks in helium-irradiated Cu/Nb multilayers with low structural damage have a hybrid diffusive-displacive nature, requiring careful design of the outgassing strategy to avoid structural failure.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Luorong Dengzhu, Leiming Fang, Bin Gan, Zhengwei Xiong, Qian Liu, Yi Liu, Jia Yang, Jun Li, Zhipeng Gao
Summary: This study elucidates the microstructural changes induced by cold deformation on MP159 alloy through multi-scale structural characterizations. The results show that cold deformation refines the grains, breaks the grain boundaries and transforms them into low-angle grain boundaries, leading to significant enhancement of strength and hardness in the alloy.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Mingwang Xie, Wei Huang, Huiming Chen, Liukui Gong, Weibin Xie, Hang Wang, Bin Yang
Summary: This study experimentally investigated the microstructural evolution and strengthening mechanisms of pure copper and Cu-Ag alloys subjected to cold rolling. The results showed that dislocation strengthening and boundary strengthening were the dominant mechanisms in cold-rolled Cu-Ag alloys, with the addition of silver leading to higher steady-state strength due to increased concentration of dislocations and subgrain boundaries, and a larger volume fraction of high-strength eutectic colonies in Cu-15Ag compared to Cu-10Ag.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Chong Dong, Jinye Yao, Min Shang, Haoran Ma, Jun Chen, Haitao Ma, Yunpeng Wang
Summary: In this study, the growth behavior of Cu6Sn5 grains during the isothermal stage in solder joints was investigated. A new phenomenon, the formation of Cu6Sn5 with cellular boundary, was found. The role of Ag3Sn in the formation of the cellular boundary was identified. The study provides important insights into the growth of Cu6Sn5 and the improvement of solder joint reliability.
Article
Materials Science, Multidisciplinary
Xiaowei Feng, Dongping Zhang, Bo Feng, Yingfei Lin, Juan Wang, Kaihong Zheng
Summary: The study successfully prepared Cu-0.4 wt.% Al2O3 composites using internal oxidation and hot extrusion followed by cold drawing. Results showed that the cold drawn S2 sample had finer grains and higher tensile strengths than the extruded S1 sample, while maintaining good electrical conductivity. High microhardness after annealing at 900 degrees C indicated excellent thermal stability of the composites.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Nanoscience & Nanotechnology
Zhanfeng Wang, Junjie Zhang, Jinzhong Lu
Summary: This study investigates the deformation mechanisms of single crystal and bicrystal Cu workpieces under nanoindentation through experiments and molecular dynamics simulations. The results highlight the significant role of dislocation-grain boundary interactions and crystallographic orientation on the mechanical response of the materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Physics, Atomic, Molecular & Chemical
S. A. Chuprakov, N. S. Bannikova, I. V. Blinov, T. P. Krinitsina, M. A. Milyaev, V. V. Popov, V. V. Ustinov
APPLIED MAGNETIC RESONANCE
(2019)
Article
Crystallography
V. V. Popov, A. V. Stolbovsky, S. A. Murzinova
CRYSTALLOGRAPHY REPORTS
(2020)
Article
Chemistry, Physical
V. V. Popov, E. Osinnikov, S. A. Murzinova, A. Stolbovsky, R. M. Falahutdinov
JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION
(2020)
Article
Metallurgy & Metallurgical Engineering
V. V. Popov, E. N. Popova, A. Stolbovsky, R. M. Falahutdinov, S. A. Murzinova, E. Shorokhov, K. Gaan
PHYSICS OF METALS AND METALLOGRAPHY
(2020)
Article
Materials Science, Multidisciplinary
A. Katz-Demyanetz, I. I. Gorbachev, E. Eshed, V. V. Popov, V. V. Popov, M. Bamberger
MATERIALS CHARACTERIZATION
(2020)
Article
Metallurgy & Metallurgical Engineering
M. E. Stupak, M. G. Urazaliev, V. V. Popov
PHYSICS OF METALS AND METALLOGRAPHY
(2020)
Article
Metallurgy & Metallurgical Engineering
M. G. Urazaliev, M. E. Stupak, V. V. Popov
Summary: Fourteen symmetric tilt boundaries with the < 110 > axis in Ni have been investigated by computer simulation, showing that their structures can be represented by a limited number of components and remain stable at elevated temperatures. Energies of formation of vacancies in grain boundaries have also been calculated.
PHYSICS OF METALS AND METALLOGRAPHY
(2021)
Article
Metallurgy & Metallurgical Engineering
E. Osinnikov, S. A. Murzinova, A. Yu Istomina, V. V. Popov, A. Stolbovskiy, R. M. Falahutdinov
Summary: The experiment on the grain-boundary-diffusion coefficient of Co in ultrafine Ni subjected to high-pressure torsion shows that non-equilibrium grain boundaries act as paths for ultrafast diffusion, leading to faster diffusion rates compared to coarse-grained Ni. Recovery processes occur upon heating in the grain boundaries, approaching the properties of general high-angle grain boundaries.
PHYSICS OF METALS AND METALLOGRAPHY
(2021)
Review
Materials Science, Multidisciplinary
Kaveh Edalati, Andrea Bachmaier, Victor A. Beloshenko, Yan Beygelzimer, Vladimir D. Blank, Walter J. Botta, Krzysztof Bryla, Jakub Cizek, Sergiy Divinski, Nariman A. Enikeev, Yuri Estrin, Ghader Faraji, Roberto B. Figueiredo, Masayoshi Fuji, Tadahiko Furuta, Thierry Grosdidier, Jeno Gubicza, Anton Hohenwarter, Zenji Horita, Jacques Huot, Yoshifumi Ikoma, Milos Janecek, Megumi Kawasaki, Petr Kral, Shigeru Kuramoto, Terence G. Langdon, Daniel R. Leiva, Valery Levitas, Andrey Mazilkin, Masaki Mito, Hiroyuki Miyamoto, Terukazu Nishizaki, Reinhard Pippan, Vladimir V. Popov, Elena N. Popova, Gencaga Purcek, Oliver Renk, Adam Revesz, Xavier Sauvage, Vaclav Sklenicka, Werner Skrotzki, Boris B. Straumal, Satyam Suwas, Laszlo S. Toth, Nobuhiro Tsuji, Ruslan Z. Valiev, Gerhard Wilde, Michael J. Zehetbauer, Xinkun Zhu
Summary: This article comprehensively reviews recent advances in the development of ultrafine-grained and nanostructured materials through severe plastic deformation and provides a brief history of this field. Severe plastic deformation methods have been effective in producing materials with advanced mechanical and functional properties, and the field of NanoSPD has experienced significant progress in the past two decades.
MATERIALS RESEARCH LETTERS
(2022)
Article
Chemistry, Physical
V. V. Popov, M. E. Stupak, M. G. Urazaliev
Summary: The <110> symmetric tilt grain boundaries in niobium were studied using computer simulation methods. The structure and energies of the boundaries, as well as the energies of vacancy formation within them, were calculated. The dependence of vacancy formation energies on various factors was analyzed. The stability of the boundaries at elevated temperatures was investigated using molecular dynamics, and the coefficients of grain-boundary self-diffusion were calculated for the three most stable tilt boundaries.
JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION
(2022)
Article
Metallurgy & Metallurgical Engineering
V. V. Popov, E. Osinnikov, R. M. Falakhutdinov
Summary: Grain boundaries in ultrafine-grained niobium deformed by high-pressure torsion were studied using Mossbauer emission spectroscopy. It was found that the grain boundaries were in a nonequilibrium state with excess free volume after severe plastic deformation. Annealing altered the state of the grain boundaries, bringing them closer to that of coarse-grained materials.
PHYSICS OF METALS AND METALLOGRAPHY
(2022)
Article
Metallurgy & Metallurgical Engineering
M. G. Urazaliev, M. E. Stupak, V. V. Popov
Summary: In this study, the properties and stability of two symmetric tilt boundaries in hexagonal close-packed titanium were investigated using computer simulation. It was found that one of the boundaries remained stable at high temperatures, and the grain-boundary diffusion coefficients were close to experimental values.
PHYSICS OF METALS AND METALLOGRAPHY
(2022)
Article
Metallurgy & Metallurgical Engineering
V. V. Popov, E. Osinnikov
Summary: The Mossbauer emission spectroscopy was used to investigate the mechanisms of grain-boundary diffusion and segregation of Co-57 in polycrystalline Nb. It was found that Co atoms diffuse along the grain boundaries of niobium by the interstitial mechanism. The relative intensity of spectral lines with temperature was analyzed and the grain-boundary segregation factor of Co in Nb was calculated, with comparisons to previous studies on Sn grain-boundary diffusion and segregation in Nb.
PHYSICS OF METALS AND METALLOGRAPHY
(2021)
Proceedings Paper
Multidisciplinary Sciences
M. G. Urazaliev, M. E. Stupak, V. V. Popov
VII INTERNATIONAL YOUNG RESEARCHERS' CONFERENCE - PHYSICS, TECHNOLOGY, INNOVATIONS (PTI-2020)
(2020)
Article
Materials Science, Multidisciplinary
Shuai Zhang, Shuye Zhang, Hongzhi Zhou, Kyung-Wook Paik, Tianran Ding, Weimin Long, Sujuan Zhong, Peng He
Summary: Microwave Hybrid Heating (MHH) is a promising method for material joining, allowing for selective and uniform heating. This experimental study focused on investigating the characteristics and reliability of joints made using nano-Sn-3.0Ag-0.5Cu soldering paste and MHH technique. The research findings showed that the shear strength of the joints reached its peak value under specific microwave power and exposure time, but decreased after thermal shock tests.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Peibin Ma, Mingyang Wang, Aiying Chen, Lijian Gu, Zhiyi Ding, Xiaogui Wang, Bin Gan
Summary: Nano-twinned boundaries in high-temperature alloys play a crucial role in regulating the distribution of nano-precipitates and enhancing mechanical properties.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jiachen Zhang, Fan Lu, Xinxin Liu, Taiwen Huang, Rui Li, Changsheng Tan, Guojun Zhang, Lin Liu
Summary: This study investigates the effects of Re and Ta interactions on the precipitation of the TCP phase in experimental alloys under long-term thermal exposure. The study finds that microstructure segregation is not fully eliminated even with standard heat treatment, and the interaction between Re and Ta enhances the formation of the TCP phase. Thermodynamic calculations and first-principles analysis reveal that Re significantly improves the driving force of TCP phase precipitation. The study also observes a phase transition from the sigma-phase to the P-phase, with Ni playing a crucial role in the diffusion process.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Ronit Roy, Adil Shaik, Matthew Topping, Fei Long, Mark R. Daymond
Summary: This study demonstrates the improvements in characterizing localized dislocation distribution using the HR-EBSD method compared to the conventional approach. Two extreme examples of deformation conditions were investigated to show the efficacy of HR-EBSD in identifying dislocations and subtle features. The direct correlation between slip bands and HR-EBSD estimated GNDs is also presented, enhancing the scope of this approach in identifying individual slip bands.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wenshan Guo, Hui Zhang, Qingjun Zhou, Guangchun Xiao, Ning Guo, Wei Zhao, Gang Wang
Summary: The microstructures and corrosion resistance of TC11 components were significantly improved using a high-power, high-speed laser metal deposition (LMD) process and subsequent post-heat treatment, with greater improvements observed in the deposition direction. The significant improvement of corrosion resistance in the deposition direction is mainly due to the weakening of the charged galvanic corrosion effect between the non-interlayer zone and interlayer zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Xu, Rui Cao, Junheng Gao, Yu Zhang, Haitao Zhao, Shuize Wang, Yuhe Huang, Guilin Wu, Honghui Wu, Chaolei Zhang, Xinping Mao
Summary: In this study, the microstructures and mechanical properties of interphase precipitation strengthening micro-alloyed steels were investigated. The addition of Cr was found to increase the yield strength without significant decrease of ductility. Thermodynamics analysis revealed that the addition of Cr led to grain refinement and decrease of sheet spacing of nanoprecipitates. Calculations showed that the decrease of interphase-precipitated carbides sheet spacing and the refinement of grain size were responsible for the strength enhancement of Cr microalloyed steel.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhaoxin Zhong, Biao Zhang, Yuhan Ren, Jian Ye, Jiawei Zhang, Feng Ye
Summary: In this study, bioinspired web-liked multiphase composites were successfully constructed using boron-modified polysilazane polymer. The composites consisted of long TiB nanowires as 'web' and hybrid TiC and Ti3Si particles as 'nodes'. The enhanced strength of these composites was attributed to the synergistic load transfer of the hybrid reinforcements. This study provides a promising design approach for developing high-performance composites with high reinforcement content, utilizing polymer instead of traditional ceramic powder.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Geng Liu, Linran Yu, Jie Su, Ran Ding, Min Xiong, Qi Gao
Summary: In this study, a flash austenitization heat treatment approach was used to achieve a dual-phase microstructure consisting of retained austenite and fine-grained ferrite in low-carbon TRIP steel. Phase-field simulations revealed the acceleration of ferrite transition kinetics in the Mn-depleted region and the influence of chemical heterogeneity of C and Mn on the stabilization of austenite.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhichao Yang, Dehui Zheng, Zhen Wang, Tingbin Liang, Shuangbao Wang
Summary: In this study, the configurations, formation process, and properties of the Cu-rich layer formed during TJE of Al alloys were revealed using aberration-corrected scanning TEM (STEM), STEM image simulations, and first-principles calculations. The results showed a new orientation relationship between the Cu-rich layer and Al matrix, and provided insights into the formation mechanisms of the Cu-rich layer and Cu diffusion zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Chen, Ruyu Tian, Jiayue Wen, Yanhong Tian
Summary: In this study, the interfacial microstructure evolution and reliability of Cu/Sn-3.0Ag-0.5Cu (SAC305)/Ni and Cu/Sn-3.0Ag-0.5Cu-0.05TiO2 (SAC305-0.05TiO2)/Ni interconnections under thermal shock were investigated. The results showed that the addition of TiO2 nanoparticles can suppress the growth of interfacial IMCs and improve the reliability of the connections.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Yunbin Lu, Yangju Feng, Wei Wang, Wenke Wang, Jianlei Yang, Wenzhen Chen, Guorong Cui, Dongdong Zhuang, Hongyang Cao
Summary: In order to improve the wear resistance of titanium alloy, titanium matrix composites with network distributed TiBw were fabricated. The results showed that the wear rate of the composites decreased by 17.2% at room temperature and 38.4% at high temperature compared to the TA15 alloy. The TiBw in the composites enhanced work hardening, improved thermal conductivity, and effectively hindered dislocation movement and promoted dynamic recrystallization during high-temperature wear.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jubert Pasco, Lu Jiang, Thomas Dorin, Ali Keshavarzkermani, Youliang He, Clodualdo Aranas Jr
Summary: The unique structure and solute distribution of CoCrMo alloys produced using Laser Powder Bed Fusion technique require custom heat-treating processes to achieve the targeted phase distribution and mechanical properties. This study investigates the phase transformation behavior and precipitate distribution of CoCrMo samples after aging heat treatment. The results show differences in phase fraction and nucleation sites between directly aged and solution heat-treated samples.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zipeng Ma, Meng Zhou, Baohong Tian, Yi Zhang, Heng Li, Xu Li, Jin Zou, Haoyan Hu, Ke Jing, Yong Liu, Alex A. Volinsky
Summary: In this study, two electrical contact composites were prepared using the vacuum hot pressing sintering endo-oxidation method. The addition of Y2O3 had no negative effects on the electrical conductivity and hardness of the composites. Moreover, it reduced the welding force and arc energy, and improved the stability of the contacts.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wei Sun, Ning Cui, Shuling Zhang, Tiewei Xu, Xiaopeng Wang, Fantao Kong
Summary: A laminated composite was successfully fabricated and its microstructure and mechanical properties were investigated. The composite exhibited high bonding strength, improved flexural strength and fracture toughness, and superior tensile properties compared to the monolithic alloy.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zih-You Wu, Yin-Ku Lee, Su-Yueh Tsai, Po-Yu Chen, Jenq-Gong Duh
Summary: With the development of the artificial intelligence (AI) industries, electronic packaging is advancing towards high density, high efficiency, and multi-functionality. The application of microbumps is necessary to achieve high density and small-scale interconnection. In this study, three types of full intermetallic compounds (IMCs) bumps were fabricated, and the mechanical and thermal properties of IMCs were analyzed. The results showed that the full IMCs bumps with added Ni and Zn exhibited consistent structure and excellent thermal stability, providing a reliable microstructure for application.
MATERIALS CHARACTERIZATION
(2024)
