Article
Metallurgy & Metallurgical Engineering
X. D. Nguyen, Yu. V. Gamin, T. K. Akopyan, T. Yu. Kin
Summary: The deformation behavior of an Al-6.25Mg-0.27Sc-0.46Mn-0.2Zn alloy was studied. It was found that the yield stress of the alloy is significantly dependent on temperature, but has low strain-rate sensitivity. The deformation activation energy of the alloy was determined and a suitable calculation model was identified.
PHYSICS OF METALS AND METALLOGRAPHY
(2022)
Article
Chemistry, Physical
Lingling Yi, Ge Yu, Ziming Tang, Xin Li, Zhengwei Gu
Summary: In this study, the high-temperature mechanical properties of 5083 aluminum alloy were investigated under different temperature and strain rate conditions using uniaxial tensile tests. The forming process of the high-speed train skin was simulated using the finite element software PAM-STAMP, and the effects of forming method and process parameters on the minimum thickness and springback were analyzed using the Response Surface Methodology. The forming experiment verified the simulation results, with the test part meeting the quality requirements. The mechanical properties of the sheet before and after the HFQ process were examined, showing an increase in yield strength but a decrease in elongation.
Article
Materials Science, Multidisciplinary
Tao Zhang, Junwen Chen, Hai Gong, Yunxin Wu, Tiewen Hao, Xiaofeng He
Summary: The preparation of 2219 aluminum alloy component involves hot/warm forming and subsequent heat treatment, resulting in complex microstructure evolution. Cellular automata (CA) models are used to simulate microstructure during forming and solution treatments. The effect of parameters on the microstructure characteristic is analyzed. The CA models provide guidance for microstructure evolution in aluminum alloy processing.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Haitao Jiang, Hui Xing, Zihan Xu, Bing Yang, Weijun Feng, Tan Sui, Yanfeng Han, Jiao Zhang, Sun Baode
Summary: Hot-forming Quenching (HFQ) can significantly alter the microstructure of high-strength aluminum alloys for car body sheet and achieve desired performance through effective control. Three designed processes, HFQ + Natural Aging (NA) + Simulate Baking (SB), HFQ + Pre-aging (PA) + SB and HFQ + Peak-aging (T6), were systematically studied using HRTEM-SAED to understand the evolution of precipitated phases. The results showed that HFQ + PA + SB had high-density and finely distributed eta' phases, with small and discontinuously distributed grain boundary precipitates. Adjusting the pre-aging temperature and time provided ample nucleation sites for precipitation during the baking stage, ensuring the formation of eta' phases with high quantity density. The end product exhibited a tensile strength of 660.1 MPa and a yield strength of 639.4 MPa, making it a promising material for future car body applications.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Yu Gao, Danqing Feng, Masoumeh Moradi, Chuntian Yang, Yuting Jin, Dan Liu, Dake Xu, Xiaobo Chen, Fuhui Wang
Summary: Three representative Vibrio species exhibit profound inhibitory effect on the corrosion of AA5083 by forming mature biofilms that act as a diffusion barrier to prevent the penetration of corrosive chloride and consume oxygen, thus increasing the passive range and inhibiting localized attack on the surfaces of AA5083.
Article
Materials Science, Multidisciplinary
Zhiqing Hu, Xinchen Li, Guojun Liu, Jia Xi, Lijia Da, Guoren Zhu
Summary: A novel hot gas bulging with clustering balls method (HGBB) was proposed to address the issues of high energy consumption and poor thickness uniformity in traditional hot gas bulging (HGB). By introducing cluster steel balls at specified temperature and pressure, the method improved Vickers hardness and tensile strength, resulting in enhanced alloy strength and the ability to obtain complex shape parts with high strength and high dimensional accuracy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Yan Zhao, Zhen Zhang, Lin Hou, Hailong Cong, Haichao Li
Summary: Rapid-solidified Al-Zn-Mg-Cu alloys show great potential for various applications due to their excellent properties, especially high specific strength. However, their use as advanced structural parts is limited by their intrinsic porosity. In this study, a flow stress subroutine and micropore evolution model were combined to predict the cracking and damage behavior of a rapidly solidified Al-Zn-Mg-Cu disk-shaped part during hot forging. The results showed that the damage to the part during plastic forming is inversely proportional to the relative density. A reasonable matching between the height-to-diameter ratio (H/D) and initial relative density is crucial to avoid cracking and damage. The closure sequence of the micropores was observed from the center to the outside of the billet. It was found that a billet with an H/D of 1 and initial relative density of 0.95 can achieve full density after forming, resulting in a damage-free part. These simulation results were confirmed by analyzing the microstructural characteristics and mechanical properties of the actual forged part.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Physical
Zhihao Du, Zanshi Deng, Xiaohui Cui, Ang Xiao
Summary: Experimental research on the electromagnetic hot forming of 7075-T6 aluminum alloy found that with the increase in temperature, the material's deformation behavior changes, with the forming height being optimal at 400 degrees Celsius, showing improved forming performance.
Article
Automation & Control Systems
Changqing Huang, Zanshi Deng, Xiaohui Cui, Zhihao Du
Summary: This paper introduces a novel forming method, electromagnetic hot forming, to solve the problem of fracture during conventional forming processes of 7075 aluminum alloy. The effectiveness of this method is studied by comparing different methods and analyzing the sheet deformation process. Consistent conclusions are obtained through the comparison of experimental and simulation results.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Automation & Control Systems
Hsuan-Liang Lin, Guan-Ching Chen, Ching-Min Cheng
Summary: The novel plasma-MIG hybrid welding process improves the efficiency and reduces defects in welding aluminum alloy thick plates. The study investigates the effects of different welding parameters on the penetration capability, tensile strength, microstructure, and hot cracking susceptibility. The results show that selecting the appropriate plasma arc current, torch travel speed, and plasma arc argon flow rate significantly affects the welding quality.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Xiaobo Fan, Xugang Wang, Yanli Lin, Zhubin He, Shijian Yuan
Summary: This study analyzed the deformation behavior of an Al-Cu-Mg alloy plate in a hot forming-quenching integrated process and investigated the influence of different temperatures and die clearances on the strengthening behavior. The results showed that adjusting the heating temperature and die clearance can improve dimensional accuracy, and effective quenching can be achieved through water cooling.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Xiangji Li, Meng Xu, Zhiqiang Zhang
Summary: This study investigates the formability and damage evolution of 7075-T6 aluminum alloy at elevated temperatures using the GTN model and hot tensile tests. The results show that the variation in void volume fraction significantly affects the fracture behavior of the material.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Liang Xu, Dayong Zhou, Congchang Xu, Haiyang Zhang, Wenkun Qu, Pengfei Xie, Luoxing Li
Summary: The AA6063 aluminum alloy was subjected to hot compression tests on a Gleeble-3500 thermo-mechanical system to investigate its microstructure evolution mechanism. The results indicated that the microstructure evolution involved dynamic recovery and dynamic recrystallization. The shift from dynamic recovery to dynamic recrystallization occurred at 648 K. Recrystallized grains appeared firstly along the original grain boundaries, then within the grains, suggesting that discontinuous dynamic recrystallization was more likely to occur. A lower strain rate promoted the occurrence of dynamic recrystallization and grain growth. A constitutive model considering dislocation density, dynamic recrystallization fraction, and grain size evolution was established to describe the microstructure evolution, and its accuracy was verified through simulations.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Seung-Yoon Yang, Da-Bin Lee, Kweon-Hoon Choi, Nam-Seok Kim, Seong-Ho Ha, Bong-Hwan Kim, Young-Ok Yoon, Hyun-Kyu Lim, Shae K. Kim, Young-Jig Kim
Summary: The study focuses on the mechanical properties and microstructural changes of the high magnesium content New 5083M alloy during stretch forming. The results show that the 5083M alloy exhibits superior mechanical properties compared to the commercial 5083 alloy at high temperatures, but complex-shaped cavities that may affect mechanical properties appear under high temperature and low strain rate conditions.
Article
Materials Science, Multidisciplinary
Chang-Hee Cho, Dal-Oh Kim, Kwangtae Son, Hyun-Soon Park
Summary: Al-Zn-Mg-Cu alloys exhibit the best mechanical properties among aluminum alloys, but suffer from poor formability during metalworking processes. This study investigates the high-temperature deformation behavior and mechanisms of an Al-Zn-Mg-Cu alloy, highlighting flow instabilities at higher strain rates and cooler temperatures, reduced recrystallization, diminished power dissipation efficiencies, and notable alpha-fiber generation.
JOURNAL OF MATERIALS SCIENCE
(2023)
