Improvement in cold formability of AZ31 magnesium alloy sheets processed by equal channel angular pressing

Suh, Joung Sik; Victoria-Hernández, José; Letzig, Dietmar; Golle, Roland; Yi, Sangbong; Bohlen, Jan; Volk, Wolfram

doi:10.1016/j.jmatprotec.2014.11.029

Cited by 63 publications

(30 citation statements)

References 24 publications

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“…In this regard, limits have been seen for a long time, which were based in the limited deformation behavior of magnesium alloys, and often associated with the hexagonal close-packed lattice structure of this metal and its alloys. Many works on the microstructure-property relationship [3][4][5][6] have concluded that the formation of strong textures, especially with a preferential alignment of basal planes in the sheet plane, is an important reason for limited formability. This limitation is primarily due to the limited strain accommodation, especially by basal slip [7], e.g., such textures are formed during the rolling process.…”

Section: Introductionmentioning

confidence: 99%

Processing Effects on the Formability of Magnesium Alloy Sheets

Bohlen

Cano

Drozdenko

et al. 2018

Metals

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Abstract:As a generalized semi-finished product, the use of magnesium sheets requires addressing two major aspects of their processing: their microstructure and texture control, which are both essential for the forming behavior of such sheets during their forming to parts. Further, the processing of such sheets is complex, and therefore expensive, and requires simplification. In this work, magnesium alloys AZ31, ZE10, and ME21 are investigated in the form of conventionally rolled sheets, as well as in the form of extruded sheets. Their microstructural and textural development are correlated to their mechanical and forming properties. During extrusion, strong textures develop that hinder stretch-forming operations, even in rare earth-containing alloys. Chemical composition and process parameters have a significant impact on the texture development, and enable the design of sheet materials with weak textures and potentially enhanced formability.

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Section: Introductionmentioning

confidence: 99%

Processing Effects on the Formability of Magnesium Alloy Sheets

Bohlen

Cano

Drozdenko

et al. 2018

Metals

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“…Various studies have been performed to show the importance of these methods in improving the properties of different materials. Significant improvement in tensile strength 7 , fatigue resistance 8 , impact toughness 9 , wear resistance 10,11 , corrosion behavior 12,13 superplasticity 14,15 , formability 16 , etc were observed using this method.…”

Section: Introductionmentioning

confidence: 95%

An Investigation on the Deformation Heating in Billet and Die During Equal-Channel Angular Pressing and High-Pressure Torsion

Karami

2016

Mat. Res.

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This work aims to investigate the temperature rise in Aluminum alloy 6061 due to deformation heating in equal channel angular pressing (ECAP) and high-pressure torsion (HPT) processes using finite element method. The roles of various parameters are investigated and the heating of ECAP die due to billet deformation is included in the simulations. The results show that while the work-piece moves in the exit channel, the generated heat is transferred to die via conduction and therefore the temperature isosurfaces in die are extended in the direction of inlet and exit channels. The dependency of maximum work-piece temperature to velocity is more than its dependency to friction. Increasing the plunger velocity increases the difference between maximum and minimum temperatures. Additionally, the maximum work-piece temperature is attained at the deformation zone. The temperature rise in HPT is less than ECAP due to the small size of the HPT work-piece compared to ECAP. Not only the work-piece size, but also the good heat conduction of aluminum makes the temperature distribution roughly uniform in HPT.

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“…Ways to improve the formability of Mg alloys, especially at temperatures lower than 200 • C (i.e., "low temperature formability"), have been investigated and two approaches are of significant interest. The first approach is the utilization of different thermomechanical treatments to modify the crystallographic texture and, therefore, enhance the potential to activate more deformation modes during forming (Suh et al, 2015). In this regard, severe plastic deformation techniques are effective to enhance the ductility, strength of Mg alloys (Agnew et al, 2004;Biswas et al, 2010Biswas et al, , 2013.…”

Section: Introductionmentioning

confidence: 99%