Compressive deformation behavior modeling of AZ31 magnesium alloy at elevated temperature considering the strain effect

Nourollahi, Gh. A.; Farahani, Mohammad Reza; Babakhani, Abolfazl; Mirjavadi, Seyed Sajad

doi:10.1590/s1516-14392013005000149

Cited by 16 publications

(5 citation statements)

References 25 publications

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“…Considering the effects of strain on material parameters, Lin et al (Ref 15) proposed an improved Arrhenius-type equation to describe the deformation behaviors of 42CrMo steel over wide ranges of strain rate and deformation temperature. Furthermore, this constitutive model has been successfully verified by some other alloys, such as magnesium alloys (Ref 16,17) developed the physically based constitutive equations for describing the work hardening-dynamic recovery and dynamic recrystallization behaviors of some typical alloys. In addition, some neural network models for alloys were established to predict hot deformation behaviors of some typical alloys, such as 42CrMo steel (Ref 39) and Al-Zn-Mg alloy (Ref 40).…”

Section: Introductionmentioning

confidence: 88%

New Constitutive Model for Hot Deformation Behaviors of Ni-Based Superalloy Considering the Effects of Initial δ Phase

Lin

Zhou

et al. 2015

J. of Materi Eng and Perform

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The hot deformation behaviors of a typical Ni-based superalloy are investigated by uniaxial tensile tests over wide ranges of strain rate and deformation temperature. The experimental results show that the flow stress is sensitive to strain, strain rate, and deformation temperature. Especially, initial d phase (Ni 3 Nb) has a special effect on the flow stress. The initial d phase can enhance the work-hardening behavior and result in the increased peak stress at relatively small strains. With the further straining, the initial d phase can stimulate the dynamic recrystallization and promote the dynamic-softening behaviors. Considering the synthetical effects of deformation temperature, strain, strain rate, and initial d phase on the hot deformation behaviors, a new phenomenological constitutive model is proposed. In the proposed model, the peak stress and material constant are expressed as functions of Zener-Hollomon parameter and the initial content of d phase. A good agreement between the predicted and measured results shows that the proposed model can give an accurate and precise estimate of the hot deformation behaviors for the studied Ni-based superalloy.

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Section: Introductionmentioning

confidence: 88%

New Constitutive Model for Hot Deformation Behaviors of Ni-Based Superalloy Considering the Effects of Initial δ Phase

Lin

Zhou

et al. 2015

J. of Materi Eng and Perform

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“…8, 9 and 10. This type of approach was also applied by Quan et al [23], [18] 5.23 145 Nourollahi et al [19] 3.5 145 Bhattacharya et al [20] 5.5…”

Section: Dynamic Recrystallized Volume Fractionmentioning

confidence: 98%

Numerical modeling of flow stress and grain evolution of an Mg AZ31B alloy based on hot compression tests

Giorjao

Monlevade

Ávila

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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Magnesium alloys offer a wide range of applications in modern lightweight structures, although the correct forming parameters need to be found to reach a good combination of fine microstructure and the required mechanical properties. Several discrete and statistical methods have been proposed to simulate the dynamic recrystallization process and adopted to study microstructural evolution. However, the materials parameters necessary to develop these models are not widely available. Hence, industrial evaluation of these parameters is complex, unpractical for several types of material and time consuming for daily industrial applications. In that way, the thermomechanical behavior and grain size evolution modeling of the AZ31 alloy are proposed using isothermal compression data. Parameters to calculate coupled stress-strain-temperature parameters, dynamic recrystallization, volume fraction and grain size were obtained from the stress-strain curves. Then, the data were input in Deform-3D software to simulate the hot deformation process and verify with experimental data the consistency of the values obtained. Measured grains size agreed with the conducted modeling, showing the reliability of strain-stress and grain size data on predicting dynamic recrystallization phenomena.

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“…Therefore, it is believed that plastic strain has a minor effect in this particular case. [33] The parameters related to the chemical free energy in Eqs. ( 4) and ( 5) are determined by physical analysis or experimental data from real AZ31 alloy, and we use the method described in our recent studies to obtain the parameters values.…”

Section: Model Descriptionmentioning

confidence: 99%

Effect of elastic strain energy on grain growth and texture in AZ31 magnesium alloy by phase-field simulation

Wang

Jin

et al. 2017

Chinese Phys. B

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A phase-field model is modified to investigate the grain growth and texture evolution in AZ31 magnesium alloy during stressing at elevated temperatures. The order parameters are defined to represent a physical variable of grain orientation in terms of three angles in spatial coordinates so that the grain volume of different order parameters can be used to indicate the texture of the alloy. The stiffness tensors for different grains are different because of elastic anisotropy of the magnesium lattice. The tensor is defined by transforming the standard stiffness tensor according to the angle between the (0001) plane of a grain and the direction of applied stress. Therefore, different grains contribute to different amounts of work under applied stress. The simulation results are well-explained by using the limited experimental data available, and the texture results are in good agreement with the experimental observations. The simulation results reveal that the applied stress strongly influences AZ31 alloy grain growth and that the grain-growth rate increases with the applied stress increasing, particularly when the stress is less than 400 MPa. A parameter (∆d) is introduced to characterize the degree of grain-size variation due to abnormal grain growth; the ∆d increases with applied stress increasing and becomes considerably large only when the stress is greater than 800 MPa. Moreover, the applied stress also results in an intensive texture of the 0001 axis parallel to the direction of compressive stress in AZ31 alloy after growing at elevated temperatures, only when the applied stress is greater than 500 MPa.

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Compressive deformation behavior modeling of AZ31 magnesium alloy at elevated temperature considering the strain effect

Cited by 16 publications

References 25 publications

New Constitutive Model for Hot Deformation Behaviors of Ni-Based Superalloy Considering the Effects of Initial δ Phase

New Constitutive Model for Hot Deformation Behaviors of Ni-Based Superalloy Considering the Effects of Initial δ Phase

Numerical modeling of flow stress and grain evolution of an Mg AZ31B alloy based on hot compression tests

Effect of elastic strain energy on grain growth and texture in AZ31 magnesium alloy by phase-field simulation

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