Article
Materials Science, Multidisciplinary
J. Gallet, M. Perez, R. Guillou, C. Ernould, C. Le Bourlot, C. Langlois, B. Beausir, E. Bouzy, T. Chaise, S. Cazottes
Summary: The study measured dislocation densities on samples using different methods including TEM, ECCI, HR-EBSD, and XRD. The observed dislocation types varied among the methods. Imaging methods were accurate for low deformation, while HR-EBSD showed good agreement with other methods. Imaging methods were not suitable for high deformation due to increasing uncertainty. The different results highlight the limitations of each method.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Senzhen Wang, Shun Xu, Chongchen Xiang, Zijian Wang, Hanlin Ding
Summary: This study investigates the mechanisms of <111> dislocation transmission at low angle grain boundaries and high angle grain boundaries in Ti-5553 alloy. It is found that low angle grain boundaries have higher geometric alignment and lower residual Burgers vector magnitude, making them more conducive for dislocation transfer.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Shaoxin Zhou, Jiancan Yang, Yingchao Zhang, Peng Zhang, Zuoren Nie
Summary: Tungsten has poor processing performance and is prone to defects due to its brittleness. Investigating the effect of grain size on rotary swaging of sintered rods can improve the quality of the destination part. Increasing grain size within a certain range is advantageous for processing technology.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
Shigeto Yamasaki, Hirofumi Matsuo, Tatsuya Morikawa, Masaki Tanaka
Summary: This paper proposes a method for obtaining microscopic and localized stress-strain curves by combining strain measurements using the digital image correlation (DIC) method with stress measurements using high-resolution electron backscattered diffraction (HR-EBSD). By applying georeferencing to DIC strain maps and HR-EBSD stress maps measured in a deformation-interrupted microstructure, a dataset containing 11 steps of stress-strain information in a single subset was created. This analysis allows for obtaining local stress-strain curves and strain energy maps of polycrystalline nickel alloys. A comparison of the stress-strain curves obtained from any subset in the map reveals that these curves show extremely diverse shapes depending on the location in the microstructure.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Tae-Young Kim, Tae-Wook Na, Hyung-Seok Shim, Yong-Keun Ahn, Yong-Kwon Jeong, Heung Nam Han, Nong-Moon Hwang
Summary: The study examines the penetrating morphologies at the growth front of abnormally-growing Goss grains in Fe-3%Si steel, suggesting a mechanism of sub-boundary enhanced solid-state wetting. Various grain boundary characteristics and misorientation angles are investigated, indicating the possibility of solid-state wetting along the triple junction line as a driving force for abnormal grain growth.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Jianwen Le, C. J. Boehlert, Guangfa Huang, Jianwei Mao, Liming Lei, Yuanfei Han, Weijie Lu
Summary: This study confirms the role of TiB whiskers in the selection of alpha variants and investigates the dependence of the variant-selection degree on the cooling rate.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Xianfeng Liao, Linhan Li, Kalubi Ren, Yanlin Jia, Yong Pang, Zhu Xiao, Yanbin Jiang, Zhou Li
Summary: The effects of grain size, grain boundary type, and misorientation on the initiation of discontinuous precipitates in a Cue5Ni e1.25Si alloy are investigated in this study. It is found that smaller grain sizes result in a higher percentage of discontinuous precipitates. Only random grain boundaries are capable of initiating discontinuous precipitates, while coincident site lattice boundaries are not. There is also a difference in the initiation of discontinuous precipitates depending on the misorientation axis.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Vivian Tong, Helen Jones, Ken Mingard
Summary: The plastic deformation mechanisms of tungsten carbide at different temperatures and orientations are influenced by residual defect structures, but the relationship between them is still unclear. A study using lattice rotation axis analysis can discriminate different slip modes, and the experimental observations are consistent with the model proposed in this research.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Akbar Heidarzadeh, Roghayeh Mohammadzadeh, Hamid Reza Jafarian, Catalin Iulian Pruncu, Aude Simar
Summary: The study reveals the contribution of GNDs and GBs to the mechanical properties of different zones in a friction stir welded pure copper joint, with higher GNDs density in the weld. Differences among zones are mainly related to the distribution of dislocations.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Huanqing Li, Xiaona Wang, Haibin Zhang, Xiaolin Tian, Hua Hou, Yuhong Zhao
Summary: In this study, the grain-boundary dislocation arrangement and decomposition during constant-volume deformation of a nanoscale bi-crystal system in fcc-structured materials were investigated using the two-mode phase-field crystal (2PFC) method. The effects of different grain boundary misorientations and tensile deformation directions were analyzed. It was found that the stress at the grain boundary is concentrated with the increase of strain, and dislocation decomposition can effectively reduce the stress concentration. The results also showed that the time steps of dislocation decomposition at grain boundaries decrease with increasing strain rate.
FRONTIERS IN MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Zhiping Wang, Hongyu Xiao, Wei Chen, Yugang Li, Jiwei Geng, Keneng Li, Peikang Xia, Mingliang Wang, Xianfeng Li, Dong Chen, Haowei Wang
Summary: The dependence of grain boundary structure on precipitation at grain boundaries (GBs) in a TiB2/Al-Zn-Mg-Cu composite has been systematically investigated. It was found that the average size and coverage of grain boundary precipitates (GBPs) increase while the number density decreases with the increasing misorientation of low angle GBs (LAGBs). For high angle GBs (HAGBs), the coincidence site lattice (CSL) GBs and TiB2 particles have an effect on GBPs. The results indicate that TiB2 particles promote the nucleation of GBPs while limiting their growth.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Li Zhenliang, Tian Dongkuo
Summary: The microstructure evolution of AZ80 magnesium alloy under different conditions is influenced by grain boundary migration and geometrically necessary dislocations density. With the migration of grain boundaries, the increase of low-angle grain boundaries and the change in recrystallization area are significant. The variation of geometrically necessary dislocations density affects the formation of twins and rotational movement between grains.
RARE METAL MATERIALS AND ENGINEERING
(2021)
Article
Nanoscience & Nanotechnology
Kewei Chen, De Jun Huang, Hua Li, Ning Jia, Warren Chong
Summary: The study showed that appropriate control of annealing time at 700 degrees Celsius can mitigate abnormal grain growth in SLM CP-Ti, resulting in fine equiaxed grains and improved tensile properties.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Eunji Song, Hansol Jeon, Eun-Ji Gwak, Jun-Yun Kang, Ju-Young Kim
Summary: The study observes that nanoporous gold (np-Au) with fine grains exhibits enhanced resistance to crack propagation compared to np-Au with coarse grains. This enhanced crack resistance in fine-grained np-Au is achieved through effective strain energy release via grain boundary plasticity.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Jingqi Zhang, Yingang Liu, Mohamad Bayat, Qiyang Tan, Yu Yin, Zhiqi Fan, Shiyang Liu, Jesper Henri Hattel, Matthew Dargusch, Ming-Xing Zhang
Summary: This study demonstrates that in-situ grain refinement of CP-Ti can be achieved through controlling SLM parameters, with higher input energy density favoring grain refinement. Detailed microstructural characterization and multi-physics simulation were conducted to reveal the grain refinement mechanism. The refined CP-Ti showed high ductility without notable mechanical anisotropy, attributed to the intrinsic heat treatment effect resulting from the cyclic reheating in the SLM process.
SCRIPTA MATERIALIA
(2021)
Article
Microscopy
T. J. Ruggles, Y. S. J. Yoo, B. E. Dunlap, M. A. Crimp, J. Kacher
Article
Microscopy
R. D. Kerns, S. Balachandran, A. H. Hunter, M. A. Crimp
Article
Materials Science, Multidisciplinary
W. C. Lenthe, L. Germain, M. R. Chini, N. Gey, M. De Graef
Article
Nanoscience & Nanotechnology
Safaa Lhadi, Ravi Raj Purohit Purushottam Raj Purohit, Thiebaud Richeton, Nathalie Gey, Stephane Berbenni, Olivier Perroud, Lionel Germain
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Article
Materials Science, Biomaterials
Adam C. Marsh, Yaozhong Zhang, Lucrezia Poli, Neal Hammer, Aljoscha Roch, Martin Crimp, Xanthippi Chatzistavrou
Summary: The FFF technique was successfully used to fabricate novel 3D printed silicate bioactive and antibacterial Ag-doped glass-ceramic (Ag-BG) scaffolds. The developed Ag-BG filaments showed promising characteristics for orthopedic applications, with excellent compressive strength and antibacterial effects demonstrated in vitro.
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Taylan Ors, Fanny Gouraud, Vincent Michel, Marc Huger, Nathalie Gey, Jean-Sebastien Micha, Olivier Castelnau, Rene Guinebretiere
Summary: Pure zirconia undergoes two solid-state phase transitions from the liquid state to room temperature, with the last transition being martensitic and leading to large volume variations and shear strains. Elastic and inelastic behaviors of zirconia-based materials are strongly influenced by the strain and stress fields induced by this transition. The strains map at the crystal scale in zirconia polycrystals shows huge fluctuations in deviatoric elastic strain, with associated stress levels in the range of 5 GPa and stress gradients of 1 GPa μm(-1).
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Ryan Sperry, Songyang Han, Zhe Chen, Samantha H. Daly, Martin A. Crimp, David T. Fullwood
Summary: This study assessed the use of various methods including SEM-DIC, AFM, ECCI, and HR-EBSD to characterize slip-system activity on Ti-7Al material. The comparison presented the advantages, disadvantages, and effective complementary use of these methods. The study showed that by using these methods in tandem, multi-modal information on slip band identification, strain and orientation gradients, and the presence of GNDs and SSDs can be obtained to inform and validate dislocation-based crystal plasticity models.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Ravi Raj Purohit Purushottam Raj Purohit, Thiebaud Richeton, Stephane Berbenni, Lionel Germain, Nathalie Gey, Thomas Connolley, Olivier Castelnau
Summary: In this study, a Bayesian framework was used to identify the three cubic elastic constants of the beta phase in the Ti-1023 alloy. The study also revealed that the grain aspect ratio is an important parameter affecting the identified single-crystal elastic constants.
Article
Materials Science, Multidisciplinary
J. Genee, N. Gey, F. Bonnet, R. A. Lebensohn, S. Berbenni
Summary: This study investigated the plastic deformation mechanism of an iron-based matrix composite reinforced by TiB2 particles through experiments and numerical simulations. The results showed that GNDs tend to accumulate at matrix/particle interfaces, with hot-spots located at the tips of elongated particles. The key influence of two main microstructural features, particle morphology and particle clustering, on the distribution of GNDs was highlighted.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Yang Su, Songyang Han, Philip Eisenlohr, Martin A. Crimp
Summary: A new model has been proposed to predict the specific deformation system activity at grain boundaries, with promising results in testing. The optimized parameters indicate that both local and global stresses play a role in determining the accommodating systems and their activity. The model's predictions align well with literature values for alpha-titanium.
Article
Engineering, Multidisciplinary
Xueliang Wang, Yang Su, Songyang Han, Martin A. Crimp, Yaping Wang, Yu Wang
Summary: The study found that the elastic recovery behavior induced by MLG significantly increased the hardness in the Cu/MLG interface region, and also revealed the gradient strengthening effect, which can be used to precisely enhance the mechanical performance of copper matrix composite materials by adjusting the interfacial microstructure and properties.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
T. Martinez Ostormujof, R. R. P. Purushottam Raj Purohit, S. Breumier, N. Gey, M. Salib, L. Germain
Summary: This study explores the application of Convolutional Neural Networks in extracting features from EBSD data for automatic phase classification, using ferrite-martensite discrimination as a case study. The results show that utilizing orientation-derived parameters can improve classification accuracy, and the proposed models achieve higher accuracies in shorter times compared to other methods.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
S. Breumier, T. Martinez Ostormujof, B. Frincu, N. Gey, A. Couturier, N. Loukachenko, P. E. Aba-perea, L. Germain
Summary: In this study, a U-Net model was trained to segment bainite, ferrite, and martensite on EBSD maps using the kernel average misorientation and the pattern quality index as input. The introduction of an unknown class during training simplified the manual labeling process. The investigation of providing maps with different acquisition steps, indexation quality, and constituent content to the model highlighted the significance of training the model with a diverse range of configurations. The model achieved a 92% mean accuracy in differentiating the three constituents. The inclusion of an additional channel containing the map acquisition step aided the model in generalizing to various EBSD acquisition steps.
MATERIALS CHARACTERIZATION
(2022)
Article
Physics, Applied
Mingmin Wang, Anatolii Polyanskii, Shreyas Balachandran, Santosh Chetri, Martin A. Crimp, Peter J. Lee, Thomas R. Bieler
Summary: This study investigates the effects of grain boundaries, hydrogen, and dislocations on the superconducting properties of Nb bi-crystals. It is found that both GB character and hydrogen content affect magnetic flux penetration, while dislocation structures and low angle GBs facilitate flux penetration.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Eyram Tsekpuia, Adrien Guery, Nathalie Gey, Stephane Berbenni
Summary: A new microstructure-informed three-scale homogenization scheme is developed to predict the mechanical behavior of cast duplex AF steels. The scheme models the elasto-viscoplastic behavior of single crystals at the microscale and an EBSD-informed two-phase laminate structure model at the mesoscale. The macroscale considers a single primary grain as an aggregate of spherical two-phase laminate structure domains. The results provide insights into the stress/strain responses in different phases and the effects of crystallographic orientation and aging.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Nanoscience & Nanotechnology
Jie Zhang, Xiaoyang Chen, MingJian Ding, Jiaqiang Chen, Ping Yu
Summary: This study enhances the compositional inhomogeneity of relaxor ferroelectric thin films to improve their dielectric temperature stability. The prepared films exhibit a relatively high dielectric constant and a very low variation ratio of dielectric constant over a wide temperature range.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xiaoyu Chen, Ranran Zhang, Hao Zou, Ling Li, Qiancheng Zhu, Wenming Zhang
Summary: Polyaniline-manganese dioxide composites exhibit high conductivity, long discharge platform, and stable circulation, and the specific capacity is increased by providing additional H+ ions to participate in the reaction.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xutao Huang, Yinping Chen, Jianjun Wang, Gang Lu, Wenxin Wang, Zan Yao, Sixin Zhao, Yujie Liu, Qian Li
Summary: This study aims to establish a novel approach to better understand and predict the behavior of materials with multi-scale lamellar microstructures. High-resolution reconstruction and collaborative characterization methods are used to accurately represent the microstructure. The mechanical properties of pearlite are investigated using crystal plasticity simulation and in-situ scanning electron microscopy tensile testing. The results validate the reliability of the novel strategy.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Cheng Chen, Fanchao Meng, Jun Song
Summary: This study systematically investigated the unfaulting mechanism of single-layer interstitial dislocation loops in irradiated L12-Ni3Al. The unfaulting routes of the loops were uncovered and the symmetry breaking during the unfaulting processes was further elucidated. A continuum model was formulated to analyze the energetics of the loops and predict the unfaulting threshold.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Darshan Bamney, Laurent Capolungo
Summary: This work investigates the formation of adjoining twin pairs (ATPs) at grain boundaries (GBs) in hexagonal close-packed (hcp) metals, focusing on the co-nucleation (CN) of pairs of deformation twins. A continuum defect mechanics model is proposed to study the energetic feasibility of CN of ATPs resulting from GB dislocation dissociation. The model reveals that CN is preferred over the nucleation of a single twin variant for low misorientation angle GBs. Further analysis considering GB character and twin system alignment suggests that CN events could be responsible for ATP formation even at low m' values.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Bing Han, Zhengqian Fu, Guoxiang Zhao, Xuefeng Chen, Genshui Wang, Fangfang Xu
Summary: This study investigates the behavior of electric-field induced antiferroelectric to ferroelectric (AFE-FE) phase transition and reveals the evolution of atomic displacement ordering as the cause for the transition behavior changing from sharp to diffuse. The novel semi-ordered configuration results from the competing interaction between long-range displacement modulation and compositional inhomogeneity, which leads to a diffuse AFE-FE transition while maintaining the switching field.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Akib Jabed, Golden Kumar
Summary: This study demonstrates that cryogenic rejuvenation promotes homogeneous-like flow and increases ductility in metallic glass samples. Conversely, annealing has the opposite effect, resulting in a smoother fracture surface.
SCRIPTA MATERIALIA
(2024)
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
Nanoscience & Nanotechnology
Amit Samanta, Prasanna Balaprakash, Sylvie Aubry, Brian K. Lin
Summary: This study proposes a combined large-scale first principles approach with machine learning and materials informatics to quickly explore the chemistry-composition space of advanced high strength steels (AHSS). The distribution of aluminum and manganese atoms in iron is systematically explored using first principles calculations to investigate low stacking fault energy configurations. The use of an automated machine learning tool, DeepHyper, speeds up the computational process. The study provides insights into the distribution of aluminum and manganese atoms in systems containing stacking faults and their effects on the equilibrium distribution.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Guowei Zhou, Yuanzhe Hu, Zizheng Cao, Myoung Gyu Lee, Dayong Li
Summary: In this work, a physics-constrained neural network is used to predict grain-level responses in FCC material by incorporating crystal plasticity theory. The key feature, shear strain rate of slip system, is identified based on crystal plasticity and incorporated into the loss function as physical constitutive equations. The introduction of physics constraints accelerates the convergence of the neural network model and improves prediction accuracy, especially for small-scale datasets. Transfer learning is performed to capture complex in-plane deformation of crystals with any initial orientations, including cyclic loading and arbitrary non-monotonic loading.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Pengfei Yang, Qichang Li, Zhongying Wang, Yuxiao Gao, Wei Jin, Weiping Xiao, Lei Wang, Fusheng Liu, Zexing Wu
Summary: In this study, the HER performance of Ru-based catalysts is significantly improved through the dual-doping strategy. The obtained catalyst exhibits excellent performance in alkaline freshwater and alkaline seawater, and can be stably operated in a self-assembled overall water splitting electrolyzer.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Ilias Bikmukhametov, Garritt J. Tucker, Gregory B. Thompson
Summary: Depositing a Ni-1at. % P film can facilitate the formation of multiple quintuple twin junctions, resulting in a five-fold twin structure and a pentagonal pyramid surface topology. The ability to control material structures offers opportunities for creating novel surface topologies, which can be used as arrays of field emitters or textured surfaces.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Zening Yang, Weiwei Sun, Zhengyu Sun, Mutian Zhang, Jin Yu, Yubin Wen
Summary: Multicomponent oxides (MCOs) have wide applications and accurately predicting their thermal expansion remains challenging. This study introduces an innovative attention-based deep learning model, which achieves improved performance by using two self-attention modules and demonstrates adaptability and interpretability.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Ze Liu, Cai Chen, Yuanxun Zhou, Lanting Zhang, Hong Wang
Summary: This study attempts to address the gap in cooling rates between thin film deposition and bulk metallic glass (BMG) casting by correlating the glass-forming range (GFR) determined from combinatorial materials chips (CMCs) with the glass-forming ability (GFA) of BMG. The results show that the full-width at half maximum (FWHM) of the first sharp diffraction peak (FSDP) is a good indicator of BMG GFA, and strong positive correlations between FWHM and the critical casting diameter (Dmax) are observed in various BMG systems. Furthermore, the Pearson correlation coefficients suggest possible similarities in the GFA natures of certain BMG pairs.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Mike Schneider, Jean-Philippe Couzinie, Amin Shalabi, Farhad Ibrahimkhel, Alberto Ferrari, Fritz Koermann, Guillaume Laplanche
Summary: This work aims to predict the microstructure of recrystallized medium and high-entropy alloys, particularly the density and thickness of annealing twins. Through experiments and simulations, a database is provided for twin boundary engineering in alloy development. The results also support existing theories and empirical relationships.
SCRIPTA MATERIALIA
(2024)
