Article
Materials Science, Multidisciplinary
Xuemei Yang, Jinhui Zhao, Xuewei Yan, Xiaonan Shi, Hongzhen Guo
Summary: The high-temperature deformation behavior of a titanium alloy with initial lamellar microstructure was studied through hot compression experiments. Dynamic softening behavior was identified and verified, and a constitutive model incorporating this behavior was constructed.
HIGH TEMPERATURE MATERIALS AND PROCESSES
(2022)
Article
Crystallography
Meirong Shuai, Binbin Chang, Min Zhang, Zhibing Chu, Haibin Li, Liang Li, Lu Zhou
Summary: To ensure the long-lasting performance of concrete buildings in marine environments, it is crucial to develop building materials with excellent corrosion resistance and weatherability. Stainless steel cladding, with its corrosion resistance and cost advantages, is considered suitable for highly corrosive environments. This study investigates the deformation coordination and microstructure evolution near the interface of stainless steel/carbon steel cladding. Experimental analysis and modeling reveal that the coordination of deformation significantly increases near the interface, accompanied by a large number of recrystallized grains, contributing positively to the overall material performance.
Article
Materials Science, Multidisciplinary
Ji-Lin Zhang, Hai-Shen Jia, Xiang-Bin Yi, Chuang-Wen Xu, Wen-Cui Luo, Lin-Hu Tang, Jian-Cheng Shen, Xiao Li
Summary: The purpose of this study was to investigate the dynamic mechanical properties and constitutive relationship of martensitic stainless steel 0Cr17Ni4Cu4Nb through impact and compression tests. The results showed that the P-L model slightly outperformed the J-C model in fitting accuracy. The dynamic mechanical properties of the material were evaluated in terms of strain-rate sensitivity and temperature sensitivity, yielding results consistent with test outcomes.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Chemistry, Physical
Jinhui Wang, Lei Zhang, Peipeng Jin, Lijia Chen, Xiaoguang Yuan, Hongbin Ma
Summary: The dynamic mechanical behaviors of the as-extruded Mg-1Al-6Y alloy were investigated using split Hopkinson pressure bar (SHPB). The results revealed that the microstructures and deformation mechanisms of the extruded alloy are sensitive to the strain rates and temperatures. The yield strength and compressive strength of the alloy are improved with increasing strain rate and weakened with increasing temperature. Temperatures have a significant influence on the dynamic mechanical behaviors of Mg-1Al-6Y.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Yong Hu, Lihua Wang, Minghui Ouyang, Yongqi Hu, Cheng Chu
Summary: This study investigates the hot deformation behaviors and softening mechanism of 6%Si high-silicon austenitic stainless steel. The constitutive equation is established based on the stress-strain curves, and the processing maps are drawn using the Dynamic Material Model (DMM). The results show that the best hot workability is achieved in the temperature range of 1130-1170℃ at a strain rate of 0.01-0.03 s-1. At higher strain rates, the material is easily destabilized, but in the non-destabilized zone, better microstructure can be obtained. The softening mechanism is mainly attributed to discontinuous dynamic recrystallization (DDRX), with continuous dynamic recrystallization (CDRX) occurring between 1100 and 1150℃.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Geological
Zongxing Zou, Rui Mu, Yinfeng Luo, Bing Guo, Lei Tan, Aijun Su, Chunyan Tang
Summary: This study proposes a progressive evaluation method for buckling landslide stability considering the shear mechanical characteristics of the slip zone. The proposed method was validated with a case study, showing good agreement between the evaluation result and observation.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2022)
Article
Engineering, Mechanical
Michal Kucewicz, Pawel Baranowski, Lukasz Mazurkiewicz, Jerzy Malachowski
Summary: This paper provides a detailed comparison study of three selected material models in hydrocodes for understanding the behavior of rock under blast-and shock-induced loadings. The JH-2 model is selected based on the comparison study to simulate a representative blast in a mining face, demonstrating its efficiency in the simulation of drilling and blasting.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Qing Ma, Ke Wei, Yong Xu, Lijuan Zhao, Xiang Zhang
Summary: The static softening behavior and dislocation density evolution of TA15 titanium alloy during double-pass hot deformation were investigated. The results showed that the globularization behavior of primary a phase is emerged during the inter-pass of double-pass hot deformation. The groove of primary a phase is preferentially generated when the inter-pass holding time within 1000s. Additionally, the dislocation density in the inter-pass gradually decreases with the holding time and deformation temperature increasing.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Construction & Building Technology
Wonjun Shin, Hwisan Park, Jihoon Han
Summary: The study proposes a modified concrete material model that accurately represents the dynamic response and fracture behavior of concrete by considering strain rate-dependent parameters. The model is validated by comparing the numerical simulations with experimental results, showing good agreement.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Metallurgy & Metallurgical Engineering
Tong Lu, Zhen-hua Dan, Kai LI, Dan-qing Yi, Lian Zhou, Hui Chang
Summary: The hot deformation behaviors and microstructure evolution of Ti-3Al-5Mo-4Cr-2Zr-1Fe (Ti-35421) alloy in the fl single field were investigated through isothermal compression tests. It was found that discontinuous yield phenomenon and rheological softening are influenced by strain rates and deformation temperatures. By determining critical conditions for dynamic recrystallization, establishing a kinetic model, and constructing an Arrhenius constitutive model, the rheological behaviors of the alloy were accurately predicted above the fl phase transformation temperature.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Engineering, Mechanical
Zhiwu Zhu, Guanghan Zhang, Chao Feng, Shoune Xiao, Tao Zhu
Summary: In this study, a systematic experimental evaluation of 6008 Al alloys was conducted to analyze the macro- and micro-mechanical responses and mechanisms for plastic deformation at various strain rates and temperatures. It was found that an increase in strain rate led to an increase in dislocation density, while second-phase particle precipitation prevented dislocation movement and flow stress. On the other hand, impact deformation involved the dissolution of a supersaturated solid solution and thermal activation. A constitutive model based on the evolutionary mechanism of dislocation density was proposed, which reasonably described the dynamic plastic evolution of 6008 Al alloys.
ACTA MECHANICA SINICA
(2023)
Article
Materials Science, Multidisciplinary
B. K. Kim, L. Tan, H. Sakasegawa, C. M. Parish, W. Zhong, H. Tanigawa, Y. Katoh
Summary: The study revealed that doping with Ni-58 resulted in greater strengthening contributions from loops and cavities, leading to higher hardening and lower ductility compared to Ni-60 doping in reduced-activation ferritic-martensitic steels under helium irradiation.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Hui Li, Yuanchun Huang, Yu Liu
Summary: The thermal deformation behavior of as-forged Al-Zn-Mg-(Cu) aluminum alloy was studied by isothermal compression test. The effects of strain rate, temperature, and strain on dynamic recrystallization behavior and substructure evolution were determined. The results showed that different dynamic recrystallization mechanisms occur under different conditions, with discontinuous dynamic recrystallization being the main mechanism at lower temperature and higher strain rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Geosciences, Multidisciplinary
Zhoujie Gu, Rongxi Shen, Zhentang Liu, Xin Zhou, Xiaoliang Li, Zesheng Zang, Li Zhang, Wei Liu, Xi Wang
Summary: By using the split Hopkinson bar system, the mechanical behavior and energy change of coal were analyzed, and it was found that cracks were produced along the axial direction of coal samples under dynamic loading. The damage degree of coal samples intensified gradually within a certain range of strain rate. A dynamic mechanical constitutive model considering the influence of strain rate was established, and the damage changes of coal samples were analyzed.
NATURAL RESOURCES RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
Yang Wang, Qiang Liu, Biao Zhang, Haoqian Zhang, Zhaoxin Zhong, Jian Ye, Yuhan Ren, Liying Shen, Feng Ye, Wen Wang
Summary: Inspired by nacreous architecture, 2024Al/20-50 vol% B4C composites with a lamellar-interpenetrated structure were successfully manufactured via freeze casting and pressure infiltration. The quasi-static and dynamic characteristics were conducted at different strain rates. The study found that the strength of the composites increased with increasing strain rates, but brittleness could occur at high strain rates. Additionally, particle reinforcement enhanced the strength and strain rate sensitivity of the composites.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
