Article
Materials Science, Multidisciplinary
O. Sitdikov, E. Avtokratova, M. Markushev
Summary: The study revealed that the grain refinement of Al-Mg-based alloy during multidirectional isothermal forging occurs through continuous dynamic recrystallization controlled by nanosized precipitates, resulting in the formation of (ultra) fine grain structure.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Yuqiao Sun, Yuhong Luo, Qinglin Pan, Bing Liu, Liang Long, Weiyi Wang, Ji Ye, Zhiqi Huang, Shengqian Xiang
Summary: The addition of Sc element in Al-Zn-Mg-Cu-Zr alloy contributes to significant grain refinement, increased strength and hardness, as well as improved resistance to corrosion, with lower tendency and slower rates of corrosion observed.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Mikhail S. Kishchik, Andrey G. Mochugovskiy, Maxence Cuda, Anna A. Kishchik, Anastasia V. Mikhaylovskaya
Summary: The influence of the fraction of coarse undeformed particles on the microstructure evolution and mechanical properties of alloys processed by isothermal multidirectional forging (MDF) was investigated. Al-Mg-Ni-Sc-Zr-based alloys with different Ni concentrations and a fraction of Al3Ni particles were subjected to MDF at 350 degrees C. The results showed that the Al3Ni phase particles stimulated the nucleation of recrystallized grains and contributed to the formation of an ultrafine-grained structure, resulting in improved mechanical properties.
Article
Multidisciplinary Sciences
Yu Wang, Baiqing Xiong, Zhihui Li, Yong'an Zhang, Haitao Teng
Summary: The precipitation behavior of Al-3(Sc,Zr) particles in a high-alloyed Al-Zn-Mg-Cu-Zr-Sc aluminum alloy during homogenization was investigated. It was found that Al3Sc was the precursor of Al-3(Sc,Zr) precipitate. The process of Al3Sc nucleus transforming to mature Al-3(Sc,Zr) particle was controlled by diffusion, with Zr atoms diffusing over long distance to form a Zr-rich shell around Al3Sc nuclei. The Al-3(Sc,Zr) precipitates showed much better thermal stability compared to Al3Sc particles.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Metallurgy & Metallurgical Engineering
Wen Kai, Li Xi-wu, Xiong Bai-qing, Liu Hong-lei, Wang Ying-jun, Li Zhi-hui, Zhang Yong-an, Li Ya-nan
Summary: In this study, scandium was added to an Al-Zn-Mg-Cu-Zr alloy, and the effects of different scandium contents on the microstructure of the alloy were investigated. The results showed that scandium addition can refine the grain size and reduce the content of the AlZnMgCu eutectic phase.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Materials Science, Multidisciplinary
Ji Ye, Qinglin Pan, Bing Liu, Zhiqi Huang, Shengqian Xiang, Longfeng Qu, Weiyi Wang, Xiangdong Wang
Summary: The quenching sensitivity of an Al-Zn-Mg-Cu alloy is mainly influenced by the precipitation of coarse eta phases during slow quenching, which increases with the size and quantity of the coarse eta phases. Two-stage aged samples exhibit lower quench sensitivity due to the reduced transformation rate from eta ' phases to eta phases after slow quenching.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Jiwu Huang, Chenglong Xu, Shichao Liu, Fuqing Jiang
Summary: This paper investigates a novel Al-Zn-Mg-Cu-Mn-Sc-Zr alloy with excellent quenching sensitivity and a quench-hardening depth of more than 150 mm. Different quenching rates affect the hardness of the alloy, and after artificial aging, various precipitates are observed on the grain boundaries and different phase interfaces.
Article
Materials Science, Multidisciplinary
Yunlong Ma, Yuanchun Huang, Xieyi Zhang
Summary: The study focused on the precipitation thermodynamics and kinetics of the second-phase in the quenched Al-Zn-Mg-Cu-Sc-Zr-Ti alloy. It was found that the eta' phase is the dominant strengthening phase, although it can increase electrical conductivity at high temperatures, it also reduces hardness.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Yongtao Xu, Zhifeng Zhang, Zhihua Gao, Yuelong Bai, Purui Zhao, Weimin Mao
Summary: Increasing the alloying element content in the alloy results in finer grain size, changes in grain morphology, increase in eutectic phase, improved mechanical properties but significantly reduced elongation.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Evgenii Aryshenskii, Maksim Lapshov, Jurgen Hirsch, Sergey Konovalov, Viacheslav Bazhenov, Alexander Drits, Denis Zaitsev
Summary: This research focused on the effects of adding Sc and Zr to Al-Mg-Si alloys on the microstructure in the as-cast condition. It was found that the chemical composition has a significant impact on grain size, which can decrease significantly with certain additive combinations. Different alloy systems require varying concentrations of additives and dissolution temperatures for Mg2Si, affecting the efficiency of heat treatment.
Article
Materials Science, Multidisciplinary
Chenglong Xu, Jiwu Huang, Fuqing Jiang, Yingge Jiang
Summary: The hot deformation behavior of a novel Sc, Zr alloyed Al-Zn-Mg-Cu alloy was studied, showing that as lnZ decreased, dislocation density decreased and the dynamic recrystallization mechanism changed.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Zhaocan Li, Guoqin Wu, Yunfang Liu, Jianmin Yu, Zhimin Zhang
Summary: The effects of hydrostatic pressure on grain refinement and deformation behaviors of Mg-13Gd-4Y-2Zn-0.5Zr alloy were investigated. It was found that the increase in hydrostatic pressure leads to an increase in equivalent stress, forming load, and stress triaxiality. However, hydrostatic pressure has little effect on dynamic recrystallization fraction and grain size, except for a slight increase in DRX fraction under higher hydrostatic pressure.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Metallurgy & Metallurgical Engineering
S. H. Wen, H. J. Jiao, L. G. Zhou, Q. S. Zhang, S. J. Wu
Summary: The Al-Mg-Sc-Zr alloy was welded using different weld filler wires, showing that the addition of Sc, Zr, and TiB2 can refine the grain and improve the mechanical properties of the welded joint. The increase in Sc/Zr and TiB2 additions leads to higher tensile strength and elongation, but slightly decreases the impact toughness.
WELDING IN THE WORLD
(2022)
Article
Materials Science, Multidisciplinary
Martin Vlach, Jakub Cizek, Veronika Kodetova, Tomas Kekule, Frantisek Lukac, Miroslav Cieslar, Hana Kudrnova, Lucia Bajtosova, Michal Leibner, Petr Harcuba, Jaroslav Malek, Volkmar Neubert
Summary: The precipitation reactions of Al-3.4% Mg-2.7% Zn-0.80% Cu-0.10% Fe-0.05% Si alloy with and without Sc and Zr additions were investigated. The addition of Sc and Zr microalloying elements resulted in substantial grain refinement and the formation of secondary Al-3(Sc,Zr) particles, improving the thermal stability of the alloy.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Siyue Fan, Xuming Guo, Qingwei Jiang, Zhenhua Li, Jing Ma
Summary: This article focuses on a new Al-Cu-Mn-Ti-Zr aluminum alloy fabricated by pulsed gas metal arc additive manufacturing to refine the microstructure and alleviate the mechanical property anisotropy. The investigation shows that T6 heat treatment significantly improves the mechanical properties of the alloy samples, but the formation of pores reduces the elongation.
Article
Chemistry, Physical
M. H. Abbasi, R. Tavakoli, S. G. Shabestari
Summary: The correlation between atomic-scale structure and glass-forming ability of ternary bulk metallic glasses was investigated using molecular dynamics simulation. It was found that the potential energy of the icosahedra reflects the geometric ordering, while the virial stress energy density reveals the chemical ordering. Based on this discovery, a new prediction criterion for glass-forming ability was proposed and validated using experimental data.
Article
Chemistry, Physical
Haimin Zhai, Shuai Cui, Sheng Li, Dongqing He, Bo Cheng, Xinjian Zhang, Wensheng Li, Zhornik Viktor, Uladzimir Seniuts
Summary: Laser shock peening (LSP) treatment significantly affects the phase structure and properties of titanium-based BMG materials, promoting rejuvenation and introducing heterogeneity. This leads to improved plasticity and resistance to crack propagation. LSP-1 specimen exhibits higher hardness and plasticity, reducing fatigue peeling wear caused by brittleness. However, excessive LSP results in increased susceptibility to pitting and significantly reduces tribocorrosion resistance.
Article
Chemistry, Physical
Olga A. Blatova, Maria A. Solodovnikova, Ekaterina M. Egorova, Vladislav A. Blatov
Summary: This study applied a universal geometrical-topological approach to analyze the crystal structures of intermetallic compounds deposited in the Inorganic Crystal Structure Database. By exploring the local atomic configurations, they identified different types of coordination polyhedra and proposed criteria for determining geometric instability. This research provides useful indicators for checking crystallographic information and validating structural models.
Article
Chemistry, Physical
Jose M. Torralba, Diego Iriarte, Damien Tourret, Alberto Meza
Summary: The amount of globally recycled e-waste is less than 20% of the total produced. One of the causes for this low recycling rate is the complex and expensive selective sorting of metals. However, recent research has shown that high entropy alloys (HEAs) can be made from complex alloy mixtures, reducing the dependence on pure critical metals. It has been demonstrated that e-waste can be used to produce competitive HEAs.
Article
Chemistry, Physical
M. Y. He, Y. F. Shen, N. Jia, W. Y. Xue, J. P. Li
Summary: This study successfully improved the mechanical properties of high-entropy alloys (HEAs) through phase decomposition modulation, achieving strengthening of low-cost CuFeMnNi HEAs. The annealed HEAs exhibited excellent mechanical properties, with significantly increased yield strength and maintained satisfactory elongation.
Article
Chemistry, Physical
D. V. Louzguine-Luzgin, F. R. Pratama
Summary: In this study, the growth rate of a crystalline phase in the Al-Fe-Mn-Si metallic glass was measured in real time using transmission electron microscopy. The effective diffusion coefficient related to the slowest diffusing element (Mn) was estimated. The results showed that the growth rate of the crystalline phase was significantly faster compared to pure Al and AlFe compound.
Article
Chemistry, Physical
Zhenhua Han, Yubo Tian, Jun Yang, Jianzhao Li, Jinyang Zhang, Gang Liu, Ran Wei, Guojun Zhang
Summary: In this study, a novel medium-entropy alloy (MEA) (Fe65Ni15Cr10Co10)92Ti5Al3 with a dual heterogeneous structure was developed by adding Ti and Al to a previously reported Fe65Ni15Co10Cr10 MEA. The MEA exhibited ultra-high ultimate tensile strength and work hardening extent at room temperature. The addition of Ti and Al induced precipitation and resulted in a continuous FCC -> BCC martensitic transformation and a transformation-induced plasticity effect. The excellent mechanical properties of the alloy were attributed to the synergistic effects of hetero-deformation induced strengthening, precipitation strengthening, and TRIP.
Article
Chemistry, Physical
S. Y. Liang, L. T. Zhang, B. Wang, Y. J. Wang, E. Pineda, J. C. Qiao
Summary: This study focuses on the influence of the thermomechanical protocol on the aging or rejuvenation of glass by decoupling the thermal and mechanical processes. The results show that Labased metallic glass exhibits material hypomnesia, with a clearer rejuvenation trend observed after imposing increasing amplitude strain oscillations. There is a threshold value of the oscillation amplitude that separates the effects of the protocol into acceleration of aging or rejuvenation. This study reveals the correlation between the thermomechanical properties of metallic glass and the previous application of strain oscillations of various amplitudes, providing an effective tool for regulating the structural state of metallic glasses through a simple-operated method.
Article
Chemistry, Physical
Chihui Liu, Hua Zhang, Qing Wang, Panzhi Wang, Jiadian Yang, Fanchao Meng, Xin Zhou, Lilong Zhu, Shangzhou Zhang, Liang Jiang
Summary: Thermal deformation behavior and microstructure evolution of GH141 alloy were efficiently studied using high-throughput double-cone gradient compression. Different compression temperatures resulted in a wide gradient equivalent strain distribution and gradient microstructure. The dynamic recrystallization mechanism shifted towards discontinuous dynamic recrystallization with increasing compression temperature.
Article
Chemistry, Physical
D. Dubaux, J. Zollinger, M. -C. de Weerd, J. Ghanbaja, S. Mathieu, S. Migot, P. Boulet, S. Sturm, V. Fournee, M. Sicot, J. Ledieu
Summary: We report the formation of large and highly twinned dendrites of the Al13Fe4 approximant phase embedded in an fcc Al-rich matrix. Using a rapid cooling technique, the approximant appears as a 10-fold dendrite. The grain distributions within the arm are complex and a single dendrite arm can contain up to four different orientations. Three types of twins, namely {100}, {001} and {201} twins, have been identified. A growth mechanism involving heteroepitaxial growth from a decagonal Al-Fe quasicrystalline seed is proposed to explain the formation of these specific 10-fold motifs.
Article
Chemistry, Physical
Ming Yang, Yibo Zhang, Jie Dong, Yan Huang, Zhichao Lu, Liang Wang, Xuerui Wei, Zhengdong Fu, Jinkui Zhao, Wenli Song, Wei Li, Yuntao Liu, Dong Ma
Summary: A multi-element microalloying strategy has been used to improve the microstructure and mechanical properties of CuZr-based bulk metallic glass composites. Microalloying effectively refines the CuZr phase and results in finely dispersed B2 crystallites embedded in the BMG matrix, leading to the formation of centimeter-sized BMGCs with good mechanical properties.
Article
Chemistry, Physical
Xuejie Zhu, Xuexi Zhang, Mingfang Qian, Ziyi Wang, Aibin Li, Zongning Chen, Muhammad Imran, Lin Geng
Summary: The homogeneous superelastic behavior in shape memory alloys (SMAs) is crucial for their functional and structural fatigue properties, as well as their stable elastocaloric effect (eCE). In this study, a Ti-22Nb-4Zr-2Ta plate was prepared with a strong recrystallized texture, resulting in a completely recoverable superelastic strain and narrow hysteresis. The observation of strain and temperature evolution revealed the importance of diffuse transformation and favorable texture in achieving mesoscopically homogeneous transformation and related elastocaloric effect.
Article
Chemistry, Physical
Mohammad Navazani, Sitarama Raju Kada, Daniel Fabijanic, Matthew Barnett
Summary: This study investigates the effect of Cu and Al addition on an alloy containing multiple principal elements. The results show that adding small amounts of Cu can improve the alloy's ductility and the hardness of the FCC phase can be predicted using a hybrid model. Unlike previous studies, the corrosion resistance of the alloy is not affected by Cu addition, indicating its potential for further development into a fine-grained stainless steel alloy.
Article
Chemistry, Physical
Fatemeh Azizian, Homam Naffakh-Moosavy, Fatemeh Bagheri
Summary: Novel biodegradable Zn-xCu-0.8Mn-0.4Ag alloys were prepared in this study, and the effects of Cu addition and hot extrusion process on microstructure, mechanical properties, and cytotoxicity of the alloys were investigated. The results showed that adding copper and performing a hot extrusion process can significantly improve the mechanical properties of the alloys, making them potential candidates for cardiovascular stents.
Article
Chemistry, Physical
Ivan A. Ditenberg, Denis A. Osipov, Ivan Smirnov, Konstantin V. Grinyaev
Summary: This study investigates the effect of high-temperature annealing on the structural-phase state and microhardness of Ni3Al samples obtained by spark plasma sintering after high-energy ball milling. The results show that certain annealing temperatures promote grain growth and high-density nucleation, leading to the formation of a fine-grained structural state. The study also analyzes the influence of annealing temperature on the strengthening mechanisms.