Hot deformation behaviour of Mg–3Al alloy—A study using processing map

Srinivasan, N.; Prasad, Y. V. R. K.; Rao, P. Rama

doi:10.1016/j.msea.2007.04.103

Cited by 206 publications

(71 citation statements)

References 20 publications

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“…Figure 3. The stress-strain behavior shows an increase in stress with concurrent work hardening during the initial stages of tensile deformation; the stress then reached a maximum, after which the tensile specimen broke and the stress decreased because of work hardening [29].…”

Section: Methodsmentioning

confidence: 99%

Transition in Deformation Mechanism of AZ31 Magnesium Alloy during High-Temperature Tensile Deformation

Noda

Mori

Funami

2011

Journal of Metallurgy

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Magnesium alloys can be used for reducing the weight of various structural products, because of their high specific strength. They have attracted considerable attention as materials with a reduced environmental load, since they help to save both resources and energy. In order to use Mg alloys for manufacturing vehicles, it is important to investigate the deformation mechanism and transition point for optimizing the material and vehicle design. In this study, we investigated the transition of the deformation mechanism during the high-temperature uniaxial tensile deformation of the AZ31 Mg alloy. At a test temperature of 523 K and an initial strain rate of 3 × 10 −3 s −1 , the AZ31 Mg alloy (mean grain size: ∼5 μm) exhibited stable deformation behavior and the deformation mechanism changed to one dominated by grain boundary sliding.

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Section: Methodsmentioning

confidence: 99%

Transition in Deformation Mechanism of AZ31 Magnesium Alloy during High-Temperature Tensile Deformation

Noda

Mori

Funami

2011

Journal of Metallurgy

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“…The processing maps are constructed using the dynamic material model principles, which have been reviewed by Prasad and Srinivasan (Ref 19,20). In this model, it is considered that the work piece undergoing hot deformation dissipates power, and the instantaneous power dissipated can be separated into two complementary parts: the G content (temperature rise) and the J content (microstructure mechanisms).…”

Section: Processing Mapsmentioning

confidence: 99%

Effects of Ce Addition on High Temperature Deformation Behavior of Cu-Cr-Zr Alloys

Zhang

Tran

Chai

et al. 2015

J. of Materi Eng and Perform

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Hot deformation behavior of the Cu-Cr-Zr and Cu-Cr-Zr-Ce alloys was investigated by compressive tests using the Glee-ble-1500D thermomechanical simulator at 650-850°C and 0.001-10 s 21 strain rate. The flow stress decreased with the deformation temperature at a given stain rate. However, the flow stress increased with the strain rate at the same deformation temperature. The constitutive equations for two kinds of alloys were obtained by correlating the flow stress, the strain rate and temperature using stepwise regression analysis. The addition of Ce can refine the grain and effectively accelerate dynamic recrystallization. The processing maps were established, based on the dynamic material model. Instability zones in the flow behavior can be easily recognized. Hot deformation optimal processing parameters were obtained in the range of this experiment. The hot deformation characteristics and microstructure were also analyzed by the processing maps. The addition of Ce can optimize hot workability of the Cu-Cr-Zr alloy.

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“…The latter mechanism results from a continuous increase in density during deformation. Furthermore, domains such as domain I that possess a high efficiency of the power dissipation (η) and good workability have generally been associated with dynamic restoration mechanisms, such as dynamic recovery and recrystallization [18]. At the beginning of deformation, the dislocation density and the density of the powder compact increase rapidly, which lead to a sharp increase in the flow stress.…”

Section: Processing Mapsmentioning

confidence: 99%

“…Processing parameters, such as deformation temperature and strain rate, and material factors, such as microstructure of the starting material, are the main factors affecting the hot deformation flow stress. Thus, several studies have been performed to investigate the effect of both processing parameters and materials factors on the hot deformation behavior of bulk Mg alloys [11,[16][17][18]. The deformation behavior of porous materials is different from that of bulk materials.…”

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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Hot deformation behaviour of Mg–3Al alloy—A study using processing map

Cited by 206 publications

References 20 publications

Transition in Deformation Mechanism of AZ31 Magnesium Alloy during High-Temperature Tensile Deformation

Transition in Deformation Mechanism of AZ31 Magnesium Alloy during High-Temperature Tensile Deformation

Effects of Ce Addition on High Temperature Deformation Behavior of Cu-Cr-Zr Alloys

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

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