Recrystallization of twin-roll cast Al–Fe–Si foil stock processed without homogenization

Birol, Yücel

doi:10.1016/j.jallcom.2009.08.135

Cited by 10 publications

(5 citation statements)

References 18 publications

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“…Differential scanning calorimetry (DSC) is a thermal analysis technique that measures the energy absorbed or released by a sample as a function of temperature or time. [16][17][18][19][20][21][22][23] Analysis by DSC has wide applications for examining solid state reactions and solid-liquid reactions in many materials. [24][25][26] Quantitative analyses of the kinetics of reactions may be assessed by reviewing the interrelation between activation energy analysis methods.…”

Section: Introductionmentioning

confidence: 99%

Differential scanning calorimetry study of constrained groove pressed low carbon steel: Recovery, recrystallisation and ferrite to austenite phase transformation

Khodabakhshi

Kazeminezhad

2014

Materials Science and Technology

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Low carbon steel sheets are subjected to severe plastic deformation (SPD) via constrained groove pressing (CGP) up to five passes. As a result of this process, strain magnitude up to 5·8 is imposed to the sheets, which leads to grain size of 225 nm. These nanostructured steel sheets, due to their high dislocation density and ultrafine microstructure, are very sensitive to heating. In the present study, recovery, recrystallisation and ferrite to austenite phase transformation phenomena for the SPD steel are investigated using differential scanning calorimetry method. The results show that with increasing the strain in steel sheets, the deformed stored energy (released through recovery and recrystallisation) and enthalpy of ferrite to austenite phase transformation are significantly increased and varied in 38·5–85·8 and 109–156·1 MJ m−3 ranges respectively. In addition, transformation temperature is decreased from 761 to 750°C after five CGP passes. However, recovery stored energy, recovery and recrystallisation peak temperatures are not changed, considerably. Experimental data show that with increasing the hardness, the stored energy is increased. One empirical equation is developed for relationship between hardness and stored energy of severely deformed low carbon steel. In addition, using the dislocation model, this mentioned relationship is justified.

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Section: Introductionmentioning

confidence: 99%

Differential scanning calorimetry study of constrained groove pressed low carbon steel: Recovery, recrystallisation and ferrite to austenite phase transformation

Khodabakhshi

Kazeminezhad

2014

Materials Science and Technology

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“…2. A subtle grain elongation appearing in the central part of the TRC strip is typical when an additional deformation of already solidified central part of the strip occurs in the gap between the rolls, and grain coarsening is effectively inhibited by segregating primary phases rich in Fe, Si, Mg and Mn [19], which are always present in commercial purity Al alloys. Coarser grains with the size of about 200 µm appearing in both alloys in the areas closer to the surface of the strip (well visible in the Al-Mg alloy in Fig.…”

Section: Resultsmentioning

confidence: 99%

The Influence of Annealing on Microstructure and Microhardness of Twin-roll Cast Al-Mg-Sc-Zr Alloy

et al. 2018

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Twin-roll casting is an effective and energy-saving method enabling direct preparation of strips of the requested final thickness. However, due to high solidification rates and higher solid solution supersaturation a significantly different microstructure is formed in comparison with conventionally cast alloys. Recently, the Sc and Zr containing aluminum alloys are considered to be new advanced materials for the transportation industry. The influence of Sc and Zr on mechanical properties of twin-roll cast Al-Mg alloy was investigated in the present study. A significant effect of Sc and Zr on hardening of the material after annealing in temperature interval between 250 • C and 400 • C was confirmed. Maximal hardness was obtained after two hours of annealing at 300 • C due to precipitation of a fine dispersion of Sc and Zr containing precipitates. Exposure of the annealed material to higher temperatures results in a partial degradation of mechanical properties due to changes of the strengthening effect of precipitates. However, a partially positive role of remaining precipitates, hindering recrystallization, persists even up to 550 • C.

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“…The relation can be expressed as [15] (1) Where P d is recrystallization force, ρ is dislocation density, µ is shear modulus, and b is Burgers vector. Relative to ECAP, conventional cold rolling can also decrease recrystallization temperature of materials [16]. However, it is not clear that how much cold rolling reduction and ECAP passes decrease recrystallization temperature of materials, respectively.…”

Section: Resultsmentioning

confidence: 99%

Effect of Equal Channel Angular Pressing on Microstructure and Recrystallization Temperature of Al-Cu Alloy

Fang

Liu

et al. 2014

AMR

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Al-0.6%Cu alloy processed by equal channel angular pressing (ECAP) was investigated in this study. The samples processed with 1, 2 and 4 ECAP passes were annealed at different temperatures. And the microstructures of the Al-0.63%Cu alloy samples were observed. The results show that the grains of the alloy are refined to sub-micron level after multipass ECAP. Moreover, it is found that the recrystallization temperature of the Al-0.6%Cu alloy samples decreases with increasing the number of ECAP passes. Based on the study above, effect of cold rolling reduction and ECAP passes on recrystallization temperature of materials should be further investigated.

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Recrystallization of twin-roll cast Al–Fe–Si foil stock processed without homogenization

Cited by 10 publications

References 18 publications

Differential scanning calorimetry study of constrained groove pressed low carbon steel: Recovery, recrystallisation and ferrite to austenite phase transformation

Differential scanning calorimetry study of constrained groove pressed low carbon steel: Recovery, recrystallisation and ferrite to austenite phase transformation

The Influence of Annealing on Microstructure and Microhardness of Twin-roll Cast Al-Mg-Sc-Zr Alloy

Effect of Equal Channel Angular Pressing on Microstructure and Recrystallization Temperature of Al-Cu Alloy

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