Impact of chromium on the microchemistry evolution during solidification and homogenization of the Al-Mg alloy AA 5052

Engler, Olaf; Kuhnke, Katrin; Westphal, K.; Hasenclever, Jochen

doi:10.1016/j.jallcom.2018.02.125

Cited by 20 publications

(6 citation statements)

References 25 publications

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“…Furthermore, the minor Cr-rich ε-Al18(Cr,Mn)2Mg3 and Al6(Mn,Cr) phases were stable after all heat treatments (Fig. 1c to 1g), which can be attributed to their higher formation temperature and the slow diffusion rate of Cr at high temperatures (D400 °C = 1.29×10 -21 [19,27,28]). Table 3 displays the quantitative results for the area fractions of the major and minor intermetallic phases in the as-cast and heat-treated conditions, showing a general trend of partial dissolution of all intermetallic phases after various heat treatments.…”

Section: As-cast To Heat-treated Microstructural Evolutionmentioning

confidence: 93%

Evolution of dispersoids during multistep heat treatments and their effect on rolling performance in an Al-5% Mg-0.8% Mn alloy

Algendy

Liu

Chen

2021

Materials Characterization

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Section: As-cast To Heat-treated Microstructural Evolutionmentioning

confidence: 93%

Evolution of dispersoids during multistep heat treatments and their effect on rolling performance in an Al-5% Mg-0.8% Mn alloy

Algendy

Liu

Chen

2021

Materials Characterization

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“…These particles are primary intermetallic compounds that “survived” the process of homogenization. EDX analysis showed the presence of aluminum in these alloys, which, however, was a consequence of the influence of the solid solution involved in this research method, as, for example, in [ 33 , 54 , 56 ]. The supersaturated solid solution contained magnesium, which explains strengthening of the solid solution ( Figure 4 ) and the decrease of electrical conductivity ( Figure 5 ).…”

Section: Resultsmentioning

confidence: 99%

Alloying Elements Effect on the Recrystallization Process in Magnesium-Rich Aluminum Alloy

et al. 2022

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This paper addresses the study of the complex effect of alloying elements (magnesium, manganese, copper and zirconium) on changes in magnesium-rich aluminum alloy composition, fine and coarse particle size and number, recrystallization characteristics and mechanical properties. The data obtained made it possible to analyze change in the chemical composition, sizes of intermetallic compounds and dispersoids depending on alloying elements content. The effect of the chemical composition on the driving force and the number of recrystallization nuclei was studied. It was established that the addition of alloying elements leads to grain refinement, including through the activation of a particle-stimulated nucleation mechanism. As a result, with Mg increase from 4 to 5%, addition of 0.5% Mn and 0.5% Cu, the grain size decreased from 72 to 15 µm. Grain refinement occurred due to an increase in the number of particle-stimulated nuclei, the number of which at minimal alloying rose from 3.47 × 1011 to 81.2 × 1011 with the maximum concentration of Mg, Mn, Cu additives. The retarding force of recrystallization, which in the original alloy was 1.57 × 10−3 N/m2, increased to 5.49 × 10−3 N/m2 at maximum alloying. The influence of copper was especially noticeable, the introduction of 0.5% increasing the retarding force of recrystallization by 2.39 × 10−3 N/m2. This is due to the fact that copper has the most significant effect on the size and number of intermetallic particles. It was established that strength increase without ductility change occurs when magnesium, manganese and copper content increases.

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“…Typical for AA5000 series alloys, secondary precipitates of platelet shape were observed in the as-homogenized state. The precipitates most probably belong to the Al 6 Mn phase [59,60,61,62,63]. The platelet thickness ranged from 20 to 210 nm, and length from 70 to 720 nm.…”

Section: Resultsmentioning

confidence: 99%

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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Impact of chromium on the microchemistry evolution during solidification and homogenization of the Al-Mg alloy AA 5052

Cited by 20 publications

References 25 publications

Evolution of dispersoids during multistep heat treatments and their effect on rolling performance in an Al-5% Mg-0.8% Mn alloy

Evolution of dispersoids during multistep heat treatments and their effect on rolling performance in an Al-5% Mg-0.8% Mn alloy

Alloying Elements Effect on the Recrystallization Process in Magnesium-Rich Aluminum Alloy

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

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