Article
Engineering, Mechanical
Yunho Kim, Minju Kang, Gary Simpson, Matthew Shaeffer, Justin Moreno, Daniel Magagnosc, L. J. Kecskes, J. T. Lloyd, K. T. Ramesh
Summary: This study investigates the behavior of magnesium alloys under high-speed impact through experiments and simulations. The experiments reveal the formation of a non-isotropic debris cloud after impact and rupture, which is influenced by the projectile material and impact velocity. The simulations show good agreement with the experimental results, indicating that the anisotropic strength response of magnesium plays a significant role in the formation of the debris cloud.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Weigui Zhang, Kun Li, Runqiang Chi, Susheng Tan, Peijie Li
Summary: This study elucidated the microstructural evolution and deformation behaviors of a gradient textured AZ31B Mg alloy plate under ultrahigh strain rates generated by a two-stage light gas gun. Hypervelocity impact cratering behaviors were mainly affected by the inertia and strength of the target material. Dynamic recrystallization, twinning, and cracking were identified as the main deformation behaviors for the AZ31B Mg alloy to absorb shock wave energy and release stress generated by hypervelocity impacts.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
J. X. Wei, H. Yan, B. Y. Liu, Z. W. Shan, Y. Z. Mao, R. S. Chen
Summary: This study investigates the room temperature microscopic fracture behavior of a cast Mg-Gd-Y alloy. The results show that cleavage microcracks act as the dominant cracking mode in this alloy, occurring preferentially in grains with favorable orientations and independent of normal stress. The revealed fracture mechanism improves our understanding of the relationship between mechanical properties and microstructure in Mg-RE alloys.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Qiangbing Liu, Jiaxuan Ma, Shiyu Luan, Jinhui Wang, Shuai Yuan, Li Han, Peipeng Jin
Summary: The temperature damping capacities of Mg-3Al-1Zn-xSn alloys were investigated using a DMA, and the effects of Sn concentration and loading frequency were examined. The addition of Sn resulted in shifts in the damping peaks, indicating the influence of second phases near grain boundaries. The enhanced damping capacity at different frequencies was attributed to increased point defects and precipitates before 220°C, while microplastic internal friction dominated the damping mechanism in the later part of the test.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Lin Pi, Junjie He, Xinpei Zhang, Yang Chen, Ming Liang, Guangjie Xue, Xiaoyu Yang, Meng Xing, Kai Xiong, Shunmeng Zhang, Yong Mao
Summary: The effect of Li element on the microstructure and texture evolutions of Mg-2Zn alloy sheet during room temperature bending was investigated. The addition of 3 wt.% Li modified the texture of the extruded Mg-2Zn sheet, resulting in improved bendability. The TD-elongated texture distribution provided more efficient deformation modes during bending, releasing the thickness strain more effectively compared to the extruded Mg-2Zn sheet.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Multidisciplinary Sciences
Changjian Yan, Yunchang Xin, Xiao-Bo Chen, Daokui Xu, Paul K. Chu, Chaoqiang Liu, Bo Guan, Xiaoxu Huang, Qing Liu
Summary: The study demonstrates that ultrafine grained Mg alloys with dense twins exhibit high strength and reduced corrosion rate compared to conventional ultrafine grains, achieved through a carefully designed multi-directional compression treatment refining grain size down to 300nm. This technique not only decreases micro-galvanic corrosion tendency, but also completely suppresses severe localized corrosion.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Yu-Qiang Jiang, Y. C. Lin, Guan-Qiang Wang, Guo-Dong Pang, Ming-Song Chen, Zhi-Chao Huang
Summary: The microstructure evolution of a Ti-55511 alloy deformed at high temperatures and wide strain rate range was studied, and a unified constitutive equation was established to describe the evolution of flow stress, grain size, and dynamic recrystallization fraction. Experimental results showed different structures were formed within the alloy under different deformation conditions, with DRX fraction and sub-grain size changing with increasing deformation temperature and strain rate.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Jufu Jiang, Jian Dong, Minjie Huang, Ying Wang, Wenwen Zhao
Summary: The semi-solid thixotropic behavior and microstructure evolution of the deformed CoCrCu1.2FeNi high entropy alloy (HEA) were investigated under isothermal deformation conditions. The results showed that the alloy exhibited a typical stress-strain curve at low strain rates, and two peaks appeared at higher strain rates. The apparent viscosity decreased with increasing shear rate and deformation temperature, indicating shear thinning effect. Semi-solid compression led to uneven plastic deformation, and the microstructure varied in different deformation zones. The roundness of grains increased and then decreased with temperature, while the grain size fluctuated in the large deformation zone. The phase structure remained unchanged during semi-solid deformation but could weaken the segregation of Cu at low temperatures and low strain rates. The strain rate was the main factor affecting recrystallization.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Jingyu Jiang, Feng Jiang, Menghan Zhang, Keke Yi
Summary: In this study, the effects of two severe plastic deformation (SPD) methods, ECAP and FSP, on the microstructure evolution and tensile strength of an Al-6Mg-0.4Mn-0.25Sc-0.1Zr alloy were comparatively studied. The results show that ECAP has a stronger grain refining effect than FSP, and both methods will change the distribution and morphology of Al3(Sc, Zr) particles. The yield strength of the ECAP sample is higher than that of the FSP sample, but the elongation after fracture is slightly less than that of the FSP sample.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Wei Zhang, Hong-jun Hu, Hui-ling Zhang, Hui Zhao, Yang Li, Zhongwen Ou
Summary: In this paper, a new fabrication technique called tube extrusion expander shear (TEES) was proposed for Mg-3Al-1Zn (AZ31) magnesium alloy tube based on the existing extruded shear (ES) technique. Finite-element modeling (FEM) was used to simulate the TEES forming process. Electron back-scattered diffraction (EBSD) was employed to study the microstructures and textures evolution of AZ31 magnesium alloy during TEES process. The results indicated that TEES process effectively refines grain size, weakens basal texture, improves hardness and plasticity of the tube, and activates multiple slip systems.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Qiang Wang, Xiyu He, Yunlai Deng, Jiuhui Zhao, Xiaobin Guo
Summary: The softening mechanism and microstructure evolution of 2A14 aluminum alloy were studied through isothermal deformation tests, showing that the quantity of sub-grains increased with the decrease of deformation temperature or the increase of deformation strain rate. The correlations between the deformation conditions and the geometrically necessary dislocation (GND) and stored strain energy were illuminated with quantification.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
T. Liu, X. G. Wang, W. L. Li, Y. Zhang, C. K. Yu, K. Cui
Summary: The article demonstrates the genetic impact of Mg-Zr intermediate alloys using ZK60 extrusion plates. The results show that the homogenous distribution of submicron and nanoscale Zr particles is crucial for the quality of the ZK60 alloy. It reveals the genetic impact of intermediate alloys in the preparation of magnesium alloys.
Review
Metallurgy & Metallurgical Engineering
Ahmad Bahmani, Mehrab Lotfpour, Milad Taghizadeh, Woo-Jin Kim
Summary: Magnesium (Mg) alloys have advantages and disadvantages. Severe plastic deformation (SPD) can improve the microstructure and enhance the strength and formability of Mg alloys. However, the effects of SPD on the corrosion of Mg alloys are controversial. Therefore, it is important to review the literature on the corrosion properties of Mg alloys prepared by SPD and understand the mechanisms controlling their corrosion behavior.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Junyi Lei, Lifeng Ma, Weitao Jia, Qichi Le, Hucheng Pan, Yuan Yuan
Summary: The study examines the micro-structure evolution of AZ31B Mg alloy under the new hot constrained compression method compared with single compression test. It discusses the effects of strain rate, temperature, and constraining material on the equivalent stress and strain, damage distribution, and deformation zone structure of the alloy. Results show that the constrained compression method produces a special deformation zone, with the ductility of the constraining material strongly influencing the degree of structural deformation in each zone.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Mechanical
Longhui Chen, Chunhui Liu, Peipei Ma, Jianshi Yang, Lihua Zhan, Minghui Huang
Summary: Deformation anisotropy is a key factor affecting the dimensional accuracy and performance consistency of aluminum alloy components. Understanding and modeling the anisotropic creep ageing behavior is crucial for precise creep age forming. In this study, creep ageing responses were investigated in a heavily cold-rolled Al-Cu alloy, revealing significant in-plane creep anisotropy and slight anisotropy of yield strength. Microstructural analysis showed that the strong creep anisotropy is mainly determined by the preferential alignment of dislocation cells. A mechanism-based constitutive model was established to accurately describe the in-plane creep anisotropy.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Jin-Kui Meng, Li Liu, Jian-Tang Jiang, Guo Huang, Liang Zhen
Summary: The fracture behaviors and mechanisms of metallic materials under biaxial stress were investigated. It was found that under quasi-uniaxial tension, normal fracture occurred, while under equi-biaxial tension, both normal and secondary shear fractures were observed. The lower strain hardening ability in the rolling direction introduced large shear stress in the 45 degrees direction, contributing significantly to the secondary shear fracture. An anisotropy parameter K was proposed for the first time to predict the fracture path.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Mengtian Zhang, Hao Li, Junxiang Chen, Fei-Xiang Ma, Liang Zhen, Zhenhai Wen, Cheng-Yan Xu
Summary: In this study, a self-sacrificing template strategy was developed to fabricate high metal loading cobalt single atoms and atomic clusters on nitrogen-doped graphene. The resulting catalyst exhibited enhanced electrocatalytic activity for oxygen reduction reaction, outperforming Pt/C catalysts. It also showed excellent performance in zinc-air batteries, indicating great potential for energy storage applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Xiaoya Wang, Guoai Li, Qiyao He, Jiantang Jiang, Dongfeng Li, Wenzhu Shao, Liang Zhen
Summary: The intergranular corrosion in a partially recrystallized 2A97 Al-Cu-Li alloy at different tempers was investigated. It was found that the T6-tempered alloy was susceptible to intergranular and intersubgranular corrosion, while the T8-tempered alloy showed reduced sensitivity to IGC and ISGC. In the T8-tempered alloy, intragranular pitting was the dominant corrosion mechanism. The distribution of precipitates and solutes at grain and subgrain boundaries were analyzed using TEM, STEM-EDX, and APT to understand the key factors influencing localized corrosion.
Article
Engineering, Environmental
Mengtian Zhang, Hao Li, Fei-Xiang Ma, Liang Zhen, Yue Du, Cheng-Yan Xu
Summary: Electrochemical energy storage/conversion using hydrogen as an energy carrier shows promise for addressing the energy crisis. A hybrid fuel cell, alkali/acid fuel cell, has been developed for hydrogen production and power generation, requiring efficient electrocatalysts for the cathodic hydrogen evolution reaction (HER). In this study, IrCo single atom alloy catalysts encapsulated in nitrogen-doped carbon nanotubes (IrCo@NCNTs) were prepared as cathode catalysts for the alkali/acid hybrid fuel cell. The IrCo@NCNTs exhibited low overpotentials for HER in both acidic and alkaline electrolytes, achieving improved mass activity compared to Pt/C.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Xueqiao Li, Weijian Li, Zhaohua Miao, Chenxi Lu, Hongna Ma, Yan Xu, Deyan Gong, Cheng-Yan Xu, Zhengbao Zha
Summary: The degradation mechanism of stanene in an oxygenated water environment is water-accelerated oxidation, facilitated by H2O molecules that enable electron transfer from stanene to O2 and react with defect sites of stanene. Protective strategies, such as alcohol protection, are proposed to mitigate oxidation. Furthermore, stanene shows potential biomedical applications as a NIR-II photonic agent for tumor ablation, with a high tumor-growth inhibition ratio.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Wenwu Zhang, Penghao Zhang, Dashi Lu, Hao Pan, Xiangli Liu, Chengyan Xu, Jun Wei, Mingyu Li, Hongjun Ji
Summary: Ag-Cu bimetallic nanoalloy integrates the advantages of nano-Ag in reducing migration and cost, and nano-Cu in alleviating oxidation, making it a promising bonding material for power electronic packaging. The Ag-coated Cu nanoparticles paste achieves high-quality bonding at 250 degrees C, forming a supersaturated Ag-Cu nanoalloy joint with ultrahigh shear strength. The interface, characterized by interstitial solid solutions with atomic-level metallurgical bonds, predominantly promotes the shear strength. Additionally, the presence of ultrafine nanograin, low angle grain boundaries, and Cu nanoprecipitates in the joint contributes to the improvement of subordinately.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Electrochemistry
Qiyao He, Jiantang Jiang, Xiaoya Wang, Junzhou Chen, Wenzhu Shao, Liang Zhen
Summary: The intergranular corrosion of 2024-T3 aluminum alloy, related to hydrogen permeation, was investigated in this study. Atom probe tomography was used to observe the precise position of hydrogen atoms in relation to grain boundaries. The study found that the distribution of hydrogen is highly related to the S-phase at grain boundaries and hydrogen pre-charging significantly improves the charge transfer efficiency at the initial stage of intergranular corrosion process.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Instruments & Instrumentation
Xuan Zhao, Jie-Ying Li, Lei Wang, Xue-Yin Sun, Li Yang, Wen-Zhu Shao, Tao Yuan, Cheng-Yan Xu, Liang Zhen
Summary: The effects of neutron irradiation and high temperature on the magnetic properties and structure of Sm2Co17 permanent magnets were investigated. The phase composition in Sm2Co17 permanent magnets remained unchanged after neutron irradiation. Neutron irradiation had almost no influence on the intrinsic coercivity and magnetic flux of Sm2Co17 permanent magnets. However, high temperature led to a significant deterioration in the magnetic properties of Sm2Co17 permanent magnets.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2023)
Article
Chemistry, Multidisciplinary
Fei-Xiang Ma, Zheng-Qi Liu, Guobin Zhang, Hong-Shuang Fan, Yue Du, Liang Zhen, Cheng-Yan Xu
Summary: A self-sacrificing template strategy is developed to fabricate single-atom Fe-N-C hollow microspheres with ultrathin nanosheets, which exhibit high oxygen reduction reaction (ORR) performance and stability. When used as air-cathode catalysts, they show significantly higher power density and discharge capacity compared to commercial Pt/C.
Article
Chemistry, Multidisciplinary
Mengtian Zhang, Hao Li, Junxiang Chen, Fei-Xiang Ma, Liang Zhen, Zhenhai Wen, Cheng-Yan Xu
Summary: A hybrid catalyst with low-level loading of atomic Pt and Co species encapsulated in nitrogen-doped graphene (Pt@CoN4-G) is developed, which shows low overpotential for both hydrogen evolution reaction and oxygen reduction reaction. The catalyst exhibits improved activity and stability, making it suitable for applications in fuel cells and batteries.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Liang Ma, Zengyan Wei, Chen Zhao, Xiangyu Meng, Honglei Zhang, Meixiu Song, Yaming Wang, Baoqiang Li, Xiaoxiao Huang, Chengyan Xu, Ming Feng, Peigang He, Dechang Jia, Yu Zhou, Xiaoming Duan
Summary: Researchers have developed a simple, low-cost, and scalable method to synthesize trimetallic (Fe, Co, Ni) spinel/carbon/nickel foam electrodes with superhydrophilic/superaerophobic properties. These electrodes demonstrate excellent performance in removing oxygen bubbles and exhibit low overpotentials and long-term stability during electrochemical water splitting.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Physics, Applied
Zhao-Yuan Sun, Yang Li, Ze Zhao, Shou-Xin Zhao, Jia Zhang, Liang Zhen, Cheng-Yan Xu
Summary: The oxidation of GaSe to form amorphous Ga2O3-x as a tunneling layer in GaSe/InSe vdWs heterostructure devices is demonstrated. It shows robust charge trapping and releasing ability and enables positive and negative persistent photocurrent characteristics. The achieved OFF/ON current ratio of up to 10^7 in this material is several orders of magnitude larger than that in other vdWs materials and heterostructure devices, leading to the realization of optical memory with 14 distinct current levels and low power consumption.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Environmental
Rui Yin, Chen Zhang, Youyou Chen, Yu Wang, Qiang Feng, Yaming Liu, Minghan Yu, Yunhuan Yuan, Cheng-Yan Xu, Feihua Liu, Weiwei Zhao
Summary: This study presents the development of a transient and recyclable gelatin hydrogel with remarkable mechanical resilience, conductivity and printability, achieved by integrating reduced graphene oxide (rGO) into gelatin. The gelatin hydrogel with rGO exhibits improved fracture stress and conductivity, enabling its use in electromagnetic shielding and resistive/capacitive sensors. The hydrogel also demonstrates permeability, photothermal healability, and washability, making it a promising material for flexible electronics.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Jing-Kai Qin, Hai-Lin Sun, Pei-Yu Huang, Yang Li, Liang Zhen, Cheng-Yan Xu
Summary: In this work, ultra-thin titanium trisulfide (TiS3) nanosheets were synthesized using space-confined vapor method, and a TiS3-TiOx-TiS3 in-plane heterojunction was fabricated for memristor applications using laser manufacturing. The memristor device showed reliable analog switching behaviors due to flux-controlled migration and aggregation of oxygen vacancies, allowing incremental adjustment of channel conductance by tuning the programming voltage. The device exhibited excellent linearity and symmetry in conductance change during long-term potentiation/depression processes, and achieved a high accuracy of 90% in pattern recognition task when integrated into a neural network. The results demonstrate the great potential of TiS3-based synaptic devices for neuromorphic applications.
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)
