Article
Materials Science, Multidisciplinary
Zhichun Zhou, Binbin Jiang, Jianke Qiu, Linglei Zhang, Jiafeng Lei, Rui Yang, Kui Du
Summary: This study investigates the mechanism of crack formation in titanium alloys with lamellar microstructure under low-cycle dwell fatigue. The accumulation of residual dislocations and local tensile stress at the α/β interfaces are found to be the key factors leading to the formation of dwell fatigue cracks.
SCIENCE CHINA-MATERIALS
(2023)
Article
Engineering, Mechanical
Rodrigo de Carvalho Paes Loureiro, Miloslav Beres, Mohammad Masoumi, Hamilton Ferreira Gomes de Abreu
Summary: The investigation into the environmental assisted cracking failure mechanism revealed the significant impact of pearlite morphology and crystallographic texture on crack nucleation and propagation. The presence of high angle grain boundaries was found to suppress crack propagation, while refined microstructure was effective in preventing crack growth. Control of crystallographic orientation was identified as a key factor in improving resistance to environmentally assisted cracking.
ENGINEERING FAILURE ANALYSIS
(2021)
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
Metallurgy & Metallurgical Engineering
Osamu Umezawa, Weibo Li
Summary: The generation of subsurface fatigue cracks in a groove-rolled and cold-swaged Ti-Fe-O alloy was studied, and the effects of crystallographic texture on crack initiation and growth were discussed. Microcracks were found in beta grains, alpha grains, and at the alpha-beta interface. The presence of {10 (1) over bar0}(alpha) fiber texture hindered the growth of microcracks along the basal plane, but assisted their growth along the prismatic plane or at a {10 (1) over bar0}(alpha) twist boundary. The combination of shear stress and opening stress on {10 (1) over bar0}(alpha) resulted in Mode II or III microcracks and caused crack growth on the prismatic plane in neighboring grains.
ISIJ INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Kai Zhang, Jun Jiang
Summary: Compression tests were conducted on Mg-3Al-1Zn alloy at room and cryogenic temperatures to study its low-temperature plasticity. The experiment found that the strain to failure and fracture strength of the alloy increased by 21.4% and 51.6% respectively at cryogenic temperature compared to room temperature. The study also discovered that at room temperature, {10 1 2} tension twins dominated, while at cryogenic temperature, there were abundant (10 (1) over bar 2)-(01 (1) over bar 2) twin-twin interactions. The presence of multiple slips, such as pyramidal and basal slips, in twin-twin interactions enhanced the strain to failure and flow stress at cryogenic temperature.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Multidisciplinary Sciences
Nick R. Lutjes, Silang Zhou, Jordi Antoja-Lleonart, Beatriz Noheda, Vaclav Ocelik
Summary: The study analyzes the spherulitic type of 2D crystal growth in thin amorphous Quartz films using electron back-scatter diffraction (EBSD), revealing the characteristics, growth mode, and possible mechanisms of spherulitic Quartz crystal colonies.
SCIENTIFIC REPORTS
(2021)
Article
Mechanics
Shu Huang, Jianjun Liu, Jie Sheng, Xiankai Meng, Xiaoqi Hu, Mingliang Zhu, Jinzhong Lu, Jianzhong Zhou
Summary: The effects of laser peening on the fatigue crack growth (FCG) characteristics of high-temperature IN718 Ni-based alloy were investigated. The results showed that laser peening could significantly enhance the FCG resistance by inducing compressive residual stress and altering the microstructure. Additionally, it was found that increasing the laser power density improved the high-temperature FCG resistance.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
Hakon W. Anes, Antonius T. J. van Helvoort, Knut Marthinsen
Summary: Correlated analysis of (sub)grains and particles in alloys is important for understanding transformation processes and controlling material properties. This paper presents a multimodal data fusion workflow that combines subgrain data from electron backscatter diffraction (EBSD) with particle data from backscatter electron (BSE) images in the scanning electron microscope. The workflow was demonstrated on a cold-rolled and recovered Al-Mn alloy and enables statistical analysis of subgrains surrounding constituent particles and dispersoids' location with respect to subgrain boundaries. The results show that the different types of subgrains experience varying degrees of drag from dispersoids, and subgrains at constituent particles have a growth advantage due to lower dislocation density and higher boundary misorientation angle.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Zhongwei Xu, An Liu, Xishu Wang
Summary: In this study, a series of fatigue tests were conducted on rolled Ti-6Al-4V alloys to investigate the influence of macrozones on fatigue cracking behavior and fracture mechanisms. It was found that different macrozones have varying effects on fatigue crack propagation and resistance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Yong-Jun Oh, Godwin Kwame Ahiale, Young-Bum Chun, Seungyon Cho, Yi-Hyun Park, Won-Doo Choi, Kizze-Hayford Ebo Anderson
Summary: The study revealed that the RAFM steel exhibits cyclic softening behavior during low-cycle fatigue tests, with the softening process divided into an initial rapid stage and a uniform softening stage, which is mainly influenced by the grain boundaries and crystal orientation of the grains.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Chunfei Li, Josiah Dubovi, Clay Klein
Summary: This article presents a method to determine facet orientation using SEM and EBSD, which is validated with facets on spherical particles of 20 μm in an Al60Cu25Fe15 alloy. The experimental results show that the surface of the facet is parallel to the {100} lattice plane of a cubic phase.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Haitao Zhao, Junheng Gao, Guilin Wu, Honghui Wu, Chaolei Zhang, Yuhe Huang, Shuize Wang, Xinping Mao
Summary: Variant pairing is a critical factor in determining the morphology and boundary characteristics of transformation products. The conventional quantification method based on deviation angles may produce biased results. This research proposes a new quantification method using variant indexing and validates it by comparing experimental results.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Esmaeil Damavandi, Salman Nourouzi, Sayed Mahmood Rabiee, Roohollah Jamaati, Jerzy A. Szpunar
Summary: The Bc route of ECAP method was successfully applied to analyze microstructure of Al-Si-Cu alloy. At least four passes of route -B-C are needed to achieve uniform distribution of fine IMCs and ESPs. PSN and CDRX are important mechanisms in refining the aluminum matrix in Al-Si-Cu alloy.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
M. C. Hawkins, S. Thomas, R. S. Hixson, J. Gigax, N. Li, C. Liu, J. A. Valdez, S. Fensin
Summary: The goal of this study was to assess the dynamic properties of a new class of materials, High entropy alloys (HEAs). Gas gun experiments coupled with recovery were conducted on a specific HEA, FeCrMnNi, to measure its equation of state (EOS) and spall strength. The results showed that the measured EOS for this material at one velocity was in reasonable agreement with an estimated Hugoniot. Furthermore, the spall strength of this material was found to be -1.9 GPa, with the main failure mode being brittle.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
X. Cui, S. Zhang, C. H. Zhang, J. Chen, J. B. Zhang, S. Y. Dong
Summary: By comparing the microstructural features of 24CrNiMo low alloy steel fabricated by SLM and LMD processes using advanced electron microscopy and electron backscatter diffraction techniques, significant differences in crystallographic orientations, grain boundaries, grain sizes, and dislocations distributions were observed. These differences can result in varied mechanical properties, providing important references for process selection in practical industrial applications.
Article
Mechanics
Ning Gao, Wei Li, Rui Sun, XinXin Xing, Ping Wang, Tatsuo Sakai
ENGINEERING FRACTURE MECHANICS
(2018)
Article
Nanoscience & Nanotechnology
Wei Li, Xinxin Xing, Ning Gao, Meng Li, Rui Sun, Siqi Zhou, Tatsuo Sakai
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Engineering, Mechanical
W. Li, R. Sun, N. Gao, P. Wang, T. Sakai
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2019)
Article
Engineering, Mechanical
Wei Li, Meng Li, Rui Sun, Xinxin Xing, Ping Wang, Tatsuo Sakai
INTERNATIONAL JOURNAL OF FATIGUE
(2020)
Article
Engineering, Mechanical
Wei Li, Rui Sun, Tianyi Hu, Xiaolong Li, Cheng Li, Yucheng Zhang, Xiaoming Ding, Ping Wang
Summary: Tests were conducted on a Ni-based superalloy manufactured by selective laser melting at temperatures of 25 ?C and 650 ?C, with stress ratios of -1 and 0.1, to investigate the impact of elevated temperature on fatigue properties. Elevated temperature greatly promoted interior fatigue failure with longer life, attributed to crystallographic facets associated with grain structure. Through electron backscattered diffraction and stress intensity factor evaluation, the mechanisms of interior failure were elucidated. The proposed microstructure-based crack nucleation life model showed good agreement between predicted and experimental results.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Mechanical
Xiaolong Li, Yucheng Zhang, Wei Li, Siqi Zhou, Rui Sun, Cheng Li, Ping Wang, Tatsuo Sakai
Summary: Asymmetric load tests were conducted on a nickel-based superalloy at 25 degrees C and 750 degrees C to investigate its high-cycle-fatigue and very-high-cycle-fatigue properties at elevated temperature. The longer life at 750 degrees C is attributed to internal failure with crystallographic facets. The competition between temperature and vacuum effects results in lower threshold values for crack sizes at elevated temperature. Predicted fatigue life using a proposed crack nucleation life model is within a factor of three compared to experimental data.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
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)
