Effect of rare earth elements on the microstructure and texture development in magnesium–manganese alloys during extrusion

Bohlen, Jan; Yi, Sangbong; Letzig, Dietmar; Kainer, Karl Ulrich

doi:10.1016/j.msea.2010.07.081

Cited by 359 publications

(169 citation statements)

References 24 publications

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“…6a). A pronounced intensity at this pole has hitherto only been found in magnesium extrusions containing rare earth elements [7,16,17]. Fig.…”

Section: Fig 1 Shows Ebsd Orientation Maps and The Corresponding Invmentioning

confidence: 97%

“…Two IPFs separate this fraction of the microstructure into smaller and larger grains where the average recrystallised grain size is used as a constraint. A similar analysis was applied in [16] in order to separate effects of the growth kinetics of grains with different orientations in Mg-Mn alloys containing rare earth elements. (low Z), a distinct 11.0 texture component is observed which appears to be more pronounced in the large grains than in the small grains.…”

Section: Texture Of the Recrystallised Fraction Of The Microstructurementioning

confidence: 99%

“…These weaker textures no longer exhibit a distinct basal fibre component, but tend to show off-basal peaks [12,13] and a broader orientation distribution of the basal planes towards the transverse direction (TD) rather than towards the rolling direction (RD). In the case of round bar extrusions, textures have also been found which exhibit a weak 11.1 texture component at the expense of the conventional 10.0-11.0 fibre texture [14,15,16].…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and texture development in hydrostatically extruded Mg–Al–Zn alloys during tensile testing at intermediate temperatures

Victoria-Hernández

Letzig

et al. 2013

Acta Materialia

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Tensile testing of hydrostatically extruded round bars of AZ31 and AZ61 has been performed to analyse the flow behaviour as well as the microstructure and texture development as a function of temperature (175-225 °C) and strain rate (0.0001-0.01). The post-testing microstructure is a result of dynamic recrystallisation with varying significance of different texture components. In some cases the resulting textures are found to be similar to those textures that typically develop during extrusion of rare earth containing magnesium alloys. Dynamic recrystallisation (DRX) and grain boundary sliding (GBS) are considered as the mechanisms that generate the changes in texture. Precipitates can exert a grain boundary pinning effect limiting grain growth. These different mechanisms contribute differently to the texture development if the testing parameters were changed.

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“…6a). A pronounced intensity at this pole has hitherto only been found in magnesium extrusions containing rare earth elements [7,16,17]. Fig.…”

Section: Fig 1 Shows Ebsd Orientation Maps and The Corresponding Invmentioning

confidence: 97%

Section: Texture Of the Recrystallised Fraction Of The Microstructurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microstructure and texture development in hydrostatically extruded Mg–Al–Zn alloys during tensile testing at intermediate temperatures

Victoria-Hernández

Letzig

et al. 2013

Acta Materialia

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“…the extrusion speed, can signicantly inuence the development of microstructure (i.e. the grain size and grain size distribution) and, consequently, inuence the mechanical properties of the resulting prole [6,7].…”

Section: Introductionmentioning

confidence: 99%

On the Effect of the Extrusion Speed on Microstructure and Plastic Deformation of ZE10 and ZEK100 Magnesium Alloys - an Acoustic Emission Study

et al. 2012

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MgZn-based alloys ZE10 and ZEK100 have been extruded at dierent speeds varying from 1 m/min to 20 m/min. Specimens taken in the extrusion direction were uniaxially loaded in tension and compression at room temperature. The results are discussed using concurrent acoustic emission monitoring during mechanical testing and the acoustic emission signal analysis that correlates the microstructure and the stressstrain curves to the possible deformation mechanisms. In all tests, the acoustic emission response exhibited a large acoustic emission peak at the beginning of plastic deformation. A small local maximum on the onset of the acoustic emission activity was frequently observed, i.e. at very low stresses. For the alloys with bimodal grain structure tested in compression, an additional acoustic emission peak appeared at larger strains. This peculiar behavior can be explained by interplay of (1012)-twinning and dislocation slip in samples with various grain size distributions.

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“…Therefore the parabolic stage III, characterized by a linear decrease of the work hardening rate which leads to neck formation, is delayed to higher strains in comparison to rolled samples with a basal texture [21]. The texture can be additionally modified by composition changes, such as by the addition of rare earth elements (La, Ce, Gd, Nd) [36][37][38][39]43]. The reasons why, for example, weaker textures can be obtained after processing an Mg-RE alloy by hot extrusion are still not well known.…”

Section: Introductionmentioning

confidence: 99%

Influence of thermomechanical processing on the grain size, texture and mechanical properties of Mg-Al alloys

Srinivasarao¹,

Valle²,

Ruano³

et al. 2012

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The work carried out by the authors over the last decade on the processing, microstructural characterization and the mechanical behaviour of Mg alloys is reviewed. In particular, the potential for grain refinement and for the development of specific textures of large strain hot rolling (LSHR), equal channel angular pressing (ECAP) and accumulative roll bonding (ARB) is discussed. The recrystallization and the deformation mechanisms predominant in Mg alloys are analysed as a function of the grain size and the texture in a wide range of stresses, strain rates and temperatures. Finally, the feasibility of superplastic forming of Mg alloys was examined, taking into account the influence of factors such as grain size stability and microstructural heterogeneities.K e y w o r d s : magnesium alloys,

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Effect of rare earth elements on the microstructure and texture development in magnesium–manganese alloys during extrusion

Cited by 359 publications

References 24 publications

Microstructure and texture development in hydrostatically extruded Mg–Al–Zn alloys during tensile testing at intermediate temperatures

Microstructure and texture development in hydrostatically extruded Mg–Al–Zn alloys during tensile testing at intermediate temperatures

On the Effect of the Extrusion Speed on Microstructure and Plastic Deformation of ZE10 and ZEK100 Magnesium Alloys - an Acoustic Emission Study

Influence of thermomechanical processing on the grain size, texture and mechanical properties of Mg-Al alloys

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