Article
Physics, Applied
David Koch, Benedikt Beckmann, Nuno M. Fortunato, Olga N. Miroshkina, Markus E. Gruner, Hongbin Zhang, Oliver Gutfleisch, Wolfgang Donner
Summary: This study investigates the chemical ordering in Ni(Co)MnTi alloys using neutron and x-ray diffraction techniques. It is found that there is no Heusler-typical L2_1 order between Ti and Mn, and there is no ordering among Co and Ni atoms. However, the phase transition of Co containing samples can be significantly altered by changing the degree of B2 order with proper heat treatment.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Characterization & Testing
Peihao Song, Akash R. Trivedi, Clive R. Siviour
Summary: In this research, the thermomechanical properties of different polycarbonates were extensively characterized to study their mechanical behavior under different conditions. Dynamic Mechanical Analysis and quasi-static tensile tests were conducted to obtain modulus data and strain fields. Compression tests were also performed at various strain rates and temperatures. The results showed that the mechanical response of polycarbonates is highly rate and temperature-dependent, and yield stress increases with increasing strain rate or decreasing temperature.
Article
Chemistry, Multidisciplinary
Yanfei Mu, Yuhan Peng, Xiaodong Tang, Jie Ren, Jiangkuan Xing, Kun Luo, Jianren Fan, Ke Zhang
Summary: The study conducted experimental and kinetic research to investigate and model tobacco pyrolysis characteristics under a wide range of heating conditions. Results showed that tobacco was sufficiently devolatilized at high temperatures and final volatiles yields were not significantly impacted by heating rate, while DTG curve displayed a polymerization trend with increasing heating rate. Additionally, the study derived kinetic parameters and found that activation energy of each component was insensitive to heating rate, leading to the establishment of a power correlation between heating rate and preexponential factor.
Article
Materials Science, Multidisciplinary
Yuntian Wang, Xiangguo Zeng, Huayan Chen, Xin Yang, Fang Wang, Lingxi Zeng
Summary: This study presented the classical Johnson-Cook model with a new temperature term and established an inner relationship among temperature, elastic modulus, specific heat capacity at constant pressure, and Poisson's ratio. The improved model can effectively predict mechanical behavior even at temperatures lower than the reference temperature, without the need for fitting parameters. Using a multi-objective approach combined with various methods, the proposed model successfully reproduced stress-strain responses of metallic materials under complex conditions.
RESULTS IN PHYSICS
(2021)
Article
Polymer Science
Huanming Chen, Peihao Song, Thomas Commins, Aaron Graham, Akash R. Trivedi, Clive R. Siviour
Summary: This paper investigates the mechanical properties of epoxy resins under different strain rates and temperatures using experiments and model fitting. By applying the principle of time-temperature equivalence, a constitutive model is developed to accurately predict the stress-strain behavior of the material.
Article
Engineering, Mechanical
D. S. Connolly, C. P. Kohar, K. Inal
Summary: Transformation induced plasticity (TRIP) is a common effect in advanced high strength steels (AHSS) that has promising applications in the automotive industry. Accurate thermo-mechanical modeling is crucial for utilizing the improved performance of AHSS exhibiting the TRIP effect. This study develops a novel crystal plasticity formulation that incorporates strain-induced martensitic transformation, and calibrates the model for a QP3Mn alloy. The calibrated model shows good agreement with literature trends and demonstrates the importance of capturing strain-rate dependent transformation.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Chemistry, Physical
Yongyong Suo, Jintao Li, Zhilun Deng, Bo Wang, Quanzhao Wang, Dingrui Ni, Purong Jia, Tao Suo
Summary: The high-temperature dynamic compressive properties of the 30% SiCp/6092Al composite showed different behaviors, with flow stress nonlinearly varying with increasing temperature. The microscopic failure mechanisms of the composite were greatly influenced by ambient temperature and strain rate.
Article
Chemistry, Physical
Jing Sun, Oriol Vendrell
Summary: This letter investigates the observed modification of thermal chemical rates in Fabry-Perot cavities and explains the mechanism behind the reduction in transmission coefficient and rate due to friction caused by cavity-reactor coupling. The authors evaluate the transmission coefficient and identify conditions for rate acceleration using an ab initio potential energy surface for the cis-trans isomerization of HONO.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Anju Ajayan Kongasseri, Shagufi Naz Ansari, Swadhin Garain, Sopan M. Wagalgave, Subi J. George
Summary: This study demonstrates a tunable phosphorescence emission in organic materials through a cocrystallization approach, offering a new perspective for the development of efficient organic phosphors.
Article
Chemistry, Physical
S. Udhayakumar, G. Jagadish Kumar, E. Senthil Kumar, M. Navaneethan, K. Kamala Bharathi
Summary: The study investigated the magnetic anomalies of Sr-doped LiFe5O8 materials, showing that Sr doping leads to low-temperature magnetic anomalies and exhibits hard magnetic behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Fan Liu, Jin Wang, Shuchang Long, He Zhang, Xiaohu Yao
Summary: This paper investigates the viscoelastic-viscoplastic (VE-VP) deformation behavior of amorphous polymers through experimental and modeling study. It was found that common assumptions cannot fully explain the observed deformation behaviors. By assuming the existence of a glassy network formed from weak linkages in the polymer, the observed behaviors can be well explained. A constitutive model based on the glassy network assumption is capable of representing the loading, strain recovery, and stress relaxation behaviors simultaneously, in contrast to most of the existing models.
MECHANICS OF MATERIALS
(2022)
Article
Chemistry, Physical
Wei Fang, Pierre Winter, Jeremy O. Richardson
Summary: Semiclassical instanton theory is a useful tool for calculating thermal reaction rates, but previous formulations have limitations in computational feasibility and reliability. A new microcanonical formulation called density-of-states instanton theory is proposed in this paper, which overcomes these limitations by avoiding summing over states and achieving a balance between computational efficiency and reliability.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2021)
Article
Engineering, Electrical & Electronic
Muhammad Ahmed Khan, Murtaza Saleem, Shahid M. Ramay, Syed Kumail Abbas, Hamid M. Shaikh, Shahid Atiq
Summary: MoS2 and ITO thin films are extensively studied materials due to their wide usage in opto-electronic equipment. Composite thin films of MoS2/ITO showed improved uniformity of grains compared to pure MoS2 films. Optical analysis revealed that MoS2/ITO composite thin films have great potential for use in optical devices due to their unique optical properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Giacomo Mandelli, Luca Corneo, Chiara Aieta
Summary: In this study, the full-dimensional semiclassical transition state theory was applied to estimate the rate constant of glycine interconversion between different conformers. The results showed that the theoretical method used in this study improved upon previous methods and aligned well with experimental measurements. The study confirmed the accuracy and applicability of the theory, especially in cryogenic temperatures where deep tunneling regime is usually not considered.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Engineering, Environmental
Tong Xu, Jingwen Chen, Xi Chen, Huaijun Xie, Zhongyu Wang, Deming Xia, Weihao Tang, Hong-Bin Xie
Summary: The study experimentally measured the pK(a) and k(B) values of six parabens, established quantitative structure-activity relationship models to fill the data gaps, and estimated the base-catalyzed hydrolysis half-lives range.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
D. L. Tsyganov, A. I. Veremeichik, M. I. Sazonov
INSTRUMENTS AND EXPERIMENTAL TECHNIQUES
(2015)
Article
Physics, Fluids & Plasmas
D. Tsyganov, N. Bundaleska, E. Tatarova, A. Dias, J. Henriques, A. Rego, A. Ferraria, M. V. Abrashev, F. M. Dias, C. C. Luhrs, J. Phillips
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2016)
Article
Physics, Applied
D. L. Tsyganov
Article
Engineering, Mechanical
D. L. Tsyganov, A. I. Veremejchik, M. Gradzka-Dahlke, M. I. Sazonov, V. M. Khvisevich
JOURNAL OF FRICTION AND WEAR
(2016)
Article
Physics, Applied
Dmitry L. Tsyganov, Neli Bundaleska, Elena Tatarova
PLASMA PROCESSES AND POLYMERS
(2017)
Article
Physics, Applied
D. L. Tsyganov
Article
Chemistry, Physical
D. L. Tsyganov
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
(2017)
Article
Physics, Multidisciplinary
D. L. Tsyganov
Article
Chemistry, Physical
N. Bundaleska, D. Tsyganov, A. Dias, E. Felizardo, J. Henriques, F. M. Dias, M. Abrashev, J. Kissovski, E. Tatarova
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2018)
Article
Physics, Applied
D. L. Tsyganov
Article
Physics, Applied
D. L. Tsyganov
Article
Chemistry, Physical
N. Bundaleska, D. Tsyganov, E. Tatarova, F. M. Dias, C. M. Ferreira
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2014)
Article
Chemistry, Physical
D. Tsyganov, N. Bundaleska, A. Dias, J. Henriques, E. Felizardo, M. Abrashev, J. Kissovski, A. M. Botelho do Rego, A. M. Ferraria, E. Tatarova
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Multidisciplinary Sciences
Dmitry L. Tsyganov
SN APPLIED SCIENCES
(2019)
Article
Thermodynamics
A. N. Veremeichik, M. I. Sazonov, V. M. Khvisevich, D. L. Tsyganov
JOURNAL OF ENGINEERING PHYSICS AND THERMOPHYSICS
(2015)