Article
Materials Science, Multidisciplinary
Bo Xiao, Haokai Dong, Tao Yang, Shaofei Liu, Shenbao Jin, Boxuan Cao, Yongdian Han, Lei Zhao, Xiawei Yang, Gang Sha, Lianyong Xu
Summary: We present two typical morphologies (elongated- and blocky-shaped) of the Laves phase in tempered martensite ferritic steels during creep process, which are formed through two independent paths: grain boundaries and neighboring M23C6. The presence of multi-element segregation (Cr, Mn, Si, and W) at grain boundaries and adjacent M23C6 provides a source of Laves phase formation. Additionally, different growth mechanisms play crucial roles in the formation of these two morphologies. Our findings enhance the understanding of Laves phase heterogeneous precipitation and offer insights for the development of novel heat-resistant steels with superior creep strength.
MATERIALS RESEARCH LETTERS
(2023)
Article
Mechanics
B. Alfredsson, S. Hazar, J. Lai
Summary: Experimental study on the fracture of martensitic AISI 52100 steel with 12% retained austenite below the tempering temperature showed that slow loading rates resulted in decreased K-Ic and J(C) values by 6% to 23%, while standard rates showed an increase with temperature. Finite element simulations revealed increased crack tip zone with inelastic strains for slow loading rates compared to standard rates, explaining changes in K-Ic due to temperature and loading rate in terms of creep and strain-induced transformation at the crack tip.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Nanoscience & Nanotechnology
Johan Ewald Westraadt, William Edward Goosen, Aleksander Kostka, Hongcai Wang, Gunther Eggeler
Summary: The formation of modified Z-phase in a 12Cr1MoV tempered martensite ferritic steel during creep testing at high temperature and stress was investigated. The results showed that the modified Z-phase precipitated in both the uniformly-elongated gauge and thread regions of the fractured sample. Localized creep-strain strongly promoted the formation of the modified Z-phase.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Review
Nanoscience & Nanotechnology
Jinyi Ren, Changsheng Li, Yahui Han, En Li, Cairu Gao, Chunlin Qiu
Summary: The mechanical properties of 3Cr2MnNiMo mold steel are significantly affected by the initial martensite and tempered carbide characteristics. Changes in temperature result in variations in the initial microstructure and grain size, affecting tensile properties and impact absorbed energy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Tomotaka Hatakeyama, Kota Sawada, Kaoru Sekido, Kazuhiro Kimura
Summary: The effect of the M23C6 phase on the grain boundary in the initial microstructure of pre-aged 25Cr-20Ni-Nb-N steel on creep deformation and fracture behavior was investigated. Aging at temperatures of 873 K, 923 K, and 973 K resulted in different area fractions of M23C6 precipitates on the grain boundary, with corresponding effects on time to rupture and creep elongation. The improved creep properties after aging at 973 K can be attributed to the high area fraction of precipitates, which fragmented the crack propagation path and retarded intergranular creep fracture.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
H. Wang, A. Kostka, W. E. Goosen, G. Eggeler, J. E. Westraadt
Summary: The study investigated a 12% Cr TMFS after creep testing at high temperature for 139,000 hours, using an extraction replica technique to analyze particle families and explore the chemical evolution of particles. The results were discussed in comparison with previous thin foil data and computational thermodynamics predictions, highlighting the strengths and weaknesses of thin foil and replica procedures, and suggesting improvements for thermodynamic databases.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Vahid Javaheri, Sakari Pallaspuro, Saeed Sadeghpour, Sumit Ghosh, Johannes Sainio, Renata Latypova, Jukka Komi
Summary: This study discusses the tensile and fracture toughness properties, as well as the microstructural evolution, of a medium-carbon, low-alloy steel under different rapid tempering conditions. The results indicate that tempering temperature has a significant influence on the mechanical properties and microstructural features, regardless of the holding time. By properly designing the rapid tempering process, a combination of high tensile properties and fracture toughness can be achieved compared to conventional tempering.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Wanlin Wang, Ce Liang, Jie Zeng, You Zhou, Botao Chen, Hang He
Summary: This study investigated the solidification structure evolution of a high-carbon steel billet during continuous casting under different cooling intensities. The results showed that the corner part had finer microstructures and higher mechanical properties compared to the center surface, with a unique spheroidized structure that significantly improved the steel's mechanical properties. Furthermore, laboratory experiments confirmed the formation mechanism of tempered sorbite in the billet corner under strong cooling intensity.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Kazuki Okuno, Kenichi Takai
Summary: Factors promoting hydrogen-related intergranular fracture in tempered martensitic steel's elastic region were identified through frozen-in hydrogen distribution and tensile tests at -196°C. Results showed hydrogen embrittlement associated with intergranular fracture after precharging with hydrogen, while hydrogen embrittlement was also observed after preloading with elastic stress just before fracture strength at room temperature. The study revealed that reversibly accumulated hydrogen due to stress-induced diffusion onto prior austenite grain boundaries during stress loading at room temperature was responsible for intergranular fracture.
Article
Materials Science, Multidisciplinary
Yankun Wang, Qingshuang Ma, Qiuzhi Gao, Hailian Zhang, Huijun Li, Ziyun Liu, Minglong Gong
Summary: This study investigates the microstructure evolution and mechanical properties of high-Cr martensitic heat-resistant steel under different tempering conditions, and discusses the precipitation and strengthening behavior of M23C6 carbides. The results show that the contribution of M23C6 carbides to yield strength varies with tempering temperature.
Article
Metallurgy & Metallurgical Engineering
Yongjie Zhang, Mitsutaka Sato, Goro Miyamoto, Tadashi Furuhara
Summary: The precipitation of nano-sized alloy carbides in steels with a large amount of strengthening can be obtained through conventional tempering of martensite or interphase precipitation during isothermal ferrite transformation. Comparatively, tempered martensite shows higher yield strength and smaller uniform elongation than ferrite under the same conditions. Multiple characterization techniques demonstrate finer crystallographic grain size, higher dislocation density, and relatively coarser dispersion of nano-sized precipitates in tempered martensite compared to ferrite.
ISIJ INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
C. G. Shang, M. L. Wang, Z. C. Zhou, Y. H. Lu
Summary: In this study, creep tests were conducted on 9Cr3W3Co steel at 650°C under 155-220 MPa in air and water vapor environments. The results showed that water vapor did not affect the creep deformation mechanism, but influenced the creep behaviors and life depending on the stress level. High stress levels in water vapor resulted in a decrease in steady-creep rate and an increase in steady-creep stage time, while low stress levels led to an increase in steady-state creep rate and a decrease in the time of steady-state creep stage. The interaction of different stresses and creep environments induced different forms of creep damage, affecting the creep fracture process and creep life.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Yihua Dou, Wenlan Wei, Yinping Cao, Lu Cui
Summary: The segregation of solid solution atoms affects the dislocations movement during low cycle fatigue, and the finer lath subgrain structure of 90H steel makes it easier to occur in grain, thus improving the fatigue life.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Materials Science, Multidisciplinary
Danqi Zhang, Gang Liu, Xinjun Sun
Summary: The impact energy of 0.02C-7Mn steel at -40 degrees C was strongly influenced by the grain boundary (GB) wetting transition, with lower tempering temperatures leading to embrittlement of GBs and intergranular fracture mode. Tempering between 580 degrees C and 650 degrees C resulted in a ductile fracture mode due to the transformation induced plasticity (TRIP) effect.
Article
Engineering, Mechanical
Yuxuan Song, Ting Yu, Hongyu Chen, Weiya Jin, Zengliang Gao, Tekalign Terfa Debela, Zhenggang Wu, Yi Ma
Summary: This study investigated the effect of creep-fatigue on fracture behavior of P92 steel using nanoindentation technology. The results showed that the fracture mechanism changed from fatigue-dominant to creep-fatigue interactive damage with increasing dwell time. A damage indicator was proposed to characterize the fracture mechanism quantitatively.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Multidisciplinary
Anastasiia Dolzhenko, Alexander Pydrin, Sergey Gaidar, Rustam Kaibyshev, Andrey Belyakov
Summary: The effect of tempforming on the microstructure, carbide precipitation, and strengthening mechanisms of high-strength low-alloyed steel has been analyzed. Decreasing the tempforming temperature resulted in a reduction in grain and carbide particle size, leading to an increase in yield strength.
Article
Materials Science, Multidisciplinary
N. Yurchenko, E. Panina, A. Belyakov, G. Salishchev, S. Zherebtsov, N. Stepanov
Summary: High-entropy intermetallics show great potential for high-temperature applications, but there is limited information on their plastic flow behavior and deformation mechanisms. A yield strength anomaly was observed in a refractory AlNbTiVZr0.25 high-entropy alloy during compression tests, possibly connected to the glide of dissociated a (111) superdislocations.
Article
Materials Science, Multidisciplinary
Anastasiia Dolzhenko, Marina Tikhonova, Rustam Kaibyshev, Andrey Belyakov
Summary: This article critically reviews the effect of large-strain cold-to-warm deformation on the microstructures and mechanical properties of various steels and alloys. The focus is mainly on the microstructure evolution, with cursory consideration of deformation textures. The study covers a wide strain range, from early straining to severe deformations, providing a clearer understanding of how deformation mechanisms affect the structural changes leading to the final microstructures evolved in large strains. General regularities of microstructure evolution are shown for different deformation methods, including conventional rolling/swaging and special techniques such as equal channel angular pressing or torsion under high pressure. The article also reveals and discusses important mutual relationships between microstructural parameters, such as grain size vs. dislocation density, and pays particular attention to the mechanisms responsible for grain refinement during microstructure evolution under large strain deformation. The development of an ultrafine-grained microstructure during large strain deformation is considered in terms of continuous dynamic recrystallization, and its regularities are compared with conventional (discontinuous) dynamic recrystallization and grain subdivision (fragmentation) phenomenon. The article quantitatively represents the structure-property relations for structural strengthening, taking into account various mechanisms of dislocation retardation.
Article
Materials Science, Multidisciplinary
M. V. Odnobokova, A. Belyakov, N. A. Enikeev, R. O. Kaibyshev, R. Z. Valiev
Summary: Warm rolling at 473 K significantly strengthens a 304L austenitic stainless steel, with a total reduction up to 65%. The warm rolled steel exhibits outstanding mechanical properties and impact toughness, especially at low temperatures.
Article
Materials Science, Multidisciplinary
Anna Bodyakova, Roman Mishnev, Andrey Belyakov, Rustam Kaibyshev
Summary: This study investigates the phase content and strengthening mechanism of two copper alloys, 0.1Cr-0.1Zr and 0.9Cr-0.1Zr, and finds that the size of second phase particles and the strengthening mechanism are closely related to the chromium content.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Anastasiia Dolzhenko, Rustam Kaibyshev, Andrey Belyakov
Summary: Low-alloy steel shows improved microstructures and mechanical properties after tempforming treatment. The tempformed steel has smaller grain size and higher dislocation density, resulting in increased yield strength and impact toughness.
Article
Materials Science, Multidisciplinary
E. Tkachev, R. Kaibyshev
Summary: This study investigated a tantalum-alloyed 9%Cr steel with high boron and low nitrogen content after tempering at different temperatures using SEM and TEM methods to characterize the microstructure and precipitates. Experimental observations and thermodynamic calculations showed that tantalum promotes the precipitation of fine MX particles in lath interiors during tempering at temperatures greater than or equal to 750 degrees Celsius, while its effect on M23C6 carbide is minimal. Precipitation and growth kinetics of MX particles at different tempering temperatures were simulated and discussed.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Anna Bodyakova, Maksim Tkachev, Georgy Raab, Rustam Kaibyshev, Andrey N. Belyakov
Summary: The effect of severe plastic deformation through ECAE-Conform and cold rolling on the microstructures of Cu-0.1Cr-0.1Zr alloy was investigated. The results showed that an increase in ECAE-Conform strain improved grain refinement and subsequent cold rolling further led to grain size reduction and strengthening. The fraction of ultrafine grains with a size of 160 nm increased with an increase in the number of ECAE-Conform passes, resulting in a higher yield strength of above 550 MPa.
Article
Nanoscience & Nanotechnology
A. Fedoseeva, E. Tkachev, R. Kaibyshev
Summary: The creep behavior of 9% Cr martensitic steels with different W, N, and B contents was studied at 650 degrees C. The results showed a breakdown in creep strength and a change in apparent stress exponent at applied stresses ranging from 140 to 120 MPa. The threshold stresses, estimated by extrapolation, decreased at the transition from high stress to low stress regions. The sources of these threshold stresses were believed to be dislocations, carbides, and phase particles.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Pavel Dolzhenko, Marina Tikhonova, Marina Odnobokova, Rustam Kaibyshev, Andrey Belyakov
Summary: The study investigates the change in the grain boundary network during recrystallization and grain growth in a 316L austenitic stainless steel, noting an increase in interruptions per grain with increasing grain size.
Article
Metallurgy & Metallurgical Engineering
Anastasiia Dolzhenko, Andrey Belyakov, Rustam Kaibyshev
Summary: The fracture behavior of high-strength low-alloy steel under different tempforming temperatures was studied through impact and bending tests. Lowering the tempforming temperature promoted grain refinement and led to significant strengthening and increased impact toughness. Delamination along the rolling plane during bending resulted in high impact toughness due to easy cleavage crosswise to the impact direction. The delamination behavior varied depending on the tempforming temperature, with the sample tempformed at 873 K exhibiting the highest impact toughness at room temperature.
ISIJ INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
E. Tkachev, S. Borisov, A. Belyakov, T. Kniaziuk, O. Vagina, S. Gaidar, R. Kaibyshev
Summary: The relationship between the microstructure and mechanical properties of a 0.25%C-1.6%Si-1.5Mn-0.5%Cr-0.3%Mo steel was studied after quenching and tempering at different temperatures. The steel exhibited a combination of high yield strength (1350 MPa), moderate elongation-to-failure (9%), and good impact toughness (60 J/cm2). The precipitation of different carbides at different tempering temperatures affected the strength and toughness of the steel, with higher tempering temperatures leading to decreased strength and increased toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Evgeniy Tkachev, Sergey Borisov, Yuliya Borisova, Tatiana Kniaziuk, Sergey Gaidar, Rustam Kaibyshev
Summary: Quenching and partitioning (Q&P) treatments of 0.25C steel can create microstructures with improved balance of mechanical properties. The combination of bainitic transformation and carbon enrichment during partitioning leads to the coexistence of irregularly shaped retained austenite (RA) islands embedded in bainitic ferrite and film-like RA in the martensitic matrix. The best strength-toughness combinations were achieved by quenching the steel samples to 210-230 degrees C and subjecting them to partitioning at 350 degrees C for 100-600 s, resulting in tempered lath martensite mixed with finely dispersed and stabilized RA and particles of ?-carbide.
Article
Crystallography
Evgeniy Tkachev, Andrey Belyakov, Rustam Kaibyshev
Summary: A 9%Cr martensitic steel with Ta and B additions undergoes thermo-mechanical treatment (TMT) and tempering at different temperatures. TMT with tempering at T >= 700 degrees C substantially improves impact toughness, with tempering at 780 degrees C showing the best results. The improved impact toughness is attributed to the uniform dispersion of precipitates and favorable crystallographic texture.
Article
Crystallography
Evgeniy Tkachev, Sergey Borisov, Yuliya Borisova, Tatiana Kniaziuk, Rustam Kaibyshev
Summary: The impact of quenching and partitioning processing on the strength, ductility, and fracture toughness of a specific steel composition was studied. The presence of different structural constituents in the steel resulted in no clear correlation between strength, ductility, and fracture toughness.
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)
