Article
Chemistry, Physical
Weiwei Huang, Jinyuan Tang, Weihua Zhou, Jun Wen, Mohan Yi
Summary: Ultrasonic vibration-assisted grinding (UVAG) has been investigated using a molecular dynamics (MD) model to study the effect of vibration directions on the process. The results show that UVAG reduces grinding force and leads to higher instantaneous grinding forces compared to conventional grinding. Radial vibration is detrimental to surface smoothness, while axial vibration contributes to reducing surface roughness. Dislocation mediation and lattice rotation are the primary plastic deformation mechanisms in UVAG.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Dongmei Pu, Shifen Wu, Hong Yang, Xianhua Chen, Jianbo Li, Xiaowei Feng, Kaihong Zheng, Fusheng Pan
Summary: Ti particles (5 wt%) reinforced AZ91 Mg matrix composites (TiP/AZ91 composites) were prepared by powder metallurgy, resulting in improved strength and ductility compared with AZ91 alloy. The UTS significantly increased from 163 MPa to 221 MPa, and the elongation increased from 3.5% to 10.9%. The YS and hardness decreased due to slightly coarser grain size. The microstructural analysis showed uniform dispersion of Ti particles in the Mg matrix, with reduced Mg17Al12 content and formation of an Al3Ti layer at the edge of Ti particles. EBSD analysis revealed the presence of tensile twins and dislocations during tensile deformation, which contributed to the improved elongation of TiP/AZ91 composites.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Paper & Wood
Sara Johansson, Jonas Engqvist, Johan Tryding, Stephen A. Hall
Summary: In this study, the microstructural evolution and macroscopic stress-strain responses of paperboard during uniaxial compression were studied using synchrotron tomography. The results showed that the deformation mainly occurred near the sample surfaces, and the volume of both fibre walls and pores decreased during loading. The stored elastic energy in fibre walls could potentially drive the elastic recovery of the fibre network during unloading.
Article
Materials Science, Multidisciplinary
Matti Isakov, Veera Langi, Lalit Pun, Guilherme Correa Soares, Innokenty Kantor, Mads Ry Vogel Jorgensen, Mikko Hokka
Summary: This paper presents a methodology that combines mechanical tests with synchrotron X-ray diffraction measurements to study the loading rate dependency of mechanically induced phase transformations in steels. The experiments were conducted at the DanMAX beamline with a custom-made tensile loading device and in-situ optical imaging system. The results demonstrate the feasibility of this methodology by providing novel data on the kinetics of the martensitic phase transformation in EN 1.4318-alloy following a rapid increase in strain rate.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Hao Liu, Xinbao Zhao, Yong Yuan, Yingying Dang, Weiqi Li, Jiachen Xu, Yuan Cheng, Quanzhao Yue, Yuefeng Gu, Ze Zhang
Summary: The influence of long-term thermal exposure on the microstructure evolution and tensile behavior of a new wrought y'-hardened Ni-base superalloy has been investigated. The results show that discontinuous carbides precipitate at the grain boundaries and spherical y' precipitates disperse uniformly within the y matrix after heat treatment. During thermal exposure, the y' precipitates remain spherical morphology and their coarsening behavior follows the LSW model. The tensile strength of the experimental superalloy generally decreases with the increase of tensile temperature after heat treatment, while the elongation reaches its maximum at 650 degrees C. After thermal exposure, the tensile strength of the experimental superalloy improves while the elongation slightly decreases.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Haoze Li, Min Li, Zhihui Cai, Lifeng Ma, Yingche Ma
Summary: By adding yttrium, the properties of Fe-6.5 wt.% Si steel were improved. The increase in yttrium content led to more high-melting precipitates, finer microstructure, and higher tensile ductility. The deformation mechanism varied at different temperatures.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Ceramics
Wenpeng Lou, Xiuqing Li, Shizhong Wei, Qi Wang, Jingkun Liang, Liangdong Chen, Liujie Xu, Yucheng Zhou
Summary: Cu-W composites reinforced by nano-Y2O3 particles were prepared via ball milling and spark plasma sintering. With increasing Y2O3 content, the distribution of Y2O3 changed and the grain size decreased. The composites showed improved mechanical properties, high density and electrical conductivity.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Sirui Huang, Hao Wu, Heguo Zhu, Zonghan Xie
Summary: By introducing NbTiC2 particles into the high entropy alloy matrix composite, the tensile strength can be significantly improved. Although the ductility of the composite is lower, it still maintains an acceptable value. Dislocation strengthening, loading bearing effect, and Orowan mechanism play a positive role in enhancing the tensile properties of the high entropy alloy.
Article
Materials Science, Multidisciplinary
C. Rudolf, R. Goswami, W. Kang, J. Thomas
Summary: Uniaxial tension tests were conducted on pure polycrystalline copper, iron, and titanium specimens with varying current levels, showing non-thermal current effects in titanium but not in copper and iron. Potential mechanisms for the observed electrically-assisted deformation (EAD) effects in titanium were suggested, offering new avenues for research in understanding EAD of metals.
Article
Materials Science, Multidisciplinary
Tianbo Yu, Yan Du, Guohua Fan, Ruqing Xu, Rozaliya Barabash, Niels Hansen, Xiaoxu Huang, Yubin Zhang
Summary: A study revealed an ultra-low-strain deformation microstructure in the annealed laminated Ti-Al composite for the first time, showing the crucial role of thermal stress in the formation of the microstructure.
Article
Chemistry, Physical
Tongfei Zou, Meng Liu, Yifan Cai, Quanyi Wang, Yunqing Jiang, Yunru Wang, Zhenheng Gao, Yubing Pei, Hong Zhang, Yongjie Liu, Qingyuan Wang
Summary: In this study, uniaxial tensile tests were conducted on additive manufacturing 939 superalloy at various temperatures to investigate its mechanical properties, fracture behaviors, and deformation mechanisms. The experimental results showed a significant decrease in yield, tensile strength, and elongation with increasing temperature. The fracture surfaces exhibited plastic fracture characteristics at room temperature and multiple slip systems were observed at higher temperatures. The deformation mechanism was primarily controlled by single slip system at room temperature, while thermal energy activated more slip systems and promoted dislocation movement at intermediate temperatures, and large-scale stacking faults and dislocation by-passing and climbing mechanisms were observed at high temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Md Lokman Ali
Summary: The addition of transition metals enhances the lattice distortion and yield strength of the CrCoNi alloy, while maintaining high ductility and strengthening ability. The relationship between atomic displacement and critical resolved shear stress for these alloying systems was approximately linear, indicating the universality of the results. These simulation findings are valuable for future development and research of CrCoNi-based quaternary alloys with improved mechanical properties.
Article
Nanoscience & Nanotechnology
Ping Liu, Shuai Chen, Qing-Xiang Pei, Zachary H. Aitken, Wanghui Li, Yong-Wei Zhang
Summary: This study investigates the mechanical properties of AlxCoCuFeNi HEAs composites reinforced with AlNi3 nanoparticles using large-scale molecular dynamics simulations. The results show that the AlNi3 nanoparticles can enhance the ultimate tensile strength and ultimate tensile strain of the composite by suppressing phase change and dislocation appearance in the HEA matrix. The study also reveals the underlying reason for the lower-bound relation between Young's modulus, ultimate tensile strength, and ultimate tensile strain by following the rule of mixtures.
Article
Multidisciplinary Sciences
Shuai Chen, Ping Liu, Qingxiang Pei, Zhi Gen Yu, Zachary H. Aitken, Wanghui Li, Zhaoxuan Wu, Rajarshi Banerjee, David J. Srolovitz, Peter K. Liaw, Yong-Wei Zhang
Summary: This study constructs nanolamellar high-entropy alloys and explores their mechanical properties using molecular dynamic simulation and density functional theory calculation. The results show that the nanolamellar structure exhibits ideal plastic behavior and remarkable shape memory effect, highlighting the importance of nanolamellar structures in controlling the mechanical and functional properties of high-entropy alloys.
Article
Polymer Science
Dongmei Huang, Yun Dong, Hang Guo, Erjie Yang, Yiwen Chen, Mi Luo, Ziwen Pan, Jiandang Liu, Liangbin Li, Hongjun Zhang, Bangjiao Ye
Summary: Using the newly developed high count rate positron annihilation lifetime spectroscopy (PALS) facility, in situ PALS experiments were performed for the first time on the continuous stretching process of polymers to analyze the minute-scale evolution of free-volume holes. The tensile process was divided into four distinct stages based on the stress-strain relationship and PALS results, showing the enlargement of free-volume hole size and increasing anisotropy of free-volume holes. This work demonstrates the feasibility of disclosing the minute-scale evolution of material microstructure through in situ PALS experiments.
Article
Engineering, Mechanical
Matthew Northam, Quentin Fouliard, Lin Rossmann, Jun-Sang Park, Peter Kenesei, Jonathan Almer, Vaishak Viswanathan, Bryan Harder, Seetha Raghavan
Summary: The current standard application method for thermal barrier coatings (TBCs) on turbine blades for jet engines is electron-beam physical vapor deposition (EB-PVD). An emerging deposition method, plasma-spray physical vapor deposition (PS-PVD), offers a faster and less expensive alternative with a tailorable microstructure. By comparing lifetime behavior of both coatings, it was found that PS-PVD coatings showed greater variation in in-plane room temperature strain in the thermally grown oxide (TGO) layer after cycling, while both coatings exhibited similar high-temperature strain and no spallation after 600 thermal cycles. Microscopy imaging showed that PS-PVD coatings had more rumpling and different failure modes in the TGO layer compared to EB-PVD coatings. The tailorability of PS-PVD coatings enables adjustments to improve overall performance and bridge the differences between the two deposition methods.
JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME
(2023)
Article
Nuclear Science & Technology
Abdellatif M. Yacout, Kun Mo, Aaron Oaks, Michael Billone, Yinbin Miao, Jeffrey Alicz
Summary: The article introduces the application of metallic fuel in advanced SFRs and the establishment of a metallic fuel database. It also explains the process and methods of qualifying metallic fuel data based on a Quality Assurance Program Plan.
NUCLEAR TECHNOLOGY
(2023)
Article
Chemistry, Physical
Jianqiang Wang, Sheng Liu, Bin Xu, Mingyue Sun, Xiang Liu, Dianzhong Li, Yiyi Li
Summary: This study investigates the effect of high temperature thermal aging treatments on the microstructural stability of a 9Cr ODS alloy. The results show that the microstructure is relatively stable during thermal aging at 1000 degrees C but changes significantly at 1200 degrees C. The formation of 8-ferrite occurs within 50 h of aging at 1200 degrees C, but it completely disappears after 200 h. Additionally, the nano-sized oxide particles coarsen slightly at 1000 degrees C and significantly at 1200 degrees C after aging for more than 20 h. These findings highlight the importance of controlling the HCB and hot working processes to maintain the stability of the microstructure and nano-sized oxide particles in 9Cr ODS alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Tianyi Chen, David Frazer, Mack Cullison, Fei Teng, Jie Lian, Kun Mo, Fabiola Cappia
Summary: Microcantilever bending tests were conducted on uranium dioxide samples irradiated by 84 MeV Xe ions, and different levels of grain subdivision and dislocation development were observed near the irradiated surface depending on the initial grain sizes. These radiation damage features degraded the fracture properties of both samples. The paper discussed the fundamental aspects of the radiation-microstructure-property relationships, considering microcantilever bending data, fractography, and microstructures. The separate effects of irradiation-induced grain subdivision and dislocations on the fracture initiation and propagation of uranium dioxide were also discussed. It was observed that radiation-induced dislocations and grain subdivision, without the presence of Xe bubbles co-located with the defects, caused reductions in Young's modulus, fracture strain, and fracture stress, and a transition to intergranular fracture.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Miao Song, Jingfan Yang, Xiang Liu, Laura R. Hawkins, Zhijie Jiao, Lingfeng He, Yongfeng Zhang, Daniel Schwen, Xiaoyuan Lou
Summary: Compositionally-graded austenitic 316L stainless steel samples with different Hafnium concentrations were additively manufactured and irradiated to evaluate void evolution. The results showed that the void size, density, and swelling decrease with increasing Hf concentration. Atom probe tomography revealed Hf dissolution in the matrix, supporting the use of microalloying to develop void swelling resistant materials.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Nuclear Science & Technology
Yinbin Miao, Kun Mo, Tingzhou Fei, Yan Cao
Summary: Advanced microreactors are expected to provide reliable energy solutions for off-grid regions and space applications. A novel fast neutron spectrum heat pipe microreactor concept has been proposed, featuring molten U-Mn fuel and heat pipes for heat removal. The reactor is self-regulated, relying solely on reactivity feedbacks from fuel temperature. Multi-physics simulations were conducted to investigate the self-regulating performance of the optimized molten metal fuel microreactor, demonstrating its exceptional and inherent safety features.
NUCLEAR ENGINEERING AND DESIGN
(2023)
Article
Nuclear Science & Technology
Emily Shemon, Yinbin Miao, Shikhar Kumar, Kun Mo, Yeon Sang Jung, Aaron Oaks, Scott Richards, Guillaume Giudicelli, Logan Harbour, Roy Stogner
Summary: The U.S. Department of Energy's NEAMS program has developed physics solvers for reactor analysis using the open-source MOOSE framework. The MOOSE Reactor module adds open-source functionality for meshing reactor geometries and improves user workflows. This module provides support for hexagonal pins, assemblies, and cores, extended Cartesian geometry, and automatic tagging of regions for easier post processing. The meshes can be directly used in MOOSE-based applications or exported for other solvers.
NUCLEAR SCIENCE AND ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Jiacheng Ge, Peng Luo, Zhenduo Wu, Wentao Zhang, Sinan Liu, Si Lan, Jonathan D. Almer, Yang Ren, Xun-Li Wang, Weihua Wang
Summary: Studying the flow behavior of amorphous solids is crucial for understanding their deformation mechanism, but detecting basic flow events in these materials is challenging. Using simultaneous SAXS/WAXS experiments, researchers have identified elementary flow carriers in wound metallic glasses, with a radius of gyration ranging from 2.5 to 3.5 nm, based on flow-induced structural heterogeneities. The size of these carriers increases and their morphology changes from spherical to rod-like during flow. Additionally, the atomic structure undergoes an unusual change to a more disordered state during winding/annealing at a temperature around 0.8 Tg. This work provides an atomic-to-nanoscale description of flow carriers in amorphous solids during deformation.
MATERIALS RESEARCH LETTERS
(2023)
Article
Nuclear Science & Technology
Vincent Laboure, Javier Ortensi, Nicolas Martin, Paolo Balestra, Derek Gaston, Yinbin Miao, Gerhard Strydom
Summary: We propose a multiphysics model of the High Temperature Engineering Test Reactor for analysis of past and future loss-of-forced-cooling (LOFC) experiments. The model combines various approaches, including 3-D full-core superhomogenization-corrected neutronics, 3-D full-core homogenized or semi-heterogeneous heat transfer (macroscale), 2-D axisymmetric fuel rod heat transfer (pin-scale), and 1-D thermal-hydraulics channels. The model predicts the time and magnitude of the first power peak after re-criticality with reasonable accuracy. The novel aspects of our work include a new approach for heat transfer coupling, determination of a radial effective thermal conductivity, and preliminary study of the reactor's behavior following a LOFC event.
ANNALS OF NUCLEAR ENERGY
(2023)
Article
Nuclear Science & Technology
Yinbin Miao, Aaron Oaks, Kun Mo, Shipeng Shu, Nicholas Fassino, Christopher Matthews, Stephen Novascone, Abdellatif M. Yacout
Summary: This study presents a framework for evaluating the swelling model of low-burnup SFR metallic fuel using BISON. The framework utilizes experimental data from the Integral Fast Reactor program and enables standardized and automated use of legacy metallic fuel irradiation data.
NUCLEAR ENGINEERING AND DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Shipeng Shu, Yinbin Miao, Bei Ye, Kun Mo, Laura Jamison, Sumit Bhattacharya, Aaron Oaks, Abdellatif M. Yacout, Jason Harp, L. Amulya Nimmagadda, Sanjiv Sinha
Summary: This study investigates the thermal conductivity of U3Si2 that has been amorphized by ion irradiation. The results show that the thermal conductivity of amorphous U3Si2 is significantly lower than that of crystalline U3Si2, which is consistent with previous research findings.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
