Article
Materials Science, Multidisciplinary
Zhiping Wang, Mingliang Wang, Yugang Li, Hongyu Xiao, Han Chen, Jiwei Geng, Xianfeng Li, Dong Chen, Haowei Wang
Summary: The study introduces a new approach of pretreatment before hot-working Aluminum alloys fabricated by spray forming, which enhances the microstructural stability and mechanical properties significantly by introducing Al3Zr particles and optimizing precipitates.
MATERIALS & DESIGN
(2021)
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
Physics, Applied
Xuewei Fang, Jianye Guo, Yanmei Yang, Qiaoling Zheng, Bin Liu, Bo Yan, Yefei Li
Summary: The mechanical and thermodynamic behaviors of intermetallics in Al-Zn-Mg-Cu alloys were investigated using first-principles calculations. The studied second phases exhibited excellent thermodynamic stability indicated by negative values of formation enthalpy and cohesive energy. Al3Er_D022 demonstrated the most significant metallic nature, while Mg2Si showed the least metallicity. TiAl3 had the highest bulk, shear, and Young's moduli. The mechanical anisotropic behaviors followed the trend: MgZn2>Al3Er_D0(22)>Al3Sc_D0(22)>TiAl3>Al3Sc_D0(23)>Al3Er_D0(23)>Al3Er_L1(2)>Al3Sc_L1(2)>Mg2Si, with MgZn2 being the most mechanically anisotropic phase. The calculated room temperature linear thermal expansion coefficient values ranged from 10.2x10-6 K-1 to 21.2x10-6 K-1, with Al3Er_L1(2) having the highest value (17.3x10-6 K-1) followed by Al3Sc_L1(2) (15.5x10-6 K-1); both of which were close to that of the Al matrix, indicating relatively lower thermal misfit.
MODERN PHYSICS LETTERS B
(2023)
Article
Materials Science, Multidisciplinary
Lin Hou, Shu Guo, Shanguang Liu, Pei Wang, Yan Zhao, Haichao Li
Summary: In this study, the effect of trace Sc on the mechanical property and high-temperature creep performance of the spray-deposited Al-Zn-Mg-Cu alloy was investigated. The addition of Sc significantly refined the microstructure of the alloy and decreased the area fraction of precipitates at grain boundaries. This resulted in improved mechanical property and high-temperature creep resistance, which can be attributed to the formation of fine and dispersed Al3(Sc, Zr) secondary phase particles.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Kaiyun Xiang, Xiuchuan Lei, Lipeng Ding, Zhihong Jia, Xiaofang Yang, Qing Liu
Summary: The effect of homogenization and warm-rolling on the mechanical properties of an Al-based alloy fabricated by spray forming technology was studied. The results showed that the combination of these two processes significantly improved the mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Rensong Huang, Mengnie Li, Hongfu Yang, Shumeng Lu, Hanning Zuo, Shanju Zheng, Yonghua Duan, Xiaohong Yuan
Summary: Increasing Mg content in the as-cast Al-Zn-Mg-Cu alloys leads to higher amounts of nonequilibrium eutectic structures and tertiary dendrites in the a(Al) matrix. Additionally, the crystallization temperature range decreases with increasing Mg content.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Zhengping Lu, Yunze Jiang, Lihua Yu, Junhua Xu, Jingdun Peng, Kaiyun Xiang
Summary: Both Sc-added and Sc-free Al-Zn-Mg-Cu aluminum alloys were prepared by spray forming and their microstructure evolution and mechanical properties were studied. Scandium addition enhanced the effects of grain strengthening, dislocation strengthening, and precipitation strengthening. At different aging temperatures, the presence of scandium affected the precipitation of MgZn2 phase and significantly influenced the yield strength of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Yifu Jiang, Siyang Xu, Shuang Gao
Summary: The influence of initial alloy temper on corrosion resistance for Al-Zn-Mg-Cu alloy was investigated. The results showed that specimens after pre-ageing and simulated baking treatment exhibited high strength and improved inter-granular corrosion resistance.
Article
Materials Science, Multidisciplinary
Yaocheng Zhang, Li Yang, Lianbei Sun, Yingying Zhang, Song Pang, Tao Meng
Summary: The microstructure of spray deposited and extruded Al-Zn-Mg-Cu alloy after regression re-aging treatment was investigated. The main precipitate phases were short rod-shaped eta', coarse rod-shaped h and G.P. zones. The mechanical properties were influenced by strain rate and sample thickness, which determined the yield and ultimate tensile strength of the alloys. The alloy exhibited mixed-mode fracture and strain hardening was conducted by deformation texture.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
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
Sung-Jae Won, Hyeongsub So, Leeseung Kang, Soong Ju Oh, Kyou-Hyun Kim
Summary: High-strength Al-Zn-Mg-Cu-based alloys (7xxx series) are developed by optimizing the Mg/Cu content and adding trace amounts of Sc. The improved mechanical strength is attributed to nanoscopic structural distortion caused by excessive solutes of Mg and Cu, as well as grain refinement induced by Sc microalloying.
SCRIPTA MATERIALIA
(2021)
Article
Engineering, Manufacturing
Yang Wenjing, Ding Hua, Li Jizhong
Summary: Friction stir processing (FSP) is an effective technique for microstructural refinement, but the weak area in the thermo-mechanically affected zone (TMAZ) has limited its practical application. The introduction of double-sided FSP (DFSP) aims to eliminate this weak zone and improve mechanical properties. Research shows that DFSP can ensure a refined and homogeneous microstructure without TMAZ, leading to enhanced mechanical properties in the alloy plates.
MATERIALS AND MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Multidisciplinary
Rensong Huang, Hongfu Yang, Shanju Zheng, Mengnie Li, Hui Wang, Yonghua Duan, Chongfeng Yue, Chun Yang
Summary: The evolution mechanism of the second phase in the homogenization process of Al-Zn-Mg-Cu aluminum alloy was thoroughly investigated. The results revealed that the phase transition of Mg(Zn, Cu, Al)2 to S(Al2CuMg) occurs due to the interdiffusion between Zn and Al atoms at the interface during homogenization at 420 degrees C for 15 to 30 min. Additionally, the dissolution of S(Al2CuMg) into the Al-matrix is governed by the interdiffusion of (Mg, Cu atoms) and Al atoms. Notably, the 0(Al2Cu) phase plays a crucial role as an intermediate transition phase facilitating the dissolution of S(Al2CuMg) into the Al-matrix.
MATERIALS & DESIGN
(2023)
Article
Nanoscience & Nanotechnology
Pu Zhou, Yanli Song, Jue Lu, Lin Hua, Wenlin Wu, Qian Sun, Jianjun Su
Summary: A novel fast-aging process, a two-step aging coupled deformation process, was proposed to address the challenge of obtaining high strength and aging efficiency in precipitation-hardened aluminum alloys. The influence of fast-aging parameters on the mechanical behavior of Al-Zn-Mg-Cu alloy was studied, and the mechanisms for the improved strength and reduced aging time were analyzed and verified.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
P. Emadi, B. Andilab, K. Borodianskiy, C. Ravindran
Summary: The use of lightweight alloys, such as magnesium, is crucial for improving fuel efficiency and reducing emissions in automobiles, as well as increasing the range of electric vehicles. This study investigated the effects of SiC nanoparticles on the microstructure and mechanical properties of Mg-Al-Zn-Mn alloy composites. The addition of SiC resulted in significant grain refinement, more uniform phase dispersion, and improved tensile strength, making it a promising material for strengthening light alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
