The effect of heat treatments on the microstructure, texture and mechanical properties of the extruded magnesium alloy ME21
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Katrin Brömmelhoff
, Michael Huppmann und Walter Reimers
Abstract
Heat treatments of the hot extruded magnesium alloy ME21 were performed at 400 °C – 550 °C and various annealing times. The evolution of the microstructure, the texture and the resulting mechanical properties were investigated. The heat treatments result in grain growth and in an intensification of the so-called rare earth texture. The grain coarsening results in a decrease in the yield strength according to the Hall – Petch relationship. The rare earth texture also contributes to a decrease in the yield strength due to the easy activation of basal slip systems. However, this texture improves the ductility at room temperature. The combination of large grain sizes, dissolved Mg12Ce precipitates and the rare earth texture delivers fracture strains up to – 55 % under compression. The elongation under tension is less affected.
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© 2011, Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Prof. Dr.-Ing. Heinrich Wollenberger — 80 years
- Original Contributions
- Atom probe tomography: from physical metallurgy towards microelectronics
- Accumulation of radiation damage and disordering in MgAl2O4 under swift heavy ion irradiation
- TEM study of irradiation induced copper precipitation in boron alloyed EUROFER97 steel
- Order – disorder transformation in Ni – V alloys under electron irradiation
- Materials issues of the SINQ high-power spallation target
- The origin and development of the P{011}<111> orientation during recrystallization of particle-containing alloys
- Coarsening kinetics of Cu-rich precipitates in a concentrated multicomponent Fe–Cu based steel
- Beyond Ni-based superalloys: Development of CoRe-based alloys for gas turbine applications at very high temperatures
- The effect of heat treatments on the microstructure, texture and mechanical properties of the extruded magnesium alloy ME21
- Analysing SANS data to determine magnetisation reversal processes in composite perpendicular magnetic recording media using TEM images
- Dislocationless sliding in a polycluster glass
- Evolution of transformation plasticity during bainitic transformation
- Surface tension and viscosity of NiAl catalytic precursor alloys from microgravity experiments
- Synthesis of carbon nanotubes by fine Ni particles in Ni3Al foam
- Fabrication of dielectric thin films by sputtering deposition at different pressures with (Ba0.3Sr0.7)(Zn1/3Nb2/3)O3 ceramic as target
- DGM News
- DGM News
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Prof. Dr.-Ing. Heinrich Wollenberger — 80 years
- Original Contributions
- Atom probe tomography: from physical metallurgy towards microelectronics
- Accumulation of radiation damage and disordering in MgAl2O4 under swift heavy ion irradiation
- TEM study of irradiation induced copper precipitation in boron alloyed EUROFER97 steel
- Order – disorder transformation in Ni – V alloys under electron irradiation
- Materials issues of the SINQ high-power spallation target
- The origin and development of the P{011}<111> orientation during recrystallization of particle-containing alloys
- Coarsening kinetics of Cu-rich precipitates in a concentrated multicomponent Fe–Cu based steel
- Beyond Ni-based superalloys: Development of CoRe-based alloys for gas turbine applications at very high temperatures
- The effect of heat treatments on the microstructure, texture and mechanical properties of the extruded magnesium alloy ME21
- Analysing SANS data to determine magnetisation reversal processes in composite perpendicular magnetic recording media using TEM images
- Dislocationless sliding in a polycluster glass
- Evolution of transformation plasticity during bainitic transformation
- Surface tension and viscosity of NiAl catalytic precursor alloys from microgravity experiments
- Synthesis of carbon nanotubes by fine Ni particles in Ni3Al foam
- Fabrication of dielectric thin films by sputtering deposition at different pressures with (Ba0.3Sr0.7)(Zn1/3Nb2/3)O3 ceramic as target
- DGM News
- DGM News