The Evolution of Microstructure and Mechanical Properties of Al-Mn-Fe-Si Alloys During Isothermal Annealing

Šlapáková, Michaela; Zimina, Mariia; Cieslar, Miroslav

doi:10.12693/aphyspola.128.746

Cited by 5 publications

(4 citation statements)

References 23 publications

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“…Both non-annealed alloys retain their fine-grained structure during exposition to 400 °C for the time of about 1.5 h which is necessary for the complete tensile test. This is in agreement with results of isothermal annealing [ 11 ]. The deformation behavior reveals some indications of superplastic deformation—an increase in ductility to values above 100%, an increase of parameter m to 0.25, and especially the appearance of strain rate dependence of the parameter m with a characteristic maximum.…”

Section: Discussionsupporting

confidence: 93%

“…The combination of TRC and ECAP is relatively scarce in the literature. Our previous research revealed that this processing route resulted in a significant microstructure refinement in the Al-Mn-based alloys [ 11 , 12 ]. The formation of individual submicrometer grains along the boundaries of elongated grains of the TRC material occurred already during the first ECAP pass.…”

Section: Introductionmentioning

confidence: 99%

“…Such behaviour is conditioned by the stability of the fine-grained microstructure. The experiments performed on the ECAP Al-Mn-based alloys revealed that, in this temperature range, recrystallization and grain growth occurred [ 11 , 17 ]. These processes can be influenced by modification of chemical and phase composition or by unconventional treatment.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2015

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“…Deformation induced during the ongoing solidification process leads to the excess of defects mainly in the center of the strip [4]. For magnesium and aluminum, the TRC is well-developed and allows a production of high quality thin strips [5,6]. However, an establishment of appropriate casting conditions varies for varied materials and is time consuming.…”

Section: Introductionmentioning

confidence: 99%

Center Line Segregation in Twin-Roll Cast AZ31 Magnesium Alloy

Zimina

Šlapáková

Bohlen³

et al. 2018

Acta Phys. Pol. A

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A three-dimensional approach to microstructural investigations was for the first time applied to a continuous cast material in order to understand solidification processes and liquid flow during casting. A twin-roll cast AZ31 magnesium alloy strip was subjected to observations by light optical microscopy, electron microscopy, and X-ray microtomography. The last one is found to be the only suitable for the 3D characteristic of the segregation channels containing Mn and Al-rich primary phases located in the central zone of the strip. It was shown that a reliable three-dimensional image of the volume containing central line segregation cannot be obtained using conventional metallographic methods, whereas X-ray microtomography allows the complete reconstruction of major features of the central segregation in the alloy.

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Development of microstructure of asymmetrically rolled AA3003 aluminium sheets with Zr addition

Šlapáková

Kihoulou

Grydin

2023

Journal of Alloys and Metallurgical Systems

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The Evolution of Microstructure and Mechanical Properties of Al-Mn-Fe-Si Alloys During Isothermal Annealing

Cited by 5 publications

References 23 publications

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

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

Center Line Segregation in Twin-Roll Cast AZ31 Magnesium Alloy

Development of microstructure of asymmetrically rolled AA3003 aluminium sheets with Zr addition

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