Article
Chemistry, Multidisciplinary
Abinash Kumar, Konstantin Klyukin, Shuai Ning, Cigdem Ozsoy-Keskinbora, Mikhail Ovsyanko, Felix van Uden, Ruud Krijnen, Bilge Yildiz, Caroline A. Ross, James M. LeBeau
Summary: YFeO3 thin films exhibit changes in antiphase boundaries under the influence of Y-Fe antisite defects and strain, displaying polar and bistable characteristics. Density functional theory demonstrates that the presence of Fe-Y antisites significantly decreases the switching barrier.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Chaoqiang Liu, Zongyu Xie, Lin Qi, Houwen Chen, Min Song
Summary: In this study, aberration-corrected scanning transmission electron microscope was used to characterize alpha-alpha precipitates boundaries. The formation mechanism of (10 (1) over bar1)(α) and (10 (1) over bar3)(α) coherent twin boundaries (CTBs) was reported, along with the resulting lattice distortion and introduced dislocations.
Article
Nanoscience & Nanotechnology
Lipeng Ding, Thaneshan Sapanathan, Dominique Schryvers, Aude Simar, Hosni Idrissi
Summary: This paper reports on the atomic scale observations and formation mechanisms of a high density of antiphase boundaries (APBs) within an ultra-fine-grained Fe4Al13 intermetallic layer at an Al/steel interface. The study reveals that the APBs are formed by nucleation and the glide of partial dislocations. This new understanding could potentially improve the toughness of this intermetallic by increasing the strength/ductility balance.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Xu Liu, Lin Song, Andreas Stark, Daria Lazurenko, Florian Pyczak, Tiebang Zhang
Summary: The study investigates the precipitation behavior of the omega(o) phase and creep properties of a Ti-45Al-9Nb-0.5B alloy at intermediate temperatures. It shows that the imposed stress contributes to the nucleation and growth of the omega(o) phase, which can reduce the creep resistance of the material. Additionally, dynamic recrystallization is identified as a primary cause of microstructural degradation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Chunyang Gao, Yixiao Jiang, Tingting Yao, Ang Tao, Xuexi Yan, Xiang Li, Chunlin Chen, Xiu-Liang Ma, Hengqiang Ye
Summary: The study reveals the formation and magnetic coupling properties of three types of antiphase boundaries in magnetite thin films.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Takehiro Tamaoka, Ryotaro Aso, Yasukazu Murakami
Summary: This paper investigates magnetic anomalies in antiphase boundaries (APBs) using electron holography, revealing the diverse effects of APBs in different ordered crystals on magnetic properties, and the potential for inducing different magnetic characteristics through APBs.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
C. H. Ng, M. J. Bermingham, D. Kent, M. S. Dargusch
Summary: This study investigates the stability of beta-phase in high heat input Wire Arc Additive Manufacturing of a titanium alloy, finding that the alloy retains its bcc beta-phase during the process due to fast cooling rates and short thermal exposures, resulting in moderate strength and good ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
H. Zhang, X. Y. Xue, M. J. Xue, J. S. Li, M. J. Lai
Summary: We have demonstrated the potential to enhance the strength and strain hardenability of high-entropy alloys by substituting transition metal elements with silicon. The resulting high-entropy alloy exhibits excellent strength-ductility synergy, low density, and low alloying costs. The addition of silicon imparts a low stacking fault energy, leading to the progressive formation of martensite plates during plastic deformation. Furthermore, silicon-alloying increases the volume fraction of deformation-induced martensite plates and renders their thickness ultra-thin, resulting in remarkable strain hardenability.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
M. R. Gazizov, A. N. Belyakov, R. Holmestad, M. Yu. Gazizova, V. S. Krasnikov, P. A. Bezborodova, R. O. Kaibyshev
Summary: The coarsening behavior of strengthening particles in peak-aged Al-Cu-Mg-Ag alloy during creep at 150 degrees C and 165 degrees C has been studied. It was found that the average thickness and diameter of {111}Al omega plates strongly depend on creep time and less on applied stress levels and plastic strain during creep. The volume fraction of omega particles increased during long-term creep and exceeded the value after peak aging. S-phase and theta'-phase independently nucleate and intergrow to form precipitate complexes. The size of the complex particles is sensitive to the plastic strain level achieved at different applied stresses during creep.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Yuri Ustinovshikov
Summary: This article presents the results of an electron microscopic study on the Ni68Mo20Al12 alloy, which reveals the formation of diffusion micro-pairs in the liquid state and the phase separation transition at 1200℃. The study suggests that the starting point for the microstructure formation of alloys is their liquid state. Moreover, it highlights the limited prospects for high-entropy alloys due to hindered diffusion of atoms.
Article
Chemistry, Multidisciplinary
Zhuo Li, Jinlian Lu, Lei Jin, Jan Rusz, Vancho Kocevski, Hideto Yanagihara, Eiji Kita, Joachim Mayer, Rafal E. Dunin-Borkowski, Hongjun Xiang, Xiaoyan Zhong
Summary: Spinel ferrites are important materials with magnetic properties relevant for industrial applications. However, antiphase boundaries commonly found in spinel ferrite films can hinder their use in spintronic devices and sensors due to their impact on magnetic degradation and magnetoresistance. Novel imaging techniques and computational methods have been employed to investigate the atomic structure and magnetic properties of individual antiphase boundaries, providing insights into magnetic coupling at the atomic scale.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Alok Singh, Takanobu Hiroto, Hiroyuki Watanabe, Naoko Ikeo, Toshiji Mukai, Koichi Tsuchiya
Summary: Addition of Al to equiatomic high entropy alloy promotes formation of BCC phase and sigma phase. Straining by caliber rolling induces morphological changes related to planar faults, where sigma phase nucleates first on the matrix faults followed by formation of B2 phase driven by elemental concentration changes. This study provides insights into the formation mechanisms of different phases in the alloy.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Lipeng Ding, Mingqi Zhao, Zhihong Jia, Yaoyao Weng, Kaiyun Xiang, Xiaozhi Wu, Qing Liu
Summary: The nature and orientation of anti-phase boundaries (APBs) and interphase boundaries in Al3Zr precipitates of the Al-Cu-Zr alloy were investigated using aberration-corrected STEM. Two groups of APBs ({100} and {110}) were identified, with {100} APBs being more common and {110} APBs observed for the first time. Two different L1(2)/D0(23) interfaces were formed in the Al3Zr precipitates, mainly due to the activation of multiple APBs in different planes, highlighting the important role of APBs in the L1(2)-D0(23) transformation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Nadine Eissmann, Uwe Muehle, Uwe Gaitzsch, Gunnar Walther, Thomas Weissgaerber, Bernd Kieback
Summary: The effect of titanium addition beyond the solubility limit was investigated to demonstrate the precipitation hardening possibility of the Cantor alloy CoCrFeMnNi. Following appropriate heat treatment, a significant increase in hardness was detected due to nanometer-sized precipitates identified through TEM analysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Xu Liu, Lin Song, Andreas Stark, Uwe Lorenz, Zhanbing He, Junpin Lin, Florian Pyczak, Tiebang Zhang
Summary: This study investigates the high-temperature deformation and decomposition mechanisms of the alpha(2) phase in a beta-solidified TiAl alloy. The results show that beta(o) and omega(o) phases precipitate within the equiaxed alpha(2) phase at 800 degrees C, indicating the alpha(2) -> beta(o) -> omega(o) transformation. Additionally, gamma phase precipitates form within the beta(o) matrix, and the alpha(2) lamellae decompose into ultrafine (alpha(2) + gamma) lamellae and coarsened gamma lamellae through alpha(2) -> alpha(2) + gamma and alpha(2) -> gamma transformations, respectively. Furthermore, the omega(o) phase nucleates within the ultrafine lamellae via alpha(2) -> omega(o) transformation. However, at 1000 degrees C, the nucleation of beta(o) particles is sluggish due to the efficient release of internal stress via dynamic recrystallization (DRX). These findings suggest that the decomposition of the alpha(2) phase can introduce complex phase transformations in TiAl alloys with a high amount of beta-stabilizing elements.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
James E. Butler, Anatoly Vikharev, Alexei Gorbachev, Mikhail Lobaev, Anatoly Muchnikov, Dmitry Radischev, Vladimir Isaev, Valerii Chernov, Sergey Bogdanov, Mikail Drozdov, Evgeniy Demidov, Ekaterina Surovegina, Vladimir Shashkin, Albert Davidov, Haiyan Tan, Louisa Meshi, Alexander C. Pakpour-Tabrizi, Marie-Laure Hicks, Richard B. Jackman
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2017)
Article
Chemistry, Physical
V. Y. Zenou, G. Rafailov, I. Dahan, A. Kiv, L. Meshi, D. Fuks
JOURNAL OF ALLOYS AND COMPOUNDS
(2017)
Article
Materials Science, Multidisciplinary
Yael Templeman, Guy Ben Hamu, Louisa Meshi
MATERIALS CHARACTERIZATION
(2017)
Article
Nanoscience & Nanotechnology
A. Munitz, L. Meshi, M. J. Kaufman
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2017)
Article
Nanoscience & Nanotechnology
Yatir Linden, Malki Pinkas, Abraham Munitz, Louisa Meshi
SCRIPTA MATERIALIA
(2017)
Meeting Abstract
Chemistry, Multidisciplinary
Louisa Meshi, Gili Yaniv, Manor Sasportas, David Fuks
ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES
(2017)
Article
Chemistry, Multidisciplinary
Louisa Meshi, Shmuel Samuha
ADVANCED MATERIALS
(2018)
Article
Chemistry, Physical
Gili Yaniv, David Fuks, Louisa Meshi
Article
Chemistry, Physical
Louisa Meshi, Gili Yaniv, Pavel Horak, Jiri Vacik, Natalia Mykytenko, Gennady Rafailov, Itzchak Dahan, David Fuks, Arik Kiv
Article
Materials Science, Multidisciplinary
Polina Metalnikov, Guy Ben-Hamu, Yael Templeman, Kwang Seon Shin, Louisa Meshi
MATERIALS CHARACTERIZATION
(2018)
Article
Materials Science, Multidisciplinary
Guy Hillel, Lior Natovitz, Shai Salhov, Shlomo Haroush, Malki Pinkas, Louisa Meshi
Article
Multidisciplinary Sciences
Rimon Tamari, Benjamin Grushko, Louisa Meshi
Summary: Binary high temperature Al3Mn (T-phase) and its extensions in ternary systems have been extensively studied in crystallography. The presence of a center of symmetry in these structures has been a topic of debate. Our research on the Al-Mn-Pt T-phase demonstrates that within a continuous homogeneity region, the Al-rich T-phase belongs to the non-centrosymmetric space group Pna2(1), while the Al-poor T-phase is centrosymmetric, specifically Pnam. This change in symmetry is explained based on metallurgical and crystallographic considerations.
Article
Materials Science, Multidisciplinary
Yarden Melamed, Nabasmita Maity, Louisa Meshi, Noam Eliaz
Summary: Electrodeposition of pure aluminum on copper and nickel substrates from an ionic liquid at room temperature was successfully achieved, resulting in dense and homogeneous aluminum deposits with nanocrystalline structure. The process exhibited a quasi-reversible reaction with current affected by both charge transfer and mass transport. Additionally, the deposition rate and grain size could be significantly improved by adjusting the applied cathodic potential.
Meeting Abstract
Chemistry, Multidisciplinary
Wenchun Feng, Ji-Young Kim, Xinzhi Wang, Heather Calcaterra, Zhibei Qu, Louisa Meshi, Nicholas Kotov
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2017)
Article
Materials Science, Multidisciplinary
Shuai Zhang, Shuye Zhang, Hongzhi Zhou, Kyung-Wook Paik, Tianran Ding, Weimin Long, Sujuan Zhong, Peng He
Summary: Microwave Hybrid Heating (MHH) is a promising method for material joining, allowing for selective and uniform heating. This experimental study focused on investigating the characteristics and reliability of joints made using nano-Sn-3.0Ag-0.5Cu soldering paste and MHH technique. The research findings showed that the shear strength of the joints reached its peak value under specific microwave power and exposure time, but decreased after thermal shock tests.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Peibin Ma, Mingyang Wang, Aiying Chen, Lijian Gu, Zhiyi Ding, Xiaogui Wang, Bin Gan
Summary: Nano-twinned boundaries in high-temperature alloys play a crucial role in regulating the distribution of nano-precipitates and enhancing mechanical properties.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jiachen Zhang, Fan Lu, Xinxin Liu, Taiwen Huang, Rui Li, Changsheng Tan, Guojun Zhang, Lin Liu
Summary: This study investigates the effects of Re and Ta interactions on the precipitation of the TCP phase in experimental alloys under long-term thermal exposure. The study finds that microstructure segregation is not fully eliminated even with standard heat treatment, and the interaction between Re and Ta enhances the formation of the TCP phase. Thermodynamic calculations and first-principles analysis reveal that Re significantly improves the driving force of TCP phase precipitation. The study also observes a phase transition from the sigma-phase to the P-phase, with Ni playing a crucial role in the diffusion process.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Ronit Roy, Adil Shaik, Matthew Topping, Fei Long, Mark R. Daymond
Summary: This study demonstrates the improvements in characterizing localized dislocation distribution using the HR-EBSD method compared to the conventional approach. Two extreme examples of deformation conditions were investigated to show the efficacy of HR-EBSD in identifying dislocations and subtle features. The direct correlation between slip bands and HR-EBSD estimated GNDs is also presented, enhancing the scope of this approach in identifying individual slip bands.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wenshan Guo, Hui Zhang, Qingjun Zhou, Guangchun Xiao, Ning Guo, Wei Zhao, Gang Wang
Summary: The microstructures and corrosion resistance of TC11 components were significantly improved using a high-power, high-speed laser metal deposition (LMD) process and subsequent post-heat treatment, with greater improvements observed in the deposition direction. The significant improvement of corrosion resistance in the deposition direction is mainly due to the weakening of the charged galvanic corrosion effect between the non-interlayer zone and interlayer zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Xu, Rui Cao, Junheng Gao, Yu Zhang, Haitao Zhao, Shuize Wang, Yuhe Huang, Guilin Wu, Honghui Wu, Chaolei Zhang, Xinping Mao
Summary: In this study, the microstructures and mechanical properties of interphase precipitation strengthening micro-alloyed steels were investigated. The addition of Cr was found to increase the yield strength without significant decrease of ductility. Thermodynamics analysis revealed that the addition of Cr led to grain refinement and decrease of sheet spacing of nanoprecipitates. Calculations showed that the decrease of interphase-precipitated carbides sheet spacing and the refinement of grain size were responsible for the strength enhancement of Cr microalloyed steel.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhaoxin Zhong, Biao Zhang, Yuhan Ren, Jian Ye, Jiawei Zhang, Feng Ye
Summary: In this study, bioinspired web-liked multiphase composites were successfully constructed using boron-modified polysilazane polymer. The composites consisted of long TiB nanowires as 'web' and hybrid TiC and Ti3Si particles as 'nodes'. The enhanced strength of these composites was attributed to the synergistic load transfer of the hybrid reinforcements. This study provides a promising design approach for developing high-performance composites with high reinforcement content, utilizing polymer instead of traditional ceramic powder.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Geng Liu, Linran Yu, Jie Su, Ran Ding, Min Xiong, Qi Gao
Summary: In this study, a flash austenitization heat treatment approach was used to achieve a dual-phase microstructure consisting of retained austenite and fine-grained ferrite in low-carbon TRIP steel. Phase-field simulations revealed the acceleration of ferrite transition kinetics in the Mn-depleted region and the influence of chemical heterogeneity of C and Mn on the stabilization of austenite.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhichao Yang, Dehui Zheng, Zhen Wang, Tingbin Liang, Shuangbao Wang
Summary: In this study, the configurations, formation process, and properties of the Cu-rich layer formed during TJE of Al alloys were revealed using aberration-corrected scanning TEM (STEM), STEM image simulations, and first-principles calculations. The results showed a new orientation relationship between the Cu-rich layer and Al matrix, and provided insights into the formation mechanisms of the Cu-rich layer and Cu diffusion zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Chen, Ruyu Tian, Jiayue Wen, Yanhong Tian
Summary: In this study, the interfacial microstructure evolution and reliability of Cu/Sn-3.0Ag-0.5Cu (SAC305)/Ni and Cu/Sn-3.0Ag-0.5Cu-0.05TiO2 (SAC305-0.05TiO2)/Ni interconnections under thermal shock were investigated. The results showed that the addition of TiO2 nanoparticles can suppress the growth of interfacial IMCs and improve the reliability of the connections.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Yunbin Lu, Yangju Feng, Wei Wang, Wenke Wang, Jianlei Yang, Wenzhen Chen, Guorong Cui, Dongdong Zhuang, Hongyang Cao
Summary: In order to improve the wear resistance of titanium alloy, titanium matrix composites with network distributed TiBw were fabricated. The results showed that the wear rate of the composites decreased by 17.2% at room temperature and 38.4% at high temperature compared to the TA15 alloy. The TiBw in the composites enhanced work hardening, improved thermal conductivity, and effectively hindered dislocation movement and promoted dynamic recrystallization during high-temperature wear.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jubert Pasco, Lu Jiang, Thomas Dorin, Ali Keshavarzkermani, Youliang He, Clodualdo Aranas Jr
Summary: The unique structure and solute distribution of CoCrMo alloys produced using Laser Powder Bed Fusion technique require custom heat-treating processes to achieve the targeted phase distribution and mechanical properties. This study investigates the phase transformation behavior and precipitate distribution of CoCrMo samples after aging heat treatment. The results show differences in phase fraction and nucleation sites between directly aged and solution heat-treated samples.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zipeng Ma, Meng Zhou, Baohong Tian, Yi Zhang, Heng Li, Xu Li, Jin Zou, Haoyan Hu, Ke Jing, Yong Liu, Alex A. Volinsky
Summary: In this study, two electrical contact composites were prepared using the vacuum hot pressing sintering endo-oxidation method. The addition of Y2O3 had no negative effects on the electrical conductivity and hardness of the composites. Moreover, it reduced the welding force and arc energy, and improved the stability of the contacts.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wei Sun, Ning Cui, Shuling Zhang, Tiewei Xu, Xiaopeng Wang, Fantao Kong
Summary: A laminated composite was successfully fabricated and its microstructure and mechanical properties were investigated. The composite exhibited high bonding strength, improved flexural strength and fracture toughness, and superior tensile properties compared to the monolithic alloy.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zih-You Wu, Yin-Ku Lee, Su-Yueh Tsai, Po-Yu Chen, Jenq-Gong Duh
Summary: With the development of the artificial intelligence (AI) industries, electronic packaging is advancing towards high density, high efficiency, and multi-functionality. The application of microbumps is necessary to achieve high density and small-scale interconnection. In this study, three types of full intermetallic compounds (IMCs) bumps were fabricated, and the mechanical and thermal properties of IMCs were analyzed. The results showed that the full IMCs bumps with added Ni and Zn exhibited consistent structure and excellent thermal stability, providing a reliable microstructure for application.
MATERIALS CHARACTERIZATION
(2024)
