Article
Chemistry, Physical
Ichwan Fatmahardi, Mazli Mustapha, Azlan Ahmad, Mohd Nazree Derman, Turnad Lenggo Ginta, Iqbal Taufiqurrahman
Summary: Resistance spot welding is an effective method for welding titanium alloys, particularly Ti-6Al-4V. By analyzing the physical and mechanical properties, the optimal weld joint strength level can be determined to achieve desired results.
Article
Chemistry, Physical
Jiming Lv, Kaiyu Luo, Haifei Lu, Zhao Wang, Jiajun Liu, Jinzhong Lu
Summary: This research investigated the influences of laser shock peening (LSP) on the residual stress state, microstructures, and mechanical properties of Ti-6Al-4V alloy fabricated by selective laser melting (SLM). The results showed that LSP treatment adjusted the residual stress from tensile to compressive state and promoted the formation of high-density dislocations and parallel nano mechanical twins (nano-MTs) in the coarse lamellar alpha' structures, resulting in grain refinement. The ultimate tensile strength and elongation of the SLMed Ti-6Al-4V alloy increased by approximately 14.3% and 18.3% after LSP treatment, respectively. The study revealed that the combination of high levels of compressive residual stress and grain refinement achieved by LSP contributed to the enhancement of both strength and ductility in the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
Sergey Prikhodko, Dmytro G. Savvakin, Pavlo E. Markovsky, Olexander O. Stasuk, James Penney, Norbert Enzinger, Michael Gaskill, Frank Deley
Summary: Titanium alloys are considered supreme structural materials due to their high specific strength, but their wide use is limited by high cost. Layered structures and friction welding are effective ways to improve material utilization and achieve desirable results in complex structures.
WELDING IN THE WORLD
(2021)
Article
Nanoscience & Nanotechnology
Jeong-Won Choi, Yasuhiro Aoki, Kohsaku Ushioda, Hidetoshi Fujii
Summary: The interfacial temperature, microstructure, and hardness distribution of linear friction welded Ti-6Al-4V joints at different applied pressures were studied. Increasing pressure considerably decreased welding temperature and formed dynamically recrystallized ultra-fined alpha equiaxed grains in the weld center, leading to higher hardness and improved mechanical properties of the joints.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
X. P. Ren, H. Q. Li, H. Guo, F. L. Shen, C. X. Qin, E. T. Zhao, X. Y. Fang
Summary: The study provides a comprehensive benchmark comparison on the microstructure, mechanical properties, and underlying mechanisms of Ti-6Al-4V alloys processed through selective laser melting (SLM), electron beam melting (EBM), and millannealing. Different processing methods result in distinct microstructures and material properties, with potential for improving ductility in SLMed samples and enhancing strength in EBMed samples through post-annealing and process optimization.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Jungsub Lee, Hyunjong Ha, Jae Bok Seol, Jung Gi Kim, Eun Hyeok Seo, Seung Ki Moon, Im Doo Jung, Hyokyung Sung
Summary: In order to compensate for the porosity of high-speed printed Ti-6Al-4V specimens, a hot isostatic pressing (HIP) process was applied, which led to a deterioration phenomenon critically affected by the surface roughness of the as-built state. Efficient control can be achieved through setting the build angle.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Electrical & Electronic
Chen Zhang, Dongsheng Li, Xiaoqiang Li, Yong Li, Qin Xia
Summary: This paper investigates the high-temperature flow behavior and microstructure evolution of Ti-6Al-4V alloy with linear friction welded (LFW) joints. A high-temperature uniaxial tensile test platform is built, and various tests are performed at different temperatures and strain rates. The results show a clear correlation between temperature and strain rate in the flow behavior of LFW joints, and the microstructure analysis reveals the change in deformation mechanism and the increase in high angle boundaries fraction with increasing temperature. Discontinuous dynamic recrystallization is identified as the primary mechanism of nucleation during high-temperature deformation.
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
Materials Science, Multidisciplinary
Minhan Fang, Ying Li, Yuanfei Han, Jianwen Le, Guangfa Huang, Xianghai Chai, Liming Lei, Weijie Lu
Summary: In this study, in-situ SEM tensile investigations were conducted to study the fracture mechanism and anisotropic behavior of selective laser melted and then heat-treated Ti6Al4V. The results showed that surface steps were formed during the plastic stage, and microcracks were mainly initiated by the separation or fracture of adjacent lamellae. Surface defects induced strain concentration and premature failure, while defects inside the specimens had little effect on ductility.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
C. Mukundhan, P. Sivaraj, Vijay Petlay, Shweta Verma, V Balasubramanian
Summary: Linear Friction Welding is a suitable method for manufacturing aero-engine components, and the joint quality can be improved by adjusting process parameters. This study found that friction time has an impact on joint characteristics and weld integrity, and the appropriate friction time can enhance microhardness and tensile strength of the weld.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Multidisciplinary
Ateekh Ur Rehman, Nagumothu Kishore Babu, Mahesh Kumar Talari, Yusuf Siraj Usmani, Hisham Al-Khalefah
Summary: The present study utilized friction welding to join dissimilar alloys of Ti-Al-4V to Nitinol, investigating the effect on welded macro and microstructures, hardness, and tensile properties. The formation of an intermetallic compound at the weld interface resulted in poor ultimate tensile strength and elongation values, causing all tensile specimens to fail at the weld interface.
Article
Materials Science, Multidisciplinary
Francisco Dias, Goncalo Cipriano, Armenio N. Correia, Daniel F. O. Braga, Pedro Moreira, Virginia Infante
Summary: Combining dissimilar materials is important in developing lightweight structures and reducing CO2 emissions in the transport sector. The use of advanced joining processes, like friction stir welding, can overcome the challenges of joining different materials in multi-purpose structures. This study investigates the mechanical performance and process parameters of dissimilar joints produced using a different approach to friction stir welding.
Article
Optics
Leilei Wang, Bowen Shi, Xukang Cai, Conghao Wu, Yanxiao Zhang, Xiaohong Zhan
Summary: LMD-WAAM hybrid process was used to fabricate Ti6Al4V and the effect of laser power on the grain evolution and mechanical properties was studied. Results showed that different thermal histories formed a graded microstructure and the interface zone had higher microhardness.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Huihong Liu, Hidetoshi Fujii
Summary: Friction welding of Ti-6Al-4V alloy and SUS316L stainless steel was conducted with ultralow rotation speed and high friction pressure, resulting in the successful fabrication of a high-quality joint.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Multidisciplinary
Cheng Kui, Zhang MingBo, Song Hao, Liu XinWang, Fan ZiTian, Wang GuiLan, Zhang HaiOu
Summary: This study explores the use of synchronous microrolling (HDMR) to address the problems of coarse columnar grains, inhomogeneous microstructure, and anisotropic mechanical properties in Ti-6Al-4V manufactured by wire and arc additive manufacturing (WAAM) and hybrid additive manufacturing with plasma-arc deposition. HDMR significantly refines the grains and improves isotropy, leading to better tensile properties in titanium alloys.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Deepak Kumar, Suyog Jhavar, Abhinav Arya, K. G. Prashanth, Satyam Suwas
Summary: This study compared the fracture toughness of two different additive manufacturing processes, selective laser melting (SLM) and wire arc additive manufacturing (WAAM), for stainless steel 316L. It found that the SLM manufactured samples exhibited higher fracture toughness, likely due to their higher twin density and propensity for dislocation slip.
INTERNATIONAL JOURNAL OF FRACTURE
(2022)
Article
Materials Science, Multidisciplinary
Raghunandan Ummethala, J. Jayaraj, Phani S. Karamched, Sokkalingam Rathinavelu, Neera Singh, Kumar Babu Surreddi, K. G. Prashanth
Summary: The Ti-35Nb-7Zr-5Ta (TNZT) alloy fabricated by selective laser melting (SLM) shows varying corrosion behaviors based on different build orientations, with specimens built at 45 degrees orientation exhibiting the highest polarization resistance and lowest corrosion rate. The passive film formed on samples at 45 degrees orientation is more stable and protective compared to other orientations, involving active participation of both Ti and Nb in the film formation process.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Nanoscience & Nanotechnology
Deepak Kumar, Gyan Shankar, K. G. Prashanth, Satyam Suwas
Summary: Selective laser melting is widely used for manufacturing austenitic stainless steel (316L) due to its inherent advantages. Studies have shown that mechanical properties can be adjusted by controlling scanning strategies, and the evolution of microstructure and crystallographic texture is influenced by hatch style variations.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Pei Wang, Sijie Yu, Jaskarn Shergill, Anil Chaubey, Jurgen Eckert, Konda Gokuldoss Prashanth, Sergio Scudino
Summary: The alloy samples show different microstructural evolution and mechanical properties after solution treatment and quenching, with the presence of coarse Si particles resulting in lower strength and higher wear rate in SQ samples. Meanwhile, the formation of nanosized Cu-rich precipitates in SQA samples leads to the highest compressive yield strength and good wear resistance.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
T. Chen, J. A. Lin, W. S. Cai, H. W. Ma, L. H. Liu, Z. Wang, C. Yang
Summary: A novel yielding anisotropy in commercially pure titanium (CP-Ti) was achieved through alpha <->beta cyclic phase transformation (CPT) treatment using pulsed electric current (PEC). The CP-Ti exhibited significant yielding anisotropy after the three-cycle CPT treatment, with a much higher yield strength than other treated specimens. The lattice evolution mechanism and orientation relationship responsible for this yielding anisotropy were proposed, highlighting the preferential activation of basal <a> slip in the three-cycle-treated CP-Ti.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
R. Sokkalingam, B. Pravallika, K. Sivaprasad, V Muthupandi, K. G. Prashanth
Summary: The study involves the fabrication of a dissimilar joint between Al0.1CoCrFeNi-HEA and Inconel 718 using gas tungsten arc welding. Columnar dendritic grains grew epitaxially at the HEA/weld metal interface while non-epitaxial solidification occurred at the weld metal/Inconel 718 interface. The joint showed a joint efficiency of around 88% with a strength of 644 MPa and 21% ductility, demonstrating the feasibility of GTAW in fabricating dissimilar weld joints between HEA and Inconel 718 for structural applications.
JOURNAL OF MATERIALS RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
H. Z. Lu, L. H. Liu, C. Yang, X. Luo, C. H. Song, Z. Wang, J. Wang, Y. D. Su, Y. F. Ding, L. C. Zhang, Y. Y. Li
Summary: This study investigates the simultaneous enhancement of mechanical and shape memory properties of TiNi shape memory alloys fabricated using selective laser melting. Heat-treatment homogenization of Ti2Ni precipitates is found to significantly improve the alloy's tensile strength, elongation, and shape memory effect. The enhanced properties are attributed to precipitation strengthening, work hardening, and the presence of homogeneous nanoscale globular Ti2Ni precipitates, which inhibit the propagation of microcracks and suppress dislocation movement.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Chemical
C. Yang, J. C. Wang, L. M. Kang, T. Chen, W. W. Zhang, L. H. Liu, Y. Y. Li
Summary: A novel powder metallurgy strategy has been developed to overcome the room-temperature brittleness of pressureless sintered titanium matrix composites by evading Kirkendall's pores. By coating nanosized TiB2 powder with stearic acid and reactive sintering with micron-sized TiH2 powder, TiBw/Ti composites with nearly full density and low porosity have been prepared, exhibiting large tensile plasticity and high strength comparable to or even superior to some ceramic phase-reinforced pure Ti matrix composites.
Article
Materials Science, Multidisciplinary
Nidhi Khobragade, Tapabrata Maity, Anna Swiderska-Sroda, Gierlotka Stanislaw, Witold Lojkowski, Pokula Narendra Babu, Snehanshu Pal, Debdas Roy
Summary: Graphene reinforced Cu-based nanocomposite (Cu-Gr) synthesized under high-pressure forming (-8 GPa) at 300 degrees C exhibited 96% relative density and an 84% improvement in electrical conductivity (IACS), as well as increased hardness and Young's modulus up to -94 GPa. The structure and defects evolution were investigated using nanoindentation and verified computationally. Molecular dynamics simulations showed consistent results with experiments, revealing that grain growth and grain boundary sliding (GBS) played a dominant role in deformation mechanisms involving dislocation motion, stacking faults (SFs), and twin boundary (TBs) formation, as well as matrix failure through grain growth and GBS with increased load, leading to subsequent bending processes.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Chenyang Jiang, Xiaoqiang Li, Hao Luo, Jingmao Li, Shengguan Qu, Chao Yang
Summary: Selective laser melting was used for the first time to fabricate DT300 ultra-high strength steel, resulting in fully dense parts with greater than 99% relative density. The study also explored the types and formation mechanism of defects under different conditions. The specimens fabricated with optimized parameters exhibited outstanding mechanical properties and surface quality.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Editorial Material
Materials Science, Multidisciplinary
Chao Yang, Lai-Chang Zhang, Suryanarayana Challapalli
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
W. S. Cai, H. Z. Lu, H. Z. Li, Z. Liu, H. B. Ke, W. H. Wang, C. Yang
Summary: An ultrafine-grained NiTi-based shape memory alloy with excellent superelasticity was successfully prepared through spark plasma sintering, and its microstructural evolution and superelastic properties were investigated. The results showed that residual nano-scale amorphous phase and coherent or semi-coherent fcc (Ti,Zr)2Ni precipitate played important roles in achieving perfect superelasticity.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
W. S. Cai, T. Chen, H. Z. Lu, H. W. Ma, Z. Liu, A. Yan, C. H. Song, H. Hosoda, C. Yang
Summary: In this study, a dual-SMA composite with a biospired honeycomb structure was designed and fabricated using a combination of 3D printing and hot extrusion. The composite exhibited superior superelasticity, with a remarkable recoverable strain and good recovery rate. The honeycomb structure facilitated the occurrence of progressive phase transformation, enabling the composite to sustainably bear loads.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Jiayin Li, Xiaotao Liu, Xuan Luo, Fei Gao, Chao Zhao, Bowen Ma, Dongdong Li, Chao Yang
Summary: Introducing Cu (3.5 wt%) into Ti6Al4V through EB-PBF enables the fabrication of Ti6Al4V-3.5Cu alloy with improved ductility and mechanical property isotropy, surpassing the performance of the solely PBF-EB/Ti6Al4V alloy. The addition of Cu leads to the formation of micro/nanosized Ti2Cu phases, contributing to a significant strengthening effect and preventing plastic deterioration caused by brittle lamellar structures. Microstructural evolution involving the generation of twin structures and spheroidization of α-Ti, coupled with the intrinsic heat treatment during the EB-PBF process, enhances the ductility of the TVAC alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
C. Yang, Y. X. Liao, W. S. Cai, H. Z. Lu, Y. G. Yao, T. Chen, S. Yin
Summary: A semi-solid sintering method was developed to construct a core-shell architecture in Ti68.8Nb13.6Co6.8Cr5.1Al6.5 alloy, and the underlying mechanism of microstructure evolution and deformation behavior was revealed. The resulting core-shell structure exhibited high strength and plasticity, making it suitable for structural materials applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(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)
