Article
Materials Science, Multidisciplinary
Chaomin Zhang, Yong Jiang, Yanjun Zhou, Xiuhua Guo, Kexing Song
Summary: Interface structure modeling and first-principles calculations were performed to investigate the segregation behaviors of Zr micro-alloying element at nano-Cr particle interfaces and low-Sigma Cu grain boundaries in CueCreZr alloys. The results showed that Zr can substitute Cu atoms at nano-Cr interfaces with the Nishiyama-Wassermann orientation relation, but not at interfaces with the Kurdjumove-Sachs orientation relation. Zr segregation at low-Sigma grain boundaries greatly improved the binding strength.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
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
Chemistry, Physical
Jinshui Chen, Xiangpeng Xiao, Dawei Yuan, Chengjun Guo, Hao Huang, Bin Yang
Summary: Columnar crystal structure was formed in the Cu-Cr-Zr alloy during thermo-mechanical treatment, resulting in optimized microstructure and significantly refined grains. The alloy with columnar crystal structure and higher Zr content exhibited improved mechanical properties, while maintaining relatively stable electrical conductivity. The ultimate tensile strength was significantly higher after cold drawing in the alloy with a higher Zr content. Discussions and conclusions were made regarding the grain refinement mechanism and strengthening mechanism.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
J. P. Qu, S. P. Yue, W. S. Zhang, X. H. Chen, Z. K. Guo, B. W. Dong, Z. Ren, J. C. Jie, T. J. Li
Summary: In this study, the effect of Si addition on precipitation behavior and properties of Cu-Cr-Zr-Si alloy was investigated through experiments and theoretical calculations. The results showed that the addition of Si accelerated the precipitation of Cr-rich phase and reduced the migration energy of Cr in Cu. In addition, the addition of Si also lowered the Cu/Cr interface energy and delayed the growth of Cr-rich phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Chenying Shi, Muzhi Ma, Biaobiao Yang, Yuling Liu, Yushen Huang, Yong Du
Summary: In this study, the effect of Ti content on the microstructure, mechanical, and electrical properties of Cu-Cr-Zr alloys was investigated. The electrical conductivity decreased with increasing Ti content due to electron scattering. The higher hardness/strength was attributed to higher dislocation density and finer FCC-Cr precipitates. Thermodynamic and kinetic calculations showed that increasing Ti content facilitated the nucleation of FCC-Cr but hindered its growth process.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Raul I. Arriaga-Benitez, Mihriban Pekguleryuz
Summary: The influence of Mn, Cr and Zr on the creep behavior of an Al-Si-Mg-Cu alloy intended for Diesel engine applications was studied. Two alloys, MG1 and MG2-1, were creep tested at 300-350℃ and 28 MPa in the T7 heat-treated and soaked condition. The activation energy for creep was higher in MG2-1 compared to MG1. The creep mechanisms differed between the two alloys, with MG2-1 showing lower creep rates due to thermally activated restoration processes and Zener pinning by αMG2-1-Al(Mn,Cr,Fe)Si.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Kai Zhao, Tong Gao, Huabing Yang, Kaiqi Hu, Guiliang Liu, Qianqian Sun, Jinfeng Nie, Xiangfa Liu
Summary: The addition of TiC nano-particles in high-strength aluminum alloy 7050 leads to significant grain refinement and improved mechanical properties through growth restriction effect and heterogeneous nucleation. The alignment of TiC nano-particles along extrusion direction after subsequent heat treatment contributes to the enhanced tensile properties, ductility, and refined precipitates in the composite. These synergistic effects result in optimized mechanical properties of TiCp/7050 composite, providing new insights for controlling matrix grains of Zr-containing Al alloys and developing low-cost Al matrix composites.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Xin Tong, Guohua Wu, Liang Zhang, Wencai Liu, Wenjiang Ding
Summary: This study explored the feasibility of Zr alloying in sand-cast GW83 alloy at a low temperature by applying ZrCl4, which resulted in higher Zr yield compared to using Mg-Zr master alloy. The interaction process between ZrCl4 and Mg melt, as well as the grain refinement mechanisms, were systematically studied. The addition of ZrCl4 led to a decrease in average grain size due to heterogeneous nuclei of Zr particles and constitutional supercooling provided by solute Zr, however, a higher addition of ZrCl4 resulted in the generation of RECl3 inclusions that degraded the mechanical properties of the alloy.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
J. G. Jeon, J. H. Shin, S. E. Shin, D. H. Bae
Summary: By refining the recrystallized grain sizes, the yield strength and elongation of Al-Si-Mg-Cu-based alloy sheets can be improved while reducing anisotropy. Grain refinement leads to random grain orientations, increasing the plastic strain ratio and optimizing formability.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Y. Pan, D. L. Pu, E. D. Yu
Summary: Cr-Si binary silicides are promising advanced functional materials widely used in semiconductors, thermoelectric, and high temperature industries. Structural, mechanical, electronic, and thermodynamic properties of Cr-Si silicides were studied using first-principles. A novel Cr2Si orthorhombic structure was predicted and different silicides showed varying properties, with Cr3Si having larger moduli but Cr2Si exhibiting better ductility and plasticity. These findings provide insight into the comprehensive properties of Cr-Si silicides and guide future improvements in their performance.
Article
Nanoscience & Nanotechnology
J. P. Qu, W. S. Zhang, S. P. Yue, Q. Liu, Z. K. Guo, B. W. Dong, J. C. Jie, Z. Q. Cao, Y. Fu, T. J. Li
Summary: By investigating the influence mechanism of different alloy compositions on high-temperature softening resistance, a new copper alloy was designed and manufactured to improve its high-temperature softening resistance and mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Xiaojun Zhao, Qi Zhong, Pengyuan Zhai, Pengyu Fan, Ruiling Wu, Jianxiao Fang, Yuxiang Xiao, Yuxiang Jiang, Sainan Liu, Wei Li
Summary: In order to improve the wear resistance of high-strength and high-conductivity Cu-Cr-Zr alloys in high-speed and heavy load friction environments, coatings including Ni-Cu, Ni-Cu-10(W,Si), Ni-Cu-10(Mo,W,Si), and Ni-Cu-15(Mo,W,Si) were prepared using coaxial powder-feeding laser cladding technology. The microstructure and wear performance of the coatings were investigated. The presence of silicides in the coatings played an important role in grain refinement and the transformation of wear mechanism from adhesive wear to abrasive wear.
Article
Materials Science, Multidisciplinary
Lanbo Li, Tiechui Yuan, Xiaoxing Yuan
Summary: The addition of Si and Zr as reinforcement phases into Al-Zn-Mg-Cu alloy effectively prevents cracking and improves mechanical properties. Si is found to be very effective in eliminating cracks. The average grain size initially decreases and then increases with increasing Zr content, reaching the minimum (13.8 μm) at 1.0 wt%. The trend of hardness, yield strength, tensile strength, and elongation with Zr content is consistent with the average grain size, reaching the maximum (126 HV, 215.7 MPa, 333.5 MPa, and 2.9%) at 1.0 wt% Zr content, which further increases (Hardness 156 HV, Yield strength 273.7 MPa, tensile strength 392.2 MPa, and elongation 4.4%) after T6 treatment. Therefore, the incorporation of Si and Zr is beneficial for the manufacturing of crack-free microstructure and excellent mechanical properties in the Al-Zn-Mg-Cu alloy.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Siyue Fan, Xuming Guo, Qingwei Jiang, Zhenhua Li, Jing Ma
Summary: This article focuses on a new Al-Cu-Mn-Ti-Zr aluminum alloy fabricated by pulsed gas metal arc additive manufacturing to refine the microstructure and alleviate the mechanical property anisotropy. The investigation shows that T6 heat treatment significantly improves the mechanical properties of the alloy samples, but the formation of pores reduces the elongation.
Article
Chemistry, Physical
Yixiao Wang, Guohua Wu, Liang Zhang, Youjie Guo, Cunlong Wang, Liangbin Li, Xunman Xiong
Summary: In this study, Sc and Ti were added to sand-cast Al-Li-Cu-Mg-Zr casting alloy for the first time. The results showed that the grain size decreased and Cu-rich phase increased with the addition of Sc and Ti. The strength of the alloy was significantly increased by Sc and Ti through the stimulation of T1 and S' phases, finer 8', higher number density of core-shell composites, and narrower 8'-precipitation free zones.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Shipeng Yue, Jianping Qu, Guoliang Li, Shichao Liu, Zhongkai Guo, Jinchuan Jie, Yubo Zhang, Tingju Li
Summary: This study investigated the microstructure evolution and mechanical properties of Cu-3Ag-xZr alloys processed by equal channel angular pressing at room temperature. The results showed that significant grain refinement and excellent comprehensive properties were achieved, which could provide a feasible way for the preparation of high-performance alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Shipeng Yue, Guoliang Li, Jianping Qu, Shichao Liu, Zhongkai Guo, Jinchuan Jie, Shengli Guo, Tingju Li
Summary: In this work, cold drawing deformation was used to improve the strength and electrical conductivity of Cu-20Fe alloy. The microstructure evolution and strengthening mechanisms, as well as the variation in conductivity were investigated. It was found that both Cu matrix grains and Fe-rich dendrites could be refined and transformed into fibrous structure with increasing drawing strain. The resulting alloy exhibited a yield strength of 1173 MPa and an electrical conductivity of 41 %IACS.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Organic
Si-Da Wang, Bo Yang, Hao Zhang, Jian-Ping Qu, Yan-Biao Kang
Summary: In this study, a variety of (hetero)aryl chlorides, bromides, and iodides were reduced to corresponding (hetero)arenes under the irradiation of 407 nm LEDs using sodium formate as reductant and thiol as hydrogen atom transfer agent. The key intermediates, aryl radicals, could be trapped by either hydrogen, phosphite, or borates. The same reduction conditions can also be used for the deprotection of sulfonamides.
Article
Chemistry, Physical
Wenshu Zhang, Xin Jin, Jianping Qu, Siyang Liu, Fangyuan Hu, Xudong Wang, Hao Huang, Man Yao
Summary: Heterostructures composed of transition-metal dichalcogenides and MXene exhibit excellent performance as Na-ion batteries anodes. MoSe2/MXene is shown to have better electrochemical performance than MoS2/MXene. However, MoSeS/MXene performs poorly in overall performance tests.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Mechanical
Bowen Dong, Gaoyu Peng, Zhenpeng Wu, Xingrun Shan, Chengjun Guo, Junwei Miao, Jianping Qu, Wenyan Luo, Jinchuan Jie, Tingju Li
Summary: By studying the Cu-14.7Ni-3.1Al (wt.%) alloys, it was found that with the decrease of aging temperature from 973 K to 773 K, the size of (Ni, Cu)3Al precipitates (L12) in the Cu-rich solid solution (FCC) decreased. The simultaneous increase of tensile strength (from 563 MPa to 729 MPa) and ductility (from 5.4% to 13.5%) was observed. A CALPHAD-MD coupled method was proposed to quantitatively reveal the relationship between microstructures and mechanical properties of the precipitation-strengthening Cu-Ni-Al alloy.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Chemistry, Organic
Yong-Ze Chen, Ting-Hui Ding, Qiang-Qiang Li, Jian-Ping Qu, Yan-Biao Kang
Summary: A direct dehydrogenative C-H cleaving carbonylative lactamization of 2-arylanilines promoted by visible light and potassium bases is reported. Solvent DMF acts as the sole carbonyl source in the absence of an oxidant. The irreversible release of hydrogen gas drags this reaction to the stable phenanthridinone products. This method provides a direct conversion of a broad range of 2-arylanilines to various phenanthridinones, which could be applied in the synthesis of bioactive molecules and organic optoelectronic materials.
Article
Chemistry, Organic
Xian-Peng Cai, Bin-Hong Han, Fu-Tong Cen, Jian-Ping Qu, Yan-Biao Kang
Summary: CBZ6 is a redox-neutral non-donor-acceptor-type organo-photocatalyst with a strong reductive potential (-2.16 V vs SCE). It can function as a photosensitizer for both single-electron transfer and triplet energy transfer processes, allowing for site-selective control in the intramolecular hydroarylation of acrylamides. This process provides a concise and environmentally sustainable access to a series of oxindoles and dihydroquinolinones without the use of transition metals, halogen-containing reagents, or additional reductants or oxidants.
Article
Chemistry, Organic
Guo-Qing Jiang, Bin-Hong Han, Xian-Peng Cai, Jian-Ping Qu, Yan-Biao Kang
Summary: An iron-catalyzed direct aerobic alpha,beta-dehydrogenation of carbonyls has been reported using tert-butyl nitrite and N-hydroxyphthalimide as the co-catalyst system. This method allows for the production of a wide range of lactams, flavanones, lactone, and thiochromen-4-one in high yields without the need for extra transition metal reagents.
Article
Biochemistry & Molecular Biology
Jian-Yu Wang, Qiu-Yue Li, Li Ren, Cheng Guo, Jian-Ping Qu, Zheng Gao, Hui-Fang Wang, Qian Zhang, Bo Zhou
Summary: Octanoic acid is a nematicide that affects the energy metabolism, lifespan, and signaling of Meloidogyne incognita. It primarily targets the cuticle, lysosomes, and extracellular regions of the nematodes. Nematodes can tolerate low concentrations of octanoic acid by up-regulating defense enzymes and alternative metabolic pathways.
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
(2023)
Article
Chemistry, Organic
Bin-Hong Han, Yu Sun, Xian-Peng Cai, Jian-Ping Qu, Yan-Biao Kang
Summary: Salicylaldehyde is found to be an efficient photocatalyst for the intermolecular transalkylation of phthalimide in this study. The well-designed dimethyl N-hydroxyphthalimide ester serves as a good alkylation reagent, inhibiting the competing intramolecular alkylation of the alkylating reagent and enabling the site-specific synthesis of N-substituted phthalimide.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Yong-Ze Chen, Yi-Ming Chen, Yuan Hu, Jian-Ping Qu, Yan-Biao Kang
Summary: This study reports a tandem transalkylation-cyclization reaction catalyzed by the super organoreductant CBZ6, using amines as traceless radical donors and stabilizers. The breaking of an N-C bond in the later stage allows transalkylation with a secondary amine as the leaving group. Various tertiary amines were successfully employed as alkyl radical donors. Additionally, the use of this traceless stabilizer enables transalkylation with methyl radical, which is typically unstable and difficult to use.
Article
Chemistry, Organic
Xian-Chao Cui, Hu Zhang, Hao Zhang, Yi-Ping Wang, Jian-Ping Qu, Yan-Biao Kang
Summary: A method for synthesizing a-hydroxyl and a-amino pyridinyl esters via photoreductive dual radical cross-coupling catalyzed by the super-organoreductant CBZ6 has been developed. Wide range of 2-pyridinylation and 4-pyridinylation reactions of either a-ketoesters or imine derivatives have been achieved. Applications in the synthesis of pyridinyl amino-hydroxyl acids as well as a new chiral oxazoline ligand have also been accomplished.
Article
Chemistry, Organic
Yong-Ze Chen, Ting-Hui Ding, Qiang-Qiang Li, Jian-Ping Qu, Yan-Biao Kang
Summary: This study reports the direct dehydrogenative C-H cleaving carbonylative lactamization of 2-arylanilines promoted by visible light and potassium bases. The solvent DMF serves as the sole carbonyl source without the need for an oxidant. The irreversible release of hydrogen gas leads to the formation of stable phenanthridinone products. This method provides a direct conversion of a wide range of 2-arylanilines into various phenanthridinones, making it useful for the synthesis of bioactive molecules and organic optoelectronic materials.
Article
Chemistry, Multidisciplinary
Xian-Chao Cui, Hu Zhang, Yi-Ping Wang, Jian-Ping Qu, Yan-Biao Kang
Summary: In this study, we report a new photocatalytic method for the 2- or 4-pyridylation of compounds containing O, N, or S groups, using the organic photoreductant CBZ6 and sulfoxides or sulfides as HAT reagents. This is the first base-free version of the alpha-C-H 2-/4-pyridylation of compounds containing ethers, amines, or thioethers.
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)
