A constitutive model to describe high temperature flow behavior of AZ31B magnesium alloy processed by equal-channel angular pressing

Arun, Malavika; Chakkingal, Uday

doi:10.1016/j.msea.2019.03.106

Cited by 33 publications

(8 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Arun and Chakkingal analyzed the hot deformation of the annealed and ECAPed AZ31B alloy, and they found that the Qact in the annealed condition (161.6 kJ/mol) decreases after ECAP due to the grain refinement [29]. However, the combined influences of deformation parameters (including temperature, strain rate and strain) on the evolution of Qact were rarely reported.…”

Section: Introductionmentioning

confidence: 99%

Flow characterization of magnesium alloy ZK61 during hot deformation with improved constitutive equations and using activation energy maps

Long

Xia

Xiao

et al. 2021

International Journal of Mechanical Sciences

View full text Add to dashboard Cite

The present study aimed at characterizing the flow characteristics and workability of an as-extruded magnesium alloy ZK61 by isothermal compression tests performed at temperatures of 523-673K and strain rates of 0.001-1s -1 . The flow stress curves were analyzed via considering the mechanism of microstructure evolution. Using the obtained flow stress data, both of the conventional and improved Arrhenius constitutive equations were developed to predict the flow characteristics, and the 3D activation energy maps were constructed to propose the optimal deformation conditions and reveal the effects of deformation parameters on microstructure evolution. It can be found that the strain factor plays an important role in determining the shapes of the flow stress curves, which exhibit three types of variation tendencies due to the flow softening and hardening behaviour as the strain increases. The improved constitutive equations resulted in excellent predictability of the peak flow stress within all the deformation conditions. Combining with the activation energy maps, the dominant deformation mechanisms, i.e., dynamic recrystallization and flow localization in different deformation regions were identified, and the optimal processing window of the alloy can be obtained at strain rate and temperature range of 0.001-0.01s -1 and 623 ~ 673K under a certain strain of 0.9.

show abstract

Section: Introductionmentioning

confidence: 99%

Flow characterization of magnesium alloy ZK61 during hot deformation with improved constitutive equations and using activation energy maps

Long

Xia

Xiao

et al. 2021

International Journal of Mechanical Sciences

View full text Add to dashboard Cite

show abstract

“…A similar result was obtained by developing constitutive models of 21–4 N heat resistant steel [ 9 ]. Moreover, the strain-compensated Arrhenius-type equation is most widely applied to describe the high-temperature flow behavior of metals and alloys [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. These results mean that the strain-compensated Arrhenius-type model has a relatively strong predictive ability.…”

Section: Introductionmentioning

confidence: 99%

Constitutive Equations for Describing the Hot Compressed Behavior of TC4–DT Titanium Alloy

Wang

et al. 2020

Materials

View full text Add to dashboard Cite

Isothermal hot compression tests of TC4–DT titanium alloy were performed under temperatures of 1203–1293 K and strain rates of 0.001–10 s−1. The purpose of this study is to develop a new high-precision modified constitutive model that can describe the deformation behavior of TC4–DT titanium alloy. Both the modified strain-compensated Arrhenius-type equation and the modified Hensel–Spittel equation were established by revising the strain rate. The parameters in the above two modified constitutive equation were solved by combining regression analysis with iterative methods, which was used instead on the traditional linear regression methods. In addition, both the original strain-compensated Arrhenius-type equation and Hensel–Spittel equation were established to compare with the new modified constitutive equations. A comparison of the predicted values based on the four constitutive equations was performed via relative error, average absolute relative error (AARE) and the correlation coefficient (R). These results show the modified Arrhenius-type equation and the modified Hensel–Spittel equation is more accurate and efficient with a similar prediction accuracy. The AARE-value of the two modified constitutive equation is relatively low under various strain rates and their fluctuation is small as the strain rate changes.

show abstract

“…The deformation inhomogeneity shows a difference in the microstructure and the mechanical properties of the processed materials [4]. The ECAP technique has been broadly investigated and analyzed using many different metals and their alloys [24][25][26][27][28][29][30][31]. The purpose of this study is to provide a more detailed mapping of the ECAP process through numerical modeling to study the effectively induced stress-strain behaviors and their distribution after multiple passes of ECAP processing of commercially pure aluminum.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Analyses of Equal Channel Angular Processing of Pure Aluminum

El-Garaihy¹

2020

Adv. Mater. Lett.

View full text Add to dashboard Cite

A constitutive model to describe high temperature flow behavior of AZ31B magnesium alloy processed by equal-channel angular pressing

Cited by 33 publications

References 20 publications

Flow characterization of magnesium alloy ZK61 during hot deformation with improved constitutive equations and using activation energy maps

Flow characterization of magnesium alloy ZK61 during hot deformation with improved constitutive equations and using activation energy maps

Constitutive Equations for Describing the Hot Compressed Behavior of TC4–DT Titanium Alloy

Numerical and Experimental Analyses of Equal Channel Angular Processing of Pure Aluminum

Contact Info

Product

Resources

About