Article
Materials Science, Multidisciplinary
Hanfang Dai, Guofu Xu, Yao Li, Guangyi Guo, Xiaoyan Peng
Summary: The effects of electropulsing frequency on the creep age formability, mechanical properties, and corrosion behavior of 7050 aluminum alloy were studied. Higher frequency electropulsing improved the alloy's creep age formability, mechanical properties, and corrosion resistance.
MATERIALS CHARACTERIZATION
(2022)
Article
Optics
Wei Guo, Hao Wang, Guangzhi He, Peng Peng, Dongsheng He, Guofeng Han, Jianfeng Yan
Summary: This study investigated the effects of NLSP and FLSP on 7050 aluminum alloy and compared the results. It was found that both NLSP and FLSP can produce similar surface improvement effects near the impacted surface. However, NLSP leads to a slow decrease in hardness and residual stress in the internal parts, while FLSP preserves the internal microstructures and properties.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Physical
A. L. M. Carvalho, L. B. Renaudin, A. J. Zara, J. P. Martins
Summary: In this study, DSC and TEM analyses were conducted to investigate the density and morphology of precipitates in the 7050 aluminum alloy under different conditions. The results showed that the RRA treatment resulted in a higher density of fine shear-resistant precipitates distributed uniformly in the aluminum matrix. On the other hand, the T6I4-65 treatment generated a lower density of larger shear-resistant precipitates. Therefore, the RRA treatment may have a beneficial effect on the correlation between yield strength and ductility in the 7050 aluminum alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Zou Linchi, Cheng Jiale, Wang Wenlong, Wang Chen, Wang Bingshu, Chen Junfeng
Summary: The size of precipitates has a significant impact on the stress relaxation behavior of 7050 aluminum alloy, affecting the relaxation rate and limit, and hindering dislocation motion. Additionally, there is a threshold stress phenomenon present in the age-forming process, with the threshold stress increasing as the precipitates size increases.
RARE METAL MATERIALS AND ENGINEERING
(2021)
Article
Engineering, Industrial
Zbigniew Gronostajski, Karol Jaskiewicz, Pawel Kaczynski, Mateusz Skwarski, Slawomir Polak, Jakub Krawczyk, Wladyslaw Chorzepa, Przemyslaw Trzpis
Summary: This work investigates the feasibility of producing B-pillars using the 7075 aluminum alloy. Through material tests, heat treatment, and stamping tests, a product with appropriate strength was successfully manufactured.
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2022)
Article
Metallurgy & Metallurgical Engineering
Hui Shi, Yuanding Huang, Lixiang Yang, Chunquan Liu, Hajo Dieringa, Chong Lu, Lv Xiao, Regine Willumeit-Roemer, Norbert Hort
Summary: This study investigates the creep behavior and microstructural evolution of sand-cast Mg-14Gd-0.4Zr alloy using compressive creep tests. The results show that the coherent distribution of beta' and beta' (F) phases effectively impedes dislocation movement and enhances creep resistance. However, with increasing creep time, the fine precipitate chains coarsen and transform into different phases, leading to stress concentration and increased creep strain.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Engineering, Mechanical
V. K. Yadav, V. Gaur, I. V. Singh
Summary: The corrosion-fatigue behavior of friction stir welded AA2024-T3 in a 3.5% NaCl solution was investigated. Corrosion-damage analysis revealed that the heat-affected zone in the shoulder-affected region was more susceptible to corrosion attack due to microstructural coarsening. A mechanism was proposed for the microstructural evolution in the shoulder-affected zone. A significant reduction in the fatigue life of the welded component was observed in the 3.5% NaCl solution compared to laboratory air, attributed to pit formation caused by the dissolution of Al-matrix near intermetallic particles.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Review
Chemistry, Physical
Ling Liu, Cuilin Fan, Hongying Sun, Fuxiao Chen, Junqing Guo, Tao Huang
Summary: This paper reviews the development of Alumina-Forming Austenitic (AFA) stainless steel and introduces its characteristics and composition design methods. It analyzes the influence of alloy elements and heat treatment process on the performance of this steel. Additionally, the corrosion resistance, mechanical properties, and creep properties of AFA steel are analyzed, and future research directions are explored.
Article
Materials Science, Multidisciplinary
Da Zhang, Jihong Dong, Jiangtao Xiong, Nan Jiang, Jinglong Li, Wei Guo
Summary: The microstructure and corrosion behavior of 7050 aluminum alloy RFSSW joint were investigated, revealing that the continuous degree of intergranular nano-precipitates is the key factor affecting corrosion susceptibility.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Tomoyuki Fujii, Tatsuro Sawada, Yoshinobu Shimamura
Summary: This study aims to investigate the nucleation processes of transgranular stress corrosion cracking in aluminum alloy 6061-T651 immersed in NaCl solution. The corrosion phenomena were analyzed based on precipitates, the location and geometry of corrosion pits and cracks, and the crystal orientation where cracking occurred. The results showed that corrosion pits formed on a smooth surface, and stress corrosion cracks tended to originate from deeper pits with high stress/strain concentration along the {1 1 2} crystal plane.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Hanqing Xiong, Yuexin Zhou, Peng Yang, Charlie Kong, Hailiang Yu
Summary: The effects of cryorolling and room temperature rolling on mechanical properties of 7050 aluminum alloy were investigated. Aging treatment can improve the elongation of the alloy, but other mechanical properties decrease with increasing aging time. Cryorolling is beneficial for improving the corrosion resistance of the aged samples.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
D. W. Ding, Jing Tan, A. H. Cai, Y. Liu, H. Wu, Q. An, P. W. Li, Yan Zhang, Qing Yang
Summary: This study systematically investigated the effects of Ti microalloying on the glass forming ability, physical, and chemical properties of Zr-based bulk metallic glasses. It was found that the addition of 0.3at% Ti had the greatest impact on the glass forming ability and mechanical properties. Ti lowered the glass transition temperature, increased plasticity and strength, and influenced the corrosion behavior, leading to increased pitting corrosion severity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Mingtao Wang, Liwei Wang, Wendi Yang, Yuxi Liu, Herman Terryn, Zhongyu Cui
Summary: The effect of bisulfite (HSO3-) on the stress corrosion cracking (SCC) behavior of 7050-T7451 aluminum alloy in the presence of Cl- in a thin electrolyte layer environment is investigated. The addition of HSO3- inhibits corrosion initiation but promotes corrosion propagation and hydrogen uptake. Quantitative calculation demonstrates that HSO3- significantly facilitates the synergistic effect among stress, corrosion, and hydrogen, causing a shift in the controlling step of SCC from corrosion-induced hydrogen to mechanical-electrochemical-hydrogen interactions. The buffer effect of HSO3- plays a dominant role in the HSO3--induced acceleration of SCC degradation.
Article
Materials Science, Multidisciplinary
Lu Wen, Wencai Liu, Guohua Wu, Henglong Wu, Liang Zhang, Jiangwei Sun, Jinshuo Zhang, Shihao Xu, Chunchang Shi, Yongbo Wang, Yejun Lu
Summary: The addition of 0.15 wt% Cr can improve the comprehensive performance of the Al-6.5Zn-2Cu-1.5 Mg-0.05Ti alloy, reducing stress corrosion cracking susceptibility index by 82%, increasing elongation by 42%, with a slight decrease in strength.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Hanqing Xiong, Yuexin Zhou, Charlie Kong, Hailiang Yu
Summary: A novel retrogression and re-aging regime was proposed to achieve a combination of mechanical and corrosion properties for 7050 alloy. Increasing the retrogression heating rate resulted in smaller precipitate size and narrower precipitation free zones, leading to improved mechanical properties but reduced corrosion resistance of the alloy. By controlling the retrogression heating rate at 3°C/min, a good combination of strength and corrosion resistance could be achieved for 7050 alloys.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Jun Liu, Jianying Zhang, Chao Lei, Yanhong Liu, Xiaguang Sun, Wenting Tang
Summary: The fracture mechanism of NbTi alloy during plastic deformation was studied and simulated experimentally, revealing a typical microvoid coalescing ductile fracture. The GTN damage model was used to predict the damage behavior in the multipass bundle-drawing process of NbTi/Cu multifilament composite wire, with calibrated damage parameters.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Engineering, Industrial
Heng Li, Liwen Zhang, Guangyao Chen, Jun Ma, Dong Wei, Tianjun Bian, Jinchao Yang, Changhui Wu, Heng Yang
Summary: The study explores the physical mechanisms of time-dependent springback in high-strength titanium tubular materials during bending, and develops a Viscoelastic-Kelvin constitutive model for accurate prediction. The findings clarify the effects of time-dependent springback on spatial multi-bending components, aiding in achieving higher precision manufacturing of high performance tubular components.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
C. H. Wu, H. Li, T. J. Bian, C. Lei, L. W. Zhang
Summary: This study deepy explored the natural aging behaviors and underlying mechanism of the 2195 Al-Cu-Li alloy. Results indicate that the alloy exhibits a strong response in the early stage of natural aging, with the tensile strength rapidly increasing after 4 hours and reaching a plateau after 24 hours. The contribution of solute atoms, delta'/beta' precipitates, and GP zones to strength in the natural aging state is similar, at around 161 MPa, 80 MPa, and 141 MPa, respectively.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Jing Wang, Yongqing Zhao, Qinyang Zhao, Chao Lei, Wei Zhou, Weidong Zeng
Summary: Understanding the deformation and fracture mechanisms of metastable beta titanium alloys is crucial for improving their formability and service life. Through a comprehensive analysis, this study reveals the different roles of various phases in the equiaxed microstructure and identifies the factors that contribute to damage, such as shear bands and microvoids. The findings also shed light on the pathways of crack propagation.
Article
Materials Science, Multidisciplinary
Jing Wang, Yongqing Zhao, Qinyang Zhao, Chao Lei, Wei Zhou, Weidong Zeng
Summary: The impact toughness of a high-strength metastable beta titanium alloy with two typical microstructures (bimodal and lamellar) was studied. It was found that the lamellar microstructure exhibited better impact toughness due to the coordinated deformation of alpha and beta phases, the presence of deformation twins, and the zigzag propagation path.
Article
Physics, Applied
Lanfang Jiang, Xiaohui Tao, Yaochen Lin, Zili Wang, Shuyou Zhang, Heng Li, Yi He
Summary: High-strength galvanized steel has the advantages of high strength, lightweight, and high reliability. However, the forming process often leads to defects, especially springback, which significantly affects the forming quality. This study utilized ABAQUS software to construct a three-dimensional finite element analysis model of the roll forming process for a hat-shaped section. Different base-level roll forming methods were simulated to improve the formation quality and precisely control the springback angle of high-strength galvanized steel.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2022)
Article
Engineering, Mechanical
Duo Zhang, Heng Li, Xiaoxi Guo, Yanfeng Yang, Xudong Yang, Zhenyong Feng
Summary: This study investigates the influence of size effect on the fracture of cross-scaled components and focuses on Inconel 718 superalloy cross-scaled foils. Through experiments and modeling, the fracture mechanism and the relationship between fracture strain, fracture stress, and t/d are revealed. In addition, a fracture threshold scattering model considering random textures is established, providing a theoretical basis for the process design of cross-scaled components.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Chemistry, Physical
Zhiwei Yang, Heng Li, Yanhong Zhang, Xin Liu, Qingfei Gu, Yuli Liu
Summary: This study utilized equal channel angular pressing (ECAP) to refine the grain of NiTiNb alloy and revealed the mechanism of how grain boundaries affect the shape memory properties. It was found that by tailoring the type and distribution of specific grain boundaries through the design of ECAP, better shape memory characteristics can be achieved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Mengmeng Liu, Yuli Liu, Heng Li
Summary: The deformation behavior of ferrite in a low carbon Al-killed steel sheet was investigated, and it was found that ferrite exhibits different slip behaviors and slip transfer during deformation. The evolution of grain boundaries is the main deformation feature for ferrite polycrystals.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Zhiwei Yang, Heng Li, Yanhong Zhang, Xin Liu, Qingfei Gu, Yuli Liu, Jingchao Yang
Summary: This study found differences in the mechanical properties and shape memory properties of hot-forged NiTiNb alloys in the axial and radial directions. While the axial samples showed higher elongation rates, the radial samples exhibited better shape memory properties. The types of stress-induced martensite variants differed between the two directions, but the recoverable transformation strains were the same.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Qingfei Gu, Heng Li, Zhiwei Yang, Yanhong Zhang, Xin Liu, Guangjun Li
Summary: In this study, NiTiNb alloy was prepared using Laser Solid Forming (LSF) technology, and the microstructure and phase transformation temperature were investigated. The results showed that an appropriate combination of LSF process parameters can achieve good metallurgical bonding. Laser power, grain size, and proportion of equiaxed crystals have an impact on the phase transformation temperature. Additionally, heat treatment can enhance the phase transformation temperature and hysteresis.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Manufacturing
Tian-Jun Bian, Heng Li, Chao Lei, Chang-Hui Wu, Li-Wen Zhang
Summary: Electrically assisted creep aging (ECA) is a promising forming technology for integral panels, which can achieve a three-step aging process (RRA) to tailor the needed properties balance.
ADVANCES IN MANUFACTURING
(2022)
Article
Nanoscience & Nanotechnology
Liwen Zhang, Heng Li, Tianjun Bian, Changhui Wu, Chao Lei
Summary: This study investigates the mechanical properties and microstructural evolution of high-strength and high-ductility creep-aged alloys under plastic loading. The alloys exhibit high yield strength and ductility due to the combined effect of high dislocation density, dense distribution of fine T1 precipitates, and narrowed precipitate free zones at grain boundaries. The shearing of T1 plates occurs as single shearing steps at different locations, inducing high ductility during plastic deformation. The good mechanical properties of the alloys under plastic loading are less sensitive to aging time, widening the process window of creep age forming.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
C. H. Wu, H. Li, T. J. Bian, C. Lei, Y. F. Yang, L. W. Zhang
Summary: In this research, a suitable natural aging regime for creep age forming of Al-Cu-Li alloy (2195) was obtained. The creep deformation of the alloy increases with increasing natural aging time, but reaches a stable value after 24 hours. The natural aging also improves the mechanical properties of the alloy, increasing yield strength and tensile strength, but reducing ductility.
MATERIALS TODAY COMMUNICATIONS
(2023)