Article
Engineering, Multidisciplinary
Zheng QiuJu, Jiang HongXiang, He Jie, Zhang LiLi, Zhao JiuZhou
Summary: The study found that micro-alloying La addition does not change the overall precipitation sequence and atomic structure of precipitates during artificial aging of Al-Mg-Si alloys. However, the higher La-vacancy binding energy and strong La-Si and La-Mg interactions can decrease the solubility of Si and Mg in the Al matrix, reducing the beta'' precipitation activation energy and improving the strength and electrical conductivity of Al-Mg-Si alloys simultaneously.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2021)
Article
Chemistry, Physical
Aleksey Nokhrin, Iana Shadrina, Vladimir Chuvil'deev, Vladimir Kopylov, Nikolay Berendeev, Artem Murashov, Aleksandr Bobrov, Nataliya Tabachkova, Elena Smirnova, Mikhail Faddeev
Summary: The thermal stability of composite bimetallic wires from five novel microalloyed aluminum alloys with different alloying elements was investigated. The research found that by utilizing specific processing techniques, the wires exhibited high strength and improved thermal stability due to the formation of a uniform microstructure and stabilizing intermetallide nanoparticles.
Article
Nanoscience & Nanotechnology
Ming-Xue Zhang, Cheng Wang, Shao-You Zhang, Xu Liu, Xuan Wang, Ming-Wen Ren, Hui-Yuan Wang
Summary: The addition of trace Zr improves the precipitation kinetics and age-hardening response of Al-Mg-Si alloys. It also refines the Fe-containing phases and grain size. Furthermore, the participation of Zr atoms in Mg-Si precipitates has been observed, leading to enhanced yield strength. Nano-sized (Al, Si)(3)Zr dispersoids also contribute to precipitation strengthening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Ming-Xue Zhang, Hong Ning, Cheng Wang, Kai Guan, Xuan Wang, Zhi-Gang Li, Hui-Yuan Wang
Summary: This study investigates the addition of 0.08 wt% Zr to Al-1.0Mg-1.2Si (6022) alloy and its effects on the solidification process of twin-roll casting (TRC). The addition of Zr promotes the transition from columnar to equiaxed structure and refines the solidification microstructure of the alloy. It also mitigates the macro-segregation during the solidification process of the TRC strip. The incorporation of Zr leads to the formation of (Al, Si)3Zr phases, which act as heterogeneous nucleation sites for α-Al dendrites and π-AlFeMgSi phase. The refinement of the microstructure reduces the secondary dendrite arm spacing and increases the partition coefficients of Mg and Si elements, resulting in the alleviation of central macrosegregation. The mechanical properties of the alloy strips, including fracture elongation and yield strength, are optimized with Zr addition. This work provides a strategy for effectively controlling macro-segregation and producing high-performance alloy strips through the TRC process.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Ming -Le You, Shuo-Min Li, Zhang-Zhi Shi
Summary: This paper develops a new type of aluminum alloy and improves its hardness through laser-aging surface treatment. The alloy exhibits high hardness and improved corrosion resistance. The study also establishes equations to evaluate the contributions of different hardening effects.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Taisiya Ponomareva, Mikhail Ponomarev, Arseniy Kisarev, Maxim Ivanov
Summary: The study successfully expanded the application area of wire arc additive manufacturing method by adding scandium and zirconium to aluminum wire. The maximum yield strength achieved was 268 MPa, ultimate strength was 403 MPa, and plasticity in all specimens was at least 16.0%.
Article
Chemistry, Physical
Zengjie Wang, Xuan Liu, Changwei Zhu, Jilai Xue, Zhichao Guo, Yanan Zhang, Xiang Li
Summary: Scandium and silicon have been found effective for modifying Al-based alloys, but their combined effect is limited due to Si-Sc interaction. This study investigated the microstructure and mechanical properties of Al alloys with different Si and Sc additions. It was found that Sc refines the alpha-Al grain and SiSc2Al2 phases competitively consume the Sc solute, weakening the refining effectiveness. The eutectic Si structure can be refined by Sc, and an appropriate Si to Sc ratio can prevent the formation of SiSc2Al2. Increasing Sc content and decreasing Si content can improve the ultimate tensile strength and yield strength.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Dong Jin, Hongying Li, Changlong Yang, Yu Han, Zhixiang Zhu, Yaojun Miao, Chao Xu, Baoan Chen
Summary: The effects of Mg and Si contents on the microstructure and solidification behavior of dilute Al-Mg-Si alloys were investigated. The results show that the grain size and secondary dendrite arm spacing decrease with the increase in Mg and Si content. The increase in Mg content suppresses the transformation from alpha-AlFeSi to beta-AlFeSi, while the increase in Si content promotes this transformation. Additionally, the Mg/Si ratio influences the formation of the eutectic structure and the type of Fe-bearing phase in it.
Article
Engineering, Manufacturing
Pedro Augusto Bottlender Machado, Jose Maria do Vale Quaresma, Amauri Garcia, Carlos Alexandre dos Santos
Summary: The machinability of Al-Si-Mg alloys under as-cast and heat-treated conditions was investigated. The results showed that the heat-treated alloys exhibited more stable machinability behavior due to improved microstructure and hardness.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Thermodynamics
Marieta K. Zakaryan, Suren L. Kharatyan, Ani Aprahamian, Khachatur Manukyan
Summary: The exothermic reactions in the ZrF4-Mg-Si and ZrF4-Al-Si systems were investigated, revealing considerable differences in combustion characteristics, composition, and morphology. The silicon content governs the phase composition of products, while the combustion temperature determines the phase structures.
COMBUSTION AND FLAME
(2021)
Article
Materials Science, Multidisciplinary
Bernhard Trink, Irmgard Weissensteiner, Peter J. Uggowitzer, Katharina Strobel, Anna Hofer-Roblyek, Stefan Pogatscher
Summary: This study introduces new alloys that combine the age-hardening capability of Al-Mg-Si alloys with the microstructure-controlling effect on processing of primary Fe-rich intermetallic phases used in foil stock. Processing and microstructure-property relations in new crossover aluminum alloys derived from 6xxx and 8xxx foil stock alloys are shown. The study demonstrates the attractive combinations of strength and ductility achieved in these new alloys.
Article
Chemistry, Physical
V. N. Chuvil'deev, M. Yu Gryaznov, S. Shotin, V. Kopylov, A. Nokhrin, C. Likhnitskii, A. A. Murashov, A. A. Bobrov, N. Yu Tabachkova, O. E. Pirozhnikova
Summary: The study investigated the effect of Sc on the plasticity of ultrafine-grained Al-0.5%Mg alloys at elevated temperatures (from 300 to 500 degrees C) and strain rates (from 10(-3) to 10(-1) s(-1)), showing that the addition of 0.4% and 0.5% Sc can achieve high elongation to failure at 500 degrees C and 1.10(-1) s(-1) strain rate.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Materials Science, Multidisciplinary
M. R. Sai Ganesh, Nikhil Reghunath, M. J. Levin, Adarsh Prasad, Sanapala Doondi, Karthik V. Shankar
Summary: This article reviews the development of cast aluminium alloy with highlights on improvement in the morphological, mechanical, tribological, and ageing properties of Sr modified Al-Si and Al-Si-Mg alloys. It discusses the applications of aluminium and its alloys in the automobile and aviation industries, emphasizing on their lightweight and low density benefits. The article also explores the microstructure, hardness, tensile properties, tribological properties, and corrosion behavior by the addition of strontium in these aluminium alloys for future structural application in automobile and lightweight industries.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Zi Yang, Junjie Cheng, Zeqin Liang, John Banhart
Summary: This study explores the effects of two-step preaging at different temperatures and explains the results. It is found that the first step of preaging plays a more important role than the duration suggests, as it strongly influences the subsequent evolution of clusters and vacancies. Two-step preaging achieves a compromise between enhanced natural aging stability and reduced paint-bake hardening.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Chemistry, Physical
L. E. Gorlov, I. S. Loginova, M. V. Glavatskikh, R. Yu. Barkov, A. V. Pozdniakov
Summary: This study investigated the evolution of microstructure, mechanical properties, and electrical conductivity of a novel Al-0.2Y-0.2Sc-0.3Er alloy. It was found that precipitation strengthening mechanism and appropriate processing methods can improve the strength and electrical conductivity of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Ivana Stulikova, Bohumil Smola, Jakub Cizek, Tomas Kekule, Oksana Melikhova, Hana Kudrnova
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Thermodynamics
V. Kodetova, B. Smola, I. Stulikova, H. Kudrnova, M. Vlach, V. Neubert
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2019)
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
Physics, Multidisciplinary
V Kodetova, M. Vlach, J. Cizek, M. Cieslar, L. Bajtosova, H. Kudrnova, M. Leibner, V Sima
ACTA PHYSICA POLONICA A
(2020)
Article
Materials Science, Multidisciplinary
Martin Vlach, Jakub Cizek, Veronika Kodetova, Michal Leibner, Miroslav Cieslar, Petr Harcuba, Lucia Bajtosova, Hana Kudrnova, Tomas Vlasak, Volkmar Neubert, Eva Cernoskova, Petr Kutalek
MATERIALS & DESIGN
(2020)
Article
Thermodynamics
V Kodetova, M. Vlach, H. Kudrnova, J. Malek, M. Cieslar, L. Bajtosov, T. Kekule, P. Harcuba, F. Lukac, M. Leibner
Summary: The influence of cold rolling on thermal and mechanical properties, as well as microstructure observation of cast AlZnMgCu(ScZr) alloys, was investigated, revealing the presence of eutectic phases and various quasicrystalline structures in the materials. The hardening of the alloys was mainly attributed to phase precipitation, with the addition of Sc,Zr stabilizing grains and preventing recrystallization at elevated temperatures.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Veronika Kodetova, Martin Vlach, Hana Kudrnova, Michal Leibner, Jaroslav Malek, Miroslav Cieslar, Lucia Bajtosova, Petr Harcuba, Volkmar Neubert
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2020)
Article
Materials Science, Multidisciplinary
Martin Vlach, Veronika Kodetova, Jakub Cizek, Michal Leibner, Tomas Kekule, Frantisek Lukac, Miroslav Cieslar, Lucia Bajtosova, Hana Kudrnova, Vladimir Sima, Sebastian Zikmund, Eva Cernoskova, Petr Kutalek, Volkmar-Dirk Neubert, Volkmar Neubert
Summary: The study provides a detailed characterization of phase transformations in heat-treated commercial 7075 aluminum alloys with or without low Sc-Zr addition. It is found that the addition of Sc-Zr has a positive influence on the properties of the alloys, including mechanical, electrical, thermal, and corrosion behavior. The strengthening during annealing is caused by the formation of various particles and phases, while the improvement in corrosion properties is attributed to the addition of Sc-Zr.
Article
Chemistry, Physical
Veronika Kodetova, Martin Vlach, Lucia Bajtosova, Michal Leibner, Hana Kudrnova, Jaroslav Malek, Vladimir Mara, Miroslav Cieslar, Sebastien Zikmund
Summary: The addition of Mn, Yb and Zr has a positive influence on grain size in AlYb and AlMnYbZr alloys. Cold rolling results in a deformed structure of the grains with no changes in their size. The precipitation hardening behavior at different temperature intervals was also observed in both alloys after ageing.
Article
Materials Science, Multidisciplinary
Michal Leibner, Martin Vlach, Veronika Kodetova, Hana Kudrnova, Jozef Vesely, Sebastien Zikmund, Jakub Cizek, Oksana Melikhova, Frantisek Lukac
Summary: The effect of cold-rolling and high-temperature aging on precipitation processes in an Al-Er-Zr alloy was investigated. Based on the results, the decomposition sequence of the supersaturated solid solution was proposed. Cold-rolling enhances the precipitation of Al3Er particles and accelerates the formation of the Zr-rich shell around the Er-rich core. The coherency strain-field around the precipitates is retained even after 4 hours of aging at 600℃.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Michal Leibner, Martin Vlach, Veronika Kodetova, Jozef Vesely, Jakub Cizek, Hana Kudrnova, Frantisek Lukac
Summary: The development of microstructure in an Al-Sc-Er-Zr alloy during aging at 600 degrees C was investigated. It was found that Sc atoms segregate at dislocations, and two different structures of precipitates were observed.
Proceedings Paper
Engineering, Mechanical
Xiao Zhang, Yuanding Huang, Veronika Kodetova, Martin Vlach, Norbert Hort
Summary: The influence of different alloying elements on the electrical resistivity of binary magnesium alloys was investigated. It was found that Gd had the largest influence on resistivity, while Zn had the lowest. Heat treatments and isothermal aging showed that resistivity increased with T4 treatment and decreased with aging due to the depletion of solute atoms and the formation of intermetallic phases. A phenomenological formula was used to describe the relationship between resistivity and the volume fraction of precipitates, allowing resistivity to be used as a quantification of precipitation kinetics in binary magnesium alloys.
MAGNESIUM TECHNOLOGY 2022
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Veronika Kodetova, Martin Vlach, Hana Kudrnova, Michal Leibner, Jaroslav Malek, Petr Harcuba, Vladimir Sima
28TH INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS (METAL 2019)
(2019)
Proceedings Paper
Materials Science, Multidisciplinary
Michal Leibner, Martin Vlach, Veronika Kodetova, Miroslav Cieslar, Hana Kudrnova, Vladivoj Ocenasek, Neubert Volkmar, Neubert Volkmar-Dirk
28TH INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS (METAL 2019)
(2019)
