Article
Materials Science, Multidisciplinary
Bin Wang, Hongli Zhao, Xizhao Shan, Yu Tang, Bingxing Wang, Yong Tian
Summary: The hot-deformation behavior and dynamic recrystallization (DRX) mechanism of Ti2ZrTa0.75 refractory complex concentrated alloy were studied via uniaxial compression tests. The stress-strain curves showed continuous strain softening after the peak stress. Microstructure analysis revealed that DRX occurred during the hot deformation process and its fraction and grain size increased with temperature and/or decreased strain rate. The occurrence of continuous dynamic recrystallization (CDRX) was proven through cumulative misorientation analysis.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Shuai Yuan, Jinhui Wang, Lei Zhang, Peipeng Jin
Summary: This study investigated the hot deformation behavior of a heat-treated Mg-12Y-1Al alloy containing long-period stacking ordered (LPSO) phase through uniaxial compression experiments. The flow stress decreased with increasing temperature and decreasing strain rate. Dynamic recrystallization (DRX) was promoted by higher temperatures. The main DRX mechanism observed was discontinuous dynamic recrystallization (DDRX), while the dense lamellar LPSO at the grain boundary hindered DDRX. The deformed microstructure showed a typical [0001]//CD texture, and its intensity decreased with increasing temperature due to multiple slip systems activation and increased DRX fraction.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Ruoxian Wang, Gaowu Qin, Erlin Zhang
Summary: This study investigated the dynamic recrystallization behavior of a biomedical CoCrW-2Cu alloy through isothermal compression tests. It was found that the variation of deformation condition had limited influence on the phase component, while the strain rate had a significant influence on the extent of recrystallization. The results of this study can contribute to the optimization of hot deformation parameters.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Shiqi Li, Qinghuan Huo, Sijia Hu, Chunyu Wang, Zhirou Zhang, Yuxiu Zhang, Tao Chen, Xuyue Yang
Summary: The effects of original orientations on the dynamic recrystallization behaviors of a hot-rolled Mg-1.0wt% Ca plate were investigated. It was found that dynamic recrystallization occurred more easily in the normal direction sample at the same temperature. As the temperature increased, the area fraction and size of the dynamic recrystallized grains improved faster in the rolling direction sample. The Mg-1.0wt%Ca alloy significantly postponed both the continuous and discontinuous dynamic recrystallization processes compared to commercial Mg alloys.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Zhaoning Xu, Liujie Xu, Ning Xiong, Yuan Yao, Xiuqing Li, Shizhong Wei
Summary: In this study, the high-temperature deformation process of molybdenum alloy reinforced by 2.0%ZrO2 was investigated, and the microstructure evolution was analyzed. The relationship between deformation temperature, strain rate, and flow stresses was established. The research found that the alloy mainly undergoes dynamic recrystallization at high temperatures and low strain rates, with partial dynamic recrystallization occurring at high strain rates and low temperatures. Additionally, the alloy has low activation energy, making it suitable for hot working, and exhibits two typical textures after high temperature deformation.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Engineering, Mechanical
Wei Liu, Yuhong Zhao, Yuntao Zhang, Chuan Shuai, Liwen Chen, Zhiquan Huang, Hua Hou
Summary: Understanding the dynamic precipitation of LPSO phase and its effect on dynamic recrystallization in Mg-based alloys can provide insights for the manufacturing of high-performance alloys. This study found that the increase of Y and Zn atoms promotes the dynamic precipitation of 14H-LPSO phase in non-DRX and DRX grains respectively during hot extrusion.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Metallurgy & Metallurgical Engineering
Dong Chen, Qian-ru Yang, Na-chuan Yang, Meng Wang, Qiang Xu, Jing-yuan Wu, Yan-bin Jiang, Zhou LI, Zhu Xiao, Hai-gen Wei
Summary: This study investigated the hot deformation behavior and microstructure of 60NiTi alloy during hot compressive deformation using the Gleeble-3500 thermal simulation test machine. The temperature range was 500-650 degrees C and the strain rate range was 0.001-1 s-1. A constitutive equation for hot compression was constructed and hot processing maps were plotted. The peak stress reduced with an increase in compression temperature or a decrease in strain rate. The hot deformation activation energy was calculated as 327.89 kJ/mol, and the appropriate hot working parameters were determined. The recrystallization degree increased with increasing compression temperature, and the Ni3Ti phase tended to aggregate with an increase in strain rate.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Metallurgy & Metallurgical Engineering
Wei Liu, Yu Su, Yuntao Zhang, Liwen Chen, Hua Hou, Yuhong Zhao
Summary: This study investigates the variation in LPSO structures, dynamic recrystallization, and mechanical performance of Mg89Y4Zn2Li5 alloys fabricated at different extrusion speeds and die angles. It is found that the block 18R LPSO structures elongate while the lamellar 14H LPSO structures dissolve. The hot-extruded alloys exhibit a full DRX microstructure, and the DRX grain size decreases with decreasing extrusion speed and die angle. The Mg89Y4Zn2Li5 alloy achieves an excellent strength-ductility balance at a low extrusion speed and small die angle.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
Lei Zhang, Shuai Yuan, Jinhui Wang, Lijia Chen, Peipeng Jin
Summary: This study investigated the effect of deformation temperature and strain rate on the hot deformation mechanism of an as-cast Mg-5Al-0.6Sc alloy. The results showed that the flow stress decreased with increasing temperature and decreasing strain rate. A constitutive equation was established to accurately predict the hot deformation behavior of the alloy. The optimal processing area was determined based on processing maps, and the microstructure evolution and dynamic recrystallization mechanism of the alloy were analyzed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Chenhui Li, Hua Hou, Ruifeng Dong, Xiaoyang Zhang, Xiaolong Xu, Yuhong Zhao
Summary: This study investigates the microstructural characteristics, dynamic recrystallization, and mechanical properties of hot-rolled AZ31B. The results indicate that different recrystallization mechanisms are responsible for the microstructural evolution during rolling deformation. The mechanisms of twin-induced nucleation and stress-induced grain boundary migration dominate the recrystallization process, leading to grain refinement and an excellent strength-ductility balance in the specimens with a rolling reduction of 75%.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yanchao Li, Wen Zhang, Xiaohui Lin, Jianfeng Li, Hailong Xu
Summary: The hot deformation behavior of W-3Re-5HfC alloy was studied by compression tests at temperatures of 1200-1500 degrees C and strain rates of 0.001-1 s(-1) using a Gleeble-1500D thermal simulator. The flow stress was found to increase with increasing strain rates or decreasing deformation temperature. The effects of deformation temperature and strain rates resulted in stages of hardening, softening, and steady behavior. A constitutive equation was established based on the experimental data, with an apparent activation energy of 361 kJ mol(-1). Hot processing maps were constructed at two true strain levels (0.1 and 0.6), and instability regions were identified at 1200-1300 degrees C/0.001-0.1 s(-1) and 1400-1500 degrees C/0.1-1 s(-1). In the stable region at 1500 degrees C/1 s(-1), dynamic recovery and dynamic recrystallization occurred, with the dominant mechanism being dynamic recovery and grain growth.
Article
Materials Science, Multidisciplinary
Jiachen Li, Xiaodong Wu, Lingfei Cao, Bin Liao, Yichang Wang, Qing Liu
Summary: The hot deformation behavior of Al-Mg-Si alloys was studied through isothermal compression tests, revealing that the dynamic recrystallization mechanism depends on the Zener-Hollomon values. Three different DRX mechanisms were observed during the experimental process.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Guoqi Chang, Wei Li, Guisheng Deng, Yuandong Liu
Summary: The effects of pre-twinning on the microstructure and dynamic compression properties of non-aged and artificially aged Mg-Y-Nd-Gd-Zr alloys were investigated. Pre-deformation in the T3 alloy generated high-density dislocations and deformation twins, while artificial aging in the T8 alloy resulted in a decrease in dislocation density and the appearance of precipitates. Evaluation of dynamic compression properties showed that the T8 alloy had a higher compressive yield strength compared to the T61 alloy. However, their ultimate compressive strengths were similar due to the synergistic effect between dislocations, twin boundaries, and precipitates. These findings suggest that the pre-twinning approach can improve the strength of magnesium alloys.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Ali Shabani, Mohammad Reza Toroghinejad, Marieh Aminaei, Pasquale Cavaliere
Summary: The dynamic recrystallization behavior of FeCrCuMnNi high entropy alloy was investigated, and it was found that dDRX mechanism was the dominant mechanism during hot deformation, bulging was an effective mechanism for inducing new recrystallized nuclei, and grain growth was slower compared to conventional alloys. This behavior was attributed to continuous nucleation, slow diffusion, high solution hardening characteristics of high entropy alloys, and the presence of multiple phases.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Metallurgy & Metallurgical Engineering
Yu-Ying He, Sheng-Wen Bai, Gang Fang
Summary: In this study, the dynamic recrystallization (DRX) behavior of a Mg-Al-Zn-RE alloy with abundant second-phase particles during hot extrusion is investigated using a combination of finite element (FE) and cellular automaton (CA) models. The results show that the extrusion conditions have a significant influence on the microstructural evolution of the magnesium alloy.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Chemistry, Multidisciplinary
Meidi Wang, Yutong Wang, Junyi Zhao, Jiyu Zou, Xu Liang, Ziting Zhu, Jiashi Zhu, Hongjian Wang, Yuhan Wang, Fusheng Pan, Zhongyi Jiang
Summary: Here, an electrochemical interfacial polymerization strategy was used to fabricate ultrathin COF membranes with a thickness of 85 nm by actively manipulating the self-healing effect and self-inhibiting effect. The resulting COF membrane showed superior performance in brine desalination with a permeation flux of 92 kg m(-2) h(-1) and a rejection of 99.96%. Our electrochemical interfacial polymerization strategy enriches the fabrication approach of COF membranes and facilitates the rational design of ultrathin membranes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Peng Peng, Jia She, Qingshan Yang, Shuai Long, Aitao Tang, Jianyue Zhang, Qingwei Dai, Fusheng Pan
Summary: A new low-cost and high mechanical strength Mg-0.5Gd-xMn (x = 0, 0.5, 1.0, 1.5, 2.0 wt. %) alloy system was developed by low-temperature extrusion. The alloy exhibited gradually increased yield strength and ultimate tensile strength with the increment of the Mn content. It possessed comparable high mechanical strength with heavy rare-earth content traditional Mg alloys but at a much lower cost.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
S. S. Dash, D. J. Li, X. Q. Zeng, D. Y. Li, D. L. Chen
Summary: The aim of this study is to investigate the monotonic and cyclic deformation behavior of a high-pressure die cast Silafont (R)-36 alloy in a naturally-aged T4 state. The T4 heat treatment led to significant microstructural changes, resulting in the transformation of coralloid-like eutectic Si particles to spheroidal Si particles embedded in the Al matrix. The T4 alloy exhibited strong cyclic hardening and a longer low cycle fatigue life compared to its as-cast state at lower strain amplitudes, attributed to particle-dislocation interactions during deformation. A strain energy density-based model incorporating microstructural aspects can be used to predict the fatigue life of the T4 alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Engineering, Manufacturing
Qiang Liu, Ying Liu, Qing Luo, Jiangfeng Song, Biquan Xiao, Bin Jiang, Liangyin Wu, Hua Zhao, Qiuyan Shen, Fusheng Pan
Summary: Low-cost Mg-1Mn-0.5Al (MA10) alloys with good comprehensive strength and ductility have been developed as potential substitutes for commercial AZ31 alloys. The rollability of MA10 alloy sheets in terms of edge cracking behavior was improved by multi-pass online heating rolling at different temperatures. The improvement can be attributed to the more uniform microstructure, higher degree of recrystallization, more homogeneous strain distribution, and increased activation of non-basal slips at the edge.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Materials Science, Multidisciplinary
Jun Xu, Jun Zhao, Bin Jiang, Wenjun Liu, Hong Yang, Xintao Li, Yuehua Kang, Nan Zhou, Kaihong Zheng, Fusheng Pan
Summary: Mg-3Al-1Zn (AZ31) sheets were produced by transverse gradient extrusion (TGE) process. The microstructures, textures, and mechanical behavior of TGE and conventional extruded (CE) sheets were studied and compared. TGE sheets exhibited finer grain structure, unique textures, and higher ductility compared to CE sheets. Both basal slip and tensile twins were activated during deformation in TGE sheets.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Cong Dang, Jingfeng Wang, Jinxing Wang, Di Yu, Wenxuan Zheng, Changbing Xu, Zihong Wang, Le Feng, Xianhua Chen, Fusheng Pan
Summary: In this study, a bimodal grain structure consisting of fine recrystallized grains and coarse unrecrystallized grains was obtained by adding Mn into the Mg matrix and using low extruded temperature. The fine recrystallized grains promote grain boundary slip and enhance the alloy's plasticity. The presence of parallel dislocations in the unrecrystallized grains, caused by the suppressed dislocation recovery and dynamic recrystallization rate at low temperature, leads to a high work hardening rate in the bimodal grain structure, resulting in a high yield strength and improved damping capacity at room temperature for Mg-Mn alloys.
Article
Metallurgy & Metallurgical Engineering
Yunxuan Zhou, Wenjun Tian, Quan Dong, Hailian Wang, Jun Tan, Xianhua Chen, Kaihong Zheng, Fusheng Pan
Summary: In this study, nine different Mg/Mg2Y interface models were constructed and systematically explored using first principles calculations. The results showed that the stability of the Mg2Y(0001) surface depends on the yttrium chemical potential. The Mg(0001)/Mg2Y(0001) interface with Y-HCP stacking exhibited the highest thermodynamic stability. The strong interface of Mg/Mg2Y is attributed to the formation of Mg-Y chemical bonds.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Mingyu Wu, Guijiang Diao, Zhen Xu, Ruiken Sim, Wengang Chen, Daolun Chen, Dongyang Li
Summary: Microstructure, mechanical properties, wear resistance, corrosion and corrosive wear resistance of AlCrFeNiWx (x = 0, 0.1, 0.2, 0.3 and 0.4) medium-entropy alloys (MEAs) prepared by vacuum arc melting process were investigated. Tungsten addition in AlCrFeNi alloy significantly improves its hardness, strength, pitting resistance and passivation property, while excessive W addition reduces ductility. AlCrFeNiW0.3 shows the highest corrosion resistance and W enhances the wear and corrosive wear resistance in AlCrFeNiW0.4.
Article
Materials Science, Multidisciplinary
Jianxin Zhou, Xiaojun Luo, Hong Yang, Bin Jiang, Wenlong Xie, Zhihua Dong, Jiangfeng Song, Junyao Xu, Guangsheng Huang, Dingfei Zhang, Fusheng Pan
Summary: The microstructural features of GWZ1352 alloys can be tailored by altering the cooling rates. Lower cooling rates result in an increased number and decreased spacing of lamellar long period stacking ordered (LPSO) phase. The excellent high temperature mechanical properties of the furnace-cooling (FE) alloy are mainly attributed to the abundant lamellar LPSO phase.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yingying Li, Yuan Yuan, Jun Wang, Liang Wu, Fuyong Cao, Ligang Zhang, Fusheng Pan
Summary: The biodegradation behavior and mechanical properties of Mg-Sr-Y alloys were studied, and it was found that the Mg-0.3Sr-0.5Y alloy exhibited low corrosion rate (0.823 mm y(-1)) in Hanks' solution, attributed to the solid solution of Y in α-Mg phase and Mg17Sr2 phase and the formation of a protective film.
NPJ MATERIALS DEGRADATION
(2023)
Article
Metallurgy & Metallurgical Engineering
Hua Zhao, Jiangfeng Song, Jing Wang, Qiang Liu, Gong Chen, Jianfei Xiao, Jin'ge Liao, Hang Teng, Bin Jiang, Fusheng Pan
Summary: In this study, the relationship between semi-solid deformation and hot tearing susceptibility of magnesium alloys was investigated. Tensile experiments were conducted on binary Mg-xCa (x = 0.2, 0.5, and 2 wt%) alloys using a Gleeble 3500 thermal simulator. The linear contraction of the alloys was measured using a novel apparatus based on a constrained rod casting (CRC) hot tearing apparatus. The results showed that the ultimate tensile strength (UTS) and fracture elongation (FE) of the alloys decreased with decreasing solid fraction (increasing test temperature). It was found that Mg-0.5Ca alloy had the highest hot tearing susceptibility, attributed to its extremely low ductility even at a high solid fraction of 0.96 and the highest linear contraction among the three alloys.
INTERNATIONAL JOURNAL OF METALCASTING
(2023)
Article
Nanoscience & Nanotechnology
Junlei Zhang, Yingxing Zhang, Xiang Chen, Zulai Li, Guangsheng Huang, Fusheng Pan
Summary: Two types of welding processes, DS-FSW and SS-FSW, were used for dissimilar welding between AM60 and AZ31 Mg alloys. The microstructure observation indicated that the microstructure of the joint nugget zone (NZ) under both processes was refined after welding and their grain size was relatively close. The tensile tests revealed that the DS-FSW joint exhibited excellent mechanical properties compared with the SS-FSW joint due to its large processing volume, lower volume proportion of the stirring zone, and symmetrically distributed weld zone structure improved the deformation coordination of the joint, thereby delaying its premature fracture and exhibiting better mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Shiyu Jiang, Li Yang, Yuan Yuan, Ligang Zhang, Jun Wang, Tao Chen, Aitao Tang, Lifeng Ma, Fusheng Pan
Summary: In order to ensure good corrosion resistance and mechanical properties of Mg-Al alloys, it is necessary to strictly control the iron (Fe) impurity. This study investigated the effects of alloying elements and temperatures on the solubilities of Fe in Mg-Al-based alloy melts. It was found that the addition of yttrium (Y) or manganese (Mn) elements could significantly reduce the solubilities of Fe in Mg-xAl (x = 1 and 3 wt.%) alloy melts.
Article
Chemistry, Multidisciplinary
Yuhan Wang, Junyi Zhao, Sui Zhang, Zhiming Zhang, Ziting Zhu, Meidi Wang, Bohui Lyu, Guangwei He, Fusheng Pan, Zhongyi Jiang
Summary: A two-step method for synthesizing COF nanosheets and membranes is proposed. The method involves framework assembly and functional group switching. The fabricated COF membranes demonstrated excellent separation performance.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Physical
Xiaolin Hu, Jichuan Fan, Ronghua Wang, Meng Li, Shikuan Sun, Chaohe Xu, Fusheng Pan
Summary: By combining vacancies and heterogeneous interfacial engineering, three-dimensional core-shell NiCoP/NiO heterostructures with dominated oxygen vacancies have been constructed for efficient electrocatalysis. These materials possess multiple exposed active sites, faster mass transfer behavior, optimized electronic structures, and improved electrochemical performance.
GREEN ENERGY & ENVIRONMENT
(2023)
