Evaluation of hot deformation characteristics in modified AA5052 using processing map and activation energy map under deformation heating

Son, Kwang‐Tae; Kim, Myoung-Hun; Kim, Sang–Wook; Lee, Ji‐Woon; Hyun, Soong‐Keun

doi:10.1016/j.jallcom.2017.12.357

Cited by 53 publications

(9 citation statements)

References 32 publications

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“…The variation of η was indicated by the different levels of contour numbers, and the shaded region means the negative values of flow instability ( ξ ). It is found in Figure that a larger shaded region is located at 950–1150 °C/10 −0.5 –5 s −1 , which region normally has to do with the flow instabilities, including dynamic strain aging, micro‐cracking, and flow localization . Moreover, the instability region tends to become larger with the rise of strain, while the similar trend is also found with the distribution of η .…”

Section: Resultssupporting

confidence: 55%

“…Yu et al developed the processing map for 6A02 aluminum alloy . Kwang‐Tas Son et al constructed the processing map of AA5052 aluminum alloy, and found that the dynamic recovery made great contribution to both the higher power dissipation efficiency and lower level of activation energy. However, in terms of FEM, very limited efforts have been directed for the hot deformation behavior of AFA alloys.…”

Section: Introductionmentioning

confidence: 99%

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High Temperature Deformation Characteristics of an Alumina‐Forming Stainless Steel

Luo

Yang

Bian

et al. 2019

steel research int.

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This investigation study deformation characteristics of an innovative stainless steel, alumina-forming austenitic (AFA) Fe-20Cr-30Ni-0.6Nb-2Al-Mo steel, at elevated temperature, and those isothermal hot compression tests are performed with various temperatures and strain rates. The results show that as the temperature decreases (or as strain rate rised), the stress level increases. On the other hand, in order to better predict the flow stress behavior, a modified constitutive relationship model is established based on the strain-compensated Arrhenius-type equation, and the accuracy of this modified model is examined statistically. Furthermore, by comparing with the experimental results, this modified constitutive model is proved to be able to precisely predict the high temperature flow behaviors of the AFA alloy. In addition, processing maps of this alloy are also constructed, and expanded instability regions are found with higher strain rate values (above 0.18 s À1 ). Moreover, from the microstructure characterization, the features of both adiabatic shear bands and flow localization are formed in those samples of instability regions. Eventually, the optimum high temperature deformation parameters can be determined as

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Section: Resultssupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

High Temperature Deformation Characteristics of an Alumina‐Forming Stainless Steel

Luo

Yang

Bian

et al. 2019

steel research int.

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“…Deformation temperature and strain rate are important factors controlling the hot deformation flow stress. The hyperbolic sinusoidal constitutive equation in the Arrhenius model has been widely used to describe the complex relationships among flow stress, heat distortion temperature, and strain rate [8][9][10][11][12][13][14][15][16][17][18][19]27]. Sellars and McTegart proposed the use of a hyperbolic sine function including the thermal deformation activation energy Q and temperature T to describe the thermal activation behavior of the material.…”

Section: Constitutive Equationsmentioning

confidence: 99%

“…The thermo-mechanical processing maps (PMs) were extensively used to describe the microstructure evolution and establish the processing window, which provide guides for the industrial manufacturing such as rolling, extrusion, and forging [10,14,32,33]. PMs can be obtained by the dissipation power diagram and the processing instability diagram.…”

Section: Processing Mapmentioning

confidence: 99%

“…In addition, the hot processing map is constructed to predict the plastic deformation mechanism and the unstable deformation domain in various deformation conditions, which provides insights into the optimization of thermo-mechanical processing. This method has been widely used in various alloys, such as Al alloys [8][9][10], Mg alloys [11][12][13], Ti alloys [14][15][16], and steel [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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Hot Deformation Behavior of a New Al–Mn–Sc Alloy

et al. 2019

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The hot deformation behavior of a new Al–Mn–Sc alloy was investigated by hot compression conducted at temperatures from 330 to 490 °C and strain rates from 0.01 to 10 s−1. The hot deformation behavior and microstructure of the alloy were significantly affected by the deformation temperatures and strain rates. The peak flow stress decreased with increasing deformation temperatures and decreasing strain rates. According to the hot deformation behavior, the constitutive equation was established to describe the steady flow stress, and a hot processing map at 0.4 strain was obtained based on the dynamic material model and the Prasad instability standard, which can be used to evaluate the hot workability of the alloy. The developed hot processing diagram showed that the instability was more likely to occur in the higher Zener–Hollomon parameter region, and the optimal processing range was determined as 420–475 °C and 0.01–0.022 s−1, in which a stable flow and a higher power dissipation were achieved.

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Dynamic Recrystallization Behavior of 7056 Aluminum Alloys during Hot Deformation

Shi¹,

Zhang²,

Li³

et al. 2022

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Evaluation of hot deformation characteristics in modified AA5052 using processing map and activation energy map under deformation heating

Cited by 53 publications

References 32 publications

High Temperature Deformation Characteristics of an Alumina‐Forming Stainless Steel

High Temperature Deformation Characteristics of an Alumina‐Forming Stainless Steel

Hot Deformation Behavior of a New Al–Mn–Sc Alloy

Dynamic Recrystallization Behavior of 7056 Aluminum Alloys during Hot Deformation

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