The influence of chromium on the structure and superplasticity of Al–Mg–Mn alloys

Portnoy, V.K.; Rylov, D.S.; Левченко, В. С.; Mikhaylovskaya, A. V.

doi:10.1016/j.jallcom.2013.07.075

Cited by 38 publications

(15 citation statements)

References 29 publications

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“…The final grain size decreased from 15 to 5 µm, thereby increasing both yield stress due to Hall–Petch strengthening, and elongation to failure of ~30%, compared to sheets processed with hot rolling. Comparatively large strain at both 200 and 400 °C can intensively refine the secondary precipitates (dispersoids) that were observed in prior studies [73,74,75,76,77,78,79,80]. The fine grain structure observed after thermomechanical treatment, including IMF, can be the result of both the effect of stimulation nucleation by grain boundaries at recrystallization and the stronger Zener drag force.…”

Section: Discussionmentioning

confidence: 75%

Effect of Multidirectional Forging on the Grain Structure and Mechanical Properties of the Al–Mg–Mn Alloy

et al. 2018

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The effect of isothermal multidirectional forging (IMF) on the microstructure evolution of a conventional Al–Mg-based alloy was studied in the strain range of 1.5 to 6.0, and in the temperature range of 200 to 500 °C. A mean grain size in the near-surface layer decreased with increasing cumulative strain after IMF at 400 °C and 500 °C; the grain structure was inhomogeneous, and consisted of coarse and fine recrystallized grains. There was no evidence of recrystallization when the micro-shear bands were observed after IMF at 200 and 300 °C. Thermomechanical treatment, including IMF followed by 50% cold rolling and annealing at 450 °C for 30 min, produced a homogeneous equiaxed grain structure with a mean grain size of 5 µm. As a result, the fine-grained sheets exhibited a yield strength and an elongation to failure 30% higher than that of the sheets processed with simple thermomechanical treatment. The IMF technique can be successfully used to produce fine-grained materials with improved mechanical properties.

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Section: Discussionmentioning

confidence: 75%

Effect of Multidirectional Forging on the Grain Structure and Mechanical Properties of the Al–Mg–Mn Alloy

et al. 2018

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“…In novel alloys, the additions of Sc, as an expensive element, are reduced to 0.1 wt.%, while that of Zr is retained in a higher amount, 0.2 wt.% [ 32 , 49 , 50 ]. The bimodal distribution of the particles in the alloy’s structure provides a high strain rate superplasticity with strain rate sensitivity coefficient m above 0.3 for the AA5XXX- [ 24 , 30 , 51 ], AA7XXX- [ 29 , 30 , 42 , 52 ] and AA2XXX-types [ 27 , 34 ] alloys containing eutectic- and dispersoid-forming Fe [ 24 ], Ni [ 24 , 27 , 29 , 52 ], Ce [ 25 , 27 , 53 ], Y [ 34 ], Er [ 51 ], Mn [ 54 , 55 ], Cr [ 55 ], Zr [ 30 , 56 , 57 ], Sc [ 58 , 59 , 60 , 61 ]. The influence of the eutectic-forming and dispersoid-forming elements on the grain structure and superplastic deformation behavior of Al-Mg-Si type alloys is poorly studied.…”

Section: Introductionmentioning

confidence: 99%

A High-Strain-Rate Superplasticity of the Al-Mg-Si-Zr-Sc Alloy with Ni Addition

et al. 2021

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The current study analyzed the effect of Ni content on the microstructure and superplastic deformation behavior of the Al-Mg-Si-Cu-based alloy doped with small additions of Sc and Zr. The superplasticity was observed in the studied alloys due to a bimodal particle size distribution. The coarse particles of eutectic origin Al3Ni and Mg2Si phases with a total volume fraction of 4.0–8.0% and a mean size of 1.4–1.6 µm provided the particles with a stimulated nucleation effect. The L12– structured nanoscale dispersoids of Sc- and Zr-bearing phase inhibited recrystallization and grain growth due to a strong Zener pinning effect. The positive effect of Ni on the superplasticity was revealed and confirmed by a high-temperature tensile test in a wide strain rate and temperature limits. In the alloy with 4 wt.% Ni, the elongation-to-failure of 350–520% was observed at 460 °C, in a strain rate range of 2 × 10−3–5 × 10−2 s−1.

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“…The AlMg6 alloy belongs to the group of non-heattreatable aluminum alloys of the Al-Mg system. [24][25][26][27][28] The AlMg6 alloy (aluminum alloy 1560 according to GOST 4787-97) incorporates the highest content of magnesium (5.8À6.8 wt %), and it is the highest strength alloy among the alloys of the Al-Mg system. The AMg6 alloy has relatively low strength characteristics in comparison with heat-treatable aluminum alloys; however, unlike the latter, it has good weldability, high ductility and corrosion resistance, especially in marine atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Effect of silicon carbide particles on the mechanical and plastic properties of the AlMg6/10% SiC metal matrix composite

Смирнов

Shveikin

Smirnova

et al. 2018

Journal of Composite Materials

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This work deals with studying the effect of reinforcing SiC particles on the mechanical and plastic properties of a metal matrix composite with a matrix of aluminum alloy AlMg6 (the 1560 aluminum alloy according to the Russian State Standard GOST 4784−97). We assess this effect using the results of mechanical tests at the microscale and macroscale levels. The paper analyzes the fracture mechanism at the microlevel under tensile and compressive stress conditions, as well as the type of contact between the composite constituents. The experimental results obtained for the metal matrix composite are compared with analogous experimental data for the AlMg6 alloy and a compacted material made from the AlMg6 alloy (a compacted powder without addition of SiC reinforcing particles). The studied compacted materials were not previously subjected to extrusion. The tests show a decisive influence of the reinforcing particles on the plastic and mechanical properties of the AlMg6/10% SiC metal matrix composite under compression and tension. For example, the addition of silicon carbide increased the initial yield stress of the compacted material by 26% under tensile tests, and the percentage elongation after fracture was increased up to 1.1%, while it amounted to 0.02% for the compacted material without addition of silicon carbide. Under compression, on the contrary, the addition of silicon carbide degraded plastic properties. As a result, the percentage compression before cracking was 28.4% and 57.9% for the compacted materials with and without addition of silicon carbide, respectively.

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The influence of chromium on the structure and superplasticity of Al–Mg–Mn alloys

Cited by 38 publications

References 29 publications

Effect of Multidirectional Forging on the Grain Structure and Mechanical Properties of the Al–Mg–Mn Alloy

Effect of Multidirectional Forging on the Grain Structure and Mechanical Properties of the Al–Mg–Mn Alloy

A High-Strain-Rate Superplasticity of the Al-Mg-Si-Zr-Sc Alloy with Ni Addition

Effect of silicon carbide particles on the mechanical and plastic properties of the AlMg6/10% SiC metal matrix composite

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