Article
Materials Science, Multidisciplinary
Min Qi, Yingjie Ma, Jie Yang, Yandi Jia, Hanbo Weng, Sensen Huang, Ruixue Zhang, Jianke Qiu, Jiafeng Lei, Rui Yang
Summary: This study investigated the microtexture evolution of alpha in alpha + beta titanium alloys with different Mo content during thermomechanical processing. The results show that the addition of Mo element significantly weakens the microtexture of the prior alpha colony in Ti-6Al-2Sn-4Zr-6Mo (Ti6246) alloy. The study demonstrates the effect of Mo content on the microtexture evolution during thermo-mechanical processing.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Inna A. Naschetnikova, Stepan I. Stepanov, Andrey A. Redikultsev, Valentin Yu. Yarkov, Maria A. Zorina, Mikhail L. Lobanov
Summary: The crystallographic relationship between alpha- and beta-phases resulting from phase transformations during different cooling methods of Ti6Al4V plates were investigated through experimental data and theoretical calculations. It was found that the secondary beta(II)-phase occurred in a specific sequence during continuous cooling, and the orientations differences between alpha- and beta-phases showed a certain distribution pattern at discrete angles.
Article
Materials Science, Multidisciplinary
Liangwen Xie, Xianyong Zhu, Yuexiang Fan, Song Yang, Cheng Jiang, Yulai Song
Summary: The B-fiber texture in friction-stir welding of Mg-4.6Al-1.2Sn-0.7Zn magnesium alloy was investigated using electron-backscatter diffraction technique. The {0001} base plane of texture tended to align with the effective geometric shear plane induced by the tool shoulder and the pin. The texture intensity showed a symmetric distribution in the shoulder-affected zone and gradually increased from the retreating side to the advancing side in the pin-affected zone. The non-uniform distribution of texture on the welded joint was attributed to inhomogeneous shear plastic strain and material transfer.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Chunfei Li, Josiah Dubovi, Clay Klein
Summary: This article presents a method to determine facet orientation using SEM and EBSD, which is validated with facets on spherical particles of 20 μm in an Al60Cu25Fe15 alloy. The experimental results show that the surface of the facet is parallel to the {100} lattice plane of a cubic phase.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Genki Tsukamoto, Tomonori Kunieda, Shigeto Yamasaki, Masatoshi Mitsuhara, Hideharu Nakashima
Summary: The study investigated the effects of grain boundary, grain size, and deformation temperature on twinning deformation in polycrystalline commercially pure titanium. Different twinning systems were observed at different deformation temperatures and grain sizes, indicating the complex interplay between these factors in twinning deformation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Geochemistry & Geophysics
Sheng Fan, David J. Prior, Travis F. Hager, Andrew J. Cross, David L. Goldsby, Marianne Negrini
Summary: Kinking is an important process during crystal plastic deformation and may influence the mechanical properties of the Earth's lithosphere and planetary cryosphere. Microstructural analyses of deformed ice samples show that kinking and dynamic recrystallization both play a role in grain nucleation, depending on the crystallographic orientations of individual grains.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Yongtao Liu, Patrick Trimby, Liam Collins, Mahshid Ahmadi, Aimo Winkelmann, Roger Proksch, Olga S. Ovchinnikova
Summary: Metal halide perovskite (MHP) solar cells have gained global attention in research. Understanding the crystal orientation and ferroic properties of MHP twin stripes is essential to comprehend the impact of ferroic behavior on the optoelectronic properties. Investigating these aspects provides insight into the influence of subgrain structures in MHPs.
Article
Geochemistry & Geophysics
Sheng Fan, Andrew J. Cross, David J. Prior, David L. Goldsby, Travis F. Hager, Marianne Negrini, Chao Qi
Summary: The study found that under high temperature and stress conditions, strain weakening in ice is mainly influenced by the development of crystallographic preferred orientation (CPO) rather than grain size reduction. This may also apply to other viscously anisotropic minerals under similar conditions.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Engineering, Mechanical
Rodrigo de Carvalho Paes Loureiro, Miloslav Beres, Mohammad Masoumi, Hamilton Ferreira Gomes de Abreu
Summary: The investigation into the environmental assisted cracking failure mechanism revealed the significant impact of pearlite morphology and crystallographic texture on crack nucleation and propagation. The presence of high angle grain boundaries was found to suppress crack propagation, while refined microstructure was effective in preventing crack growth. Control of crystallographic orientation was identified as a key factor in improving resistance to environmentally assisted cracking.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Metallurgy & Metallurgical Engineering
Osamu Umezawa, Weibo Li
Summary: The generation of subsurface fatigue cracks in a groove-rolled and cold-swaged Ti-Fe-O alloy was studied, and the effects of crystallographic texture on crack initiation and growth were discussed. Microcracks were found in beta grains, alpha grains, and at the alpha-beta interface. The presence of {10 (1) over bar0}(alpha) fiber texture hindered the growth of microcracks along the basal plane, but assisted their growth along the prismatic plane or at a {10 (1) over bar0}(alpha) twist boundary. The combination of shear stress and opening stress on {10 (1) over bar0}(alpha) resulted in Mode II or III microcracks and caused crack growth on the prismatic plane in neighboring grains.
ISIJ INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Jongun Moon, Olivier Bouaziz, Hyoung Seop Kim, Yuri Estrin
Summary: Deformation-induced twinning was used as a strengthening mechanism in a thermomechanical treatment for a high-entropy alloy, resulting in improved mechanical properties, especially in strain hardening ability, at room temperature.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Zhichun Zhou, Binbin Jiang, Jianke Qiu, Linglei Zhang, Jiafeng Lei, Rui Yang, Kui Du
Summary: This study investigates the mechanism of crack formation in titanium alloys with lamellar microstructure under low-cycle dwell fatigue. The accumulation of residual dislocations and local tensile stress at the α/β interfaces are found to be the key factors leading to the formation of dwell fatigue cracks.
SCIENCE CHINA-MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Mario F. G. Ramirez, Jose W. C. Hernandez, Duberney H. Ladino, Mohammad Masoumi, Helio Goldenstein
Summary: The study simulated different regions of the heat-affected zone formed during welding of API X80 pipeline steel using different cooling rates, and found that samples with specific microstructures exhibited better HIC resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
Luiz Carneiro, Duke Culbertson, Qin Yu, Yanyao Jiang
Summary: The study experimentally characterized the mechanical response and microstructure evolution of a rolled AZ31B magnesium alloy using companion thin-walled tubular specimens under free-end monotonic torsion. It was found that the shear stress-shear strain response exhibits a sigmodal shape with four distinctive stages of strain hardening, involving basal slips, tension twinning, and compressing twinning. The formation of twin-twin boundaries (TTBs) and the collective hardening effects by twin boundary (TB) and TTB contribute to a unique rise in strain hardening rate in certain stages. Further observations of different types of twins and their interactions provide insights into the deformation mechanisms during different stages of the process.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Kai Yao, Shewei Xin, Yi Yang, Yu Du, Jincai Dai, Ting Li, Xiaohua Min
Summary: The tensile behavior of metastable beta-type Ti-15Mo alloy with {332}<113> twinning-induced plasticity (TWIP) effect was investigated at 20K. It was found that the alloy exhibited ultrahigh strength and excellent elongation, making it a major advancement for cryogenic applications. The serrated tensile curve and multiple necking observed were attributed to the formation of twins. The presence of abundant {332}<113> twins and piled-up dislocations at twin boundaries hindered local plastic deformation and necking, resulting in simultaneous enhancement of strength and ductility. Exploiting the {332}<113> TWIP effect in body-centered cubic (BCC) structured titanium alloys is a novel strategy for cryogenic alloy development.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Kishan Habib, Hideaki Nishikawa, Yoshiyuki Furuya, Satoshi Emura
Summary: The tension-compression fatigue tests on forged and rolled Ti-6Al-4V alloys showed that the fatigue life of the rolled R-950 alloy was higher than that of the forged F-950 alloy. There were major differences in fatigue crack growth rate at crack lengths below 100 μm, with the F-950 alloy showing lower resistance. The analysis of crack opening stress indicated that the effect of texture alone nullified the crack closure, with the F-950 alloy showing basal planes with similarly-oriented grains while the R-950 alloy showed variation in orientation during short fatigue crack growth.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Fabien Briffod, Liu Hanqing, Takayuki Shiraiwa, Manabu Enoki, Satoshi Emura
Summary: A layered alpha/beta Ti alloy was developed by cold rolling and aging of a metastable beta Ti-12Mo alloy, where alpha phase selectively precipitated at twin boundaries following a fixed crystallographic orientation relationship. The presence of α martensite inside thick twins and omega phase formed during cold rolling led to the dispersed alpha precipitate in the matrix. The deformation behavior of aged sample showed an increase in yield strength, with plastic deformation mainly occurring in the alpha layer at the interface between the matrix and thick twins.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Fumiyoshi Yoshinaka, Takahiro Sawaguchi, Susumu Takamori, Satoshi Emura
Summary: This study investigates the mechanisms of TRIP-enhanced ductility by analyzing the tensile deformation microstructure of Fe-15Mn-10Cr-8Ni-4Si alloy. The study found that there are three different TRIP mechanisms, including γ->ε, ε->α', and reverse ε->γ transformations, which play important roles in the excellent ductility of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Hanqing Liu, Fabien Briffod, Takayuki Shiraiwa, Manabu Enoki, Satoshi Emura
Summary: This study investigates the deformation behaviors of Mg-Y-Zn alloys and Ti-12Mo alloy with mille-feuille-like structure using acoustic emission (AE) methods combined with supervised and unsupervised machine learning. In the supervised learning process, AE signals from compression tests were used to build a classification model. In the unsupervised learning process, AE signals were divided into two clusters based on frequency spectrum features for further analysis.
MATERIALS TRANSACTIONS
(2022)
Article
Nanoscience & Nanotechnology
Dong-Hyun Lee, Zhe Gao, Jeong-Min Park, Yakai Zhao, Jin-Yoo Suh, Eric A. Jagle, Koichi Tsuchiya, Upadrasta Ramamurty, Jae-il Jang
Summary: The significant strengthening of SLM 304L stainless steel after high-pressure torsion treatment is mainly attributed to the synergistic combination of grain refinement and martensitic transformation. In the nanocrystalline regime, the dominance of grain boundary-mediated plasticity retards martensite-induced hardening.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Fabien Briffod, Takayuki Shiraiwa, Manabu Enoki, Satoshi Emura
Summary: The mechanisms of fatigue crack initiation and propagation were investigated in a forged Ti-6Al-4V alloy with a bimodal microstructure. The study found that transgranular crack initiations occurred on both basal and prismatic planes in grains with high plastic activity. Intergranular crack initiations were found in pairs of grains sharing the same basal plane. Short crack propagation was transgranular and crystallographic on either basal or prismatic plane depending on the microtextured regions they belong. The presence of a macrozone was not necessary for crack initiation but appeared necessary for its propagation.
Article
Nanoscience & Nanotechnology
Junyu Zhu, Fabien Briffod, Takayuki Shiraiwa, Manabu Enoki, Satoshi Emura
Summary: The plastic deformation behavior of an alpha/beta two-phase Ti-10Cr alloy with fine lamella microstructure was investigated. The crystallographic and kinematical relationships among the formed deformation bands were clarified through the analysis of the crystallographic relationship between the matrix, the twin, and the precipitates.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Hidetoshi Somekawa, Jangho Yi, Hiromi Takahashi, Takanobu Hiroto, Koichi Tsuchiya
Summary: Experimental studies have revealed that many cavities are formed at grain boundaries and grain boundary triple junctions of fine-grained magnesium specimens during plastic deformation at room temperature, and the size and density of these cavities increase with the progression of deformation. The majority of cavities are controlled by plasticity, and their growth rate is similar to those observed in superplastic magnesium alloys tested at elevated temperatures.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Fumiyoshi Yoshinaka, Takahiro Sawaguchi, Susumu Takamori, Satoshi Emura, Yasuhiko Inoue
Summary: A bidirectional transformation mechanism (B-TRIP) between gamma-austenite and epsilon-martensite has been utilized to develop fatigue-resistant steel with high reversibility in dislocation motion. By modifying the Fe-15Mn-11Cr-7.5Ni-4Si steel, the Fe-18Mn-11Cr-7.5Ni-4Si B-TRIP steel was designed and showed a two-fold improvement in fatigue life compared to the previous steel. Microstructural analysis revealed that the enhanced irreversible alpha'-martensitic transformation in the previous steel negatively affected the durability of B-TRIP.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Chemistry, Physical
Junyu Zhu, Fabien Briffod, Takayuki Shiraiwa, Manabu Enoki, Satoshi Emura
Summary: A combination of experimental and numerical studies was conducted to understand the microstructure and formation mechanism of kink bands in alpha/beta two-phase titanium alloys. Deformation kink bands were introduced in a Ti-9Cr alloy, and the strength changes of the alpha and beta phases inside and outside the kink band were evaluated. Microstructural examination and crystallographic analysis revealed the presence of prismatic slip during compression, and a crystal plasticity finite element model was developed to reproduce the {110}beta-rotation-type kink bands.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Baozhen Jiang, Doudou Men, Satoshi Emura, Koichi Tsuchiya
Summary: The aged Ti-5Al-5Mo-5V-3Cr alloy processed by high-pressure torsion (HPT) exhibits different flow behaviors for the acicular precipitates and matrix, which greatly affect the grain refinement process. After 100 revolutions of HPT processing, the microstructure and microhardness homogenization is achieved slowly, and the refinement may be enhanced by the acicular precipitates. The HPT processing produces an ultrafine microstructure with a grain size below 50 nm and a high dislocation density, resulting in a bell-shaped curve of microhardness evolution.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Digvijay Singh, Wataru Tasaki, Fumiyoshi Yoshinaka, Susumu Takamori, Satoshi Emura, Koichi Tsuchiya, Takahiro Sawaguchi
Summary: Researchers investigated the complex phase structures at the ε-ε intersection induced by deformation-induced martensitic transformation in austenitic steels. By compressing a single crystal of 316 austenitic stainless steel at a cryogenic temperature, they revealed the orientation relationships between the γ/ε/α' phases using electron backscattered diffraction analysis. The findings provide important insights for understanding this phase transformation process.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Xin Ji, Yan Chong, Satoshi Emura, Koichi Tsuchiya
Summary: A heterogeneous microstructure in Ti-15Mo-3Al alloy with heterogeneous distributions of Mo element and omega(iso) precipitates has achieved a four-fold increase in tensile ductility without a loss of tensile strength, by blocking the propagation of dislocation channels and preventing the formation of micro-cracks.
SCRIPTA MATERIALIA
(2024)
Article
Chemistry, Physical
Motoharu Imai, Kwangsik Han, Mitsuaki Nishio, Takeshi Kato, Satoshi Kawada, Satoshi Emura, Taichi Abe, Hiroshi Fujihisa
Summary: Cubic SrSi2 is a potentially significant material in thermoelectricity and material science. However, its physical properties have not been thoroughly examined. This study investigates the Sr-Si phase diagram at different silicon content and identifies two intermetallic compounds and two eutectic reactions within the Si content range of 55-100 at%. Additionally, the study presents the crystal structure of the newly discovered SrSi2-X compound.
JOURNAL OF ALLOYS AND COMPOUNDS
(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)