Article
Chemistry, Physical
Xinbo Ni, Fangcheng Zheng, Xinying Teng, Kesong Miao, Rengeng Li, Chenglu Liu, Xuewen Li, Chang Zhou, Hao Wu, Guohua Fan
Summary: Layer thickness is a crucial parameter for determining the mechanical properties of multi-layered composites. Recent observations have shown that increasing the thickness of Ti layers in Ti/Al layered materials leads to synchronous improvement in strength and ductility. A combination of synchrotron X-ray microdiffraction and electron backscatter diffraction techniques was used to study the behavior of dislocations at different deformation stages. A mechanistic model was developed to explain the influence of layer thickness and determine the threshold thickness that governs the transition of deformation and fracture behaviors. The findings from our experimental and modeling efforts highlight the role of layer thickness in dislocation dynamics and strain distribution, providing insights for designing next-generation high-performance layered composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Ravi Raj Purohit Purushottam Raj Purohit, Samuel Tardif, Olivier Castelnau, Joel Eymery, Rene Guinebretiere, Odile Robach, Taylan Ors, Jean-Sebastien Micha
Summary: A feed-forward neural network model is presented to index diffraction spots recorded during synchrotron X-ray Laue microdiffraction experiments in real time. The model applies data dimensionality reduction to extract physical features from 2D X-ray diffraction Laue images, enabling on-the-fly training for any crystal system. The capabilities of the model are demonstrated with three examples, showcasing its ability to efficiently index Laue spots in simple and complex recorded images.
JOURNAL OF APPLIED CRYSTALLOGRAPHY
(2022)
Article
Computer Science, Artificial Intelligence
Johann Reinhard, Philipp Urban
Summary: The quality of ICC profiles depends on the accuracy of the printer model, the gamut mapping approach, and the smoothness and accuracy of the backwards LUTs. Optimizing the smoothness of the LUTs comes at the expense of color accuracy and requires gamut reduction. We propose a method to optimize existing ICC profiles' backwards LUTs for accuracy, smoothness, gamut exploitation, and mapping.
IEEE TRANSACTIONS ON IMAGE PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
N. B. Zhang, Y. Y. Zhang, S. Chen, B. B. Zhang, Z. L. Li, H. L. Xie, L. Lu, X. H. Yao, S. N. Luo
Summary: This study investigates the onset of detwinning in magnesium alloy Mg-3Al-1Zn under continuous loading using real-time in situ synchrotron X-ray diffraction. The results reveal that detwinning of the {10 (1) over bar2} extension twins occurs immediately upon unloading, regardless of whether the twins are activated by tension parallel to or compression perpendicular to the c-axis fibers.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Pei-Tzu Lee, Wan-Zhen Hsieh, Cheng-Yu Lee, Yu-Hsuan Huang, Ching-Yu Chiang, Ching-Shun Ku, C. R. Kao, Cheng-En Ho
Summary: The allotropic phase transformation of Cu6Sn5 from a hexagonal to monoclinic structure at 186 degrees C is studied using synchrotron white X-ray Laue diffraction method, which successfully distinguishes the η and η' structures and proposes a two-stage phase transformation kinetics.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
Pei-Tzu Lee, Wan-Zhen Hsieh, Cheng-Yu Lee, Shao-Chin Tseng, Mau-Tsu Tang, Ching-Yu Chiang, C. R. Kao, Cheng-En Ho
Summary: The study found a noticeable compressive deviatoric stress at the anode of Sn strips, particularly in the roots of Sn whiskers, confirming that electromigration-induced atomic accumulation occurred downstream in a strip and that Sn whiskering was closely related to internal stress resulting from atomic accumulation in confined segments.
SCRIPTA MATERIALIA
(2022)
Article
Geology
O. Vallcorba, M. Canillas, J. Audije-Gil, F. Barroso-Barcenilla, A. Gonzalez-Martin, J. Molera, M. A. Rodriguez, O. Cambra-Moo
Summary: Synchrotron radiation X-ray microdiffraction has been applied for the first time to analyze the growth and development of crocodilian teeth. Significant differences in hydroxyapatite crystallite sizes and texture were found between a fossil crocodylomorph and a modern crocodylian, suggesting different postdepositional processes and functional pressures during their lives. The crystalline texture in the tooth enamel seems to be influenced by teeth functionality and mechanical stress during crocodilian life.
CRETACEOUS RESEARCH
(2021)
Article
Nuclear Science & Technology
Shuai-Peng Yue, Liang Zhou, Yi-Ming Yang, Hong Shi, Bin Ji, Ming Li, Peng Liu, Ru-Yu Yan, Jing-Tao Zhu, Guang-Cai Chang
Summary: In this study, a multilayer structure consisting of WSi2/Si thin films was successfully prepared for the fabrication of a multilayer Laue lens (MLL) capable of focusing hard X-rays to the nanometer scale. The growth rate of the thin films was calibrated to improve the performance of the optical element.
NUCLEAR SCIENCE AND TECHNIQUES
(2022)
Article
Materials Science, Multidisciplinary
Chenyu Ren, Li Jiang, Jiawei Kou, Shuai Yan, Li Li, Mengting Liu, Xiaohao Dong, Kai Chen, Zhongliang Li, Zhijun Li, Xiaoxu Huang, Renzhong Tai
Summary: The micro-Laue technique based on synchrotron radiation has great application potential in materials science research for crystal orientation and lattice strain/stress resolution. The updated progress in the development of the micro-Laue technique at the Shanghai Synchrotron Radiation Facility provides important tools for material studies.
SCIENCE CHINA-MATERIALS
(2021)
Article
Physics, Multidisciplinary
D. Dzhigaev, Z. Zhang, L. A. B. Marcal, S. Sala, A. Bjorling, A. Mikkelsen, J. Wallentin
Summary: The study investigated twinned ferroelastic domains in single 500 nm CsPbBr3 particles using 3D Bragg coherent X-ray diffraction imaging, unveiling a preferential double-domain structure and suggesting the possibility of a deterministic formation process. The results provide valuable insights for both improving the performance of perovskite-based devices and understanding ferroelastic nanoscale materials, paving the way for real-time imaging of domain dynamics in ferroic systems.
NEW JOURNAL OF PHYSICS
(2021)
Article
Engineering, Mechanical
Y. Z. Li, Z. Y. Liang, M. X. Huang
Summary: This study investigates the effect of warm rolling on the deformation mechanisms of TWIP steel. It is found that while dislocation multiplication always controls the maximum flow stress, deformation twinning becomes increasingly important for steels with larger warm rolling reductions. The twinning kinetics is enhanced by the high dislocation densities caused by warm rolling, leading to an enhancement of twinning-induced hardening.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Jun Wang, Mahmoud Reza Ghandehari Ferdowsi, Sitarama R. Kada, Peter A. Lynch, Zhiyang Wang, Justin A. Kimpton, Matthew R. Barnett
Summary: The study investigates the impact of aging on cyclic loading-unloading responses of extruded Mg-Zn alloys, revealing that aging has complex effects on twinning and slip behavior. Aged samples promote twinning over slip during loading and experience additional 'forward' twinning upon unloading. Furthermore, aging leads to noticeable ratchetting strain compared to non-aged samples.
Article
Physics, Multidisciplinary
Zhao Chang-Zhe, Si Shang-Yu, Zhang Hai-Peng, Xue Lian, Li Zhong-Liang, Xiao Ti-Qiao
Summary: In this paper, the beam splitting characteristics of Laue crystal are analyzed based on X-ray diffraction dynamics, and the influences of crystal absorption and incident light angular divergence on transmission and diffraction are simulated. The results show that the kinematical theory of X-ray diffraction is not sufficient to analyze the beam splitting characteristics of the crystal. The interaction between wave fields in the crystal and the Pendell.sung effect in the dynamical theory of X-ray diffraction need to be considered to explain the change of the crystal beam-splitting ratio quantitatively.
ACTA PHYSICA SINICA
(2022)
Article
Engineering, Electrical & Electronic
Junwei Zeng, Nuo Xu, Cheng Li, Desheng Ma, Chenglong Huang, Wenqing Wang, Yihong Hu, Liang Fang
Summary: A new interconnected LUT structure based on MESO device is proposed in this study, showing promising prospects in future low power applications due to its property of representing information by current direction. Compared to other LUT designs, the number of auxiliary transistors in this structure is significantly reduced.
MICROELECTRONICS JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Bolun Han, Chengcheng Zhang, Kai Feng, Zhuguo Li, Xiancheng Zhang, Yao Shen, Xiaodong Wang, Hiroyuki Kokawa, Ruifeng Li, Zhiyuan Wang, Paul K. Chu
Summary: The study fabricated a near full-dense hierarchical CrCoNi medium entropy alloy (MEA) using selective laser melting (SLM), achieving superior yield strength at 77K. The high strength of the material stems from a hierarchical microstructure composed of high-density dislocations and low-angle grain boundaries (LAGB). The results suggest that SLM is a viable technique for fabricating dense hierarchical CrCoNi MEA and offer a design strategy to further improve mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Multidisciplinary Sciences
Jiawei Xue, Anfeng Zhang, Yao Li, Dan Qian, Jingchun Wan, Baolu Qi, Nobumichi Tamura, Zhongxiao Song, Kai Chen
SCIENTIFIC REPORTS
(2015)
Article
Chemistry, Multidisciplinary
Ming-Shuai Ding, Jun-Ping Du, Liang Wan, Shigenobu Ogata, Lin Tian, Evan Ma, Wei-Zhong Han, Ju Li, Zhi-Wei Shan
Article
Multidisciplinary Sciences
Hao Shen, Wenxin Zhu, Yao Li, Nobumichi Tamura, Kai Chen
SCIENTIFIC REPORTS
(2016)
Article
Chemistry, Physical
Sihai Luo, Weifeng He, Kai Chen, Xiangfan Nie, Liucheng Zhou, Yiming Li
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Nanoscience & Nanotechnology
Jiawei Kou, Kai Chen, Nobumichi Tamura
SCRIPTA MATERIALIA
(2018)
Article
Materials Science, Multidisciplinary
Yao Li, Kai Chen, Nobumichi Tamura
MATERIALS & DESIGN
(2018)
Article
Chemistry, Physical
Cheng Wang, Qiuliang Li, Xin Zhou, Wenxin Zhu, Runqiu Huang, Zhihao Pan, Kai Chen, Chang He
Article
Chemistry, Multidisciplinary
Kai Chen, Runqiu Huang, Yao Li, Sicong Lin, Wenxin Zhu, Nobumichi Tamura, Ju Li, Zhi-Wei Shan, Evan Ma
ADVANCED MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Guangni Zhou, Wolfgang Pantleon, Ruqing Xu, Wenjun Liu, Kai Chen, Yubin Zhang
Summary: A novel approach based on the classical Wilkens' method has been developed to quantify the local dislocation density using X-ray radial profiles obtained by 3D synchrotron monochromatic X-ray microdiffraction. The results show that the local dislocation densities vary with depths along the incident X-ray beam in both phases, with consistently higher densities in the gamma matrix than in the gamma ' precipitates. The new method shows broad application potential in heterogeneous materials and was applied to quantify local dislocation densities in a fatigued two-phase Ni-based superalloy.
MATERIALS RESEARCH LETTERS
(2021)
Article
Engineering, Mechanical
Xuan Huang, Wenxin Zhu, Kai Chen, R. Lakshmi Narayan, Upadrasta Ramamurty, Liucheng Zhou, Weifeng He
Summary: This study investigates the microstructure changes in the surface layers of titanium subjected to laser shock peening (LSP) using electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). The results show different twin variants and dislocation densities induced by LSP, with twin density decreasing and dislocation density increasing with depth. Furthermore, the study finds that dislocations play a more significant role in the strengthening of the material compared to grain refinement. These findings are important for the design of alloys and the improvement of mechanical performance through LSP.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Sicong Lin, Kai Chen, Qiang Zeng, Upadrasta Ramamurty
Summary: By slowly ramping the annealing temperature to the β-solvus point, plastic deformation can be recovered and the critical strain for recrystallization can be enhanced, thus preventing recrystallization during the subsequent supersolvus solutionizing treatment. The method has been successfully validated in single crystals compressed to 5.9% plastic strain at room temperature. After supersolvus solutionizing, an almost dislocation-free single crystal with uniformly distributed β'-precipitates is obtained. The proposed method offers a practical means to bring down the overall expenses of single crystal turbine blades.
MATERIALS RESEARCH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Xiaofei Sun, Meijuan Li, Anastase Ndahimana, Peng Ding, Youlong Xu, Qiongdan Hu, Kai Chen, Tianyu Feng
Summary: A biomimetic ear-of-wheat-like nanocomposite of ultrafine Mn(3)O(4) nanoparticles and multi-walled carbon nanotubes was successfully prepared, showing excellent reversible capacity and cycling stability for lithium storage. This unique nanostructure and facile biomimetic method have great potential for designing high-performance energy materials for lithium/sodium ion batteries and fuel cells.
ENERGY & ENVIRONMENTAL MATERIALS
(2021)
Article
Chemistry, Physical
Hao Shen, Eongyu Yi, Marco Amores, Lei Cheng, Nobumichi Tamura, Dilworth Y. Parkinson, Guoying Chen, Kai Chen, Marca Doeff
JOURNAL OF MATERIALS CHEMISTRY A
(2019)
Review
Instruments & Instrumentation
Guangni Zhou, Jiawei Kou, Yao Li, Wenxin Zhu, Kai Chen, Nobumichi Tamura
QUANTUM BEAM SCIENCE
(2018)
Article
Materials Science, Multidisciplinary
Jun-Ping Du, Yun-Jiang Wang, Yu-Chieh Lo, Liang Wan, Shigenobu Ogata