Homogenization of a twin-roll cast thin Al–Mn strip

Birol, Yücel

doi:10.1016/j.jallcom.2008.04.005

Cited by 49 publications

(18 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Although the diraction peaks are relatively weak due to the small volume fraction. They coincide fairly well with the positions of the Al 6 (Mn,Fe) phase [16,22]. Taking into account the pronounced resistivity decrease (∆ρ ≈ 15 nΩ m) and the precipitation of AlScZr system (∆ρ ≈ 1 nΩ m), the possible concentration diminution ∆c of Mn in the matrix of the AlMnScZrPM alloy after annealing between 300…”

Section: Resultssupporting

confidence: 81%

See 1 more Smart Citation

Microstructure, Thermal and Mechanical Properties of Non-Isothermally Annealed Al-Sc-Zr and Al-Mn-Sc-Zr Alloys Prepared by Powder Metallurgy

et al. 2012

View full text Add to dashboard Cite

This paper reports results of a study aimed at understanding the precipitation processes occurring during the annealing of two AlScZr-based alloys with and without Mn prepared by powder metallurgy with subsequent hot extrusion at 350• C. Samples were isochronally annealed up to ≈ 570 • C. Precipitation behaviour was studied by electrical resistometry and dierential scanning calorimetry. Mechanical properties were monitored by microhardness HV1 measurements. Transmission electron microscopy examinations and X-ray diraction of specimens quenched from temperatures of signicant resistivity changes helped to identify the microstructural processes responsible for these changes. Fine (sub)grain structure develops and ne coherent Al3Sc and/or Al3(Sc,Zr) particles precipitate during extrusion in both alloys. The distinct changes in resistivity (at temperatures above ≈ 330• C) of the AlMnScZr alloy are mainly caused by precipitation of Mn-containing particles. The easier diusion of Mn atoms along the (sub)grain boundaries is responsible for the precipitation of the Al6Mn and/or Al6(Mn,Fe) particles at relatively lower temperatures compared to the temperature range of precipitation of these particles in the classical mould-cast AlMnScZr alloys The apparent activation energy for precipitation of the Al3Sc and Al6Mn particles in the AlMnScZr alloy was determined as (106 ± 10) kJ mol −1 and (152 ± 33) kJ mol −1 , respectively.

show abstract

Section: Resultssupporting

confidence: 81%

“…in the deformed AlMn-based alloys [13,14,16,22]. Now, we should note that the resistivity annealing curves of the AlMnScZrPM alloy at temperatures above ≈ 330…”

Section: Resultsmentioning

confidence: 91%

Microstructure, Thermal and Mechanical Properties of Non-Isothermally Annealed Al-Sc-Zr and Al-Mn-Sc-Zr Alloys Prepared by Powder Metallurgy

et al. 2012

View full text Add to dashboard Cite

show abstract

“…7. Microstructure analysis of the HE alloy also confirms the existence of the Al 6 Mn-phase particles with the size of ∼ 30 nm in (sub)grain interiors and hundreds of nanometres at (sub)grain boundaries in the alloy annealed up to 450 XRD analysis (performed earlier in the same alloys similarly treated) also confirms existence of the Al 6 Mn and/or Al 6 (Mn,Fe) particles in the bulk samples; although peaks were relatively weak due to a small volume fraction, they were clearly indexed on the base of the Al 6 Mn and/or Al 6 (Mn,Fe) phase [6,19,23,27,40,41]. Therefore one can suggest that the II-stage is very probably due to a formation of Mn-containing particles at (sub)grain boundaries and the III-stage is connected with a formation of the Al 6 Mn phase in (sub)grain interiors.…”

Section: Diffusivity Of Mn Atoms In Al Is Relatively Low At Temperatusupporting

confidence: 65%

“…There is no narrow range of the fast softening in the HR alloy which is typical for recrystallization processes and which was observed, e.g. in the Al-Mn-Zr--based alloys [25,41,45].…”

mentioning

confidence: 95%

Annealing effects in hot-deformed Al-Mn-Sc-Zr alloys

Vlach¹,

Stulı́ková²,

Smola³

et al. 2021

View full text Add to dashboard Cite

Microstructure, thermal, electrical and mechanical properties of the hot-extruded and hotrolled AlMnScZr alloys were studied. The electrical resistometry and microhardness together with differential scanning calorimetry measurements were compared with microstructure development observed by transmission electron microscopy, X-ray diffraction, and electron backscatter diffraction. Fine subgrain or grain structure developed and fine coherent Al3(Sc,Zr) particles precipitated during hot deformation and subsequent cooling. The distinct resistivity changes are mainly caused by precipitation of Mn-containing particles. The pronounced two-stage development of the Al6(Mn,Fe)-phase precipitation was observed. Nevertheless, the precipitation has a negligible effect on microhardness. The presence of the Mn-containing particles with a size of ∼ 50 nm inside subgrains or grains and ∼ 2 µm at subgrain or grain boundaries has a significant antirecrystallization effect. The combination of Mn, Sc and Zr additions to Al suppresses recrystallization during isothermal annealing at 550• C. Hot deformation has no effect on the apparent activation energy values of the Al3Sc-phase precipitation (Q = 109 kJ mol −1 ) and Al6Mn-phase precipitation (Q = 156 kJ mol −1 ).K e y w o r d s: Al3Sc phase, hot extrusion, hot rolling, activation energy, EBSD, DSC

show abstract

“…Homogenization also resulted in a marked reduction in the recrystallized grain size and faster recrystallization kinetics after cold rolling and annealing. Birol [11] also investigated the effect of homogenization on TRC-processed thin Al-Mn strips and obtained similar results.…”

Section: Introductionmentioning

confidence: 74%

Improvement of AA5052 sheet properties by electromagnetic twin-roll casting

et al. 2015

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Electromagnetic fields were used in twin-roll casting (TRC) of aluminum alloy 5052 (AA5052) for improvement of the microstructure and mechanical properties. A static magnetic field induces an inhibiting effect on the melt in the cast-rolling area and reduces diffusion of the solutes. It also results in more nucleating opportunities and less segregation, thus enhancing the mechanical properties. However, the static magnetic field does not change the orientation of crystal growth and columnar crystals still exist in microstructure. On the other hand, an oscillating magnetic field can refine the suspended particles and induce strong convection. This leads to more uniform distribution of temperature and solute elements, simultaneously increasing nucleating opportunities and decreasing segregation, thereby enhancing the mechanical properties. An oscillating magnetic field also inhibits the orientation of crystal growth and makes finer and equiaxed grains.

show abstract

Homogenization of a twin-roll cast thin Al–Mn strip

Cited by 49 publications

References 18 publications

Microstructure, Thermal and Mechanical Properties of Non-Isothermally Annealed Al-Sc-Zr and Al-Mn-Sc-Zr Alloys Prepared by Powder Metallurgy

Microstructure, Thermal and Mechanical Properties of Non-Isothermally Annealed Al-Sc-Zr and Al-Mn-Sc-Zr Alloys Prepared by Powder Metallurgy

Annealing effects in hot-deformed Al-Mn-Sc-Zr alloys

Improvement of AA5052 sheet properties by electromagnetic twin-roll casting

Contact Info

Product

Resources

About