Article
Materials Science, Multidisciplinary
Syed Mustafa Kazim, Kartik Prasad, Pritam Chakraborty
Summary: This paper develops a crystal plasticity model to capture the dynamic strain aging (DSA) behavior of Timetal-834 alloy at high temperatures. The model successfully predicts the flow stress and DSA behavior, showing good agreement with experimental data. The model incorporates nested models and microstructural analysis to capture the microstructure-dependent DSA.
MECHANICS OF MATERIALS
(2023)
Article
Chemistry, Physical
Jie Zhao, Kehuan Wang, Liangxing Lv, Liliang Wang, Denis J. Politis, Gang Liu
Summary: This paper presents an integrated crystal plasticity finite element model of near-alpha titanium alloys during non-superplastic hot deformation conditions. The model considers grain boundary sliding, dynamic recrystallisation, and void evolution. The simulation shows the existence of two high microscopic strain regions in the alpha phase, which promote continuous and discontinuous dynamic recrystallisation. Methods to improve the macroscopic plastic formability are also proposed.
Article
Nanoscience & Nanotechnology
Yang Liu, Weifeng Wan, Fionn P. E. Dunne
Summary: This study investigates the intrinsic crystal slip system properties and their influence on stress, stress relaxation, and strain rate sensitivity (SRS) using experimental testing, digital image correlation strain measurement, electron backscatter detection, and crystal plasticity modelling. The findings show that Zircaloy-4 exhibits significant SRS behavior, which is accurately captured by the polycrystal plasticity model. The model also predicts the effects of texture and slip system activation on lattice strain rate sensitivities.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Jie Zhao, Kehuan Wang, Liangxing Lv, Gang Liu
Summary: In this study, the effect of grain size on the yield stress of a near-alpha TA15 titanium alloy was modeled and analyzed through crystal plastic finite element simulation. The results show that the grain size transitions from refinement strengthening to refinement softening as the temperature increases. The distribution of microscopic strain is determined by the critical grain size, and different deformation mechanisms occur when the grain size is above or below the critical size. Continuous and discontinuous dynamic recrystallization occur simultaneously when the grain size is above the critical size, while stimulant grain boundary sliding promotes discontinuous dynamic recrystallization when the grain size is below the critical size.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Mechanics
Hyuk Jong Bong, Daeyong Kim, Yong-Nam Kwon, Jinwoo Lee
Summary: This study investigated the hot deformation behavior of Ti-6Al-4V alloy sheets at a temperature of 650℃ after various forming histories, including empirical testing of different deformation modes and quantifying results through damage modeling. Constitutive modeling, including flow softening and strain rate sensitivity, was conducted and material constants were calibrated using hot uniaxial tension tests at various strain rates. Thermomechanical finite element simulations were used to predict the plastic deformation and failure behaviors of the alloy sheets under hot forming conditions. The research results provide a basis for optimal hot forming processes for titanium alloys.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Nanoscience & Nanotechnology
Ronglei Fan, Yong Wu, Minghe Chen, Jie Zhao
Summary: The established model accurately predicted the anisotropic deformation behavior and the effect of dynamic recrystallization on the material properties during hot tension of TA32 titanium alloy. The transverse texture led to a higher r-value for TD tension than for RD tension, mainly due to the higher dislocation density caused by more inhomogeneous plastic deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Syed Mustafa Kazim, Kartik Prasad, Pritam Chakraborty
Summary: The microstructure of near a and alpha + beta Ti-alloys, consisting of globular a grains and transformed beta colonies, is analyzed. Equivalent models of the lath microstructure based on iso-strain and virtual crystal assumptions have been developed, but they fail to accurately capture the response of the lath aggregate, individual phases, and slip systems. This work presents an improved model with independent iso-stress and iso-strain conditions for individual laths, ensuring strain compatibility and stress equilibrium through periodic motion and traction balance. The developed model shows significantly better accuracy in predicting stress-strain response and slip activities compared to existing models.
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Minh Tien Tran, Sun-Kwang Hwang, A. Ra Jo, Ho Won Lee, Dong-Kyu Kim
Summary: This study investigates the influence of surface roughening on the micromechanical failure of ultra-thin ferritic stainless steel (FSS) sheet. The results show that an increase in surface roughness accelerates strain localization and leads to premature failure of the material due to the increased inhomogeneity of thickness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Jinwoo Lee, Hyuk Jong Bong, Daeyong Kim, Jinjin Ha
Summary: In this study, the mechanical responses and ductile damage behavior of Ti-6Al-4V alloy sheets at high temperature were investigated through experiments and numerical simulations. The improvement in formability at high temperature was also evaluated.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Mengqi Zhang, Bin Tang, Lumeng Wang, Kaidi Li, Bangqi Yin, Zhenshun Zhang, Jinshan Li
Summary: A well-designed microstructure is essential for achieving desirable properties and optimizing service performance of titanium alloys. The influence of microstructure on heterogeneous deformation and strain partition behavior needs to be thoroughly investigated. Crystal plasticity simulations reveal that coarser β and finer α lamellae show improved strain accommodation capacity due to the plastic slip occurring in the coarse β lamellae. The interlamellar strain partition coefficient stabilizes after 5% deformation. The angles 71 and 72 are used to evaluate the strengthening effects of α lamellae precipitating from 6 types of β variants.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
H. B. Boubaker, C. Mareau, Y. Ayed, G. Germain, A. Tidu
Summary: This study proposes a crystal plasticity-based constitutive model to characterize the thermo-mechanical behavior of the Ti17 titanium alloy under extreme loading conditions. The model incorporates the effect of crystallographic orientation, ductile damage, and temperature on mechanical behavior, and is implemented in a finite element method solver. Material parameters are determined using an inverse method, and the model successfully captures the influence of temperature and strain rate on mechanical behavior, as well as the role of local texture on ductile damage development.
MECHANICS OF MATERIALS
(2022)
Article
Engineering, Mechanical
Tsuyoshi Mayama, Sean R. Agnew, Koji Hagihara, Kentaro Kamura, Kazuma Shiraishi, Michiaki Yamasaki, Yoshihito Kawamura
Summary: The influence of alpha-Mg/LPSO phase interfaces on the flow stress of as-cast Mg-Zn-Y alloys was experimentally and numerically evaluated. The results showed that the flow stresses of Mg-Zn-Y alloys with LPSO phase fractions ranging from 40 to 85% were higher than those of single phase alpha-Mg or LPSO alloys. Comparison between Mg-Zn-Y alloys and Mg-Zn-Y-Zr alloys revealed that the flow stresses of Mg-Zn-Y alloys with LPSO phase fractions of 25 and 40% were insensitive to grain size, while the flow stress of alpha-Mg single-phase alloy showed clear grain size dependence. Crystal plasticity analysis successfully reproduced the observed stress-strain behavior, indicating that alpha-Mg/LPSO phase interfaces are effective obstacles against dislocation slip in two-phase Mg alloys containing LPSO phase.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Mathematics, Interdisciplinary Applications
William G. Feather, Hojun Lim, Marko Knezevic
Summary: Numerous CPFE simulations were conducted to investigate the effects of element type and mesh resolution on the accuracy of predicted mechanical fields over grain structures, showing that quadratic tetrahedral and linear hexahedral elements are more accurate for CPFE modeling compared to linear tetrahedral and quadratic hexahedral elements. Tetrahedral elements are preferred due to their speed in mesh generation and flexibility in describing complex grain geometries.
COMPUTATIONAL MECHANICS
(2021)
Article
Chemistry, Multidisciplinary
Hanjiang Wu, Tao Huang, Kexing Song, Yanmin Zhang, Yanjun Zhou, Shaolin Li, Xin Li
Summary: In this study, a crystal plasticity finite element model of multi-pass continuous drawing deformation of pure copper micro wires was established, and the effects of high-speed deformation and micro wire diameter scale on the continuous drawing deformation behavior of micro wires were studied.
NANOTECHNOLOGY REVIEWS
(2023)
Article
Engineering, Mechanical
Kyle Starkey, Anter El-Azab
Summary: We propose a computational algorithm for solving the finite-deformation continuum dislocation dynamics theory and demonstrate its effectiveness through various test problems.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Aleksandr Zinoviev, Ruslan Balokhonov, Olga Zinovieva, Varvara Romanova
Summary: This paper analyzes the plastic strain localization and fracture of porous ceramic coating-polycrystalline substrate structures under compressive loading. The results show that the crack-initiation strain depends exponentially on the substrate grain size. A comparison between different coating-substrate interface models suggests that using a serrated interface is preferable.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Mechanics
R. Balokhonov, V Romanova, O. Zinovieva, A. Zemlianov
Summary: A numerical study was conducted to investigate the deformation and fracture behavior in metal matrix - ceramic particle composites, using Al6061T6 and ZrC as examples. The study utilized a step-by-step packing method to generate three-dimensional model microstructures and solved dynamic boundary-value problems using the finite-element method. By developing a user-defined subroutine, the study combined the anisotropic matrix and isotropic particle responses to analyze the composite thermomechanical behavior.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Polymer Science
Apollinariya A. Volokhova, Dmitry A. Fedorishin, Arina O. Khvastunova, Tatiana I. Spiridonova, Anna I. Kozelskaya, Julia Kzhyshkowska, Sergei I. Tverdokhlebov, Irina Kurzina
Summary: Surface modification with plasma can enhance biocompatibility and improve surface wettability and chemical bonding in polymeric electrospun scaffolds. It also increases drug release rates without compromising surface morphology and mechanical properties of the scaffolds. This technique can be useful for obtaining drug delivery systems with controlled release.
Article
Materials Science, Multidisciplinary
Alexey Panin, Andrey Dmitriev, Anton Nikonov, Olga Perevalova, Lyudmila Kazantseva, Alexander Bakulin, Svetlana Kulkova
Summary: Experimental and theoretical studies have revealed the microstructure formation patterns in the surface layer of Ti-6Al-4V titanium alloy, including the mixed amorphous and nanocrystalline structures. Molecular dynamics simulations and ab initio calculations have provided insights into the phase transformations during ultrasonic impact treatment, with a proposed mechanism associating the development of strain-induced transformations with the presence of oxygen.
Article
Materials Science, Multidisciplinary
Varvara Romanova, Ruslan Balokhonov, Olga Zinovieva, Dmitry Lychagin, Evgeniya Emelianova, Ekaterina Dymnich
Summary: The deformation behavior of aluminum single crystals under compression along [100] and [110] directions is investigated using crystal plasticity. The study reveals the formation and propagation of plastic deformation fronts in order to maintain crystal symmetry. Additionally, multiple deformation stages, including slip and crystal fragmentation, are observed.
Article
Chemistry, Physical
Lin Wang, Sven Rutkowski, Tieyan Si, Tawheed Hashem, Bin Guo, Jie Xu, Anna Kozelskaya, Sergei Tverdokhlebov, Johannes Frueh
Summary: This study presents a method for creating liquid metal motors using biologically benign gallium. By laminating the motors with a biodegradable macromolecular thin film, the motors can retain their initial shape and be remotely guided using magnetic fields. The research demonstrates the technical realization and properties of this novel system, opening up new paths and potential applications.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2022)
Article
Biophysics
Zewei Zhao, Tieyan Si, Anna I. Kozelskaya, Igor O. Akimchenko, Sergei I. Tverdokhlebov, Sven Rutkowski, Johannes Frueh
Summary: The speed and motion directionality of bubble-propelled micromotors depend on bubble lifetime, bubble formation frequency, and bubble stabilization. This study presents a fully biodegradable Janus structured micromotor driven by hydrogen bubbles. The presence and concentration of a surfactant reversibly change the micromotor's propulsion direction. Without a surfactant, the micromotor is pulled backward by bubble cavitation, while with a surfactant above the critical micelle concentration, it is pushed forward by the generated bubbles.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Engineering, Mechanical
V. Romanova, R. Balokhonov, O. Zinovieva, V. Shakhidzhanov, E. Dymnich, O. Nekhorosheva
Summary: An interrelation between mesoscale deformation-induced surface roughening and in-plane plastic strain in an aluminum alloy is revealed through experimental and numerical studies. The estimation of mesoscale surface roughness proves to be capable of evaluating the accumulated in-plane plastic strains in a loaded material.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Mechanical
R. Balokhonov, V. Romanova, O. Zinovieva, E. Dymnich
Summary: This study numerically investigates the deformation and fracture of metal-matrix composites. Composite microstructures with a single ceramic particle in a homogeneous or polycrystalline matrix are generated using a step-by-step packing method. The thermoelastic-plastic reaction of the matrices is described using isotropic and anisotropic relations, and fracture criteria are developed to describe crack initiation and propagation.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Polymer Science
Arsalan D. Badaraev, Dmitrii Sidelev, Anna Kozelskaya, Evgeny N. Bolbasov, Tuan-Hoang Tran, Alexey Nashchekin, Anna B. Malashicheva, Sven Rutkowski, Sergei Tverdokhlebov
Summary: In this study, polymer scaffolds were fabricated and surface-modified by sputtering titanium targets, resulting in increased hydrophilicity and cell adhesion.
Article
Chemistry, Physical
Alexander Y. Fedotkin, Igor O. Akimchenko, Tuan-Hoang Tran, Artur R. Shugurov, Evgeniy V. Shesterikov, Anna I. Kozelskaya, Sven Rutkowski, Sergei I. Tverdokhlebov
Summary: Polyether ether ketone is a bioinert polymer with a hydrophobic surface that hinders cell adhesion and osseointegration. This study investigates the surface modification of polyether ether ketone disc samples with titanium thin films of varying thicknesses and reveals that the coatings have a consistent chemical composition and amorphous structure. The modified samples show improved surface properties and decreased water contact angles, making them suitable for biomedical applications.
Article
Pharmacology & Pharmacy
Arsalan D. Badaraev, Marat I. Lerner, Olga V. Bakina, Dmitrii V. Sidelev, Tuan-Hoang Tran, Maksim G. Krinitcyn, Anna B. Malashicheva, Elena G. Cherempey, Galina B. Slepchenko, Anna I. Kozelskaya, Sven Rutkowski, Sergei I. Tverdokhlebov
Summary: Biocompatible poly(lactide-co-glycolide) scaffolds fabricated via electrospinning are modified on the surface with copper and titanium to improve antibacterial properties without toxicity to mouse fibroblasts. Different amounts of copper and titanium are achieved by changing the magnetron sputtering process parameters. The scaffold sample with the highest copper to titanium ratio exhibits the best antibacterial properties and no toxicity to mouse fibroblasts, although it has a toxic effect on human gingival fibroblasts. The optimal scaffold sample is surface-modified with a medium ratio of copper and titanium.
Review
Chemistry, Physical
Olga Zinovieva, Varvara Romanova, Ekaterina Dymnich, Aleksandr Zinoviev, Ruslan Balokhonov, Xiaohui Zhao, Chao Chen
Summary: In the field of additive manufacturing, the predictability of part properties is challenging due to the multiphysics complexity. This review argues that numerical modelling, along with experimental studies, can help mitigate these challenges. The development of microstructure-informed mechanical models is crucial in capturing the complexity of AM-produced materials.
Article
Polymer Science
Pavel V. V. Maryin, Tuan-Hoang Tran, Anastasia A. A. Frolova, Mikhail A. A. Buldakov, Evgeny L. L. Choinzonov, Anna I. I. Kozelskaya, Sven Rutkowski, Sergei I. I. Tverdokhlebov
Summary: Controlled regeneration processes involving tissue growth using surface modification of scaffolds are important in tissue engineering. This study demonstrates the use of nitrogen/xenon gas mixtures in direct current magnetron sputtering to modify the surface of non-woven poly-L-lactic acid scaffolds, resulting in increased hydrophilicity and no cytotoxic effect on human osteosarcoma cells. The formed coatings are primarily composed of titanium oxide and titanium oxynitride compounds, influenced to a certain extent by the gas mixture ratio.
Article
Engineering, Multidisciplinary
Anna I. Kozelskaya, Ksenia N. Verzunova, Igor O. Akimchenko, Johannes Frueh, Vsevolod I. Petrov, Galina B. Slepchenko, Olga V. Bakina, Marat I. Lerner, Leonid K. Brizhan, Denis V. Davydov, Artur A. Kerimov, Elena G. Cherempey, Sergey E. Krylov, Sven Rutkowski, Sergei I. Tverdokhlebov
Summary: A promising method for improving the functional properties of calcium-phosphate coatings is the incorporation of various antibacterial additives into their structure. This study investigated the fabrication and properties of zinc-containing calcium-phosphate coatings formed from three different electrolyte solutions. The results showed that coatings containing calcium acetate and zinc oxide had the highest zinc concentration and release, and exhibited the highest antibacterial activity against Staphylococcus aureus and methicillin-resistant Staphylococcus aureus.
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)