Article
Nanoscience & Nanotechnology
Jin-Sung Hong, Young-Kook Lee
Summary: The mechanism of dislocation multiplication during thermally-induced gamma austenite <-> e martensite transformation in the Fe-17Mn alloy was investigated using an in-situ transmission electron microscope. Dislocations were introduced in gamma at grain boundaries and inside the grains during thermally - induced gamma <-> e transformations. These dislocations played different roles, including constituting e martensite and returning to grain boundaries during e -> gamma reverse transformation, as well as being introduced by plastic deformation during gamma <-> e transformations.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Jayshri Dumbre, Shravan K. Kairy, Elaf Anber, Timothy Langan, Mitra L. Taheri, Thomas Dorin, Nick Birbilis
Summary: Scandium (Sc) containing Al-Si model alloys were heat-treated to form (Al,Si)(3)Sc phase at 350 degrees C and V-phase (AlSc2Si2) at above 450 degrees C. The hardening of the alloys was attributed to the coherent nanoscale (Al,Si)(3)Sc precipitates, while significant softening was observed due to the formation of coarse V-phase. The V-phase was found to have a rod morphology and six new orientation relationships with the alpha-Al matrix were determined using TEM.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Neng-Hao Gan, Yi-Hsuan Sun, Tzu-Ching Tsao, Chia-Lin Li, Jia-Heng Liu, Hung-Wei Yen, Chun-Hway Hsueh, Jer-Ren Yang, Shing-Hoa Wang, Jien-Wei Yeh, Horng-Yi Chang, Wen-Hsing Hou
Summary: The presence of Cu-rich nanoparticles in the delta phase of Cu-containing alloys at high temperature was unexpectedly observed. Thermodynamic calculations showed that the solubilities of Cu in the gamma and delta phases at 1295 degrees C were 3.52 and 1.99 wt%, respectively. Quenching from 1295 to 25 degrees C resulted in the ultra-supersaturation of Cu in the delta phase, leading to the precipitation of Cu-rich nanoparticles.
SCRIPTA MATERIALIA
(2022)
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
M. R. Gazizov, A. O. Boev, C. D. Marioara, R. Holmestad, M. Yu Gazizova, R. O. Kaibyshev
Summary: The study analyzed the coherent edge interface structures of thin {111}(Al) Omega plates in a peak-aged Al-Cu-Mg-Ag alloy using atomic-resolution STEM, finding that these edge interfaces can tilt from their orthogonal orientations to the broad plate surfaces. The edge interface tilts are correlated with shear component orientations along the broad plate surfaces and vary with plate thicknesses, while Cu atoms tend to occupy specific atomic sites near the edge interfaces in the Al matrix region.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Kaixuan Li, Yuanlin Zhuang, Ligong Zhao, Dongshan Zhao, He Zheng, Shuangfeng Jia, Ying Zhang, Peili Zhao, Jianian Gui, Jianbo Wang
Summary: The study investigated the interaction between deformation twinning and long period stacking ordered (LPSO) structures in an Mg-based alloy, showing the hindrance of LPSO structures and stacking faults to twinning. The in-situ experiments revealed that thick LPSO plates effectively retard the twinning propagation, and the closer spacing between LPSO structures further suppresses twin propagation. Additionally, the study discussed the resistance of stacking faults to twinning at the atomic scale, and the strengthening effect of LPSO structures on suppressing twinning growth.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Yong Zhang, Pengfei Wu, Yu Lu, Xun Cao, Yizhong Huang, Vincent Gill, Zhiming Li
Summary: The atomic-scale structures of Z-plates in a Zr-alloyed Sm2Co17-type magnet were investigated using aberration-corrected STEM. Zr preferentially replaces dumbbell Sm to form (Sm1/3Zr2/3)Co3 Z-plates, which contribute to the enhancement of magnet performance. Different stacking types of Z-plates were observed, some of which exceed the thickness of double 2/3-stacking and degrade the oxidation resistance of the magnet. The diffusion-controlled mechanisms for the phase transformation from the 2:17R matrix to the 1:3R Z-plates were unraveled.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Felicity F. Dear, Paraskevas Kontis, Baptiste Gault, Jan Ilavsky, David Rugg, David Dye
Summary: The nucleation and growth of Ti3Al alpha(2) ordered domains in alpha-Ti-Al-X alloys were characterized using various techniques, showing that the addition of solutes such as Mo can increase nucleation density and decrease precipitate size and coarsening rate. The study also found that solutionizing temperature affects nucleation number density, supporting the hypothesis that vacancy concentration affects alpha(2) nucleation. Observation that all solutes increase nucleation number density is consistent with a vacancy-controlled nucleation mechanism.
Article
Nanoscience & Nanotechnology
Frank Niessen, Azdiar A. Gazder, David R. G. Mitchell, Elena V. Pereloma
Summary: Microstructure evolution during the 3-point bending of a metastable beta Ti-10V-2Fe-3Al alloy containing 5% alpha was dominated by the formation of deformation-induced alpha '' martensite. The nucleation of alpha '' plates from {580}(alpha '') habit planes at alpha-beta interfaces, impingement with high-angle boundaries, and subsequent thickening led to a build-up of strain energy inducing {130} < 310 >(alpha '') twinning. The study also revealed the activation of {130}< 310 >(alpha '') twinning by alpha '' impingement in a metastable beta matrix.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
M. R. Gazizov, A. O. Boev, C. D. Marioara, R. Holmestad, D. A. Aksyonov, M. Yu Gazizova, R. O. Kaibyshev
Summary: The atomic structure of omega plates forming on {111}Al planes in an Al-Cu-Mg-Ag alloy has been investigated, revealing volumetric and structural incompatibilities with the Al matrix. Different thicknesses of omega plates were studied under peak-aged conditions, showing shear components and misfit strains affecting plate interfaces and the thickening of omega precipitates.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Hung-Chih Liu, Chia-Ming Kuo, Pai-Keng Shen, Cheng-Yao Huang, Hung-Wei Yen, Che-Wei Tsai
Summary: Novel high-entropy alloys in Al-Co-Cr-Fe-Ni-Ti system have been studied, showing superior mechanical properties at cryogenic temperatures compared to room temperature. The formation of multiple-layered stacking faults after tensile test at 77 K increases both the yield strength and ultimate tensile strength, while disordering of gamma ' precipitates decreases the formation barrier of mechanical twinning and improves ductility at 77 K.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Priyanka Agrawal, Sanya Gupta, Shivakant Shukla, Saurabh S. Nene, Saket Thapliyal, Michael P. Toll, Rajiv S. Mishra
Summary: This research focuses on tailoring the metastability of transformation induced plasticity high entropy alloys (TRIP HEAs) through alloying and processing to improve their mechanical properties. The addition of Cu enhances the ductility and stacking fault energy of the alloy, resulting in improved strength and work hardening. Furthermore, friction stir processing (FSP) is employed to refine the microstructure and enhance the TRIP effect, leading to advanced properties compared to the original as-cast alloy.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Aditya Kamath, Fei Long, Segun Aiyeru, Malcolm Griffiths, Artur Tamm, Mark R. Daymond, Laurent Karim Beland
Summary: Zirconium alloys, specifically Zr-2.5Nb, are widely used in nuclear energy applications as pressure tube material in reactors. By analyzing the crystal structure of Zr((Zr,) Nb,Fe)2 NPs using TEM, DFT calculations, and FEA, we uncover a mixed c14 and c15 Laves phase structure within the NPs and provide an explanation through the syncroshear mechanism. Through thermodynamic analysis, we evaluate the contributions to the free energy of the NPs and find that the c15 structure is energetically favored at lower temperatures, while the c14 structure prevails at higher temperatures. Additionally, our study reveals that the NP/a-Zr interface is likely to be incoherent due to significant stresses involved.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
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
Materials Science, Multidisciplinary
Bailing An, Yan Xin, Rongmei Niu, Zhaolong Xiang, Yifeng Su, Jun Lu, Engang Wang, Ke Han
Summary: We studied the early nucleation of Ag precipitates on dislocations within Cu grains in a Cu-6 wt%Ag-0.15 wt%Sc alloy. The formation of planar defects released misfit strain on Cu/Ag interfaces, enhancing subsequent nucleation and growth of Ag precipitates.
MATERIALS CHARACTERIZATION
(2022)
Article
Biochemistry & Molecular Biology
Dong Zhu, Jinkai Li, Xiangyang Guo, Qinggang Li, Hao Wu, Lei Meng, Zongming Liu
Article
Materials Science, Multidisciplinary
Hao Wu, Jinfeng Leng, Xinying Teng, Tao Su, Qinggang Li, Jinkai Li, Junyan Wu, Daokui Xu, Yongchang Zhu
MATERIALS & DESIGN
(2019)
Article
Chemistry, Physical
Gui Lou, Shumin Xu, Xinying Teng, Zhijian Ye, Peng Jia, Hao Wu, Jinfeng Leng, Min Zuo
Article
Chemistry, Physical
Hao Wu, Shihao Zhang, Haibo Hu, Jinkai Li, Junyan Wu, Qinggang Li, Zhi Wang
Article
Materials Science, Multidisciplinary
Hao Wu, Zhuangzhuang Liu, Haibo Hu, Qinggang Li, Jinkai Li, Junyan Wu, Zhi Wang
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2019)
Article
Nanoscience & Nanotechnology
Hao Wu, Meng Huang, Qinggang Li, Junyan Wu, Jinkai Li, Zhi Wang, Guohua Fan
SCRIPTA MATERIALIA
(2019)
Article
Materials Science, Multidisciplinary
Zhuangzhuang Liu, Wei Wei, Kun Xu, Hao Wu, Tao Su, Yongchang Zhu, Zhi Wang
MATERIALS RESEARCH EXPRESS
(2019)
Article
Materials Science, Multidisciplinary
Hao Wu, Kun Xu, Qinggang Li, Junyan Wu, Zhi Wang
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2020)
Review
Materials Science, Multidisciplinary
Hao Wu, Guohua Fan
PROGRESS IN MATERIALS SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Hao Wu, Yunlei Xu, Zhihao Wang, Zhenhua Liu, Qinggang Li, Jinkai Li, Junyan Wu
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2020)
Article
Nanoscience & Nanotechnology
Zhuangzhuang Liu, Anqi Xia, Qinggang Li, Junyan Wu, Hao Wu, Jian Zhou, Guohua Fan, Zhi Wang
Summary: Dual-heterogeneous titanium-based composites were designed to enhance the strength-ductility synergy by utilizing compositional gradient and multi-layered hetero-structures. The study evaluated the effects of heterogeneous degree and deformation temperatures on mechanical properties, and elucidated the underlying mechanism through the disorder-to-order transition of dislocation configurations with temperature dependency.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Mechanical
Hao Wu, Meng Huang, Xuewen Li, Yiping Xia, Zhi Wang, Guohua Fan
Summary: The study proposed a new heterogeneous laminated/gradient integrated strategy to improve material performance. Results demonstrated that the stress-bearing constituents gradually transition from Ti(Al) to TiBw/Ti layers as the temperature decreases, leading to temperature-dependent reversed fracture behavior.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Chemistry, Physical
Hao Wang, Haoyi Niu, Hao Wu, Rengeng Li, Guohua Fan
Summary: This study investigates the plastic deformation behavior of the ring-rolled GH4169 alloy at the micro level through in situ tensile tests. The results show that the fraction of low-angle grain boundaries increases gradually during tensile deformation, and the misorientation evolution within the grain interior is severely inhomogeneous. Most of the slip system activation coincides with the Schmid law.
Review
Instruments & Instrumentation
Chao Xu, Meng Huang, Hao Wu, Kesong Miao, Guangze Tang, Honglan Xie, Tiqiao Xiao, Huijun Kang, Tongmin Wang, Lin Geng, Guohua Fan
QUANTUM BEAM SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
Wen Wang, Zitang Zhang, Jiazheng Niu, Hao Wu, Sicheng Zhai, Yan Wang
MATERIALS TODAY COMMUNICATIONS
(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)
