Influence of cold rolling on the precipitation in an Al–Mn–Zr alloy

Karlı́k, Miroslav; Vronka, Marek; Haušild, Petr; Hájek, Michal

doi:10.1016/j.matdes.2015.07.023

Cited by 11 publications

(5 citation statements)

References 11 publications

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“…The fine precipitation phase produces age strengthening, prevents the migration of dislocations, and thus increases the strength of the alloy, which is one of the ways to improve the properties of the alloy [9,10]. Many researchers have studied the relationship between the size of the precipitated phase and its mechanical properties [11].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Precipitation in 7055 Aluminum Alloy by Laser Ultrasonics

Zhu

Peng

et al. 2021

Metals

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After different rolling conditions, four 7055 aluminum alloy samples with different precipitation sizes were measured by scanning electron microscope, transmission electron microscope and laser ultrasonic. The attenuation coefficients of ultrasound measured by laser ultrasonic were calculated in the time domain, frequency domain and wavelet denoising, respectively. The relationship between the precipitate size and attenuation coefficient was established. The results show that the attenuation of the ultrasonic wave is related to the size of the precipitated phase; this provides a new method for rapid non-destructive testing of the precipitation of aluminum alloys.

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Section: Introductionmentioning

confidence: 99%

Characterization of Precipitation in 7055 Aluminum Alloy by Laser Ultrasonics

Zhu

Peng

et al. 2021

Metals

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“…• C and soaking at this temperature, the conductivity slightly increases due to clustering of solute elements [20]. During the next stage, associated with heating to 450…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, the fine particles form during precipitation annealing from the solid solution. According to transmission electron microscopy observations on a similar alloy without Zn [20] it follows that during the first step of the precipitation annealing at 250…”

Section: Resultsmentioning

confidence: 99%

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Influence of zinc addition on the precipitation in Al-Mn-Zr alloys

Karlı́k¹,

Vronka²,

Haušild³

et al. 2018

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Two Al-Mn-Zr alloys produced by twin-roll casting having almost the same chemical composition except for the content of zinc (0.10 and 1.66 wt.%, respectively) were investigated. Precipitation reactions during two-step annealing were examined by means of electrical conductivity and differential scanning calorimetry. Furthermore, SEM quantitative particle analysis, energy dispersive spectroscopy, and electron backscattered diffraction were carried out. The results show that 1.1 to 1.8 wt.% of zinc enters into constituent Al15(Mn,Fe)3Si2 phases and that zinc improves nucleation of small Al(Mn,Fe)Si particles, 20 to 100 nm in size, which is beneficial for the recrystallization resistance of the alloy.K e y w o r d s : Al-Mn-Zr alloys, Zn addition, microstructure, SEM quantitative particle analysis, phase analysis

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“…Aluminum-manganese alloys are frequently used in industrial applications. Their mechanical properties are affected by addition of Fe and Si, which form together with Mn coarse primary particles during solidification or secondary particles during thermal treatment [ 1 , 2 ]. Recovery and recrystallization processes which determine the high temperature mechanical properties can be significantly influenced by the addition of small amounts of Zr.…”

Section: Introductionmentioning

confidence: 99%

High Temperature Deformation of Twin-Roll Cast Al-Mn-Based Alloys after Equal Channel Angular Pressing

2015

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Twin roll cast Al-Mn- and Al-Mn-Zr-based alloys were subjected to four passes of equal channel angular pressing. The resulting grain size of 400 nm contributes to a significant strengthening at room temperature. This microstructure is not fully stable at elevated temperatures and recrystallization and vast grain growth occur at temperatures between 350 and 450 °C. The onset of these microstructure changes depends on chemical and phase composition. Better stability is observed in the Al-Mn-Zr-based alloy. High temperature tensile tests reveal that equal channel angular pressing results in a softening of all studied materials at high temperatures. This can be explained by an active role of grain boundaries in the deformation process. The maximum values of ductility and strain rate sensitivity parameter m found in the Al-Mn-Zr-based alloy are below the bottom limit of superplasticity (155%, m = 0.25). However, some features typical for superplastic behavior were observed—the strain rate dependence of the parameter m, the strengthening with increasing grain size, and the fracture by diffuse necking. Grain boundary sliding is believed to contribute partially to the overall strain in specimens where the grain size remained in the microcrystalline range.

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Influence of cold rolling on the precipitation in an Al–Mn–Zr alloy

Cited by 11 publications

References 11 publications

Characterization of Precipitation in 7055 Aluminum Alloy by Laser Ultrasonics

Characterization of Precipitation in 7055 Aluminum Alloy by Laser Ultrasonics

Influence of zinc addition on the precipitation in Al-Mn-Zr alloys

High Temperature Deformation of Twin-Roll Cast Al-Mn-Based Alloys after Equal Channel Angular Pressing

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