Study of the plastic flow behaviors of AZ91 magnesium alloy during thermomechanical processes

Liu, Liufa; Ding, Hanlin

doi:10.1016/j.jallcom.2009.05.089

Cited by 69 publications

(30 citation statements)

References 11 publications

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“…2. As usual, at a given strain rate, by increasing the strain we have seen that the flow stress firstly increases up to a maximum and then decreases to a steady state. The flow softening beyond the peak stress is attributed to DRX as well as coarsening of ␤ precipitates [8][9][10]. As expected, peak stress increases with strain rate and decreases with deformation temperature.…”

Section: Resultssupporting

confidence: 64%

Effect of thermomechanical parameters on dynamically recrystallized grain size of AZ91 magnesium alloy

Ebrahimi

Maldar

Ebrahimi

et al. 2011

Journal of Alloys and Compounds

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Section: Resultssupporting

confidence: 64%

Effect of thermomechanical parameters on dynamically recrystallized grain size of AZ91 magnesium alloy

Ebrahimi

Maldar

Ebrahimi

et al. 2011

Journal of Alloys and Compounds

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“…The value of Q obtained from Fig. 6(b) was 75 kJ/mol, which is significantly lower than those previously reported for the hot compression of bulk AZ91 Mg alloy [9,27]. This can primarily be attributed to the presence of pores in the structure of AZ91 powder compacts.…”

Section: Kinetics Of Hot Deformationcontrasting

confidence: 58%

“…In the previous studies on hot deformation behavior of bulk AZ91 Mg alloy, the alloy was solutionized prior to hot compression [9,27]. Then, the alloying elements present in the chemical composition of AZ91 alloy, namely Al and Zn, can rationally be treated as mostly dissolved in the α-Mg solid solution phase.…”

Section: Kinetics Of Hot Deformationmentioning

confidence: 99%

“…It is believed that the content of alloying elements in solution has an important effect on the Q value of AZ series Mg alloys and the Q value of this alloy series increases with the increasing content of Al in solution (dissolved in the α-Mg solid solution phase). This phenomenon can be ascribed to the solute dragging effect of Al atoms in solution and the precipitation of fine β particles during deformation (dynamic aging), both reducing the mobility of dislocations and, as a result, increasing the Q value [27].…”

Section: Kinetics Of Hot Deformationmentioning

confidence: 99%

“…Some researchers have successfully applied hot deformation processes, such as hot compression [23], extrusion [24], equal channel angular pressing (ECAP) [25], and hot rolling [26], to as-cast AZ91 alloy and improved its mechanical properties to broaden the application potential for this alloy. However, studies on the hot deformation behavior of AZ91 alloy are relatively scarce [27,28]; and very limited data are available on this alloy's workability characteristics. Therefore, this study focused on the hot deformation behavior and workability characteristics of AZ91 Mg alloy powder compacts with a view to finding the optimum hot working parameters.…”

Section: Introductionmentioning

confidence: 99%

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Hot deformation behavior and workability characteristics of AZ91 magnesium alloy powder compacts—A study using processing map

Taleghani

Torralba

2013

Materials Science and Engineering: A

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This study examined the hot deformation behavior and workability characteristics of AZ91 Mg alloy powder compacts by performing hot compression tests with a Gleeble 3800 machine. To this end, powder compacts with a relative green density of 93% were hot-compressed at temperatures ranging from 150 1Cto5001C and at true strain rates ranging from 0.001 s −1 to 10 s −1 . The true stress-true strain curves peaked at low strains, after which the flow stress increased slightly or remained constant. The work hardening rate decreased with increasing deformation temperature or strain rate. Processing maps were developed for all of the hot compression tests at strains of 0.1, 0.5, and 0.8, which represented a safe deformation domain at deformation temperatures and strain rates in the ranges of 150-300 1C and 0.001-0.01 s −1 . Kinetic analysis of the flow stress data for the safe deformation domain yielded an activation energy of 75 kJ/mol which is lower than those previously reported for the hot compression of bulk AZ91 Mg alloy. According to the developed processing maps and the microstructures of the hot-compressed specimens, the optimum hot working window for AZ91 Mg alloy powder compacts was determined to lie between 275-325 1C and 0.001-0.01 s −1 .

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Microstructure and Texture Evolution in a Magnesium Alloy during Extrusion at Various Extrusion Speeds

Ma¹,

Horstemeyer²,

Li³

et al. 2013

Magnesium Technology 2013

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Study of the plastic flow behaviors of AZ91 magnesium alloy during thermomechanical processes

Cited by 69 publications

References 11 publications

Effect of thermomechanical parameters on dynamically recrystallized grain size of AZ91 magnesium alloy

Effect of thermomechanical parameters on dynamically recrystallized grain size of AZ91 magnesium alloy

Hot deformation behavior and workability characteristics of AZ91 magnesium alloy powder compacts—A study using processing map

Microstructure and Texture Evolution in a Magnesium Alloy during Extrusion at Various Extrusion Speeds

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