Review
Materials Science, Multidisciplinary
Nadezhda Dudova
Summary: This paper provides an overview of the creep strength and microstructural features of 9% Cr and 10-12% Cr martensitic steels with high B and low N contents, achieved through modifying the chemical composition. The optimal B/N ratio in steels is discussed, and the creep properties are compared with those of traditional B and N content steels. The relationship between the stability of lath structure and precipitates and the creep strength of steels is also explored, along with future prospects of this alloying modification.
Article
Nanoscience & Nanotechnology
A. Weidner, K. Fischer, H. Biermann
Summary: The study investigated the mechanical behavior, microstructure, and texture development of ultrafine-grained austenitic TRIP steels with different austenite stabilities. Through thermo-mechanical processing, a significant increase in yield strength was achieved due to the ultrafine-grained microstructure. The observed Lueders band phenomenon and texture evolution provide insights into the deformation behavior of these steels.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Multidisciplinary
M. Jakubowska, A. Wrobel, W. Manaj, A. Sypien
Summary: This paper presents the results of structure and mechanical tests on the low-alloy steel 14MoV6-3, which exhibited internal damage after long-term creep service. Mechanical properties, such as tensile strength, yield strength, and brittle transition temperature, were tested according to standards for pressure equipment. It was observed that the strength properties decreased with increasing service time. Microscopic tests using SEM revealed that cavitation cracking was the cause of damage. The study of the microstructure was also conducted using the EBSD method, providing important parameters for analyzing structural changes in fatigue and creep processes.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2023)
Article
Nanoscience & Nanotechnology
Guosheng Sun, Jizi Liu, Yuntian Zhu
Summary: By introducing a bi-modal heterostructure, Luders deformation in UFG 304 stainless steel can be effectively suppressed, leading to improved ductility and toughness without sacrificing strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Review
Materials Science, Multidisciplinary
Pavel Dolzhenko, Marina Tikhonova, Marina Odnobokova, Rustam Kaibyshev, Andrey Belyakov
Summary: The aim of this review is to summarize recent achievements in the development of ultrafine-grained austenitic/ferritic stainless steels through large strain deformation. The paper discusses various methods of large strain deformation for producing ultrafine-grained metallic materials. It also explores the structural mechanisms responsible for grain refinement during plastic deformation and examines the physical and mechanical properties of ultrafine-grained stainless steels. The review concludes that the development of ultrafine-grained microstructures during severe plastic deformation is a result of continuous dynamic recrystallization, with the misorientations among strain-induced cells/subgrains progressively increasing.
Article
Materials Science, Multidisciplinary
Genqi Tian, Bo Mao, Yuantao Xu, Liming Fu, Zuogui Zhang, Yanfeng Wang, Aidang Shan
Summary: High-temperature strength and microstructure stability in heat-resistant steels are major concerns. Understanding microstructure evolution and mechanical property degradation during creep exposure is important for safety operations. This study conducted interrupted creep tests on 9% Cr steels at 873 K and studied the degradation of mechanical properties and microstructure evolution. The results provided insights into the mechanisms of degradation and stability of these steels.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Metallurgy & Metallurgical Engineering
Michael Rhode, Jonathan Nietzke, Tim Richter, Tobias Mente, Peter Mayr, Alexander Nitsche
Summary: This study investigates the microstructure and heat treatment effects on the mechanical properties of P92 base material and P91 multi-layer weld metal, as well as establishing a fracture criterion dependent on hydrogen and microstructure. All investigated microstructures show a degradation of mechanical properties compared to hydrogen-free samples, with the as-welded P91 weld metal exhibiting the highest degree of degradation in the presence of hydrogen. The P91 PWHT weld metal and P92 base material exhibit comparable properties.
WELDING IN THE WORLD
(2023)
Article
Metallurgy & Metallurgical Engineering
Michael Rhode, Tim Richter, Tobias Mente, Peter Mayr, Alexander Nitsche
Summary: Martensitic 9% Cr steels like P91 and P92 exhibit susceptibility to delayed hydrogen assisted cracking depending on microstructure. Effective hydrogen diffusion coefficients are used to evaluate possible time delay. Different methods were used to calculate diffusion coefficients, showing that sample thickness must be considered as it impacts the results.
WELDING IN THE WORLD
(2022)
Review
Chemistry, Multidisciplinary
Lin Zhang, Xingyu Li, Xuanhui Qu, Mingli Qin, Zhongyou Que, Zichen Wei, Chenguang Guo, Xin Lu, Yanhao Dong
Summary: Ultrafine-grained (UFG) refractory metals are promising materials for various applications, but achieving full density while maintaining a fine microstructure through sintering remains challenging. This article provides an overview of sintering issues, microstructural design rules, and powder metallurgy practices for UFG and nanocrystalline refractory metals. It also reviews previous efforts, including the use of fine/nanopowders and field-assisted sintering techniques, and highlights the recent technological breakthrough of pressureless two-step sintering for producing dense UFG refractory metals. Additionally, the progress of powder metallurgy in specific materials systems, such as elementary metals and refractory alloys, is discussed, and future developments towards UFG and nanocrystalline refractory metals with improved properties are outlined.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yumeng Tan, Xiaowei Wang, Zitong Kang, Fei Ye, Yefeng Chen, Dewen Zhou, Xiancheng Zhang, Jianming Gong
Summary: Creep lifetime prediction is critical for high-temperature component design, but achieving high accuracy is challenging due to various influencing factors. In this study, machine learning models were utilized to predict creep lifetime by considering variables such as material chemical compositions, heat treatment conditions, and creep test conditions. A model coupled with the Larson-Miller parameter demonstrated the best prediction performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Jakub Veverka, Frantisek Lukac, Andrzej P. Kadzielawa, Martin Koller, Zdenek Chlup, Hynek Hadraba, Miroslav Karlik, Dominik Legut, Jirina Vontorova, Tomas Chraska, Monika Vilemova
Summary: The application of non-equilibrium methods such as Mechanical Alloying and Field Assisted Sintering enables the formation of a single solid solution in immiscible systems. Using W-Cr solid solution as an intermediate step, ultrafine-grained composite alloys with rod-like microstructural features can be produced, leading to a significant increase in strength without an increase in hardness.
Article
Nanoscience & Nanotechnology
Gong Na, Nasrin Farzana, Wang Yong, Wu Huibin, Keffer David, Maroulas Vasileios, Rios Orlando
Summary: The study utilized electron backscatter diffraction analysis to investigate the effect of annealing temperature on the fraction of high-angle grain boundaries and Schmid factor in nano/ultrafine-grained 18Cr-8Ni stainless steel. By employing persistent homology, the study reduced the dimensionality of information describing the complex processing-structure-property relationship. Results showed that different annealing temperatures lead to different crystal structures, resulting in varying mechanical properties of the steel.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Igor Velkavrh, Joeel Voyer, Fevzi Kafexhiu, Bojan Podgornik
Summary: Coarsening of precipitates in 9-12 wt.% Cr steels significantly influences their creep, friction, and wear behaviors after aging, with the number and size of precipitates playing a crucial role in determining the mechanical properties of the steels. The study shows that prior to aging, the steel matrix morphology governs the creep rate and tribological performance, while after aging, the combination of the number and size of precipitates becomes an additional factor in determining the mechanical properties of the steels.
Article
Engineering, Mechanical
Pei-Shan Ding, Xiao-Tao Zheng
Summary: The creep-ratcheting behavior of advanced 9-12 % Cr ferritic steel at 600 degrees C under different peak holding times was investigated, and a corresponding creep-ratcheting constitutive model was developed. Results showed that the anelastic strain remains relatively constant for different holding times, but decreases rapidly during the last several cycles. Moreover, the study observed the behavior of primary creep regeneration during repeated loading and unloading, which remains almost the same with increasing number of cycles.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
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
Materials Science, Multidisciplinary
Zenji Horita, Daisuke Maruno, Yukimasa Ikeda, Takahiro Masuda, Yongpeng Tang, Makoto Arita, Yuji Higo, Yoshinori Tange, Yasuo Ohishi
Summary: This study applied severe plastic deformation through high-pressure sliding on pure Ti to examine the allotropic transformation. It was found that straining by high-pressure sliding processing was effective in promoting phase transformation and maintaining the transformed phase, while the reverse transformation from omega phase to alpha phase is controlled by thermal energy.
MATERIALS TRANSACTIONS
(2021)
Article
Materials Science, Multidisciplinary
Marie Kvapilova, Petr Kral, Jiri Dvorak, Vaclav Sklenicka
Summary: The study compared the creep properties of nickel-based superalloys, including creep behavior, fracture mode, and deformation mechanism. Results showed that MAR-M247 exhibited the best creep properties, followed by B1914 and INC713 LC. All three alloys met the requirements for high temperature components.
Article
Materials Science, Multidisciplinary
Takahiro Masuda, Shoichi Hirosawa, Zenji Horita
Summary: In this study, an earlier version of the continuous HPT (CHPT) process was further developed to simultaneously process two wires for grain refinement. The modified CHPT process using enlarged anvils achieved a grain size reduction in pure Al to around 1 μm and in the Al-2% Fe alloy to around 400 nm, with a tensile strength of 280 MPa and an equivalent strain of around 25 introduced through the process. The study suggests the feasibility of using multiple wires in the CHPT process when the anvil diameter is increased.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Yoshifumi Ikoma, Terumasa Yamasaki, Takahiro Masuda, Yoshinori Tange, Yuji Higo, Yasuo Ohishi, Martha R. McCartney, David J. Smith, Zenji Horita
Summary: In situ observation using synchrotron X-ray diffraction was conducted to study the phase transformation in Si containing diamond-cubic and metastable phases during annealing. Metastable body-centred-cubic and hexagonal diamond phases were identified at different annealing temperatures, suggesting a phase transformation mainly from bc8 to hd during the process.
PHILOSOPHICAL MAGAZINE LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Vaclav Sklenicka, Petr Kral, Kveta Kucharova, Marie Kvapilova, Jiri Dvorak, Lubos Kloc
Summary: The study aims to investigate the creep and fracture behavior of a sponge-based modified Zr1%Nb cladding alloy in the alpha-Zr and (alpha+beta)-Zr phase regions. Through constant load creep tests and metallographic analyses, it was found that there is a close relationship between creep deformation and fracture, with different final fracture modes and fracture strain values observed in different phase regions.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Takahiro Masuda, Kazushige Fujimitsu, Kosei Sumikawa, Takahiro Kajita, Yongpeng Tang, Shoichi Hirosawa, Yoichi Takizawa, Manabu Yumoto, Yoshiharu Otagiri, Zenji Horita
Summary: This study investigates the strain distribution in the high-pressure sliding processing for rods of pure Al and an AZ61 alloy, revealing the preferential introduction of strain in an oblique direction and suggesting solutions for improving the homogeneous strain distribution.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Petr Kral, Jiri Dvorak, Vaclav Sklenicka, Zenji Horita, Yoichi Takizawa, Yongpeng Tang, Lubomir Kral, Marie Kvapilova, Pavla Roupcova, Jakub Horvath
Summary: Creep behavior of S304H austenitic steel improved significantly at 500 degrees C after high-pressure sliding (HPS) processing, but deteriorated at 600 degrees C and 700 degrees C. The creep behavior was found to be related to the thermal stability of the processed microstructure.
Article
Materials Science, Multidisciplinary
Jiri Pechousek, Erno Kuzmann, Rene Vondrasek, Anna Olina, Vlastimil Vrba, Lukas Kouril, Tomas Ingr, Petr Kral, Miroslav Mashlan
Summary: This study investigated low-alloy 42CrMo4 steels using various testing methods and found that grinding and polishing of metallographic samples has a significant impact on the final results.
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
Materials Science, Multidisciplinary
Evander Ramos, Takahiro Masuda, Zenji Horita, Suveen Mathaudhu
Summary: This study characterized the electrical conductivity of pure copper discs processed by HPT and found that the conductivity varied with strain in agreement with literature and expectations based on grain boundary evolution. The spiral conductivity testing method introduced in this study can improve the characterization of HPT materials in future studies.
Article
Chemistry, Physical
Jiri Dvorak, Petr Kral, Andrey G. Kadomtsev, Vladimir I. Betekhtin, Maria V. Narykova, Marie Kvapilova, Vaclav Sklenicka
Summary: The commercial purity of VT1-0 titanium was processed using the rolling process to obtain an ultrafine-grained microstructure. Static annealing after processing led to a significant decrease in creep properties. The control creep mechanisms were determined based on the value of steady-state creep rate. Titanium prepared at elevated and room temperatures exhibited higher creep strength compared to titanium prepared at cryo-temperatures. Post-SPD annealing resulted in a significant decrease in creep properties.
Article
Nanoscience & Nanotechnology
Marie Kvapilova, Marie Ohankova, Petr Kral, Jiri Dvorak, Kveta Kucharova, Josef Cmakal, Vaclav Sklenicka
Summary: The effect of service degradation on the microstructure and creep properties of a 0.5%Cr-0.5%Mo-0.3%V steel steam pipe after 77,900 hours of accumulated service time was investigated. The results showed that the dispersion of fine vanadium carbides played a significant role in the high creep resistance of the steel. However, the coarsening of vanadium carbides during creep resulted in a weakening of the precipitation hardening and a decrease in creep resistance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Lenka Kuncicka, Michal Jambor, Petr Kral
Summary: By optimizing the fabrication method, copper components with both advantageous electric conductivity and favorable mechanical properties can be acquired. In this study, the effects of different deformation conditions on the structure and properties of copper were investigated. It was found that deformation under cryogenic conditions resulted in refined structure and improved mechanical and electric behaviors compared to deformation at room temperature.
Article
Materials Science, Multidisciplinary
P. Kral, J. Dvorak, V Sklenicka, T. Masuda, Y. Tang, Z. Horita, L. Kuncicka, K. Kucharova, M. Kvapilova, M. Svobodova
Summary: The creep behavior of P92 steel at 923 K deformed by rotary swaging (RS) and high-pressure torsion (HPT) was studied, revealing that both microstructures coarsen with increasing creep time and strain. Creep strain accelerates the coarsening, especially in the HPT-processed state, affecting the creep mechanism. RS-processed P92 steel showed faster creep rate and higher ductility compared to coarse-grained (CG) state, although at high stresses, it exhibited similar creep behavior to CG state.
KOVOVE MATERIALY-METALLIC MATERIALS
(2021)
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)
