Finite element analysis of strain distribution in ZK60 Mg alloy during cyclic extrusion and compression

Lin, Jianqun; Wang, Qudong; Liu, Manping; Chen, Yongjun; Roven, Hans Jørgen

doi:10.1016/s1003-6326(11)61405-2

Cited by 15 publications

(3 citation statements)

References 13 publications

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“…Severe plastic deformation (SPD) has been a widely used method to fabricate ultrafine grained metals and alloys, by introducing an ultralarge plastic strain into a bulk metal without any significant change in the overall dimensions [4,5]. Among the various SPD techniques, equal channel angular pressing (ECAP) and cyclic extrusion and compression (CEC) are attractive due to their characteristics of processing the relatively large bulk samples [5][6][7][8][9]. Up to now, ECAP processing has received the most attention from researchers than other SPD processes, including CEC.…”

Section: Introductionmentioning

confidence: 99%

Influence of Grain Size and Texture on the Yield Strength of Mg Alloys Processed by Severe Plastic Deformation

Lin

Ren

Wang

et al. 2014

Advances in Materials Science and Engineering

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Severe plastic deformation (SPD) has been widely employed to refine the grain size of Mg alloys, with the main objective to improve the strength and ductility of Mg alloys, since the well-known Hall-Petch equation suggests that a decreased grain size leads to an increased yield strength. However, the yield strength of Mg alloys processed by SPD is often decreased even though the grain size is effectively reduced. The abnormal flow behavior in Mg alloys processed by SPD has attracted great attention although this mechanism is still unclear, due to its complex and extensive influence factors. In this paper, the relationships between the processing conditions, grain refinement, and mechanical properties of the SPD treated Mg alloys are reviewed, with the emphasis on the effects of grain size and texture on the yield strength.

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Section: Introductionmentioning

confidence: 99%

Influence of Grain Size and Texture on the Yield Strength of Mg Alloys Processed by Severe Plastic Deformation

Lin

Ren

Wang

et al. 2014

Advances in Materials Science and Engineering

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“…Rolling and forging [4] belong unequivocally to the main forming technologies used for magnesium alloys processing in practice, while severe plastic deformation (SPD) techniques have been developed for effective grain refinement (ultrafine grain materials (UFG) preparation) and mechanical properties improvement in accordance with the Hall-Petch relation [6]. Among non-conventional technologies SPD techniques, such as equal channel angular pressing (ECAP) [7][8][9][10], accumulative back extrusion (ABE) [11,12], cyclic extrusion compression (CEC) [13], twist channel angular pressing (TCAP) [14], high pressure torsion (HPT) [15] or friction stir processing (FSP) [16] can be mentioned. These methods can be combined with conventional or other (SPD) technologies as well [17].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Mechanical Properties and Microstructure Development of AZ61 Alloy during Rolling, Forging and ECAP

Kunčická

Kocich

2013

AMR

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Results of experiments, focused on development of modified AZ61 alloy structure after hot forming, are summarized in this paper. Microstructure changes of the alloy after rolling and forging at temperatures of 380°C and after ECAP processed at 250°C were observed. After forging, the original grain size was reduced almost 14 times down to a value around 9 μm. After ECAP the grain size reduction was even better, almost 60 times. Important role of the ß-phase (Mg17Al12) in this alloy, during plastic forming, was confirmed. Independently of processing technology, the best final properties of the AZ61 alloy were supported with very fine particles distributed in the Mg matrix. The experiment succeeded in proving the influence of precipitates on restoration processes too.

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“…Lin et al [13] studied the strain distribution of the ZK60 during CEC by finite element analysis. The results showed that the strain distribution was inhomogeneous after CEC.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of ZM6 magnesium alloy after continuous variable cross-section direct extrusion

LI¹,

SHI²,

HU³

et al. 2021

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Due to the shortcomings existing in the methods of the traditional severe plastic deformation for the production of refined grain material, this paper presents a new extrusion method -continuous variable cross-section direct extrusion (CVCDE), with which interim dies between the billet and the die are added. This method not only shortens the process, but also realizes the integration of material preparation-forming technology. Compared with conventional extrusion, the extrusion with interim dies has a greater effect on the grain refinement and improves the tensile strength. At the same time, the fracture mechanism changes from brittle cleavage to ductile fracture. By the use of CVCDE, the metal flow uniformity is significantly improved and the possibility of the surface crack decreases. The streamline fold defects disappear when two interim dies have been employed. It provides a theoretical basis for the technique of short process extrusion forming so as to manufacture high performance magnesium alloy production.K e y w o r d s : microstructure, mechanical properties, continuous variable cross-section direct extrusion (CVCDE), magnesium alloy

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Finite element analysis of strain distribution in ZK60 Mg alloy during cyclic extrusion and compression

Cited by 15 publications

References 13 publications

Influence of Grain Size and Texture on the Yield Strength of Mg Alloys Processed by Severe Plastic Deformation

Influence of Grain Size and Texture on the Yield Strength of Mg Alloys Processed by Severe Plastic Deformation

Investigation of Mechanical Properties and Microstructure Development of AZ61 Alloy during Rolling, Forging and ECAP

Microstructure and mechanical properties of ZM6 magnesium alloy after continuous variable cross-section direct extrusion

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