Article
Materials Science, Multidisciplinary
Beatriz Amaya Dolores, Andres Nunez Galindo, Jose Juan Calvino Gamez, Juan Francisco Almagro, Luc Lajaunie
Summary: The Gold Dust Defect on the surface of AISI 430 ferritic stainless steel is caused by improper recrystallization of the material, particularly during the hot-rolling step of the production process. The defect originates from the presence of martensite in the center of the material due to fast cooling during rolling, as well as the accumulation of chromium carbides separating unrecrystallized subgrains from the matrix. The defect becomes more pronounced after pickling, with the top-layer of subgrains semi-detaching from the surface and forming flakes that cannot recrystallize.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Milad Zohrevand, Mehrdad Aghaie-Khafri, Farnoosh Forouzan, Esa Vuorinen
Summary: The highpower ultrasonic treatment can effectively reduce the internal stress of stainless steel, leading to improvement in hardness and ductility. New microstructural mechanisms have been proposed to explain the observed acoustic stress relief.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Matruprasad Rout, Surjya K. Pal, Shiv Brat Singh
Summary: In this study, the microstructure evolution of austenitic stainless steel after deformation at elevated temperatures was investigated through thermo-mechanical processing. The results showed that at temperatures of 900 degrees C and 1000 degrees C, the microstructures of samples held for 2 seconds consisted of deformed grains, while the sample held at 1100 degrees C showed nearly complete recrystallization. The increase in holding time resulted in a decrease in low angle boundaries and an increase in high angle grain boundaries at all three temperatures.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Yuyang Hou, Guoguang Cheng, Kota Kadoi, Hiroshige Inoue
Summary: The formation of Ti2O3-TiN originates from the Ti-O-N particle, with Ti2O3 and TiN precipitating sequentially from it to constitute Ti2O3-TiN. Subsequently, the surface of the formed Ti2O3-TiN will promote delta-ferrite nucleation, contributing to suitable compositional design for equiaxed solidification.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Peter Birnbaum, Stefan Pilz, Kai Neufeld, Andreas Kunke
Summary: A constitutive model was developed to characterize the static recrystallization and grain size evolution of press-hardening steel 22MnB5. Isothermal stress relaxation tests were conducted to study the effects of temperature, prestrain, and strain rate on the kinetics of static recrystallization. The results showed that temperature and prestrain had significant influences on the recrystallization kinetics, while strain rate had a relatively small impact. Microstructural analysis and electron backscatter diffraction were also performed to examine the effects of forming parameters on grain size and martensite morphology.
Article
Chemistry, Physical
Hao Chen, Haifeng Xu, Tianpeng Zhou, Feng Yu, Wenquan Cao, Zejun Chen
Summary: The high temperature deformation behavior of a high-nitrogen stainless steel was investigated through uniaxial compression tests. The flow stress constitutive model was established using an Arrhenius-based hyperbolic sine equation, and processing maps were developed based on the dynamic material model. The microstructural evolution and dominant mechanism were characterized under different temperature and strain rate conditions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Lixi Tian, Cuiqi Yuan, Fang Wang, Chao Shi, Bangyan Zhang
Summary: Cold rolling and subsequent annealing can enhance the pitting resistance of 316LN austenitic stainless steel by forming ultra-fine grained structures. Partially recrystallized samples after short-time annealing show extraordinary corrosion resistance compared to cold rolled or fully recrystallized samples.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Z. Sangari Motlagh, B. Tolaminejad, A. Momeni
Summary: The study evaluated the capabilities of four constitutive equations and a newly developed phenomenological model in describing the hot flow behavior of 1.4542 stainless steel. The original ZA model was found to be effective for large strains, with subsequent modifications improving predictions for low strain levels. The Arrhenius-type constitutive equations showed good agreement with experimental results at low strain rates, but some deviations were observed at high strain rates.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
K. D. Koube, G. Kennedy, K. Bertsch, J. Kacher, D. J. Thoma, N. N. Thadhani
Summary: This paper investigates the spall damage mechanisms in LPBF-fabricated stainless steel SS316L under uniaxial strain plate-impact loading. The failure evolution with increasing impact velocity and peak pressure is explored, revealing a heterogeneous failure response and various failure mechanisms.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Kaiming Zhang, Kelu Wang, Shiqiang Lu, Mutong Liu, Ping Zhong, Ye Tian
Summary: The S280 ultra-high strength stainless steel was subjected to isothermal constant strain rate compression experiments to analyze its flow behavior and establish models for dynamic recrystallization. The results showed that the flow stress of the steel increased with increasing strain rate and decreasing deformation temperature. The distribution of dynamic recrystallization volume fraction and average grain size was non-uniform after thermal compression, and increased with increasing deformation temperature and decreasing strain rate. The numerical simulation results were in good agreement with the experimental results, providing a theoretical basis for microstructure control during thermal deformation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Xiaogang Li, Zhipeng Cai, Xin Chen, Shuqing Dong, Wenhe Cai, Xiaoming Shi, Chaoyu Han, Yu Zhang, Kejian Li, Jiluan Pan
Summary: The interfacial microstructures of ex-service dissimilar metal weld between austenitic stainless steel and low alloy ferritic steel were studied, revealing an ultra-fine grain band at the nickel-based weld metal/Low alloy steel interface. These ultra-fine grains were ferrite transformed from pre-existing martensite layer, triggering interfacial oxide notch and increasing the risk of interfacial cracking. This study provides new insights into the premature failure of such type of dissimilar metal welds.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Z. Sangarimotlagh, B. Tolaminejad, A. Momeni, I Fedorova, I. S. Zuiko, R. Kaibyshev
Summary: This study investigates the hot compression behavior of AISI 630 stainless steel and the effect of dynamic precipitation on its mechanical properties and microstructure.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Fei Gao, Zilong Gao, Qiyong Zhu, Fuxiao Yu, Zhenyu Liu
Summary: The deformation behavior of retained austenite in Q&P treated ferritic stainless steel plays a significant role in its performance. The characteristics of retained austenite, including grain size, location, morphology, and grain orientation, are crucial factors influencing its stability. Retained austenite with high stability contributes to prolonged uniform elongation during deformation. Additionally, both deformation rotation and martensitic transformation of retained austenite contribute to plastic deformation. During deformation, martensite and ferrite accommodate most of the plastic deformation, while the martensitic transformation of retained austenite becomes critical in the final stage of deformation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Yaohua Yang, Zizheng Jiang, Shengxuan Li, Xuefeng Liu, Jihong Sun, Wenjing Wang
Summary: Hot compression tests were performed on liquid-solid bonded 304 stainless steel/Q235 carbon steel laminated composites. Strain partitioning and microstructure evolution were analyzed. An Arrhenius constitutive model and artificial neural network (ANN) model were established to describe the flow behavior. The mechanical incompatibilities of the SS and CS led to strain partitioning and dynamic recrystallization (DRX) occurred during the hot compression process.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Crystallography
Meirong Shuai, Binbin Chang, Min Zhang, Zhibing Chu, Haibin Li, Liang Li, Lu Zhou
Summary: To ensure the long-lasting performance of concrete buildings in marine environments, it is crucial to develop building materials with excellent corrosion resistance and weatherability. Stainless steel cladding, with its corrosion resistance and cost advantages, is considered suitable for highly corrosive environments. This study investigates the deformation coordination and microstructure evolution near the interface of stainless steel/carbon steel cladding. Experimental analysis and modeling reveal that the coordination of deformation significantly increases near the interface, accompanied by a large number of recrystallized grains, contributing positively to the overall material performance.
Article
Engineering, Mechanical
Matthias Droste, Antti Jarvenpaa, Matias Jaskari, Mykhaylo Motylenko, Anja Weidner, Pentti Karjalainen, Horst Biermann
Summary: This study created different grain sizes in a metastable 17Cr-7Mn-7Ni steel by martensite-to-austenite reversion at different temperatures using a laser beam. It was found that refined grain sizes led to increased yield and tensile strengths, as well as a slightly improved fatigue life. Contrary, a heterogeneous microstructure exhibited inferior lifetime, especially at high strain amplitudes.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Pentti M. Kaikkonen, Mahesh C. Somani, Leo Pentti Karjalainen, Jukka I. Komi
Summary: Efforts to develop very fine, medium-carbon bainitic steels via the low-temperature ausforming process in the past decade have shown improved strength and shorter isothermal holding times for bainitic transformation. The study on static recrystallization characteristics using stress-relaxation method revealed the influence of microalloying and Mo addition on the process, with new regression equations established for estimating 50% SRX times.
Article
Materials Science, Multidisciplinary
S. Shyamal, S. R. Das, M. Jaskari, D. A. Porter, L. P. Karjalainen, P. Sahu
Summary: The cyclic behavior of a high-Mn austenitic steel was studied under high-cycle bending fatigue at room temperature, with microhardness increasing as a sign of cyclic hardening until 20,000 cycles and then saturating. Deformation mechanisms varied widely in grains depending on their sizes, with stacking faults predominant in fine grains and interconnected dislocation cells observed in larger grains. Dislocation densities estimated by X-ray diffraction were relatively low at 1014 m(-2).
Article
Metallurgy & Metallurgical Engineering
Suresh Kodukula, Pentti Karjalainen, David Porter
Summary: The study investigated the different ridging behavior of industrially produced stabilized ferritic stainless steel sheets after straining in different directions. It was found that straining along the rolling direction strengthened the alpha fiber, while straining along the transverse direction strengthened the gamma fiber, affecting the severity of ridging.
ISIJ INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
A. Babanejhad, M. Mosallaee, A. Kisko, M. Jaskari, P. Karjalainen
Summary: The pitting corrosion resistance of transient liquid phase bonded 2205 duplex stainless steel is significantly affected by the presence of specific bonding constituents, particularly the formation of (Fe,Ni,Cr,Mo)(3)P phosphide in the bonding zone (BZ) and P-rich sigma phase in the diffusion-affected zone (DAZ). Potentiodynamic polarization results confirm that the pitting potentials of TLP bonded specimens are closer to those of the BZ and DAZ areas, indicating these areas as preferential sites for pitting corrosion initiation.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
M. R. Kamali, A. R. Mashreghi, L. P. Karjalainen, S. Hasani, V Javaheri, M. Seiyedbeigi, J. Komi
Summary: Various contributors have been suggested to explain the variation of mechanical properties of Fe-Co-V magnetic alloys, but a comprehensive understanding is still lacking. The study found that annealing at temperatures between 450 and 550 degrees C led to an increase in hardness and yield strength, but a decrease in elongation. The results showed that the increase in hardness after annealing at these temperatures was likely due to the ordering transition in ferrite in Fe-Co and Fe-Co-2V alloys, while the decrease in yield strength was attributed to factors such as recovery and recrystallization of ferrite and decreasing number of (Co,Fe)(3)V precipitates.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
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
Chemistry, Physical
Matias Jaskari, Sumit Ghosh, Ilkka Miettunen, Pentti Karjalainen, Antti Jarvenpaa
Summary: Additive manufacturing is a new fabrication technology that has the potential to create complex customized products with high performance. However, challenges such as inadequate processing parameters and changes in powder properties can lead to defects in the final products. Studies on AISI 316L stainless steel pieces showed that while defects did not affect strength, they did impact post-uniform elongation. Twinning was found to be an active deformation mechanism in some specimens but was suppressed in others due to the presence of voids.
Article
Materials Science, Multidisciplinary
S. Yousefian, A. Zarei-Hanzaki, A. Barabi, H. R. Abedi, M. Moallemi, P. Karjalainen
Summary: The nickel-free high nitrogen duplex stainless steel undergoes friction stir spot welding, activating continuous dynamic recrystallization and dynamic phase transformation from ferrite to austenite for grain refinement. The formation of B-and A-fiber shear texture under various processing conditions significantly influences the mechanical properties of the joints.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
A. Moshiri, A. Zarei-Hanzaki, A. S. Anousheh, H. R. Abedi, Seok Su Sohn, Junha Yang, M. Jaskari, L. P. Karjalainen, F. Berto
Summary: This study investigates the fatigue and dwell-fatigue behaviors of Fe-Mn-Al-C lightweight steel, revealing reversible dislocation movement and dynamic strain aging induced by a shift in loading mode. Furthermore, applying dwell time accelerates strain aging and intensifies stress asymmetry during dwell fatigue, affecting crack initiation and growth in a bilateral manner.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Atef Hamada, Ali Khosravifard, Sumit Ghosh, Matias Jaskari, Antti Jarvenpaa, Pentti Karjalainen
Summary: In this study, the austenitic Cr-Ni stainless steel was treated with double-reversion annealing (DRA) to develop refined grain microstructures. The DRA structures exhibited superior mechanical properties, formability, and austenite stability under high-speed deformation.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Z. Aalipour, A. Zarei-Hanzaki, A. Moshiri, H. R. Abedi, Daudi Waryoba, A. Kisko, L. P. Karjalainen
Summary: The microstructure and microtexture changes of an extruded and annealed magnesium alloy were investigated under different strain and processing conditions. The results showed that the material underwent noticeable refinement even at low applied compressive strain. Recrystallization process was completed at a true strain of 0.3, and grain refinement was attributed to the LSN and CDRX mechanisms. At higher strain levels, most grains were found in deformed states and the microtexture only changed in terms of intensity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Mehrdad Ghiasabadi Farahani, Jeoung Han Kim, Matias Jaskari, Leo Pentti Karjalainen, Puspendu Sahu
Summary: The mechanism of deformation twinning during tensile straining in an Fe-0.013C-29Mn-2.4Al steel is reported. Transmission electron microscopy examinations revealed that twinning occurred through a modified pole mechanism proposed by Niewczas and Saada. Twinning Shockley partial dislocations and their stacking faults are formed through interaction among the prismatic dislocations and Frank partials of the Frank dipoles.
Article
Materials Science, Multidisciplinary
Mohammad Hossein Barati Rizi, Mehrdad Ghiasabadi Farahani, Mahdi Aghaahmadi, Jeoung Han Kim, Leo Pentti Karjalainen, Puspendu Sahu
Summary: In this study, electron microscopy and cyclic stress relaxation experiments were used to investigate the dislocation-obstacle interactions and activated hardening mechanisms in a high-Mn TWIP steel specimen. The results showed that the dislocation evolution through the composite effect was the dominant rate-controlling mechanism, contributing to the strain hardening behavior.
Article
Materials Science, Multidisciplinary
S. R. Das, S. Shyamal, T. Sahu, J. Komi, P. C. Chakraborti, D. A. Porter, L. P. Karjalainen, P. Sahu
Summary: Transmission electron microscopy was used to investigate the formation of dislocation substructure in a tensile deformed fine-grained high-Mn steel. A cross-slip assisted dislocation truncation mechanism was identified, along with planar glide producing a Taylor lattice. This mechanism delayed dynamic recovery and led to uniform strain hardening, resulting in a good combination of high strength and ductility observed for the first time in high-Mn steel.
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)
