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)
Article
Materials Science, Multidisciplinary
Jie Tang, Jinhai Wang, Jie Teng, Guan Wang, Dingfa Fu, Hui Zhang, Fulin Jiang
Summary: Increasing Zn content in Al-Zn-Mg-Cu alloys accelerates work hardening rate but has a mixed effect on peak stress and hot deformation activation energy. Dynamic softening increases gradually with higher Zn content due to accelerated dynamic precipitation, while it decreases with low Zn content as dynamic recovery and recrystallization are hindered by Zn addition.
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)
Article
Nanoscience & Nanotechnology
Hamid Ghorbani, Roohollah Jamaati
Summary: In this study, a high-strength and high-toughness Al-Zn-Mg-Cu/pure Al laminated composite with a heterogeneous microstructure was manufactured using the compression bonding process. The four-layer sample showed strong bonding between layers and exhibited significantly increased strength and toughness compared to the as-received alloy. On the other hand, the three-layer sample had weak bonding between layers and showed a large extent of delamination. Both samples displayed a heterogeneous fracture behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Liying Cui, Zhan Zhang, X. -Grant Chen
Summary: This study investigated the microstructural evolution and mechanical properties of five lightweight Al-Cu-Mg-Zn entropy alloys. The alloys exhibited lightweight characteristics and multiphase features. With increasing Cu and other element contents, the volume fraction of intermetallic compounds (ICs) increased, leading to improved yield strength (YS) and reduced plasticity. Alloy 5 (Al77Cu17Zn3Mg2Cr1) showed the highest YS at room temperature and retained the highest YS at 300 degrees C after thermal exposure, making it promising for elevated-temperature applications.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Yuming Xie, Xiangchen Meng, Ranzhuoluo Zang, Yuexin Chang, Long Wan, Yongxian Huang
Summary: Deformation-driven modification was utilized to exploit the microstructural potential of lightweight high-entropy alloys, achieving high strength and ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Menghan Zhang, Chengbo Li, Yong Zhang, Shengdan Liu, Jingyu Jiang, Jianguo Tang, Lingying Ye, Xinming Zhang
Summary: The study found that the alloy after hot deformation has a different microstructure compared to the one without hot deformation, with more recrystallized grains and subgrains, accompanied by a higher amount of quenching-induced phases. Furthermore, it was observed that hot deformation has a significant impact on the microstructure and precipitation behavior of the alloy.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Mingdong Wu, Daihong Xiao, Xinkai Wang, Lanping Huang, Wensheng Liu
Summary: The effects of Zn contents on the mechanical properties, corrosion behaviors, and microstructural evolution of extruded Al-Li-Cu-Mg-Ag alloys were investigated. Increasing Zn contents can accelerate hardening kinetics, improve hardness, and enhance corrosion resistance. The addition of 0.57 wt.% Zn to the alloy showed the best combination of tensile strength and corrosion resistance.
Article
Materials Science, Multidisciplinary
Yan Zou, Xiaodong Wu, Songbai Tang, Qianqian Zhu, Hui Song, Mingxing Guo, Lingfei Cao
Summary: The study investigated the effects of Zn/Mg ratios on the microstructure and mechanical properties of Al-Zn-Mg-Cu alloys aged at 150 degrees C. It was found that an increase in Zn/Mg ratios significantly accelerates the aging process, with the co-existence of T' phase and eta' phase beneficial to the high strength of the alloys.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Yong Li, Yin Wang, Bing Lu, Wei Yu, Haiyao Wang, Guangming Xu, Zhaodong Wang
Summary: Al-Zn-Mg-Cu alloys were prepared using water-cooled copper casting and characterized by various microstructural analysis techniques. The study demonstrated that increased Cu content enhanced solid solution strengthening and precipitation strengthening, while higher Zn/Mg ratio decreased precipitation strengthening and resulted in decreased strength but increased plasticity of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
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
Nanoscience & Nanotechnology
Yasin Alemdag, Sadun Karabiyik, Anastasia V. Mikhaylovskaya, Mikhail S. Kishchik, Gencaga Purcek
Summary: The hypoeutectic Al-7Si based alloy containing Zn and Cu was severely deformed using multidirectional forging (MDF) process at 200 degrees C in this study. The MDF process led to a refinement in alpha-Al grains and hard particles of crystallization origin, and also provided a method for formation of secondary precipitates within the alloy's microstructure. It was determined that MDF increased the tensile properties of the alloy but decreased its hardness, while converting brittle type fracture of homogenized alloy to ductile type.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Zhaorui Zhang, Yue Li, Hongxiang Li, Di Zhang, Jishan Zhang
Summary: This study achieves an excellent strength-ductility combination in a high Cu-concentration crossover alloy and investigates the effect of high Cu concentration on its mechanical property and microstructure evolution.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Z. Ma, J. D. Robson
Summary: Al-Zn-Mg-Cu alloys achieve high strength mainly through precipitation strengthening. This study investigated the coupling of dislocation and precipitation strengthening in pre-aged AA7075 alloys to achieve strengths greater than those obtained with heat treatment alone. The results showed that deformation introduced sufficient dislocations for work hardening and post-ageing at 120 degrees C was effective in promoting precipitation strengthening. The time required to reach peak strength is determined by the competition between precipitation kinetics and dislocation recovery.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Rensong Huang, Hongfu Yang, Peng Sun, Shanju Zheng, Mengnie Li, Yonghua Duan
Summary: This study investigated the influence of Mg content on the microstructure and corrosion behavior of homogenized Al-Zn-Mg-Cu alloys. The findings showed that alloys with moderate Mg content exhibited significantly lower corrosion rate and depth. These findings are important for enhancing the corrosion resistance of the alloys.