Article
Metallurgy & Metallurgical Engineering
Jia Liu, Haojie Wang, Long Huang, Xing Ma, Rong Zhang, Xiangtao Deng, Zhaodong Wang
Summary: In this study, a stainless steel was subjected to cold rolling and annealing to obtain nano/ultrafine-grained steel with a good combination of strength and ductility. Low-temperature rolling reduced the stacking fault energy and promoted the formation of various martensite phases. Different experimental methods resulted in structures with different grain sizes.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
E. I. Hernandez-Duran, L. Corallo, T. Ros-Yanez, F. M. Castro-Cerda, R. H. Petrov
Summary: The study investigates the influence of heating rates and annealing temperatures on the microstructure and mechanical properties of cold-rolled steels with and without carbide-forming elements. Results show that high heating rates refine the parent austenitic grains and promote the formation of fine-grained constituents. Samples treated at high heating rates display higher tensile strength and elongation, indicating the significance of microstructure heterogeneity on the mechanical behavior of the steels.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Miaomiao Zhao, Yang Liu, Hongyan Wu, Linxiu Du
Summary: The effect of Cr and Ni element segregation on the stability and deformation mechanisms of nano/ultrafine-grained 304 stainless steel obtained by cryogenic rolling plus annealing treatment was systematically studied. The study found that the nano/ultrafine-grained steel exhibited a good balance between strength and ductility, with high yield strength, tensile strength, and elongation. The segregation of Cr at the intersection of austenite grain boundaries and low Ni content austenite grains reduced the stability of the steel and promoted the formation of strain-induced martensite, resulting in a deformation mechanism dominated by transformation-induced plasticity.
MATERIALS SCIENCE AND TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Antti Jarvenpaa, Sumit Ghosh, Ali Khosravifard, Matias Jaskari, Atef Hamada
Summary: The novel processing route of double reversion annealing (DRA) in austenitic stainless steel showed significant improvement in mechanical properties compared to traditional processes. Superior combination of strength and formability were achieved in the DRA structures, surpassing other steel types like TWIP steels, TRIP steels, and 304 stainless steel.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
V Sheremetyev, S. Dubinskiy, A. Kudryashova, S. Prokoshkin, V Brailovski
Summary: In this study, a superelastic Ti-18Zr-14Nb shape memory alloy was subjected to thermomechanical treatment to investigate its nanocrystalline structure formation, stress- and cooling-induced martensitic transformations, and determine critical grain sizes. The results show that specific cold rolling and annealing conditions can produce nanocrystalline and submicrocrystalline structures with excellent elastic properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Wenwei Gao, Hai Wang, Konrad Koenigsmann, Shuyuan Zhang, Ling Ren, Ke Yang
Summary: In this study, a series of Ti-15Zr-xCu alloys were designed and fabricated to refine the grain size and suppress grain growth. Experimental results showed that Cu alloying significantly improved the mechanical properties of the alloys, resulting in better comprehensive mechanical performance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Duanjun Sun, Zheng Zhou, Kun Zhang, Xingyun Yang, Xiaohui Liu, Zhenghong Guo, Jianfeng Gu
Summary: Gaining access to the parent microstructural information is crucial for understanding transformation mechanism and mechanical properties. This paper proposes two novel approaches to reconstruct accurate twin boundaries in prior austenite and ultrafine grained prior austenite.
MATERIALS & DESIGN
(2023)
Article
Nanoscience & Nanotechnology
Gong Na, Nasrin Farzana, Wang Yong, Wu Huibin, Keffer David, Maroulas Vasileios, Rios Orlando
Summary: The study utilized electron backscatter diffraction analysis to investigate the effect of annealing temperature on the fraction of high-angle grain boundaries and Schmid factor in nano/ultrafine-grained 18Cr-8Ni stainless steel. By employing persistent homology, the study reduced the dimensionality of information describing the complex processing-structure-property relationship. Results showed that different annealing temperatures lead to different crystal structures, resulting in varying mechanical properties of the steel.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Mohammad Saleh Geshani, Hamed Mirzadeh, Mohammad Javad Sohrabi
Summary: The grain size of duplex 2205 stainless steel is controlled through cold rolling and annealing, achieving grain refinement and grain coarsening via primary recrystallization and grain growth. The study proposes simple equations relating yield stress and ultimate tensile strength to grain size and relative volume fractions of ferrite and austenite. The research outcomes contribute to controlling the microstructure and mechanical properties of duplex stainless steels.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
I. V. Ratochka, I. P. Mishin, O. N. Lykova, E. V. Naydenkin
Summary: The study explores the superplastic behavior of ultrafine-grained Ti-5Al-5V-5Mo-1Cr-1Fe alloy in the temperature range 773-1023 K. It is found that the formation of a more equilibrium structural-phase state after annealing significantly reduces elongation to failure and shifts the superplasticity temperature to higher deformation temperatures. The high elongation to failure during superplastic deformation is thought to be due to the formation of a deformation-induced grain structure with small grains forming interlayers between large grains.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Renata Mangini Santos, Daniella Gomes Rodrigues, Maria Luiza Dias Santos, Dagoberto Brandao Santos
Summary: Lean duplex stainless steels exhibit good mechanical and corrosion resistances due to their microstructure of ferrite and austenite phases. The cold rolling and subsequent annealing treatments of LDSS 2304 have shown different stages of strain hardening and microstructural evolution. The coexistence of slipping and transformation-induced plasticity (TRIP) mechanisms leads to multiple stages of strain hardening, with distinct characteristics observed at different annealing temperatures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Guosheng Sun, Jizi Liu, Yuntian Zhu
Summary: By introducing a bi-modal heterostructure, Luders deformation in UFG 304 stainless steel can be effectively suppressed, leading to improved ductility and toughness without sacrificing strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Review
Materials Science, Multidisciplinary
Pavel Dolzhenko, Marina Tikhonova, Marina Odnobokova, Rustam Kaibyshev, Andrey Belyakov
Summary: The aim of this review is to summarize recent achievements in the development of ultrafine-grained austenitic/ferritic stainless steels through large strain deformation. The paper discusses various methods of large strain deformation for producing ultrafine-grained metallic materials. It also explores the structural mechanisms responsible for grain refinement during plastic deformation and examines the physical and mechanical properties of ultrafine-grained stainless steels. The review concludes that the development of ultrafine-grained microstructures during severe plastic deformation is a result of continuous dynamic recrystallization, with the misorientations among strain-induced cells/subgrains progressively increasing.
Article
Metallurgy & Metallurgical Engineering
David Martin, Lena Ryde, Johan Eliasson, Johannes Brask, Bevis Hutchinson
Summary: Study focused on alloy chemistry and process conditions to achieve a steel with a tempered martensite matrix, providing a tensile strength >900 MPa and containing >20% austenite for improved ductility and formability. Laboratory tests simulated industrial annealing conditions. The increase in austenite content during isothermal reversion annealing primarily occurs by growth of pre-existing fragments of retained austenite in the initial martensitic microstructure.
STEEL RESEARCH INTERNATIONAL
(2021)
Review
Materials Science, Multidisciplinary
Deliang Zhang
Summary: Ultrafine grained metals and metal matrix nanocomposites with enhanced strength and good tensile ductility can be successfully fabricated through processing and consolidation techniques. The synergistic effects of grain boundary strengthening and intragranular nanoparticles play a crucial role in improving the material's performance, while heterogeneous microstructures introduce additional boundaries between hard and soft regions to enhance strength without sacrificing ductility.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Rana Bagheri, Fathallah Karimzadeh, Ahmad Kermanpur, Mahshid Kharaziha
Summary: A simple and novel method for immobilization of AS1411 aptamer on Cu nanoparticles electrode was presented and validated by experiments. The study found that choosing 0.03 M Cu concentration, 10 μM aptamer concentration, and 20 minutes incubation time achieved the optimized performance, which was confirmed by quartz crystal microbalance.
Article
Engineering, Mechanical
Vahid Javaheri, Oskari Haiko, Saeed Sadeghpour, Kati Valtonen, Jukka Komi, David Porter
Summary: Grain refinement is widely used to improve the hardness and toughness properties of metallic materials. However, the impact of prior austenite grain refinement on the final martensitic microstructure and wear performance of steels is not fully understood. The study found that within a certain range of achieved prior austenite grain size, the final martensitic microstructures showed only slight differences in block size and hardness levels, which affected work hardening behavior and wear mechanisms during testing.
Article
Chemistry, Physical
Abbas Ahmadi Siahboumi, Ahmad Kermanpur, Fazlollah Sadeghi, Hamid Reza Ghorbani
Summary: This study investigated the microstructural evolutions during solidification and hot isostatic pressing (HIP) of Ti-48Al-2Cr-2Nb-xHf (4822-xHf, x = 0, 2, 4, 6 at%) intermetallic alloys, revealing finer dendritic microstructure in high-Hf alloys and discussing the precipitation mechanism of Al3Hf2 particles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Nahid Torabi, Xinkai Qiu, Manuel Lopez-Ortiz, Mark Loznik, Andreas Herrmann, Ahmad Kermanpur, Ali Ashrafi, Ryan C. Chiechi
Summary: This study compares the orientation of photosystem I complexes on different electrode surface chemistries and finds that devices fabricated with C-61 fulleroids exhibit significantly improved performance and reproducibility, with a 1.6-fold increase in efficiency. C-61-based devices also show greater stability under continuous illumination.
Article
Engineering, Mechanical
V. Javaheri, S. Sadeghpour, P. Karjalainen, M. Lindroos, O. Haiko, N. Sarmadi, S. Pallaspuro, K. Valtonen, F. Pahlevani, A. Laukkanen, J. Komi
Summary: This study comprehensively investigates the extremely altered white layer formed on a medium-carbon low-alloy steel during the slurry erosion process. The white layer exhibits a nanocrystalline structure with ultra-high hardness. It is found that the solid particle impacts during the high-speed slurry erosion process result in high strain conditions, leading to the formation of a unique microstructure and property changes.
Article
Materials Science, Multidisciplinary
Saeed Sadeghpour, Mahesh C. Somani, Jukka Komi, L. Pentti Karjalainen
Summary: A new combination of factors is employed to enhance the stabilization of austenite in a medium Mn steel, resulting in a refined multi-component microstructure. The microstructure evolution and phase fraction during processing are systematically investigated, revealing a combination of phases including martensite, pearlite, retained austenite, and carbide precipitates. By optimizing annealing parameters, an ultrafine-grained microstructure is achieved with equiaxed ferrite, retained austenite, and some fresh martensite.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
Jalal Kangazian, Morteza Shamanian, Ahmad Kermanpur, Fazlollah Sadeghi, Ehsan Foroozmehr
Summary: One advantage of emerging additive manufacturing is the ability to build parts with complex geometries. This study evaluates the microstructure and compressive response of Hastelloy X Ni-based superalloy honeycomb lattices fabricated by laser powder-bed fusion additive manufacturing. The results show that heat treatment improves the microstructure and slightly enhances the compressive performance of the samples.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Saeed Sadeghpour, Vahid Javaheri, Mahesh Somani, Jukka Komi, Pentti Karjalainen
Summary: A novel processing route is proposed to create a heterogeneous, multiphase structure in a medium Mn steel through partial quenching, warm deformation, and partial recrystallization. The study indicates that desired novel microstructures can be imparted in these steels through suitable process design, which can result in enhanced mechanical properties.
Article
Engineering, Mechanical
Mohammad Javad Sohrabi, Hamed Mirzadeh, Saeed Sadeghpour, Reza Mahmudi
Summary: The mechanical behavior and martensite formation of austenitic steels have been studied in relation to grain size. It was found that there is a significant change in mechanical properties and transformation-induced plasticity (TRIP) effect in the transition grain size range of 34 to 90 μm. Increasing grain size promotes the formation of deformation-induced martensite, but suppresses it at coarser grain sizes.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Nanoscience & Nanotechnology
Jalal Kangazian, Ahmad Kermanpur, Morteza Shamanian, Fazlollah Sadeghi, Mohsen Badrossamay, Ehsan Foroozmehr
Summary: Tailoring the microstructure of additively manufactured metal parts by adjusting process parameters reduces the need for post-treatments and leads to cost and production steps reduction. This study investigates the effects of scanning patterns on microstructures and hot tensile behavior of a laser powder-bed-processed Hastelloy X Ni-based superalloy. The results show that the island scanning pattern produces superior tensile properties at high temperatures due to its larger grain and cell sizes compared to the meander pattern.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Yasamin Hosseini, Ahmad Kermanpur, Fakhreddin Ashrafizadeh, Ahmad Keyvani
Summary: This study investigates the effect of alumina (Al2O3) nanoparticles on the hot oxidation behavior of NiCoCrAlTaY coating. High velocity oxygen fuel (HVOF) technique was used to deposit coatings on a single crystal CMSX-4 Ni-based superalloy. Different amounts of a-Al2O3 nanoparticles (3, 6 and 9 wt%) were added to NiCoCrAlTaY powder and sprayed on the superalloy substrate. Results showed that the coating with 6 wt% nano-Al2O3 exhibited significantly better oxidation performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Mohammad Javad Sohrabi, Hamed Mirzadeh, Saeed Sadeghpour, Reza Mahmudi
Summary: The study examined the effects of nucleation site and morphology of deformation-induced martensite on the work-hardening behavior of TRIP-assisted austenitic stainless steel with different austenite grain sizes. It was found that the nucleation site of a'-martensite changed from grain boundaries to interior regions of deformed grains, and the morphology changed from blocky to film-like with increasing grain size. The formation of film-like a'-martensite on shear bands and their intersections resulted in higher work-hardening rate compared to blocky a'-martensite formed on grain boundaries.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Vahid Javaheri, Sakari Pallaspuro, Saeed Sadeghpour, Sumit Ghosh, Johannes Sainio, Renata Latypova, Jukka Komi
Summary: This study discusses the tensile and fracture toughness properties, as well as the microstructural evolution, of a medium-carbon, low-alloy steel under different rapid tempering conditions. The results indicate that tempering temperature has a significant influence on the mechanical properties and microstructural features, regardless of the holding time. By properly designing the rapid tempering process, a combination of high tensile properties and fracture toughness can be achieved compared to conventional tempering.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Marzieh Ebrahimi, Ahmad Kermanpur, Mahshid Kharaziha
Summary: This study investigated the effects of geometric parameters and heat treatment on the mechanical performance and corrosion behavior of Ti-6Al-4V sheet-based gyroid implants fabricated by laser powder-bed fusion. The results showed that an increase in pore size decreased the Young's modulus and strength of the implants, while heat treatment improved their corrosion resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Hamid Reza Ghorbani, Ahmad Kermanpur, Ahmad Rezaeian, Fazlollah Sadeghi, Abbas Ahmadi Siahboumi
Summary: The effect of N addition on solidification behavior and microstructural features of the cast and HIPed Ti-48Al-2Cr-2Nb alloy was studied. The results showed that N addition changed the morphology of the primary phase dendrites and improved the uniformity of the microstructures. Furthermore, N addition led to the formation of primary Ti2AlN precipitates within lamellar colonies and increased microstructure stability during HIPing. N addition also decreased the formation of a duplex structure and promoted the formation of secondary Ti2AlN precipitates at lamella interfaces.
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)
