Article
Materials Science, Multidisciplinary
O. V. Pshyk, X. Li, I. Petrov, D. G. Sangiovanni, J. Palisaitis, L. Hultman, G. Greczynski
Summary: Traditional age hardening mechanisms in refractory ceramics involve the precipitation of fine particles. In this study, Guinier-Preston zone hardening, previously known in soft light-metal alloys, was found to occur in refractory ceramics like multicomponent nitrides. The discovery of added superhardening in Ti-Al-W-N thin films upon high temperature annealing, due to the formation of W disks on {111} planes, offers a new approach for developing advanced materials with exceptional mechanical properties and wider operational temperature range for future applications.
Article
Nanoscience & Nanotechnology
T. T. Sasaki, J. Y. Lin, P. Yi, Z. H. Li, S. E. Prameela, A. Park, E. Lipkin, A. Lee, M. L. Falk, T. P. Weihs, K. Hono
Summary: In this study, the deformation-induced precipitation of G.P. zones in Mg-9Al and Mg-5 Zn alloys during equal channel angular extrusion has been reported. Atom probe tomography and hybrid molecular dynamics/Monte Carlo simulations suggest that strategic control of atomic-scale defects can generate novel microstructures, thereby strengthening the deformed Mg alloys.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
A. E. Davis, J. R. Kennedy, D. Lunt, J. Guo, D. Strong, J. D. Robson
Summary: Preageing technique can significantly increase the hardness of magnesium alloys, reduce total ageing times, and provide a certain degree of customization of mechanical properties through control of precipitate habit plane and morphology. However, the effectiveness of this technique depends on the alloy system, with the focus on the fundamental processes of precipitate nucleation and phase evolution.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Ling Ou, Lin-Yan Li, Fan-Cai He, Yu-Feng Nie, Shi-Chen Li
Summary: Using first-principles calculations, the energetics of Guinier-Preston zone (GPZ) formation in response to external strain in the Al-Cu system was systematically investigated. The results showed that when the applied strain exceeded a certain threshold, the precipitation of GPZ preferentially occurred parallel (perpendicular) to the direction of tensile (compressive) strain, and the precipitation energy of GPZ had a parabolic relationship with the magnitude of strain. The variation of precipitation energy was related to the misfit between GPZ and the matrix, which affected the number of bonding electrons below the Fermi level.
Article
Nanoscience & Nanotechnology
H. Yan, X. H. Shao, H. P. Li, R. S. Chen, H. Z. Cui, En-Hou Han
Summary: By modifying the texture and nano-precipitates, a dilute magnesium alloy sheet was designed to achieve a synergization of ductility and yield strength, resulting in good performance with a combination of elongation and yield strength.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Xinsheng Huang, Mingzhe Bian, Yasumasa Chino
Summary: The effects of aging precipitation on microstructure, deep drawing formability, and tensile properties of Mg-6Al-1Zn alloy sheets were investigated. It was found that aging at high temperature significantly improved the deep drawability, resulting in an increased limiting drawing ratio. This improvement can be attributed to the prevention of cracking at the edge of the drawn cup by restricting the growth of tensile twins and basal slip through aging precipitation.
SCRIPTA MATERIALIA
(2022)
Article
Metallurgy & Metallurgical Engineering
Suming Zhu, Trevor B. Abbott, Jian-Feng Nie, Hua Qian Ang, Dong Qiu, Kazuhiro Nogita, Mark A. Easton
Summary: The re-evaluation of magnesium die-casting alloy AE44 with minor Mn addition shows that T5-aged AE44 exhibits a better strength-ductility combination and improved creep resistance. The findings suggest that precipitation hardening of the alpha-Mg matrix plays a more important role than grain boundary reinforcement by intermetallic phases in enhancing the creep resistance of die-cast Mg alloys. These results could open up new application perspectives for AE44, particularly in the automotive industry.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
J. D. Robson, A. D. Smith, J. Guo, J. M. Donoghue, A. E. Davis
Summary: Competitive continuous and discontinuous precipitation (CP and DP) in magnesium alloys have been studied in-situ for the first time. The migration of the high angle grain boundary (reaction front, RF) behind which DP occurs is found to be irregular instead of steady-state. Local effects play a key role in causing the irregular motion of the RF.
Article
Nanoscience & Nanotechnology
Mingzhe Bian, Xinsheng Huang, Yasumasa Chino
Summary: Dilute magnesium-aluminum-calcium-manganese alloys have high strength after short periods of artificial aging, but low room temperature formability. We report that the addition of a small amount of copper substantially increases the Erichsen value of the Mg-0.5Al-0.5Ca-0.3Mn alloy, due to weakened sheet texture and variation in basal pole figure distribution. The 0.03 wt% Cu-containing alloy showed an Erichsen value of 7.4 mm, significantly higher than the Cu-free alloy (5.2 mm).
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Steffen Lotz, Emad Scharifi, Ursula Weidig, Kurt Steinhoff
Summary: The increasing demand for hot stamped aluminum components in automotive and aerospace industries has led to the need for efficient and resource-conserving thermo-mechanical processes. This study focuses on the combined effect of forming and aging processes on the mechanical properties of high-strength aluminum alloys AA6082 and AA7075. Two different thermo-mechanical aging process strategies are proposed, resulting in significant reduction in process time from 24 h to 5 h while maintaining similar mechanical properties as the conventional T6 peak aged condition.
Article
Nanoscience & Nanotechnology
Junlei Zhang, Shengjie Han, Yuhong Sun, Xiang Chen, Peng Chen, Zulai Li, Guangsheng Huang, Fusheng Pan
Summary: In this study, three types of WE43 plates with different heat treatments were studied. The microstructure and mechanical properties of these plates were investigated. It was found that the number of precipitates increased as a result of aging after extrusion. The coarse grains and high Schmid factor led to the highest hardness and limited plasticity in the solution-aging after extrusion plates. The T5 plates showed the highest strength due to fine grains and multiple precipitates, while the T6 plates exhibited low ductility because of grain boundary and twin boundary cracking.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Diego de Araujo Santana, Claudio Shyinti Kiminami, Francisco Gil Coury
Summary: This study focuses on the prediction of yield strength of a newly developed alloy through experimental and modeling approaches. The results demonstrate that different strengthening mechanisms can be modeled independently with satisfactory accuracy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
J. D. Robson, M. J. Lawson, J. M. Donoghue, J. Guo, A. E. Davis
Summary: Discontinuous precipitation (DP) is a common mechanism for solid solution decomposition, resulting in the formation of precipitate layers and solute depleted matrix along a moving boundary. The morphology of DP regions is highly complex, and the behavior of dislocations and twins within such structures during deformation is not well understood. A 3-dimensional (3D) analysis is necessary to reveal the true morphology of DP. This study presents the first 3D investigation of DP using a novel PFIB based serial sectioning method. The AZ80 alloy studied exhibits an interconnected network of DP regions within a connected matrix, with varying widths of DP regions.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Soung Yeoul Ahn, Jongun Moon, Yeon Taek Choi, Eun Seong Kim, Sang Guk Jeong, Jeong Min Park, Mungu Kang, Hyomoon Joo, Hyoung Seop Kim
Summary: The microstructure and mechanical properties of AlSi10Mg alloy fabricated by selective laser melting were investigated in this study. Substantial hardening was achieved by aging heat treatment. The alloy shows excellent combination of strength and ductility, attributed to its fine cellular structure and nanoscale needle-like precipitates.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Zhirou Zhang, Qinghuan Huo, Yuxiu Zhang, Zhenyu Xiao, Aki Hashimoto, Xuyue Yang
Summary: The study investigated the effects of artificial aging on the tensile creep resistance of a hot-rolled Mg-3.5 wt%Nd alloy. It found that the type of precipitates and solute depletion in grain boundaries changed with aging duration, leading to grain boundary migration and PFZ widening, which decreased creep resistance. The sample with narrow PFZs and dislocations cutting beta' phases showed the best creep resistance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Rathinavelu Sokkalingam, Zhao Chao, Katakam Sivaprasad, Veerappan Muthupandi, Jayamani Jayaraj, Parthiban Ramasamy, Juergen Eckert, Konda Gokuldoss Prashanth
Summary: CoCrFeMnNi high-entropy alloy/AISI 316L stainless steel bimetal was fabricated using SLM, showing enhanced hardness and tensile strength due to the composition and structure advantages. However, the presence of defects and higher susceptibility to pitting corrosion in CoCrFeMnNi-HEA make it more prone to corrosion attack in corrosive environments.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
H. Sepehri-Amin, Xin Tang, T. Ohkubo, K. Hono
Summary: Understanding the magnetization reversal processes of permanent magnets is essential for developing magnets with high coercivity. Recent studies have used magneto-optical Kerr effect microscopy to observe the dynamic magnetic domains under an external magnetic field. Different microstructural features, such as grain boundaries and interfaces, influence the magnetization reversal processes of Nd-Fe-B-based permanent magnets. By manipulating these factors, it is possible to achieve magnets with higher coercivity.
Article
Chemistry, Physical
Jing Zhang, Kook Noh Yoon, Min Seok Kim, Hea Sang Ahn, Ji Young Kim, Zehao Li, Taisuke Sasaki, Kazuhiro Hono, Eun Soo Park
Summary: This study systematically investigates the microstructure evolution and mechanical property change of CoCrFeMnNi high-entropy alloys (HEAs) with varied nitrogen contents as an interstitial alloying element. The results show that increasing nitrogen contents can improve the yield strength and ultimate tensile strength of the alloy without significant reduction of ductility, exceeding those of Cantor HEA by nearly a factor of two.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
G. Lambard, T. T. Sasaki, K. Sodeyama, T. Ohkubo, K. Hono
Summary: The paper presents an active learning pipeline assisted by machine learning and Bayesian optimization for optimizing the process of permanent magnet to achieve high coercivity and remanence.
SCRIPTA MATERIALIA
(2022)
Article
Multidisciplinary Sciences
Xin Tang, H. Sepehri-Amin, N. Terada, A. Martin-Cid, I Kurniawan, S. Kobayashi, Y. Kotani, H. Takeya, J. Lai, Y. Matsushita, T. Ohkubo, Y. Miura, T. Nakamura, K. Hono
Summary: The authors demonstrate a series of materials with a large and reversible magnetocaloric effect, suitable for the full temperature range required for hydrogen liquefaction. By eliminating the magneto-structural phase transition, the giant magnetocaloric effect becomes reversible.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Kazuho Okada, Akinobu Shibata, Taisuke Sasaki, Hisashi Matsumiya, Kazuhiro Hono, Nobuhiro Tsuji
Summary: This study aimed to improve the resistance against hydrogen embrittlement by increasing the concentration of carbon segregated at prior austenite grain boundary (PAGB), XPAGB, in low-carbon martensitic steels. The specimens with and without carbon segregation treatment (Non-seg and Seg specimens, respectively) had similar microstructures, except for higher XPAGB in the Seg specimen. The Seg specimen exhibited higher maximum stress and smaller fraction of intergranular fracture surface under hydrogen-charged conditions, indicating that segregated carbon suppressed hydrogen accumulation and increased cohesive energy of PAGB.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Makoto Takeuchi, Motohiro Suzuki, Shintaro Kobayashi, Yoshinori Kotani, Tetsuya Nakamura, Nobuaki Kikuchi, Anton Bolyachkin, Hossein Sepehri-Amin, Tadakatsu Ohkubo, Kazuhiro Hono, Yasuhiro Une, Satoshi Okamoto
Summary: In this study, three-dimensional magnetic microscopy and electron microscopy techniques were used to investigate the magnetic domain structure of a high-coercivity Nd-Fe-B permanent magnet. The study revealed differences in magnetic domain structures between different magnetization states, but with the same periodicity. Unexpected magnetic domain behaviors were also observed.
NPG ASIA MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Varun Kumar Kushwaha, Yuya Sakuraba, Tomoya Nakatani, Taisuke Sasaki, Ivan Kurniawan, Yoshio Miura, Hiroo Tajiri, Kazuhiro Hono
Summary: The structural ordering of Co(2)MnZ (Z = Ge, Sn) Heusler alloys was studied, and it was found that even in the as-deposited state or by low-temperature annealing, L2(1)-ordering could be observed. Co2MnGe alloy exhibited a higher degree of L2(1)-ordering at 300 degrees C, making it a promising ferromagnetic electrode for spintronic device applications.
Article
Microscopy
Sujin Lee, Atsuko Sato, Takehiro Tamaoka, Kunio Yubuta, Mitsunari Auchi, Taisuke Sasaki, Tadakatsu Ohkubo, Kazuhiro Hono, Yasukazu Murakami
Summary: This paper proposes a method using electron holography to provide a phase image of the demagnetization field (H-d) within a thin-foil permanent magnet. The observation of H-d remains challenging because electron holography can only image the magnetic flux density (B), which is a combination of contributions from magnetization (M), stray magnetic field (H-s) outside the specimen, and H-d inside the specimen. The phase map approximating H-d, determined from electron holography observation of a Nd2Fe14B single-crystalline specimen, shows good agreement with micromagnetic theory's prediction. This method can be applied to study the coercivity mechanism of permanent magnets, which is sensitive to the demagnetization field.
Article
Materials Science, Multidisciplinary
Z. Wang, T. T. Sasaki, Y. Une, T. Ohkubo, K. Hono
Summary: Record-breaking high coercivity is achieved in Dy-free sintered magnets by separately diffusing Dy70Cu30 and Pr68Cu32 eutectic alloys. The low Dy content sample exhibits a high coercivity of 2.8 T and an excellent temperature coefficient of coercivity. The unique presence of a uniform Dy-rich shell and enriched Pr near the surface of Nd2Fe14B grains strengthens the anisotropy field, resulting in the high coercivity without alloying Dy to the initial magnet.
Article
Chemistry, Physical
Z. H. Kautsar, H. Sepehri-Amin, Xin Tang, R. Iguchi, K. Uchida, T. Ohkubo, K. Hono
Summary: The resistivities of anisotropic Nd-Fe-B-based magnets were increased in parallel and perpendicular directions to the c-axis by hot-deforming Nd-Fe-B melt-spun flakes coated with DyF3 through electrophoretic deposition. As a result, the operating temperature under high-frequency AC magnetic field decreased by 20°C due to the reduction of eddy current loss. The formation of a resistive layer composed of NdF3 at the interface of original ribbons in the hot-deformed magnet was observed. The excess Dy diffused into the original ribbon flakes and formed a Dy-rich shell in Nd2Fe14B grains, resulting in a high coercivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Microscopy
Jun Uzuhashi, Tadakatsu Ohkubo, Kazuhiro Hono
Summary: Atom probe tomography (APT) is a widely used technique for analyzing the microstructure of alloys and devices. In this study, a method for automatically fabricating the desired tip shape using a script-controlled FIB-SEM system was developed. The effect of intentionally changing the tip shape on APT data was also discussed.
Article
Chemistry, Physical
H. S. Maurya, J. Jayaraj, Z. Wang, K. Juhani, F. Sergejev, K. G. Prashanth
Summary: This study investigates the tribological behavior of TiC-430 L SS cermets fabricated by laser powder bed fusion/selective laser melting. The wear mechanism of the binder and matrix phase was studied using Rockwell indenter and scratch tests. It was found that the scratch hardness increases with increasing load, but decreases with increasing number of passes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
T. T. Sasaki, H. Sepehri-Amin, J. Uzuhashi, T. Ohkubo, K. Hono
Summary: This article highlights the importance of atom probe tomography (APT) in material analysis. Complementary or correlative (S)TEM/APT analysis provides detailed information on the structure and element distribution of materials, helping to understand the underlying mechanisms contributing to the development of excellent properties.
Article
Materials Science, Multidisciplinary
Jiangnan Li, Hossein Sepehri-Amin, Tadakatsu Ohkubo, Kazuhiro Hono
Summary: We have completed the analytical framework for determining the angular dependence of coercivity in exchange-coupled phases with sharp interfaces. A phase diagram was used to illustrate the two types of angular dependence, with or without a local minimum, for different thicknesses of the soft phase in a hard matrix. The presence or absence of a local minimum was confirmed to indicate whether the switching was dominated by spin rotation or by domain wall depinning. The mechanism could transform from the former to the latter if the coupling ratio between the soft and hard phases increased. These findings explain the transformation of angular dependence curves in Nd-Fe-B-based permanent magnets.
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)
