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Article
Materials Science, Multidisciplinary
Jingyu Jiang et al.
Summary: The tensile behavior of an Al-6.0 Mg-0.4Mn-0.25Sc-0.10Zr alloy was significantly improved at temperatures below freezing point. This improvement is due to the increase in dislocation density and the fraction of low angle boundary angles, resulting in enhanced resistance to dislocation movements and grain boundary strengthening effects. Additionally, cryogenic deformation inhibits dislocation cross-slip, alleviating local stress concentration and leading to a more uniform deformation. At lower temperatures, dislocations tend to accumulate in the grains, causing a change in fracture mechanism from transgranular to intergranular fracture. At -150 degrees C, the alloy exhibits apparent intergranular fracture characteristics.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
L. Zhang et al.
Summary: The study fabricated equiaxed grain structure binary Al-Mg alloys with different Mg contents and grain sizes using friction stir processing (FSP). It was found that the fine grain-structured Al-Mg alloy with high Mg content exhibited higher strength and ductility.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Zeye Chen et al.
Summary: By combining special continuous expansion extrusion forming (CEEF) and various artificial aging treatments, the authors achieved improved mechanical and electrical properties in the Al-Mg-Si alloy conductors. The refined dendrites with high solid solubility in the continuous casted rods and the grain size refinement in the CEEF sheet led to simultaneous improvements in strength and conductivity. Overall, the study presents important strategies for achieving the strength and conductivity trade-off in industrial applications of Al-Mg-Si alloys conductors. Rating: 7/10.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Yinghan Ma et al.
Summary: In this study, the Al-Mg-Si-Fe-Cr alloy was treated with water quenching and air quenching, and the mechanical properties and deformation behavior were investigated under different temperatures and microstructures. The results showed that the water quenched sample had higher yield strength and work hardening rate compared to the air quenched sample, and both samples exhibited improved strength and ductility at low temperatures. Electron back scatter diffraction analysis revealed different grain orientation evolution for the two samples, with the water quenched sample activating two slip systems at low temperature, while only one slip system was activated at high temperature. Transmission electron microscopy examination also indicated that the deformation in the precipitate-free zone was more severe for the air quenched sample at high temperature, while the deformation was more homogeneous for the air quenched sample at low temperature, leading to increased ductility.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Qilei Li et al.
Summary: Strain-induced dislocations introduced by prior deformation can increase the nucleation sites in the matrix, promote the decomposition of supersaturated solid solution and increase the density of Mn-containing dispersoids, resulting in an improved dispersion strengthening effect in non-age hardenable Al alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
W. Xu et al.
Summary: This study successfully addresses the issues of intergranular corrosion and stress corrosion cracking in high Mg-containing Al alloys by fabricating nanostructured Al-5Mg alloy with a high proportion of low angle grain boundaries through dynamic plastic deformation and appropriate annealing. The alloy shows excellent intergranular corrosion resistance and stress corrosion cracking resistance, as well as improved strength and ductility.
Article
Materials Science, Multidisciplinary
Ruiqing Lu et al.
Summary: The cyclical continuous expanded extrusion and drawing process significantly improved the ductility and strength of the Al-3Mg alloy, with multiple passes enhancing the homogeneity of hardness distributions and refining grain size. Continuous dynamic recrystallization played a key role in grain refinement during the process.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Feng Lu et al.
Summary: A modelling framework is presented for understanding the strength and work hardening contributions in age hardened Al-Mg-Si alloys. The model is based on TEM measurements of precipitate lengths and cross sections, as well as stress-strain curves obtained from tensile tests. The presence of precipitates strongly suppresses further work hardening beyond the uniform limit. New models are proposed to describe the work hardening at different aging conditions. The contribution from dislocation loops around non-sheared precipitates is taken into account, but an alternative mechanism suggesting that the precipitates act as obstacles for dislocation motion is also suggested.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
I Vysotskii et al.
Summary: Low-temperature friction-stir welding is successfully used for joining ultrafine-grained Al-Mg-Mn alloy, preserving the microstructure and second-phase particles, and achieving nearly-100% joint efficiency. The deformation behavior and strengthening mechanisms of the welded joints are studied.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Mohammadreza Mofarrehi et al.
Summary: The hot deformation behaviors of Al-Mg-Mn 5xxx alloys with different Mn contents were studied. The peak flow stress gradually increased with an increase in the Mn content due to the strengthening effect of dispersoids. The deformed microstructures were analyzed and the dominant restoration mechanisms were classified based on the Zener-Hollomon parameter.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Ren Jie Dai et al.
Summary: AE alloy and AS alloy were obtained by extrusion and solution treatment of Zn-rich aluminum alloy. AE alloy has fine grains and high precipitate content, while AS alloy has increased grain size and dissolved precipitates. Both alloys show improved mechanical properties, but AE alloy has higher work hardening capacity.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Alen S. Joseph et al.
Summary: Modelling the flow behaviour helps to understand the deformation mechanisms in thermo-mechanical processing. Using a physical model based on dislocation density, the flow stress response of 64.7Ni-31.96Cu alloy with different grain sizes was studied under varying temperatures and strain rates. The model incorporates various factors and addresses recovery during plastic deformation. It predicts the effect of grain size and the amount of twins on flow stress.
PHILOSOPHICAL MAGAZINE
(2022)
Article
Nanoscience & Nanotechnology
Chi Zhang et al.
Summary: The addition of Ce promotes the formation of stacking faults in Al, which has a significant impact on improving the material's performance.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Zhibo Liu et al.
Summary: In this study, a strategy of strengthening Al-10wt%Mg binary alloy via heavy cryogenic rolling at liquid nitrogen temperature was proposed. The combination of cryogenic plastic deformation and a high concentration of Mg solute effectively enhanced the strength and ductility of the alloy, providing a new avenue for non-age-hardened Al-Mg alloys to achieve ultrahigh strength and good ductility.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Kwangtae Son et al.
Summary: This study investigates the effects of Mg and temperature on the cryogenic impact toughness of Al-Mg alloys. The results show that higher temperatures improve the impact toughness in all Al-Mg alloys. However, beyond a Mg content of 6 wt%, the impact toughness decreases with increasing Mg. AA5083 exhibits the lowest impact toughness due to the presence of coarse inclusions.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Zhenzhen Li et al.
Summary: The damping capacity of high Mg alloyed Al-Mg alloy prepared by high strain rate hot rolling and subsequent cold rolling is studied. The results show that the subsequent cold rolling significantly improves the damping capacity of the alloy, which exhibits high strength and excellent high temperature damping. The cold rolled alloy has a special microstructure with high dislocation density, elongated lamellar grains with shear bands, and a high fraction of LAGBs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Yu Wang et al.
Summary: Based on the compositional design concept, a good combination of strength and ductility was achieved in an Al-6 Mg-0.8Mn (-0.2Sc) alloy through hot extrusion deformation. The addition of Sc element resulted in grain refinement and promoted the precipitation of nano-sized Al6Mn phases. The nano-sized Al6Mn phases and Al3Sc dispersoids exhibited a strong pinning effect on the grain boundaries and dislocations, leading to a significant refinement of recrystallized grains. The grain boundary and dislocation strengthening mechanism played important roles in enhancing the yield strength of the alloy. The uniform distribution of solid solution Mg atoms and high recrystallized fraction contributed to the high ductility of the extruded alloy.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Qilei Li et al.
Summary: In this study, friction stir processing (FSP) was applied to an extruded Al-6.0Mg-1.1Mn-0.19Er-0.1Zr alloy, and the subsequent microstructure evolution and mechanical properties were investigated. The results show that FSP is an effective method to refine and homogenize the microstructure, leading to the replacement of coarse band shape grains with fine equiaxial grains. The alloy also showed improved elongation without sacrificing strength, and this can be attributed to the refinement of intermetallic compounds and dispersoids, as well as the suppression of microcrack initiation and propagation.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Bowei Yang et al.
Summary: The microstructural evolution and mechanical properties of Al-Mg alloys with high Mg content during rheo-extrusion were investigated. Equiaxed grains were formed due to the high cooling rate and shear deformation, and continuous dynamic recrystallization contributed to grain refinement. Mg atoms dissolved in the matrix hindered dislocation motion and grain boundary mobility. The rheo-extrusion process improved the ultimate tensile strength and yield strength of Al-Mg alloys by grain boundary strengthening, solid solution strengthening, and dislocation strengthening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Dengshan Zhou et al.
Summary: This study investigates the influence of Mg content and dynamic strain aging (DSA) on the tensile flow behavior of Al-Mg alloys. The results show that the synergistic effect of Mg-dislocation interactions and DSA improves the strain hardening capacity of Al-Mg alloys.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
X. M. Mei et al.
Summary: In this study, a novel solid-state alloying approach was used to fabricate Al-Mg alloys with high Mg contents. The experimental results showed that the degree of alloying increased with the increase of accumulative roll-bonding (ARB) cycles. The as-prepared alloys exhibited enhanced mechanical properties and good intergranular corrosion (IGC) resistance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Bowei Yang et al.
Summary: In this study, the mechanical properties and strengthening mechanisms of a rheo-extruded 5087 alloy processed via accumulative continuous extrusion forming (ACEF) were investigated. It was found that ACEF led to significant grain refinement in the alloy, resulting in improved ultimate tensile strength (UTS) and yield strength (YS). The formation of dislocation cells/walls during deformation promoted the development of low angle grain boundaries (LAGBs), which subsequently transformed into high angle grain boundaries (HAGBs) due to accumulative strain. The presence of nano-sized Al-6(Mn, Fe) phases at the grain boundaries inhibited grain growth.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Matic Jovicevic-Klug et al.
Summary: Deep cryogenic treatment (DCT) is a promising green technology that can modify the properties of metallic materials. This study found that DCT can significantly improve the wear resistance of an Al-Mg-Si alloy without affecting other mechanical properties, due to slight hardness increase caused by microstructural modifications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Industrial
S. Sivasankaran et al.
Summary: The present study investigated the manufacturing of Al-Zn die-casting alloys through liquid metallurgy route and studied their phase composition, microstructures, and mechanical properties. It was found that the Al-20Zn alloy exhibited improved microstructural observation and mechanical properties, making it suitable for die-casting applications.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Min Zha et al.
Summary: This paper focuses on the superplastic response of a high solid solution Al-7Mg alloy processed by equal-channel angular pressing (ECAP) under uniaxial tension. The study reveals that the evolution of microstructural heterogeneities can be regulated to favor superplastic deformation, achieving impressive elongation of approximately 523%. The high superplasticity is attributed to the cooperated mechanism of dislocation slip accommodated by continuous dynamic recrystallization (CDRX) and grain boundary sliding (GBS) during deformation.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Chemistry, Physical
Hyeon-Woo Son et al.
Summary: The effect of Mg content on the dynamic recrystallization behavior during hot deformation of Al-Mg alloys was investigated. The results showed that Mg content affected the strain dependence of dislocation parameters, with higher Mg content increasing the dynamic recrystallization rate and inducing flow softening at relatively low strains.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Min Zha et al.
Summary: The Al-7Mg alloy processed by ECAP demonstrates enhanced thermal stability at moderate to high temperatures, attributed to the multimodal grain structure, strong segregation and/or clusters of Mg solute, and Al3Mg2 precipitates formed during annealing.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Yu-Chih Tzeng et al.
Summary: Through nondestructive testing techniques, the study explored the impact of Mg content on the corrosion and mechanical properties of chill-rolled Al-Mg alloys. Results showed that Mg content affected the conductivity, sound wave velocity, corrosion, and mechanical properties of the alloys. Higher Mg content increased strength and elongation, but also led to a decline in strength within a certain range.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Jonas K. Sunde et al.
Summary: This study investigated the relationship between precipitate microstructure and mechanical properties in age hardenable Al alloys, finding that minor changes in Si, Mg, and Cu content have a significant impact on material properties. Differences in peak strength were observed, with higher yield strength correlating with a refined precipitate microstructure. Furthermore, differences in material ductility were correlated with strength, with significantly overaged conditions leading to large differences in strength and thermal stability.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
D. Xue et al.
Summary: Al-Mg-Mn-Er-Zr alloy produced through a combination of cold rolling and heat treatment has been studied on its microstructure evolution, strengthening mechanism, and corrosion properties. The results demonstrated that the dispersion of coherent Al-3 (Er, Zr) nanoscale particles effectively pinned dislocations and increased the strength, with dislocation strengthening considered as the primary method. The alloy's corrosion resistance decreased after cold rolling, but appropriate processing can improve both mechanical properties and corrosion resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Metallurgy & Metallurgical Engineering
Danielle Cristina Camilo Magalhaes et al.
Summary: The tensile and fracture behaviors of AA6061 alloy at cryogenic temperatures were studied, revealing suppression of PLC and DSA effects at 77K compared to 173K and 298K. The alloy exhibited increased strength, uniform elongation, strain-hardening exponent, etc., at 77K due to reduced dynamic recovery rate.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Materials Science, Multidisciplinary
Jun-Hyoung Park et al.
Summary: The study focuses on producing Al-xMg alloys with high strength and ductility at cryogenic temperatures, achieved through a combination of thermo-mechanical treatment. Gradual addition of Mg significantly improves the cryogenic tensile properties of the alloys. Comparing Al-xMg alloys with different Mg contents provides insights into enhancing these properties for applications at cryogenic temperatures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Zhongping Que et al.
Summary: The study revealed that Mg additions in Al-1.4Fe-0.7Mn-xMg alloys significantly modified the morphology of Fe-containing intermetallic compounds and the heterogeneous nucleation of alpha-Al, leading to refinement of alpha-Al grains. Moreover, the addition of Mg resulted in a change in the major naturally formed oxides from Al2O3 to MgAl2O4, influencing the nucleation process of alpha-Al.
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(2019)
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Mohammad Ali Mostafaei
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