Article
Materials Science, Multidisciplinary
J. Gallet, M. Perez, R. Guillou, C. Ernould, C. Le Bourlot, C. Langlois, B. Beausir, E. Bouzy, T. Chaise, S. Cazottes
Summary: The study measured dislocation densities on samples using different methods including TEM, ECCI, HR-EBSD, and XRD. The observed dislocation types varied among the methods. Imaging methods were accurate for low deformation, while HR-EBSD showed good agreement with other methods. Imaging methods were not suitable for high deformation due to increasing uncertainty. The different results highlight the limitations of each method.
MATERIALS CHARACTERIZATION
(2023)
Article
Engineering, Chemical
Shubhadeep Maity, Bijay Kumar Show, Supriya Bera
Summary: Ultrafine B2 NiAl and vacancy ordered phase (Al3Ni2 type) (Cu) form during consolidation of mechanically alloyed Al-Cu-Ni alloys with and without micro alloying addition of Zr and/or Ti, resulting in high hardness. The Al-Cu-(Ni15)-Zr alloy consolidated by spark plasma sintering exhibits a remarkable hardness value of 7.2 GPa. The wide range of hardness values indicates the significant influence of composition and synthesis route. The hardening mechanism is explained through point defect hardening and solute dislocation interaction.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Engineering, Chemical
Tomas F. Babuska, John F. Curry, Michael T. Dugger, Morgan R. Jones, Frank W. DelRio, Ping Lu, Yan Xin, Tomas Grejtak, Robert Chrostowski, Filippo Mangolini, Nicholas C. Strandwitz, Md Istiaque Chowdhury, Gary L. Doll, Brandon A. Krick
Summary: This study investigates the relationship between density, hardness, friction, and wear for pure molybdenum disulfide coatings. The results show that dense films have a wear rate 100 times lower than porous coatings, and high density pure MoS2 coatings demonstrate better tribological performance than composite coatings.
Article
Materials Science, Coatings & Films
Ren Qiu, Olof Backe, Dirk Stiens, Wiebke Janssen, Johannes Kuemmel, Thorsten Manns, Hans-Olof Andren, Mats Halvarsson
Summary: Rotational precursor gas supply induces oscillatory surface reaction leading to the formation of periodic nanolamella structure in TiAlN coatings, affecting the microstructure significantly. The periodicity of nanolamellae can be tuned by controlling the rotation speed relative to the coating growth rate.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
X. Li, S. R. Holdsworth, S. Kalacska, L. Balogh, J-S Park, A. S. Sologubenko, X. Maeder, S. Kabra, E. Mazza, E. Hosseini
Summary: Primary creep regeneration (PCR) is a phenomenon observed during stress-varying/cyclic creep loading conditions, where changes in dislocation density and activation of dislocation generation and recovery mechanisms can lead to the regeneration of the primary creep regime. These mechanisms can explain the observed creep strain accumulation in the steel under stress-varying creep loading conditions.
MATERIALS & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
R. Ranga Raj, J. Yoganandh, M. S. Senthil Saravanan, S. Sathiesh Kumar
Summary: This study reports the processing and characterization of graphene-reinforced aluminium alloy 7075 microcomposites and nanocomposites. The nanocomposites have higher density compared to the microcomposites, and their hardness increases proportionally with the addition of graphene. The wear mechanisms of the composites differ, with microcomposites showing abrasive and ploughing wear, while nanocomposites exhibit adhesive wear with delamination and particle pull-out from the material surface.
Article
Chemistry, Physical
Sanghita Basak, Debojyoti Nath, Ratan Das
Summary: In this study, ZnS nanocrystals were prepared using a wet chemical synthesis method. The precursor materials used were Zn(NO3)2 (Zinc Nitrate) and Na2S (Sodium sulfide), with 3-Mercaptopropionic acid as a capping agent. The synthesized ZnS nanocrystals were characterized using HR-TEM and FE-SEM analysis, showing an average particle size of approximately 26 nm. The results indicated the formation of smooth crystalline ZnS nanoparticles with dominance of the (111) plane. The XRD pattern confirmed the dominance of (111) crystalline planes over other planes.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Materials Science, Multidisciplinary
Dikai Guan, Junheng Gao, W. Mark Rainforth
Summary: This study investigated the synthesis of nanostructured AZ31 powder using cryomilling, finding that cryomilling could refine the grain size of particles but also presented limitations in terms of particle agglomeration and processing. Additionally, the hardness of the particles increased significantly after 6 hours of cryomilling.
MATERIALS CHARACTERIZATION
(2021)
Article
Geochemistry & Geophysics
Jacob A. Tielke, Anne H. Peslier, Roy Christoffersen, Timmons M. Erickson, Christopher J. Cline, Ryan S. Jakubek, Mark J. Cintala, Zia Rahman, Marc D. Fries, Pierre Bouilhol
Summary: During shock metamorphism, crystals in olivine develop shock-induced defects, including dislocations, which are influenced by pressure and crystal orientation. The shock-induced dislocations are preserved in meteorites, providing insights into ancient impact events in the solar system.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2022)
Article
Nanoscience & Nanotechnology
Zhanwei Yuan, Fengchun Chang, Aoze Chen, Fuguo Li, Rui Ma, Jie Bai, Junchao Zheng
Summary: The microstructure and mechanical properties of SLM-Hastelloy X alloy treated by hot isostatic pressing and heat treatment (HIP + HT) were studied. The results showed that the grains transformed into equiaxed grains after the HIP + HT process. M23C6 carbide precipitates were distributed in the grains and grain boundaries. The number of precipitates in the grains decreased as the heat treatment temperature increased. The average elastic modulus showed an initial increase and then decrease with the growth of heat treatment temperature, while the average hardness exhibited significant fluctuations with increasing post-treatment temperature. The Vickers hardness decreased with the increase of heat treatment temperature. The study concluded that a good combination of strength and plastic properties of SLM-Hastelloy X alloy was achieved after HIP + HT treatment, except for HIP+1150 degrees C/h.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
X. Li, S. R. Holdsworth, S. Kalacska, L. Balogh, J-S Park, Y. Arroyo Rojas Dasilva, X. Maeder, A. Cocks, E. Mazza, E. Hosseini
Summary: This study investigates the creep behavior and mechanisms of high-temperature components in thermal power plants under stress-varying and cyclic creep conditions in response to the emergence of renewable energy sources. Through experiments and microstructural analysis, it is found that the evolution of dislocation structure can lead to multiple primary creep regeneration, and a new dislocation-based model is formulated to represent the microstructural evolution and mechanical response of the alloy.
Article
Materials Science, Multidisciplinary
Rajan Kushwaha, V. Choudhari, P. Dash, W. Muhammad, S. K. Sahoo, S. Gollapudi, R. K. Sabat
Summary: The micromechanics of precipitation distribution in WE43 alloy was investigated using EBSD and Nye tensor method. It was found that the dislocation density increases during deformation and aging, resulting in a decrease in the sample's dislocation density. Grains of near prismatic orientation require lower dislocation density compared to grains of near basal orientation to form precipitates under the same aging conditions. The higher activity of screw dislocations in near prismatic orientated grains is reflected in the formation of more dislocation debris, accelerating the pipe diffusion and leading to the formation of more precipitates near the grain boundaries.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Ivo Kubena, Stanislava Fintova, Michal Jambor, Miroslav Smid
Summary: This study investigates the microstructural evolution of 304L steel exposed to low cycle straining. The as-received and solution annealed states were studied, with the latter causing grain growth, reduction of chemical heterogeneity, and overall dislocation density. Cyclic hardening and softening were observed, with a pronounced secondary hardening in the final stage of fatigue life. Advanced electron microscopy techniques were used to explore the material behavior in different stages. The techniques were able to visualize fine microstructural features and reveal structure evolution.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Geochemistry & Geophysics
Filippe Ferreira, Lars N. Hansen, Katharina Marquardt
Summary: The study focuses on the plastic deformation and the role of grain boundaries in olivine deformation. Specific types of grain boundaries created by dislocation activity facilitate grain-boundary sliding. With progressive deformation, there is an increase in abundance of apparently slip-transparent boundaries.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Materials Science, Multidisciplinary
M. V. Nataraj, S. Swaroop
Summary: This study investigates the influence of laser shock peening on SS 304 stainless steel. The results show that laser power densities have a significant effect on the residual stress and microhardness of the material. Electron backscattered diffraction and transmission electron microscopy reveal the presence of mechanical twinning and grain refinement. Laser shock peening without coating improves the surface properties of the material, including compressive residual stress, surface roughness, microhardness, and microstructure and grain refinement.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Yuchi Cui, Eda Aydogan, Jonathan G. Gigax, Yongqiang Wang, Amit Misra, Stuart A. Maloy, Nan Li
Summary: The study demonstrates that 5 MeV Fe2+ ion irradiation at 300 degrees C affects the microstructure evolution and deformation behavior of FeCrAl C26M alloy, with dislocation loop density and size increasing with irradiation dose while different crystallographic orientations exhibit variations in slip systems.
Article
Materials Science, Multidisciplinary
Benjamin P. Eftink, Daniel A. Vega, Osman El Atwani, David J. Sprouster, Yung Suk J. Yoo, Todd E. Steckley, Eda Aydogan, Carl M. Cady, Mohamad Al-Sheikhly, Thomas J. Lienert, Stuart A. Maloy
Summary: The research compared the microstructure and mechanical properties of laser powder bed additively manufactured Grade 91 steel to wrought Grade 91 steel, showing that the additively manufactured material exhibited greater strength than the wrought material at room temperature and elevated temperatures.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
T. Mukherjee, T. DebRoy, T. J. Lienert, S. A. Maloy, P. Hosemann
Summary: Metal printing for complex parts requires control of microstructure and properties; process variables affect thermal cycles and hardness; the study provides a basis for tailoring hardness of additively manufactured parts.
Article
Materials Science, Multidisciplinary
C. J. Rietema, T. A. Saleh, D. T. Hoelzer, B. P. Eftink, E. Aydogan, K. D. Clarke, A. J. Clarke, S. A. Maloy
Summary: The study investigates the effects of heat treatment on the workability of 14YWT, as well as the impact of processing history on abnormal grain structures and radial microstructural uniformity. It was found that consolidation via direct extrusion resulted in radial microstructural gradients, and the recommended heat treatment for increased workability with minimal microstructural change is 1150 degrees C for 1 hour.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
C. J. Rietema, M. M. Hassan, O. Anderoglu, B. P. Eftink, T. A. Saleh, S. A. Maloy, A. J. Clarke, K. D. Clarke
Summary: Ultrafine scale intralath V(C,N) precipitates were found in 12Cr-1MoWV steel, with significant impact on strength depending on nitrogen content. Finer precipitates may have implications for irradiated behavior.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
O. El-Atwani, B. P. Eftink, C. M. Cady, D. R. Coughlin, M. M. Schneider, S. A. Maloy
Summary: AM-Grade 91 steel shows high strength, ductility, and enhanced creep resistance at high temperatures compared to wrought Grade 91 steel. However, the complex microstructure of this steel may increase the ductile-to-brittle transition temperature.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Calvin Robert Lear, Jonathan Gregory Gigax, Matthew M. Schneider, Todd Edward Steckley, Thomas J. Lienert, Stuart Andrew Maloy, Benjamin Paul Eftink
Summary: In this study, capacitive discharge resistance welding (CDRW), a solid-state variant of resistance welding, was used to successfully join nanostructured ferritic alloys (NFAs). The resulting solid-state joints were hermetically sealed and showed minimal microstructural changes. These findings are significant for solid-state welding research in cladding applications and similar NFAs materials.
Article
Chemistry, Multidisciplinary
Osman El-Atwani, Hyosim Kim, Jonathan G. Gigax, Cayla Harvey, Berk Aytuna, Mert Efe, Stuart A. Maloy
Summary: This study utilized large strain machining to manufacture nanostructured HT-9 steel with enhanced thermal stability and mechanical properties, demonstrating through in-situ transmission electron microscopy the thermal stability and the possibility of tuning material strength and ductility. The results suggest the potential of producing controlled nanocrystalline materials through a scalable and cost-effective method, with a need for further understanding of the morphology dependence on machining conditions.
Article
Chemistry, Multidisciplinary
Osman El-Atwani, Hyosim Kim, Cayla Harvey, Mert Efe, Stuart A. Maloy
Summary: This study highlights the limitations of thermal stability analysis using in-situ transmission electron microscopy (TEM)-annealing experiments on ultrafine and nanocrystalline materials. By comparing in-situ TEM experiments with bulk material annealing experiments on nanocrystalline pure copper and HT-9 steel, they found different outcomes for pure copper but similar results for HT-9 steel. The discussion focuses on the necessity of comparing in-situ TEM annealing experimental results to bulk annealing for material thermal stability assessment.
Article
Nanoscience & Nanotechnology
Andac Ozsoy, Eda Aydogan, Arcan F. Dericioglu
Summary: TiN-reinforced 17-4 PH stainless steel was produced using selective laser melting (SLM), resulting in a fine and equiaxed microstructure with improved mechanical properties. The addition of TiN particles shifted the SLM processing window to higher energy densities. The incorporation of TiN was found promising for high-temperature applications in the future.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Manufacturing
E. Aydogan, O. El-Atwani, B. Erdem, M. Li, A. Devaraj, B. Koc, W. -Y. Chen, A. Maloy
Summary: This study investigates the microstructure of a modified Inconel 718 alloy produced by laser powder bed fusion before and after in-situ Kr irradiation. It is observed that the microstructure changes, with different types and sizes of defects, after irradiation at different temperatures. The composition of both the matrix and second phase particles remains similar after irradiation. The superior radiation resistance of this alloy is attributed to the presence of fine cell boundaries stabilized by the second phase particles produced by additive manufacturing.
ADDITIVE MANUFACTURING
(2022)
Article
Chemistry, Physical
Jonathan G. Gigax, Matthew R. Chancey, Dongyue Xie, Hyosim Kim, Yongqiang Wang, Stuart A. Maloy, Nan Li
Summary: Small disks are commonly used in nuclear reactor environments but limit the types of mechanical testing that can be performed. Shear punch testing has been used to evaluate changes from neutron irradiation, and a new microshear specimen geometry has been developed for heavy-ion irradiated specimens.
Article
Materials Science, Multidisciplinary
Youxing Chen, Di Chen, Jordan Weaver, Jonathan Gigax, Yongqiang Wang, Nathan A. Mara, Saryu Fensin, Stuart A. Maloy, Amit Misra, Nan Li
Summary: Co-free but Al-included medium/high entropy alloys (M/HEAs) have attracted attention for their lower cost and the ability to tune multi-phase microstructures. In this study, the irradiation response of two Co-free HEAs, FCC CrFeMnNi and BCC AlCrFeMnNi, was explored. It was found that radiation-induced segregation and intermixing were minimal in the AlCrFeMnNi alloy, while limited voids were detected in the CrFeMnNi alloy. Additionally, the FeCrMn-rich nanoprecipitates in AlCrFeMnNi showed superior structural stability against irradiation.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Hwasung Yeom, David Hoelzer, Stuart Maloy, Kumar Sridharan
Summary: The cold spray deposition process was used to manufacture 14YWT oxide-dispersion strengthened (ODS) steel with gas-atomized and ball-milled feed-stock powders. The gas-atomized powder resulted in a thick dense deposit, but annealing above 900 degrees C led to grain growth and heterogeneous precipitation, resulting in lower hardness. The ball-milled powder, after cryomilling and annealing, produced smaller particle sizes and lower hardness, suitable for cold spray deposition, resulting in thick and dense deposits with a favorable microstructure. The cold spray deposits exhibited fine grain sizes and uniform dispersion of Y-Ti-O nanoprecipitates, with hardness values of 770 HV and 496 HV.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
A. Dong, H. Vo, E. Olivas, J. Bickel, C. Hardie, P. Hosemann, S. Maloy
Summary: Small scale mechanical testing has gained attention for materials research, but extending the results to larger scale applications remains difficult. This study tested different materials and thicknesses, revealing significant reductions in material properties at smaller thicknesses. The changes varied across materials and indicated the coupling of geometric and microstructural effects. Finite element analysis revealed potential flaws in using certain sample geometries for extreme aspect ratios, and there were discrepancies in values at different length scales.
JOURNAL OF NUCLEAR MATERIALS
(2023)
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)
