Article
Nanoscience & Nanotechnology
Qinan Han, Xusheng Lei, Hao Yang, Xiaolin Yang, Zimu Su, Shao-Shi Rui, Nan Wang, Xianfeng Ma, Haitao Cui, Huiji Shi
Summary: This paper investigates the effects of temperature and load on the distribution of geometrically necessary dislocation (GND) induced by fretting fatigue in titanium alloy. The results show that both temperature and load have significant effects on GND densities, with an increase in temperature and load leading to a rise in GND densities. The peak positions of GND density correspond well with crack formation locations, indicating a close relationship between GND concentration and fretting fatigue crack formation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Crystallography
Qizhen Li
Summary: This study analyzed the GND densities of five selected fine-grained magnesium samples. Different fatigue-loading conditions were applied to three samples at 0 degrees C, one experienced quasi-static tensile loading at 0 degrees C, and one represented the as-rolled state. The results provide new insights into the deformation mechanism of fine-grained magnesium at 0 degrees C, showing significant increases in GND density for the tested samples compared to the as-rolled sample, especially for the sample with low-maximum applied stress.
Article
Nanoscience & Nanotechnology
Nan Wang, Yongnan Chen, Gang Wu, Qinyang Zhao, Zhen Zhang, Lixia Zhu, Jinheng Luo
Summary: This study reveals the different contributions of geometrically necessary dislocation (GND) and statistically stored dislocation (SSD) to work hardening in dual-phase steel. By introducing high-density GND through pre-tensile loading-unloading-reloading (LUR) and high-density SSD through monotonic pre-tensile, it is found that the steel with high GND exhibits higher yield stress and stronger strain hardening ability compared to the high-SSD steel, even with almost the same total dislocation density.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Sven E. Gustafson, Wolfgang Ludwig, Raquel Rodriguez-Lamas, Can Yildirim, Katherine S. Shanks, Carsten Detlefs, Michael D. Sangid
Summary: Triple junctions in polycrystalline solids are known for their potential stress concentration and strain localization. This study measures the intragranular lattice curvatures and elastic strains at triple junctions using a novel zoom-in style combination of synchrotron X-ray techniques. Additionally, the impact of including elastic strain gradients while calculating dislocation density within embedded grains is revisited.
Article
Materials Science, Multidisciplinary
Tsubasa Tokuzumi, Masatoshi Mitsuhara, Shigeto Yamasaki, Tomonari Inamura, Toshiyuki Fujii, Hideharu Nakashima
Summary: The excellent mechanical properties of Mg-Zn-Y alloys with a Mg-based long-period stacking ordered (LPSO) phase are attributed to the kink bands formed by plastic deformation. This study investigated the strengthening mechanism of kink bands in directionally solidified single-phase LPSO Mg85Zn6Y9 alloys. It was found that the presence of disclinations and dislocation pile-ups contribute to the kink-band strengthening. The study provides insights into the factors responsible for kink-band strengthening in LPSO-phase Mg alloys.
Article
Nanoscience & Nanotechnology
Shin-ichi Inoue, Michiaki Yamasaki, Mitsuru Ohata, Shigeki Kakiuchi, Yoshihito Kawamura, Hidenori Terasaki
Summary: Friction stir welding was used to join nonflammable Mg85Al10Ca5 alloy extrusion plates with a high volume fraction of the C36 intermetallic compound. The textured zones in the friction-stir-welded region were characterized by EBSD, showing that the fracture behavior was dominated by geometric softening in the SAZ.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Jinshu Xie, Jinghuai Zhang, Zhi Zhang, Zijian Yu, Zhihao Xu, Ru Wang, Daqing Fang, Xiaobo Zhang, Xiaoru Zhang, Ruizhi Wu
Summary: Understanding the corrosion mechanism of magnesium (Mg) alloys and controlling the potential fluctuation are crucial for developing high-strength corrosion-resistant Mg alloys. This study reveals that the presence of different microstructures in Mg alloys can affect the corrosion rate and film formation. The structurally enhanced microstructure can reduce the potential fluctuation, leading to improved corrosion resistance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Review
Metallurgy & Metallurgical Engineering
Yujin Nie, Jianwei Dai, Xuan Li, Xiaobo Zhang
Summary: Corrosion is a major drawback for the wide applications of Mg alloys, with attention being drawn to the corrosion behaviors of alloys with stacking fault or long period stacking ordered structures. However, the corrosion mechanisms of these alloys remain unclear, calling for further research and improvement.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
Kai Zhang, Xinbao Liu, Ping Fan, Lin Zhu, Kai Wang, Lin Wang, Caili Zhao
Summary: This study investigates the change of geometrically necessary dislocation (GND) during the elevated temperature creep of P91 steel. The results show that the GND density increases significantly during the initial creep stage, reaches a maximum at the transition from initial creep to steady creep, and gradually decreases during subsequent creep. It also demonstrates that the GND density can be used to predict internal stress and analyze microstructure degradation of P91 steel during creep.
MATERIALS CHARACTERIZATION
(2023)
Article
Metallurgy & Metallurgical Engineering
Guo-Liang Shi, Kui Zhang, Xing-Gang Li, Yong-Jun Li, Ming-Long Ma, Jia-Wei Yuan, Hong-Ju Zhang
Summary: The study analyzed the influence of thermomechanical treatment T10 on the dislocation structure and precipitation behavior in magnesium alloys, and found that T10 treatment can significantly enhance the strengthening effect of magnesium alloys. This is achieved by forming high-density basal I-1 stacking faults and < c + a > dislocations as nucleation sites and fast diffusion channels for continuous precipitates in extension twins.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Koji Hagihara, Ryohei Ueyama, Toko Tokunaga, Michiaki Yamasaki, Yoshihito Kawamura, Takayoshi Nakano
Summary: This study quantitatively evaluated the kink-band strengthening using a Mg-Zn-Y single crystal, revealing the origin of the anomalous ability of kink bands acting as barriers to dislocation motion. The high ability of a kink-band boundary to hinder dislocation motion is attributed to its peculiar hierarchical structure, where many small kink bands with high crystal rotation angles accumulate in a localized region.
MATERIALS RESEARCH LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Wenkai Fu, Yulan Li, Shenyang Hu, Peter Sushko, Suveen Mathaudhu
Summary: Through the study of crystal plasticity theory, it was found that in solid phase processing, regions with high misorientation and GND density first appear near grain boundaries and extend towards interior grains. The loading path affects plastic deformation accumulation and recovery, and thus affects dislocation evolution and misorientation.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Engineering, Manufacturing
Bin Zhang, Andrew C. Meng, W. J. Meng
Summary: Metal forming at the meso- and micro-scale can be affected by the grain size of the material, leading to deviations from conventional plasticity. Larger grain sizes in copper require higher pressures for extrusion in axisymmetric reverse extrusion and result in less flow into micron-sized gaps in double-punch molding compared to smaller grain sizes. Crystallographic orientation data suggests that larger grain sizes store more dislocations during deformation, influencing the mechanical behavior.
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
(2021)
Article
Materials Science, Multidisciplinary
M. A. Mattucci, I Cherubin, P. Changizian, T. Skippon, M. R. Daymond
Summary: The study compared the response of Ni irradiated with protons to the non-irradiated material, based on dislocation density, through TEM analysis and nano/micro-scale indentation tests. The results showed a bi-linear trend in the Nix-Gao model for both irradiated and non-irradiated material, indicating a transition in deformation mechanisms at the nano-scale. It was suggested that the increase in hardness observed in the irradiated material during nanoindentation could be attributed to a higher density of geometrically necessary dislocations.
Article
Nanoscience & Nanotechnology
P. S. M. Jena, S. K. Pradhan, S. Tripathy, B. Mahato, C. Fernando, N. Paulose, J. K. Sahu
Summary: The study on the evolution of geometrically necessary dislocation density (GND) at the gamma and primary gamma' interface during tensile deformation of turbine disk alloy revealed that GND values were highest at 800 degrees C and lowest at 350 degrees C, primarily due to the gamma/gamma' misfit value. At high temperatures, localized plastic deformation in the gamma-matrix near gamma-gamma' interfaces was identified as the main cause for necking after yielding, as evidenced by higher GND values and grain interior distortion.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Klaudia Horvath Fekete, Daria Drozdenko, Jan Capek, Kristian Mathis, Domonkos Tolnai, Andreas Stark, Gerardo Garces, Patrik Dobron
JOURNAL OF MAGNESIUM AND ALLOYS
(2020)
Article
Crystallography
Daria Drozdenko, Gergely Farkas, Pavol Simko, Klaudia Fekete, Jan Capek, Gerardo Garces, Dong Ma, Ke An, Kristian Mathis
Summary: Deformation mechanisms in extruded Mg-Y-Zn alloys with different volume fractions of the long-period stacking ordered (LPSO) structure were investigated using electron backscattered diffraction (EBSD) and in situ neutron diffraction (ND) techniques. The twinning-detwinning mechanism in the alpha-Mg phase is crucial for the subsequent hardening behavior of alloys with complex microstructures, and the lattice strain development and dislocation density evolution were analyzed in detail in specific alloys.
Article
Metallurgy & Metallurgical Engineering
P. Dobron, D. Drozdenko, K. Fekete, M. Knapek, J. Bohlen, F. Chmelik
Summary: The deformation behavior of Mg-Al-Mn sheet during tensile loading in different directions was investigated using acoustic emission technique and microstructural analyses to reveal the activity of dislocation slip systems and their evolution.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Chemistry, Physical
A. C. Bouali, M. H. Iuzviuk, M. Serdechnova, K. A. Yasakau, D. Drozdenko, A. Lutz, K. Fekete, G. Dovzhenko, D. C. F. Wieland, H. Terryn, M. G. S. Ferreira, I. A. Zobkalo, M. L. Zheludkevich
Summary: The growth of ZnAl layered double hydroxide (LDH) on the AA2024 surface is governed by a two-dimensional diffusion-controlled reaction with a zero nucleation rate. Additional analysis methods revealed different stages of LDH growth, including the formation of an intermediate layer as a basis for LDH flakes and a Cu-rich layer that may accelerate LDH growth.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Klaudia Fekete, Gergely Farkas, Daria Drozdenko, Domonkos Tolnai, Andreas Stark, Patrik Dobron, Gerardo Garces, Kristian Mathis
Summary: The compressive deformation behavior of Mg88Zn7Y5 alloy with a high volume fraction of the LPSO phase was studied in relation to temperature, showing a decrease in yield strength with increasing deformation temperature. The macroscopic yielding of the alloy is controlled by the activation of deformation kinking in the LPSO phase at all tested temperatures.
Article
Materials Science, Multidisciplinary
Klaudia Fekete, Daria Drozdenko, Petr Cejpek, Patrik Dobron, Jozef Vesely, Michiaki Yamasaki, Yoshihito Kawamura
Summary: The study investigated the thermal stability of rapidly solidified Mg97.94Zn0.56Y1.5 alloy, finding that the material exhibits thermal stability up to 400 degrees Celsius, preventing grain growth. At higher temperatures, grain growth and texture redistribution are related to the recrystallization process. The arrangement of solute-segregated SFs is independent of annealing temperatures.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Daria Drozdenko, Michiaki Yamasaki, Kristian Mathis, Patrik Dobron, Shin-ichi Inoue, Yoshihito Kawamura
Summary: This study focused on the relationship between microstructure and corrosion dynamics in dilute Mg97.94Zn0.56Y1.5 alloys prepared by the consolidation of rapidly solidified ribbons. The dynamics of corrosion were monitored using electrochemical methods and acoustic emission techniques. Results showed that internal strain distribution, grain morphology, and distribution of secondary phases play a significant role in the corrosion process.
Article
Nanoscience & Nanotechnology
Oleksandr Boiko, Daria Drozdenko, Peter Minarik
Summary: This paper investigates the dielectric properties of (FeCoZr)(x)(Pb(ZrTi)O-3)((100-x)) granular metal-dielectric nanocomposites below the percolation threshold. Different types of polarization processes, including interfacial and dipolar polarizations, are observed. The conduction mechanism in the tested material is hopping carrier exchange between metallic phase nanograins.
Article
Materials Science, Multidisciplinary
Kicheol Hong, Csilla Kadar, Michal Knapek, Daria Drozdenko, Peter Jenei, Myung-Yeon Kim, Heeman Choe, Kristian Mathis, Hyeji Park, Jeno Gubicza
Summary: Copper foams with high porosity were processed by freeze-casting and space-holder methods, resulting in different compressive yield strength values. FC-Cu foam exhibited higher energy absorption capability and localized fracture during compression, while SH-Cu foam showed homogeneous deformation mechanisms.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
P. Dobron, D. Drozdenko, M. Maric, O. Muransky
Summary: This study analyzed the plastic anisotropy of a hot-rolled Zircaloy-4 during compressive loading in three orthogonal directions using the acoustic emission technique and scanning electron microscopy. The results showed that dislocation glide and twinning were the dominant deformation mechanisms. It was also found that the twinning was more intensive in the rolling and transverse directions, primarily due to twin thickening rather than massive twin nucleation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Mathematics, Applied
Daria Drozdenko, Michal Knapek, Martin Kruzik, Kristian Mathis, Karel Svadlenka, Jan Valdman
Summary: This paper presents a large-strain model of single-slip crystal elastoplasticity formulated within the framework of energetic solutions, and compares the numerical performance of the model with laboratory experiments on the compression of a stack of papers.
MILAN JOURNAL OF MATHEMATICS
(2022)
Meeting Abstract
Chemistry, Multidisciplinary
Petr Cejpek, Kristian Mathis, Daria Drozdenko, Ross Colman, Oleg Heczko, Ladislav Straka
ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES
(2021)
Meeting Abstract
Chemistry, Multidisciplinary
Daria Drozdenko, Klaudia Fekete, Jan Bohlen, Sangbong Yi, Patrik Dobron
ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES
(2021)
Article
Materials Science, Multidisciplinary
A. Kolomiets, M. Paukov, J. Valenta, B. Chatterjee, A. Andreev, K. O. Kvashnina, F. Wilhelm, A. Rogalev, D. Drozdenko, P. Minarik, J. Kolorenc, M. Richter, J. Prchal, L. Havela
Summary: In this study, the 5f-based ferromagnet UGa2 was investigated using X-ray absorption spectroscopy and X-ray magnetic circular dichroism. The results showed that the uranium 5f states have a large orbital magnetic moment, partially compensated by the antiparallel spin moment, resulting in a total 5f magnetic moment. Comparison between experimental and theoretical results revealed a clear correlation between the uranium ionicity of different metallic uranium compounds.
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)