Effect of Fe and Si on the Phase Composition and Microstructure Evolution in Al-2 wt.% Cu-2 wt.% Mn Alloy During Solidification, Cold Rolling and Annealing

Белов, Н. А.; Akopyan, Т. К.; Короткова, Н. О.; Cherkasov, S. O.; Yakovleva, A. O.

doi:10.1007/s11837-021-04907-4

Cited by 5 publications

(4 citation statements)

References 31 publications

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“…It is reasonable to suggest that the P2 peak corresponded to the decomposition of the solid solution and the precipitation of the secondary Mn-rich phases. The temperature of the P2 peak corresponded to the temperature range of Mn-rich phases' precipitation in Al-Mn-based alloys [27,[45][46][47][48][49][50]. For the elemental powders, the P2 peak was not observed after a short milling time of 20 h when the Mn solute content was low, ~0.9 at.%, and the P2 peak was found after 60 h of milling for the sample with ~2.9 at.% Mn solute.…”

Section: Dissolution and Precipitation Effectsmentioning

confidence: 92%

Effect of Mechanical Alloying on the Dissolution of the Elemental Mn and Al-Mn Compound in Aluminum

Yakovtseva,

Emelina,

Mochugovskiy

et al. 2023

Metals

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The grain boundary, solid solution, and precipitation strengthening mechanisms are important for controlling the mechanical properties of Al-based alloys. Due to severe plastic deformation, mechanical alloying refines grain structure to a nanoscale level which leads to a strong increase in solute content and the related strengthening effect of solute atoms and secondary-phase precipitates. This study analyzed the elemental Mn and Al6Mn phase dissolution in Al during high-energy ball milling. For this purpose, XRD data, microstructure, and hardness evolutions were compared for two Al—5.2 at% Mn alloys prepared by mechanical alloying using elemental Al and Mn powders and a pre-melted master alloy. In the two-phase master alloy, containing the Al solid solution and the Al6Mn phase, the strain accumulation, grain refinement, solid solution supersaturation, and milling-induced hardening effects were facilitated. Both elemental Mn and intermetallic compound were dissolved during mechanical alloying, and the maximum solute content was near 3.1 at% Mn. A fine crystalline size of ~25 nm and the maximum Mn solute content were observed after milling of elemental powders and the master alloy for 60 h and 20 h, respectively. The microhardness of ~3 GPa corresponded to a ~3.1% solute Mn content, and the microhardness increased to ~5 GPa after long–term milling due to precipitation strengthening effect of the secondary Al6Mn phase in the master alloy.

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Section: Dissolution and Precipitation Effectsmentioning

confidence: 92%

Effect of Mechanical Alloying on the Dissolution of the Elemental Mn and Al-Mn Compound in Aluminum

Yakovtseva,

Emelina,

Mochugovskiy

et al. 2023

Metals

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“…The alloy of this chemical composition has high strength and ductility, and its processability is higher than that of standard alloys due to the fact that there is no need for any additional heat treatment. The authors of this alloy composition have also studied the possibility of its alloying with Zr [5], Fe and Si [6,7], as well as with Mg and Zn [8].…”

Section: Introductionmentioning

confidence: 99%

Simulation of taper heating and variable pressing rate to improve extrusion performance for high-strength aluminum alloys

Danilin,

Aleshchenko,

Danilin

et al. 2024

Modelling Simul. Mater. Sci. Eng.

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The main process parameters of direct and indirect extrusion of aluminum alloys were studied using FE-modeling in this article. The subject of the study was the use of billets taper heating and variable pressing rate as compared to the standard extrusion conditions. Extrusion of AA2024 grade alloy and experimental Al-2%Cu-1.5%Mn-1%Mg-1%Zn alloy was considered. The flow stress-on-strain dependences within the 350 °C–450 °C range at strain rates of 0.1–10 s−1 were determined for the experimental alloy. Considering the time of billet transportation to the extrusion equipment, its optimum temperature gradient was determined to be 500 °C at the front end and 140 °C at the tail end. Direct extrusion of taper heated billets at the variable rate and elongation of 7 allowed increasing the process performance by 5.6 times (from 1.8 mm s−1 to an average of 10 mm s−1, in case uniformly heated billets are extruded at the constant rate). In case of pressing at high elongations (15 and 25), the performance increase was about 2 times. It was found that the use of taper heating, both in case of grade alloy and model alloy extrusion, in all the considered conditions, allows achieving a significant increase in performance. However, these results are considered to be most effective in case of direct extrusion at small elongation ratios.

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“…Other data [29] suggest that the presence of silicon in an amount of 0.4% in the alloy is su cient for the formation of equal fractions of Mn-containing Al 20 and Al 15 dispersoids and, probably, their re nement which favors strength improvement.…”

Section: Introductionmentioning

confidence: 99%

“…One should however bear in mind the high cost of Sc generally limiting its use as an alloying additive [24,25]. Other works [26][27][28][29] dealt with the effect of Si and Fe on the phase composition of Al-Cu-Mn alloys after different types of deformation and heat treatment. It was found that small additions of those elements (up to 0.4%) favor the precipitation of the Al 15 (Fe,Mn) 2 Si 3 (Al 15 ) and Al 6 (Fe,Mn,Cu) (Al 6 ) phases which decelerate the development of recrystallization processes in the alloy structure during long-term exposure to elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

Optimization of flat rolling parameters for thermally stable alloy of Al-Cu-Mn system with micro additions of Si and Zr

Koshmin,

Cherkasov,

Fortuna

et al. 2023

Preprint

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The phase composition, microstructure and mechanical properties of flat-rolled experimental Al-Cu-Mn system alloy with Si and Zr additions have been studied. The experimental results have been compared with data for the AA2219 commercial alloy pertaining to the same alloying system. Hot deformation of experimental alloy causes the precipitation of ~ 100 nm sized dispersoids and refinement of the eutectic phase particles. The yield strength and relative elongation of the hot-deformed experimental alloy are 255 MPa and 8.6%, respectively. Subsequent cold deformation reduces the relative elongation by 3.5% and increases the yield strength by 50 MPa, while the ultimate tensile strength does not change. After long-term 350°C exposure the mechanical properties of the experimental alloy remain the same as those of the as-deformed one, whereas the yield strength of the 2219 alloy decreases by 2 times and the ultimate tensile strength, by 1.4 times. Comparison of these experimental results with data for the 2219 alloy and other Al-Cu-Mn system alloys cited in this work and reported elsewhere suggests that a good thermal stability of Al-2Cu-2Mn-0.4Si-0.2Zr alloy rolled stock can be achieved by treatment in the regimes designed herein.

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Effect of Fe and Si on the Phase Composition and Microstructure Evolution in Al-2 wt.% Cu-2 wt.% Mn Alloy During Solidification, Cold Rolling and Annealing

Cited by 5 publications

References 31 publications

Effect of Mechanical Alloying on the Dissolution of the Elemental Mn and Al-Mn Compound in Aluminum

Effect of Mechanical Alloying on the Dissolution of the Elemental Mn and Al-Mn Compound in Aluminum

Simulation of taper heating and variable pressing rate to improve extrusion performance for high-strength aluminum alloys

Optimization of flat rolling parameters for thermally stable alloy of Al-Cu-Mn system with micro additions of Si and Zr

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