Article
Engineering, Manufacturing
Emir Hodzic, Josef Domitner, Angela Thum, Arash Shafiee Sabet, Nino Muellner, Werner Fragner, Christof Sommitsch
Summary: The formability of 1.0 mm-thick Al-Mg-Si alloy blanks with different Si and Mg contents was investigated numerically and experimentally using two deep drawing tools. The study found that increasing Si and Mg contents can increase the maximum drawing depth or blankholder force, but lubrication has a more significant influence on the formability of the alloy blanks.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Materials Science, Multidisciplinary
G. Y. Zheng, X. Luo, Z. D. Kou, B. Huang, Y. Q. Yang
Summary: This paper systematically investigates the microstructural evolution of Al-Zn-Mg-Cu alloy during ultrasonic surface rolling process. The results show that the microstructural evolution at different depths of the surface deformation layer is basically the same but faster closer to the surface. The basic microstructural evolution order of the alloy includes scattered dislocation, dislocation cells, elongated dense dislocation cell walls, thick laminated structure, and nanolaminated structure. The study provides a theoretical basis for adjusting the actual processing technology.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
V. A. Esin, L. Briez, M. Sennour, A. Koster, E. Gratiot, J. Crepin
Summary: The precipitation map of Al-Cu-Mg alloy (AA2024-T3) was obtained by combining differential scanning calorimetry analysis and high-resolution transmission electron microscopy observations, revealing the appearance of equilibrium S-Al2CuMg phase at 85 degrees C after 1000 h of ageing. Hardness values showed that the maximum hardness was located at the boundary between S-phase + GPB zones and S-phase regions for all studied temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Yuan Yin, Bing-Hui Luo, Zhen-Hai Bai, Hui-Bo Jing
Summary: The quench sensitivity of Al-Cu-Mg alloy was examined at different thicknesses of the thick plate. A finite element analysis was used to simulate the quenching process, and the resulting time-temperature-property and time-temperature-transformation curves were obtained through hardness tests and differential scanning calorimetry. Microstructural observation was conducted using scanning electron microscopy and transmission electron microscopy. The experimental results showed that the quench cooling rate decreases from the surface to the center of the plate, leading to inhomogeneous microstructure and a decrease in S-phase and an increase in T-phase, which was consistent with the analysis of the time-temperature-property and time-temperature-transformation curves.
Article
Nanoscience & Nanotechnology
Sang-Hwa Lee, Jae-Gil Jung, Sung-Il Baik, David N. Seidman, Min-Seok Kim, Young-Kook Lee, Kwangjun Euh
Summary: The research revealed that the formation and evolution of GPI and GPII zones during natural aging had a significant impact on the mechanical properties of the Al-7.6Zn-2.7Mg-2.0Cu-0.1Zr-0.07Ti alloy. The Zn/Mg atomic ratio, mean radius, number density, and volume fraction of the GP zones also played crucial roles in influencing the mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Jian Wang, Jingpei Xie, Douqin Ma, Zhiping Mao, Tingting Liang, Puyou Ying, Aiqin Wang, Wenyan Wang
Summary: The effect of deep cryogenic treatment (DCT) on the aging behavior and tensile properties of Al-Cu-Mg-Ag alloy was investigated. The results showed that DCT of the alloy induced plastic deformation and high-density dislocations in the a-Al matrix. These dislocations cut second-phase particles, reducing the size of c1 precipitates and increasing their number density, thereby mitigating the adverse effects of DCT on the tensile properties of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Hongmei Jin, Di Tie, Renguo Guan
Summary: This study investigates the re-precipitation behavior of Al-Mg-Si-Cu alloy at the atomic scale, revealing the beneficial effects of re-precipitation on electrical conductivity and mechanical properties. Additionally, a unique L phase precursor was discovered.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Y. F. Wu, Y. M. Zhong, W. Xu, X. Y. Li
Summary: In this study, a nanolaminated structure with an average lamellae thickness of 27 nm and a high hardness of 2.86 GPa has been successfully fabricated in a solution treated Al-Zn-Mg-Cu alloy by surface mechanical grinding treatment (SMGT) at room temperature. The nanolaminated structure exhibits strong Zn and Cu segregation to grain boundaries, and the thermal stability is attributed to the grain boundary segregation and the pinning effect of numerous nanoparticles.
Article
Chemistry, Physical
Fei Liu, Zhiyi Liu, Guangyu He
Summary: The microstructure evolution and its effect on the strength properties and fatigue performance of the Al-Cu-Mg alloy have been investigated. The results show that refining Goss-oriented grains can improve the strength-ductility trade-off and reduce the fatigue crack propagation rate.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Kaiyun Xiang, Lipeng Ding, Zhihong Jia, Xiaofang Yang, Qing Liu, Zhang Hao
Summary: The phase transition of the eta-MgZn2 Laves phase from C14 to C15 structure in peak aged Al-Zn-Mg-Cu alloy was studied using atomic resolution high-angle annular dark-field scanning transmission electron microscopy (HAADFSTEM) and density functional theory (DFT) calculations. The formation of a well-ordered C15 structural MgZn2 as an independent precipitate was observed for the first time in the alloy. The C15 structure was found to be transformed from the C14 structure through synchroshear activation and was associated with the formation of twin-like structures and five-fold symmetry twins.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
X. W. Wang, W. Wang, W. Chen, D. M. Chen
Summary: The study found that the weight loss rates of alloys in NaCl solution increase with the addition of In and at higher water temperatures, with the alloys exhibiting the highest weight loss rates at 70 degrees C and 90 degrees C. Electrochemical measurements were conducted to study the corrosion behavior of Mg-Al-Cu-In alloys, and the reasons for the different corrosion behaviors were discussed.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
J. G. Jeon, Sangjun Lee, K. M. Choi, H. Kang, W. C. Kim, J. H. Jeon, D. H. Bae
Summary: The recrystallization behavior of cold-rolled Al-Zn-Mg-Cu-based alloy sheets was studied, and it was found that the grain size decreased with increasing Cu and Mg contents due to the reduced ratio of microscale particle size to volume fraction. The sensitivity of different particles to particle-stimulated nucleation (PSN) varied depending on their morphologies and relative fractions. The addition of Cu and Mg had different effects on the PSN, resulting in different linear experimental coefficients (k).
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Hongfu Yang, Yelin Zhang, Shanju Zheng, Zaki I. Zaki, Rensong Huang, Shumeng Lu, Peng Sun, Mohamed M. Ibrahim, Hua Hou, Mengnie Li, Xiaohong Yuan, Xiaojing Wang, Zeinhom M. El-Bahy
Summary: This article investigates the dissolution behavior of the MgZn2 phase in Al-Zn-Mg-Cu alloy and finds that it can be completely dissolved under specific heat treatment conditions. By establishing a dissolution model and fitting experimental results, better control over the size, quantity, and dispersion of precipitates in the alloy can be achieved, thus improving its mechanical properties.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Article
Chemistry, Physical
Pan Deng, Wenfeng Mo, Zuoqiong Ouyang, Junwei Chen, Binghui Luo, Zhenhai Bai
Summary: In this study, the effects of adding Zr to Al-3.8Cu-1.2Mg alloys on microstructural evolution, intergranular corrosion, electrochemical corrosion, and chemically-milled surface roughness were investigated. The experimental results showed that the addition of 0.2 wt% Zr could refine the grain size, improve solidification segregation, increase the spacing of grain boundary precipitation phases, enhance corrosion resistance, and optimize the chemically-milled surface roughness. This finding provides a valuable strategy for achieving high corrosion resistance and superior chemically-milled surface roughness properties in aircraft skin materials for the aerospace field.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
M. R. Gazizov, A. N. Belyakov, R. Holmestad, M. Yu. Gazizova, V. S. Krasnikov, P. A. Bezborodova, R. O. Kaibyshev
Summary: The deformation behavior of {111}Al omega plates in an Al-Cu-Mg-Ag alloy was analyzed using atomic-resolution scanning transmission electron microscopy (STEM). The transition from particle shearing to Orowan dislocation loop formation was observed at critical plate thicknesses of 3 and 3.5 cθo (2.54-2.97 nm) when considering the omega phase as consisting of the orthorhombic theta lattice (θo). For thinner plates, a full dislocation allowed particle segments to shift relative to each other in planes orthogonal to the particle habit plane. Thicker plates exhibited dislocation loops consisting of two segments with jogs, causing particle segmentation and deviation from the Al/omega orientation relationship.