Article
Chemistry, Physical
Terrence P. Moran, Patricio E. Carrion, Seungjong Lee, Nima Shamsaei, Nam Phan, Derek H. Warner
Summary: This study investigates the efficacy of hot isostatic pressing (HIP) in enhancing the fatigue performance of additively manufactured (AM) Ti-6Al-4V. The limitations of HIP are explored by varying the initial material state through the selection of AM system, powder chemical composition, and process parameters. It is found that the fatigue performance of HIP'd AM Ti-6Al-4V depends on the as-built quality, and differences in common material attributes cannot fully explain the observed discrepancies in performance. Furthermore, exploring HIP parameters outside of ASTM recommendations shows that a reduced temperature and high-pressure treatment significantly improve fatigue performance.
Article
Materials Science, Multidisciplinary
C. Tahri, Th. Chauveau, A. Hocini, G. Dirras, B. Bacroix
Summary: The study compares the efficiency of three different Hot Isostatic Pressing (HIP) post-treatments in reducing defect density in Ti-6Al-4V alloy parts fabricated through Electron Beam Melting. The HIP treatments include standard HIP, High-Temperature HIP, and two-step HIP. Although all three treatments seal internal porosity and increase material density, they show significant variations in morphology, porosity, and hardness. The decrease in density is mainly attributed to the evolution of chemical composition and crystalline structure.
MATERIALS CHARACTERIZATION
(2023)
Article
Metallurgy & Metallurgical Engineering
Yi Xiao, Li-hui Lang, Wen-cai Xu, De-xin Zhang
Summary: High-quality Ti-6Al-4V powder-solid parts were successfully fabricated using the hot isostatic pressing (HIP) process, which possessed good interfacial strength and mechanical properties.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Nanoscience & Nanotechnology
Yaoxin Huo, Zhengguan Lu, Min Cheng, Jinping Fan, Junwei Qiao, Lei Xu, Ruipeng Guo, Rui Yang, P. K. Liaw
Summary: This study presents the first investigation on the dwell-fatigue behavior and damage mechanism of as-HIPed Ti-6Al-4V powder compact. The results show that the peak stress and stress ratio have significant effects on dwell fatigue behavior. A crack-initiation and propagation model based on soft-hard grain pairs has been proposed to explain the dwell-fatigue mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Haijun Liu, Qiang Wang, Jishi Zhang, Kaihua Xu, Yong Xue
Summary: The hot flow behavior, spheroidization, dynamic recrystallization (DRX), and fusing of lamellar alpha phase were investigated in Ti-6Al-4V titanium alloy during multi-pass deformation. The flow stress values showed a peak followed by different degrees of softening. The flow stress was highly influenced by deformation parameters such as strain, strain rate, and deformation temperature, and the peak value decreased with increased temperature and decreased strain rate. The main softening mechanisms were found to be DRX, spheroidization, and fusion, depending on the number of deformation passes. The spheroidization of the lamellar alpha phase increased with decreased strain rate or increased strain in two-pass deformation at 900°C. However, in three-pass deformation, the degree of spheroidization did not significantly increase with increasing strain, and fusion of lamellar alpha phase of the same orientation occurred instead. The fraction of DRX of the alpha phase was found to be higher than that of spheroidization in three-pass deformation, indicating it as the main softening mechanism.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Haijun Liu, Zhimin Zhang, Kaihua Xu, Jishi Zhang, Yong Xue, Qiang Wang
Summary: The study on a hot isostatic pressed Ti-6Al-4V alloy during multi-pass deformation at variable temperature parameters revealed the microstructural and microhardness evolution, showing significant changes in the deformation mechanisms and phase transformations of the alloy. The results also demonstrated the variations in lamellar alpha phase characteristics, such as rotation, length, thickness, and spheroidization, with an increase in strain rates. Additionally, the contribution of calphal in the integrated hardness during multi-pass deformation was found to be greater at higher deformation temperatures.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
Meili Zhang, Chi-Ho Ng, Ali Dehghan-Manshadi, Chris Hall, Michael J. Bermingham, Matthew S. Dargusch
Summary: Super beta-transus hot isostatic pressing (HIPing) can transform columnar grains to equiaxed grains in additively manufactured Ti-6Al-4V. It is unclear whether super beta-transus HIPing can also generate isotropic microstructure and mechanical properties in high-density additively manufactured Ti-6Al-4V.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Wesley A. Chapkin, Davide L. Simone, Geoffrey J. Frank, Jeffery W. Baur
Summary: Trusses filled with incompressible elastomers or compressible foams show improved mechanical properties, corrosion resistance, and delayed compressive failure compared to unfilled trusses. Foam-filled trusses demonstrate equivalent or better performance in energy dissipation metrics compared to unfilled ones.
MATERIALS & DESIGN
(2021)
Article
Engineering, Mechanical
Fumiyoshi Yoshinaka, Gaoge Xue, Nao Fujimura, Takashi Nakamura
Summary: The study on small crack propagation tests conducted on Ti-6Al-4V specimens under varying vacuum pressures showed that crack initiation life increased and crack propagation rate decreased with decreasing vacuum pressure. Fractographic features varied, with angular surfaces in air and under 10(0) Pa, and granular features below 10(-2) Pa. The window periods formed an oxidized surface coverage which influenced the crack propagation rate and fracture surface features. Surface cracks under 10(-4)-10(-6) Pa exhibited characteristics similar to internal cracks, suggesting a high vacuum environment around the internal cracks.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Materials Science, Multidisciplinary
Zeqi Ren, Wenqi Liu, Qi An, Xiaodong Chen, Guoliang Wei, Run Chen, Rui Zhang, Lujun Huang, Lin Geng
Summary: In this study, TiBw/Ti-6Al-4V composites were designed and fabricated using coarse Ti-6Al-4V powder. The microstructures and tensile properties were investigated, and the strengthening mechanisms were analyzed. The results showed that the composites exhibited high strength and ductility, with a tensile strength of 952 MPa and an elongation of 18.4% at room temperature. Additionally, the composites also showed excellent mechanical properties at high temperatures. This work demonstrates the feasibility of designing low-cost titanium matrix composites using coarse spherical powder and network microstructures.
Article
Engineering, Mechanical
Benjamin Guennec, Amine Hattal, Azziz Hocini, Kamilla Mukhtarova, Takahiro Kinoshita, Noriyo Horikawa, Jeno Gubicza, Madjid Djemai, Guy Dirras
Summary: The first study on the four-point bending fatigue behavior of a Ti-6Al-4V alloy reinforced with 1 wt% nano-yttria-stabilized zirconia processed by laser powder bed fusion was conducted. Comparison between untreated and HIPed specimens showed that HIPed specimens exhibited promising fatigue strength.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Metallurgy & Metallurgical Engineering
Xuejian Lin, Hongjun Huang, Fuyu Dong, Yue Zhang, Xiaoguang Yuan, Bowen Zheng, Xiaojiao Zuo
Summary: Thermal compression testing of particle-reinforced titanium matrix composites was conducted, revealing a decrease in flow stress with increasing deformation temperature and an increase with increasing strain rate. A hot processing map was established to determine optimal thermal deformation parameters and corresponding microstructural characteristics.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2021)
Article
Engineering, Manufacturing
Lingxiao Zeng, Wen Hao Kan, Kun Zhang, Chao Voon Samuel Lim, Louis Ngai Sum Chiu, Shaun David Gregory, Aijun Huang
Summary: Despite the slow production speed of LPBF, a hybrid approach combining LPBF and HIP can be used to accelerate the process. This study investigates the viability of using HIP to consolidate non-accessible powder-filled cavities in an LPBF Ti-6Al-4V part. Results show that HIP can achieve excellent bonding across the shell/cavity interface, although the elongation of the cavity region is poorer.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Mechanics
Yang Zhao, Qianqian Wu, Linzhi Wu
Summary: This study investigates the flexural mechanical properties of multilayer micro-lattice biomaterials using experimental, theoretical and finite element methods. The results show that the flexural property decreases with increasing bending span. Comparing with human skull specimens, the multilayer micro-lattice biomaterial shows good performance in flexural property.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
J. S. Jesus, L. P. Borrego, J. A. M. Ferreira, J. D. Costa, A. C. Batista, C. Capela
Summary: The fatigue crack growth behavior of titanium alloy Ti-6Al-4V after Hot Isostatic Pressing through Laser Powder Bed Fusion was analyzed. Crack growth under constant amplitude loading and the transient crack growth behavior after overloads or underloads were studied. The effect of mean stress and transient delay behavior were investigated.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
Ihsan Caha, Alexandra Alves, Caterina Chirico, Ana Pinto, Sophia Tsipas, Elena Gordo, Fatih Toptan
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Caterina Chirico, Sophia Alexandra Tsipas, Pablo Wilczynski, Elena Gordo
Article
Materials Science, Multidisciplinary
Cristina Arevalo, Enrique Ariza, Eva Maria Perez-Soriano, Michael Kitzmantel, Erich Neubauer, Isabel Montealegre-Melendez
Article
Chemistry, Physical
C. J. Boehlert, I Sabirov, B. Ruiz-Palenzuela, J. Cornide, E. M. Ruiz-Navas
Summary: Ti-22Al-26Nb and Ti-22Al-26Nb-5B compacts were processed using field assisted hot pressing (FAHP), with differences in processing temperatures and times resulting in varying microstructures. Higher processing temperatures led to fewer pores and three-phase microstructures, while longer processing times resulted in microstructural coarsening. Comparisons were made with compacts consolidated using hot isostatic pressing (HIP), showing finer grain sizes in the B-containing compacts. Compositional analysis suggested the presence of a B27 orthorhombic structure with B2TiNb stoichiometry in the Ti-22Al-26Nb HIP compact.Overall, FAHP was shown to be a viable powder metallurgy processing technique for Ti2AlNb-based intermetallic alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Metallurgy & Metallurgical Engineering
Eva Maria Perez-Soriano, Cristina Arevalo, Isabel Montealegre-Melendez, Erich Neubauer, Michael Kitzmantel
Summary: This study investigates the manufacturing of W-Cu alloys through advanced powder metallurgy, with Rapid Sinter Pressing chosen as the technique. By fixing processing parameters and using different particle sizes of starting powder materials, the study analyzes the impact on properties such as hardness, density, and thermal conductivity. Microstructural characterization reveals that the best distribution is achieved when using intermediate size W particles and fine Cu particles, with the composition of 80W-20Cu resulting in the best combination of properties.
Article
Materials Science, Multidisciplinary
C. J. Boehlert, D. Hernandez-Escobar, B. Ruiz-Palenzuela, I Sabirov, J. Cornide, E. M. Ruiz-Navas
Summary: The research investigated the compression deformation behavior of a powder metallurgy processed gamma-TiAl intermetallic alloy at room temperature and 700 degrees Celsius. The microstructure, strain rate sensitivity, and strength were found to be dependent on the microstructure of the alloy. Cracking was observed to occur within the gamma phase, increasing with temperature, strain, and strain rate. Overall, dislocation glide controlled the room temperature deformation, while thermally activated processes controlled dislocation glide at elevated temperatures.
MATERIALS CHARACTERIZATION
(2021)
Article
Physics, Multidisciplinary
Jose Luis Perez Diaz, Juan Sanchez Garcia-Casarrubios, Pablo Mendez-Vigo Carranza, Elisa Maria Ruiz Navas, Mihayl Iliev Petrov, Antonio Alcami Pertejo, Angela Vazquez, Alberto Rastrojo, Victor Archilla, Maria Sanchez Garcia, Gonzalo Fernandez Perea
Summary: Experimental tests were conducted to verify the decontamination and disinfection effectiveness of COUNTERFOG (R) technology, with operational recommendations provided to ensure disinfection reliability.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Chemistry, Physical
Eduardo Reverte, Monique Calvo-Dahlborg, Ulf Dahlborg, Monica Campos, Paula Alvaredo, Pablo Martin-Rodriguez, Elena Gordo, Juan Cornide
Summary: The structure and properties of FeCoNiCrAl1.8Cu0.5 high-entropy alloys obtained by two different methods were studied, showing that powder production techniques can affect the phase stability of the samples.
Article
Materials Science, Multidisciplinary
Paula Rodriguez-Gonzalez, Elisa Maria Ruiz-Navas, Elena Gordo
Summary: This study aims to develop high strength aluminium alloy wires for directed energy deposition techniques. Powder metallurgy methods are used to produce the wires, with two routes of blending the powders and heat treating the green compact. The study confirms that heat treatment homogenises the microstructure but requires higher pressure and time.
Article
Chemistry, Physical
Segundo Shagnay, Juan Cornide, Elisa Maria Ruiz-Navas
Summary: Intermetallic alloys such as titanium aluminides (TiAl) are potential materials for aerospace applications due to their low weight and improved efficiency under aggressive environments. However, limited information is available about the wear behavior and microstructure of these alloys. This study investigates the influence of microstructure on the tribological behavior of a TiAl intermetallic alloy and reveals that alloys manufactured by centrifugal casting exhibit lower volume wear loss compared to those manufactured by hot isostatic pressure, possibly due to differences in microstructure.
Review
Chemistry, Physical
Paula Rodriguez-Gonzalez, Elisa Maria Ruiz-Navas, Elena Gordo
Summary: Among metal additive manufacturing techniques, directed energy deposition (DED) technique, especially the wire-based one, is highly regarded for its rapid production of fully functional structural parts and near-net-shape products with complex geometries and unlimited sizes. However, the lack of commercially available high-strength aluminum alloy wires poses a major challenge. This review explores conventional and innovative wire production processes and summarizes the Al-Cu-Li alloys of industrial interest to facilitate the selection of suitable wire compositions. The role of each alloying element, particularly lithium, is discussed, as well as the defects related to the WAAM process and alloy chemical composition. Future developments, including pulse multicontrol (PMC) and cold metal transfer (CMT), for Al-Cu-Li alloys are also highlighted.
Article
Engineering, Manufacturing
Paula Rodriguez-Gonzalez, Erich Neubauer, Enrique Ariza, Leandro Bolzoni, Elena Gordo, Elisa Maria Ruiz-Navas
Summary: Arc-directed energy deposition using wire as feedstock is an effective 3D printing method for obtaining additively manufactured large structures. The study analyzed the effect of deposition parameters and clarified their interactions in plasma metal deposition of Al alloys. The input current, wire feed speed, and their interaction had the greatest effect on the quality of the deposited tracks. Changing the shielding gas atmosphere had the most significant impact on the penetration depth.
JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Enrique Ariza-Galvan, Isabel Montealegre-Melendez, Eva Maria Perez-Soriano, Erich Neubauer, Michael Kitzmantel, Cristina Arevalo
Summary: The purpose of this research is to study the influence of processing conditions and thermal treatments on the performance of specimens made from 17-4PH powder. It was found that an argon atmosphere and specific thermal treatments can improve the mechanical properties of the samples.
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)
