Article
Automation & Control Systems
Yufeng Zhang, Meiying Zhao, Qinglong Wang, Wen Peng, Xu Li, Hongshuang Di, Dianhua Zhang
Summary: The efficiency of the flatness actuator is crucial for maintaining the quality of strip shape and microstructure properties in commercial strip steel. However, the fluctuation in the thermal crown of the work rolls during the cold rolling process significantly impacts strip flatness quality. Obtaining real-time updates on the thermal crown alterations of the work rolls presents notable difficulties.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Automation & Control Systems
Pengfei Wang, Jiannan Li, Xu Li, Shuwei Duan, Huagui Huang, Dewei Wang
Summary: In this study, a multi-objective optimization-based multi-stand coordinated control strategy and model have been proposed to improve the edge drop in cold rolling of silicon steel strip. The influence of each control stand work roll shifting on edge drop has been analyzed using a finite element model, and the control effectiveness of each work roll shifting actuator has been determined. A fitting model has been proposed to solve the limitation caused by the discrete change of efficiency factors in optimal adjustments. Based on this, a target model for edge drop control and an optimal adjustment model for work roll shifting of each stand have been formulated. A multi-objective optimal model for edge drop control has been established through the overall modeling method, and an improved penalty function algorithm has been developed to calculate the optimal adjustments. Experimental results show that the proposed strategy and model effectively improve the accuracy of edge drop control in silicon steel continuous cold rolling.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Wei Jiang, Kerui Zhu, Jiansheng Li, Wenbo Qin, Jian Zhou, Zhumin Li, Kaixuan Gui, Yu Zhao, Qingzhong Mao, Banglun Wang
Summary: The tensile behavior of cold-rolled 304L stainless steel at room temperature (RT) and liquid nitrogen temperature (LNT) was investigated, revealing that LNT exhibits higher strength and ductility due to the combined effects of high density dislocations, transformation-induced plasticity (TRIP), and delamination toughening mechanism. This study provides insights into the deformation mechanisms and mechanical properties of 92% cold-rolled 304L stainless steel at RT and LNT.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Analytical
Wenchao Li, Dan Li, Zhigang Yu, Yuanlin Xie, Fuhai Liu, Ying Jin
Summary: The finite element method model was developed to study localized corrosion around a MnS inclusion particle in stainless steel. The simulation results revealed the evolution of micro-galvanic corrosion process, starting with MnS dissolution followed by the dissolution of the inclusion and matrix, eventually leading to the matrix as the only corroding phase. Deposition kinetics of corrosion products and pH distribution around the corroding area were also predicted.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Computer Science, Artificial Intelligence
Qinglong Wang, Jie Sun, Yunjian Hu, Wenqiang Jiang, Xinchun Zhang, Zhangqi Wang
Summary: Flatness deviations in the tandem cold-rolling process have a direct impact on product quality and shape. Conventional physics-based numerical models are inadequate for accurately predicting flatness in this complex operating environment. This study proposes a novel approach using deep convolutional neural networks to effectively predict flatness profiles without additional data pre-processing, achieving remarkable predictive performance with fewer model parameters and lower computational complexity.
EXPERT SYSTEMS WITH APPLICATIONS
(2024)
Article
Engineering, Mechanical
Youwei Xu, Binhui Yang, Yu Shi, Xudong Feng, Jipeng Li, Changgen Feng, Korzhyk Volodymyr
Summary: This study analyzes the quality reliability of the flash butt welding joint of a 50JW800 silicon steel strip through metallographic observation, cupping tests, and tensile tests. The insufficient recrystallization and mechanically forced connection in some areas of the joint are identified as issues due to plastic deformation and uneven heat distribution during the FBW process. Eddy current nondestructive testing technology is found to have a good response to different structural characteristics of the joint, making it suitable for ensuring quality reliability in actual production.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Chemistry, Physical
Hyung-Jun Cho, Kyung-Shik Kim, Han-Seop Noh, Sung-Joon Kim
Summary: The effect of cold rolling on hydrogen embrittlement in stable 18Cr-1Mn-11Ni-0.15N austenitic stainless steels was investigated in this study. It was found that the severity of hydrogen embrittlement increased with the degree of cold rolling, due to the generation of deformation twins and increased defect density during the process. The combination of cracks generated at the twin boundaries and promoted hydrogen diffusion led to severe hydrogen embrittlement in the cold-rolled steels.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
K. Bin Tayyab, A. Farooq, A. Ahmed Alvi, A. Basit Nadeem, K. M. Deen
Summary: The study showed that the microstructural and electrochemical properties of 316L stainless steel can be significantly improved by cold rolling and post-rolling heat treatment, leading to lower corrosion current density and higher pitting resistance.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Chemistry, Physical
Jing Zhou, Shengqiang Liu, Baoyu Wang, Hao Xu
Summary: The wear resistance and hardness of stainless steel balls formed by cold skew rolling are improved due to the change in microstructure. A constitutive model based on the deformation mechanism of 316L stainless steel was established and implemented in Simufact to investigate the microstructure evolution during the cold skew rolling process. The simulation and experimental results showed that the established finite element model is credible and can accurately predict the macro dimensions and internal microstructure evolution of small-diameter steel balls during cold skew rolling.
Article
Materials Science, Multidisciplinary
Rui Wang, Zhijie Yan, Jie He, Weihui Fan, Yihong Li, Yong Hu, Yan Kang, Jing Fan, Zhiqiang Yu, Yuhong Zhao, Jurgen Eckert
Summary: The microstructure and mechanical properties of 6Cr13 martensitic stainless steel were studied after cold rolling and subsequent heat treatments. The cold rolling process dissolves and fragments the carbides, resulting in their decreased size. The microstructure is refined and a high density of dislocations is induced by the cold rolling, which persists even after heat treatments. Reversed austenite forms during tempering, resulting in high strength, elongation, and microhardness.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Jun'an Wang, Yongchong Chen, Liangjian Luo, Jichang Chen, Ying He
Summary: The study investigated the effect of cold rolling on the recrystallization texture and ridging of AISI 430 type ferritic stainless steel. Results showed that different cold rolling processes led to varying recrystallization textures and crystal orientations, with two-stage rolling and annealing showing improved ridging resistance.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Materials Science, Multidisciplinary
L. Lemarquis, P. F. Giroux, H. Maskrot, B. Barkia, O. Hercher, P. Castany
Summary: The study found that the microstructure of 316L produced by LPBF technology undergoes different levels of grain refinement and texture changes after cold-rolling, depending on the initial microstructure. Mechanical twinning was also observed in both microstructures, with a twinned surface ratio exceeding 30%.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Lele Liu, Hao Zhang, Hongyun Bi, E. Chang, Moucheng Li
Summary: The microstructure and corrosion behavior of metastable austenitic stainless steel in acidic solution were investigated. Cold rolling deformation increased the martensite content and accelerated the active corrosion rate, while decreasing the pitting potential.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Automation & Control Systems
Luzhen Chen, Wenquan Sun, Anrui He, Chao Liu, Qiang Yi, Jianwei Zhao, Guanyu Zhou, Tieheng Yuan
Summary: This study establishes a multi-pass finite element model based on a 2130 UCM mill to investigate the causes of quarter-wave flatness defect and proposes measures for improvement.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Metallurgy & Metallurgical Engineering
Abdelali Hayoune, Halima Maredj, Jamal Fajoui, Pierre-Antoine Dubos
Summary: The sequence of structural changes in deformed microstructures of austenitic stainless steel subjected to multipass unidirectional cold rolling and two-step cold rolling are studied through dilatometric experiments. The two materials exhibit different dilatometric behaviors, which are confirmed by X-ray diffraction and microhardness measurements. Unusual dilatometric behavior is observed in the material subjected to multipass unidirectional cold rolling, while the material subjected to two-step cold rolling shows a more usual dilatometric behavior with multiple reactions occurring in a specific order.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Ankit Kumar Gupta, Harshal Shahare, Pavan Kumar, Abhay Kumar Dubey, Denis Pustovoytov, Hailiang Yu, Alexander Pesin, Puneet Tandon
Summary: This study investigates the influence of different toolpath methods, approaches, and tool design on the geometrical features and surface quality of the fin formed through the bending mode of the DM process for aluminium alloy Al-6061 T6. The optimal combination of tool profile and toolpath strategy is identified to produce components with better quality in terms of geometrical features and surface roughness.
ADVANCES IN MATERIALS AND PROCESSING TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Hao Gu, Zhide Li, Shilei Liu, Haitao Gao, Charlie Kong, Hailiang Yu
Summary: Commercially pure titanium sheets with high strength and elongation were produced through asymmetric cryorolling and subsequent annealing. The samples treated with asymmetric cryorolling plus annealing showed significant grain refinement and dislocation accumulation, resulting in uniform distribution of dislocations and texture, finer grain sizes, and a higher proportion of high angle grain boundaries. This provided favorable conditions for uniform plastic deformation and yielded similar elongations to failure as the samples treated with room-temperature rolling plus annealing.
Article
Materials Science, Multidisciplinary
Yuexin Zhou, Hanqing Xiong, Jue Jiang, Shisheng Yang, Zeng Tan, Charlie Kong, Hailiang Yu
Summary: To fabricate lightweight components, it is necessary to improve the strength and elongation of AA2024 sheets. In this study, we prepared high-performance AA2024 strips using a combination of (low-temperature pre-aging + cryorolling + aging) processes and investigated their mechanical properties and microstructures. The results demonstrated that the material prepared by this process exhibited an ultimate tensile strength of 631 MPa and 10% elongation could be achieved. The microstructure analysis revealed that pre-aging significantly enhanced the dislocation density (approximately 47.5%) after cryorolling, thereby strengthening the AA2024 sheets through dislocation strengthening mechanism. Moreover, the cryorolled AA2024 sheets exhibited a c-fiber texture resembling asymmetric rolling. The yield strength increment of the material was calculated, and its strengthening source was discussed.
Article
Chemistry, Physical
Shisen Yang, Zhide Li, Yuexin Zhou, Zeng Tan, Charlie Kong, Hailiang Yu
Summary: In this study, AA7075 sheets were processed by cryorolling and room-temperature rolling, followed by aging treatment. The results showed that cryorolled samples had better shape and fewer edge cracks compared to room-temperature rolled samples. The cryorolled samples exhibited significantly higher yield strength and ultimate tensile strength, but lower elongation. After aging treatment, the strength and ductility of the samples were simultaneously improved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Metallurgy & Metallurgical Engineering
Yu-cheng Sun, Yu-hang Huang, Na Li, Xiao Han, Ai-long Jiang, Jin-wu Kang, Ji-wu Wang, Hai-liang Yu
Summary: Numerical simulation is a powerful computational tool for engineering and physical problems. To solve complex problems involving multiple fields, processes, and scales, different computing tools need to be developed. However, the integration of different software is challenging due to the lack of shared or encrypted data formats. This study proposes an image processing-based method for three-dimensional model reconstruction in numerical simulation, which solves the integration problem by using slice or projection images obtained from post-processing modules. The reconstructed models can be directly or indirectly integrated into other software for continued or new numerical simulations. The method has been validated in the simulation of castings, with case studies provided.
Article
Engineering, Manufacturing
Waqas Farid, Thierno Amadou Bah, Charlie Kong, Hailiang Yu
Summary: This study investigates the microstructures and mechanical properties of Al matrix composites (AMCs) reinforced with titanium carbide (TiC) nanoparticles produced by accumulative roll bonding and cryorolling. The results show that the mechanical properties of Al/TiC AMCs improve with the increase of rolling cycles. The presence of TiC in the Al matrix contributes to the enhanced elastic modulus, hardness, yield, and ultimate tensile stress. The dispersion of TiC particles improves with more rolling cycles, resulting in decreased porosity and uniform distribution within the Al matrix, which ultimately enhances the mechanical properties.
MATERIALS AND MANUFACTURING PROCESSES
(2023)
Article
Materials Science, Multidisciplinary
Yuexin Zhou, Hanqing Xiong, Yun Zhang, Charlie Kong, Hailiang Yu
Summary: High-speed underwater friction stir welding (UFSW) was used to weld cryo-and warm-rolled ultrafine-grained AA2024 aluminum alloy sheets composed of high-density nano metastable phase S ' and conventional coarse-grained AA2024-T4 ultra-thin sheets composed of high-density GPB zones. The microstructure of the welded joints was characterized using various techniques, and the results showed that substituting the advancing side (AS) with ultrafine-grained material significantly improved the strength and plasticity of the joint, providing a promising method for low-cost and high-strength connection of aluminum sheets.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Lingling Song, Haitao Gao, Laxman Bhatt, Charlie Kong, Hailiang Yu
Summary: AA1050/AA6061 multilayer composites were processed using a combination of accumulative roll bonding (ARB) and cryorolling, followed by aging treatment. The study analyzed the evolution of microstructure and mechanical properties of the composites. The results revealed that cryorolling improves the mechanical properties by enhancing interfacial flatness, delaying plastic instability, accumulating higher dislocation density, achieving grain refinement, reducing delamination, and promoting bonding interface quality. Cryorolled samples exhibited significantly higher ultimate tensile strength compared to ARBed samples after peak aging. Both ARBed and ARB + cryorolled samples showed optimal performance after aging at 100 degrees C. The increase in ultimate tensile strength in AA1050/AA6061 multilayer composites at peak aging is mainly due to the presence of ultrafine grains and fine precipitates in the AA6061 layer.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Haitao Gao, Shilei Liu, Lingling Song, Charlie Kong, Hailiang Yu
Summary: Cryorolling is used to improve the strength and ductility of copper/brass laminates by creating a multistage heterostructure consisting of ultrafine grains, curved interfaces, shear bands, and deformation twins. Low-temperature annealing further enhances the mechanical properties of the laminates.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Zhide Li, Charlie Kong, Hailiang Yu
Summary: The effect of 1 pct and 10 pct reduction ratios per pass on the microstructure and mechanical properties of high-purity nickel was investigated. The study found that cycle skin-pass rolling resulted in finer grains, higher strength, and elongation compared to conventional rolling. This was attributed to the presence of high dislocation strengthening and a particular dislocation cell structure.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Kaiguang Luo, Gang Lei, Shilei Liu, Charlie Kong, Hailiang Yu
Summary: AlCoCrFeNi high-entropy alloy particles (HEAp)-reinforced aluminum matrix composites (AMCs) were fabricated using stir casting and subsequent cryorolling. The tensile mechanical properties of the HEAp/AMCs were investigated at both room temperature and cryogenic temperature. The study of microstructures showed that the ultimate tensile strength and elongation of the HEAp/AMCs at cryogenic temperature were higher than those at room temperature. The improvement in strengths at cryogenic temperature was attributed to the reinforcement by coefficient of thermal expansion mismatch and dislocation, while the higher elongation was due to the higher length-diameter ratio of the particles in the cryogenic environment.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Review
Metallurgy & Metallurgical Engineering
Hai-tao Gao, Charlie Kong, Hai-liang Yu
Summary: Metal laminates have gained much attention due to the comprehensive advantages of various metals. Roll bonding method, including hot roll bonding, cold roll bonding, accumulative roll bonding, and cryogenic roll bonding, has become one of the main fabrication methods. This article reviews the research progress in the roll bonding of metal laminates, discusses the formation mechanism of bonding interface and the main influence factors on the interfacial bonding quality, and points out further prospects on the advancement of high-performance roll bonding of metal laminates.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Materials Science, Multidisciplinary
Waqas Farid, Zhengyu Wang, Huijie Cui, Charlie Kong, Hailiang Yu
Summary: This study uses accumulative roll bonding (ARB) and cryorolling (CR) processes to create AA1050 composites reinforced with SiCp and TiCp, forming Al-SiCp, Al-TiCp, and Al-SiCp-TiCp composites. Effects of particles and ARB/CR passes on properties are examined. Increased cycles improve microstructure, particle distribution, bonding, and mechanical properties. The composites enhance modulus, strength, and hardness. Optimal composite is selected after comparing results.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jianrui Xing, Gang Lei, Yafei Wang, Laxman Bhatta, Charlie Kong, Hailiang Yu
Summary: This study investigated the effect of pre-cryorolling and room-temperature pre-rolling on the natural aging and bake hardening response of Al-0.92Mg-0.48Si alloy. The results show that both room-temperature pre-rolling and pre-cryorolling can effectively inhibit the adverse effects of natural aging and improve the bake hardening response. Pre-cryorolling with a reduction of 15 pct is found to be the most appropriate pre-deformation procedure for this alloy.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Fei-Long Yu, Charlie Kong, Hai-Liang Yu
Summary: In this study, tensile tests were performed on cryorolled Ti-6Al-4V titanium alloy at temperatures of 760 degrees C and 830 degrees C, with different strain rates. The results showed that the alloy exhibited good low-temperature superplasticity at 760 degrees C and a strain rate of 5 x 10(-4) s(-1), with a fracture elongation of 385%. The lower fracture elongation at 830 degrees C was attributed to grain coarsening and oxidation. The strain rate sensitivity value m of all samples was greater than 0.3, indicating that the cryorolled Ti-6Al-4V titanium alloy with non-equiaxed grain structure can achieve high superplasticity at temperatures lower than 0.5T(m). The main deformation mechanisms in the tensile tests at 760-830 degrees C were found to be grain rotation and grain boundary sliding. Substantial dynamic recrystallization and recovery occurred, leading to an average grain size of less than 5 μm after the tensile tests.