Article
Nanoscience & Nanotechnology
Yunhe Zheng, Laure Bourgeois, Jian-Feng Nie
Summary: This study investigated the structure of precipitates in Mg-Zn-Al alloys, revealing new structural features and proposing that the rod-shaped precipitates can be described by tiling of different shapes.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Shuhui Lv, Qiang Yang, Xiaoling Lv, Fanzhi Meng, Xin Qiu
Summary: Intermetallic phases in Mg-8Zn-6Al-1Sm alloys in both as-cast and peak-aged conditions were investigated. The study identified various intermetallic phases, such as Mg44Al15Zn41, Mg5Zn2Al2, Mg-32(Al,Zn)(49), and Al2Sm. Aging treatment showed a possible phase transformation and revealed precipitate constituents, including i phase, MgZnAl cubic phase, MgZn2 phase, Mg4Zn7 phase, and aperiodic structures. The study also found multiple orientation relationships between precipitates and the Mg matrix, and observed ordering planar faults in MgZn2 precipitates. The calculations demonstrated the superior strengthening effect of Mg-Zn-Al precipitates and attributed the high strength of the alloy to semi-continuous intermetallic skeletons and Mg-Zn-Al precipitates.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Fanzhi Meng, Shuhui Lv, Qiang Yang, Xin Qiu, Zixiang Yan, Qian Duan, Jian Meng
Summary: This study investigated the components and crystal structures of intermetallic phases in a gravity die-cast Mg-6.0Zn-1.5Nd-0.5Zr alloy using transmission electron microscopy. The results revealed multiple intermetallic phases and various internal faults in the alloy. The study also revealed new orientation relationships between different intermetallic phases.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Alok Singh, Takanobu Hiroto, Machiko Ode, Hiroyuki Takakura, Karel Tesar, Hidetoshi Somekawa, Toru Hara
Summary: The precipitation of a stable quasicrystalline i-phase has been observed in a Mg-6Zn-3Al magnesium alloy, which may be the first discovery of a stable i-phase in this alloy. The dissolution of i-phase at grain boundaries leads to precipitation in the Mg-matrix during cooling. Nucleation characteristics, phase transformation, and interface morphology were investigated.
Article
Nanoscience & Nanotechnology
Yuxiu Zhang, Dongliang Chen, Hiromi Nagaumi, Xuyue Yang
Summary: In this study, conventional forging was used to significantly improve the creep resistance of a Mg-0.9Mn-0.5Ce alloy, resulting in a mixed microstructure with both coarse and fine grains. The improved creep resistance was mainly attributed to the introduction of strong dislocation entanglements, tough twin boundaries, and precipitates, as well as the decreased mobility of dislocations and grain boundaries due to dynamically precipitated Mg12Ce precipitates and Ce element segregation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Shipeng Shu, Anthony De Luca, David C. Dunand, David N. Seidman
Summary: Micro-additions of 0.25 at.% Mn and/or 0.10 at.% Mo to dilute Al-0.08Zr-0.014Sc-0.008Er-0.09Si alloys affect precipitate evolution and resulting strengths, providing solid-solution strengthening and improving ambient-temperature strength and elevated-temperature creep resistance. Mn-modified precipitates exhibit higher number density, while Mo-modified precipitates display improved coarsening-resistance. Both Mn and Mo additions enhance creep resistance at 300 degrees C, with Mn-bearing alloys showing a more significant effect.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Kumar Sourabh, J. B. Singh, K. V. Ravikanth, A. Verma
Summary: This study reports the internal nitridation of alloy 690 during creep deformation at 1100°C. Creep tests at various stresses showed normal creep response at higher stresses and oscillatory creep at lower stresses. Nitride precipitates were observed near cracks, caused by the internal nitridation of freshly exposed crack surfaces. Precipitation of nitride particles had little effect on creep life of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
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
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
Nanoscience & Nanotechnology
Lunchao Zhang, Yuan Yuan, Jun Wang, Tao Chen, Jingfeng Wang, Fusheng Pan
Summary: High temperature heat treatment Mg-0.69Sn-0.69Y alloy exhibited a high damping capacity (0.201 at epsilon=1 x 10-3) and a very low critical strain amplitude at room temperature (epsilon cr1=2.97 x 10-5), which can be ascribed to the combined effects of purified matrix phase and subgrain interfaces. The substructure is unstable and the damping capacity decreases with temperature increment.
SCRIPTA MATERIALIA
(2023)
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
Yuxiu Zhang, Zhirou Zhang, Qinghuan Huo, Chunyu Wang, Jinlong Yang, Xuyue Yang
Summary: This study investigated the creep behaviors of Mg-Y alloys with high Y concentration, revealing the creep mechanisms of as-solution and as-aged samples at different temperatures. It also explored the influences of static precipitation and precipitate-free zones on the creep resistance.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Baoxu Huang, Lili Wu, Changzheng Wang, Jie Ma, Xingchuan Zhao
Summary: The study prepared a Cu-0.67Cr-0.3Zr alloy using vacuum directional solidification equipment, and characterized the microstructure of Cr precipitates in the Cu matrix by microscopy. The findings showed the presence of two different types of precipitates, namely FCC and BCC, in the Cu matrix. After aging treatment, the spherical precipitates played a major role in improving the strength of the alloy.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Katarzyna Stan-Glowinska, Amelia Zieba, Lukasz Rogal
Summary: This study investigates the microstructures and mechanical properties of two conventionally cast Al-Mg-Zn base alloys during aging process. The results show that the Ga-bearing alloy exhibits higher hardness and tensile strength, which can be attributed to its higher precipitate number density. In addition, the structure of formed precipitates differs between the two alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Cheng Liu, Xiaohua Yang, Jianchao Peng, Bin Liu, Qun Luo, Qian Li, Kuo-Chih Chou
Summary: The deformation behaviors of a dual-phase Mg alloy containing α-Mg and 18R-LPSO phases were investigated in this study. The 18R phase, accounting for 11.3 vol.%, contributed to 23.0% of the overall alloy deformation. The coordinated twinning deformation of α-Mg matrix through the slip of basal dislocations and the kinking deformation of Mg slices induced by the 18R phase were observed during the early stage of deformation. At the end of deformation, a large number of T2-type stacking faults were generated, improving the ductility of the alloy. This work provides a novel strategy for designing high-strength and good ductility dual-phase Mg alloys.
SCRIPTA MATERIALIA
(2023)
Article
Engineering, Electrical & Electronic
M. Celikin, M. Maalekian, M. Pekguleryuz
JOURNAL OF ELECTRONIC MATERIALS
(2018)
Article
Construction & Building Technology
Zaid Ghouleh, Mert Celikin, Roderick I. L. Guthrie, Yixin Shao
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2018)
Article
Nanoscience & Nanotechnology
M. Celikin, R. Gauvin, M. Pekguleryuz
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2018)
Article
Optics
Joyprokash Chakrabartty, Catalin Harnagea, Mert Celikin, Federico Rosei, Riad Nechache
Article
Materials Science, Multidisciplinary
P. Guglielmi, A. Arslan Kaya, Y. Ture, A. Ataman, E. Arkin, D. Sorgente, G. Palumbo
Article
Engineering, Electrical & Electronic
M. Celikin, M. Maalekian, M. Pekguleryuz
JOURNAL OF ELECTRONIC MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
F. R. Kaschel, R. K. Vijayaraghavan, A. Shmeliov, E. K. McCarthy, M. Canavan, P. J. McNally, D. P. Dowling, V Nicolosi, M. Celikin
Article
Engineering, Industrial
F. R. Kaschel, M. Celikin, D. P. Dowling
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2020)
Article
Automation & Control Systems
Sebastiano Piazza, Brian Merrigan, Denis P. Dowling, Mert Celikin
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2020)
Review
Materials Science, Multidisciplinary
A. Arslan Kaya
FRONTIERS IN MATERIALS
(2020)
Article
Chemistry, Analytical
Favour Okosun, Mert Celikin, Vikram Pakrashi
Article
Metallurgy & Metallurgical Engineering
Yangyang Guo, Gaofeng Quan, Mert Celikin, Lingbao Ren, Yuhang Zhan, Lingling Fan, Houhong Pan
Summary: This study investigates the effect of post-deposition heat treatment on the microstructure and mechanical properties of WAAM AZ80M magnesium alloy. The results show that T4 treatment improves the microsegregation of alloying elements, T5 treatment preserves the distribution of secondary phases, and T6 treatment re-precipitates tiny beta-phases. T4 and T6 treatments result in a more uniform hardness distribution, and T6 treatment improves strength and ductility.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Chemistry, Multidisciplinary
Graham King, Mert Celikin, Mario Alberto Gomez, Levente Becze, Valeri Petkov, Giancarlo Della Ventura
ENVIRONMENTAL SCIENCE-NANO
(2020)
Proceedings Paper
Materials Science, Multidisciplinary
Donato Sorgente, Gianfranco Palumbo, Alessandro Fortunato, Alessandro Ascari, Ali Arslan Kaya
THERMEC 2018: 10TH INTERNATIONAL CONFERENCE ON PROCESSING AND MANUFACTURING OF ADVANCED MATERIALS
(2018)
Proceedings Paper
Physics, Applied
P. Guglielmi, A. Arslan Kaya, D. Sorgente, G. Palumbo
PROCEEDINGS OF 21ST INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING (ESAFORM 2018)
(2018)
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)