3D processing map and hot deformation behavior of 6A02 aluminum alloy

Sun, Yu; Cao, Zhuohan; Wan, Zhipeng; Hu, Lianxi; Ye, Wenhong; Li, Niankui; Fan, Congbin

doi:10.1016/j.jallcom.2018.01.299

Cited by 106 publications

(20 citation statements)

References 26 publications

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“…In addition, the flow stress decreased substantially with increasing temperatures and reducing strain rates. This indicates the dynamic softening is more sufficient at high temperatures and low strain rates, which is consistent with the previous observations in other hot compressed Al alloys [25,26]. Dynamic softening, including dynamic recovery (DRV) or dynamic recrystallization (DRX), reduces the dislocation…”

Section: Hot Deformation Behaviorsupporting

confidence: 91%

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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Section: Hot Deformation Behaviorsupporting

confidence: 91%

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

et al. 2019

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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%

“…The efficiency of power dissipation ( η ) means the percentage of power dissipated during microstructural transformation. The larger the value of the η is, the better the workability of the material is . The η could be described as follows:

η = \frac{J}{J_{max}} = \frac{2 m}{m + 1}

where m represents the strain rate sensitivity.…”

Section: Resultsmentioning

confidence: 99%

“…For example, Le et al studied the hot deformation characteristics of 25Cr3Mo3NiNb steel, and the optimum processing condition were obtained based on the processing maps. 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.…”

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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“…It is commonly known that the processing map is a useful technique to investigate the flow stress and optimize the hot processing parameters [16][17][18][19][20][21]. Although the conventional 2D plots can exhibit instability zones and efficiency contours at different hot working parameters, unable to reveal the influence of strain in one visual representation [15,22]. Therefore, the 3D processing map is established to reflect the effect of strain at various thermomechanical conditions [15], which can reveal the relevance between microstructural evolution and processing map.…”

Section: Introductionmentioning

confidence: 99%

Exploring the influence of Al content on the hot deformation behavior of Fe-Mn-Al-C steels through 3D processing map

Tang

Chen

et al. 2019

Vacuum

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The effect of Al content on the hot deformation behavior of high-Mn low density Fe-Mn-Al-C steels was investigated by the 3D processing map at the temperatures of 850-1050 °C and the strain rates of 0.001-10s-1. The high-Al steel showed a higher flow stress and a greater activation energy (443 kJ/mol) in contrast to the low-Al steel (394 kJ/mol). The microstructures of 8Al steel and 10Al steel depends on the deformation parameters. The initial hot rolling microstructure has been displaced by the recrystallized structure and substructures for both steels, while the unstable zone has deformation bands and flow localization. As the Z content increases with increasing Al content, this leads to a significant inhibition of the DRX process, resulting in an unstable domain with deformation zones and flow localization. For high-Al steel, the morphology and distribution of ferrite transform from the continuous band ferrite to discontinuous granular ferrite, moreover, the flow localization features cannot be observed with the decrease of strain rate to 0.001s-1. Furthermore, the proportion of instability region for each of the strains increases with the increasing of the Al content, the high Al content weakens the workability of the Fe-Mn-Al-C steels.

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3D processing map and hot deformation behavior of 6A02 aluminum alloy

Cited by 106 publications

References 26 publications

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

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

High Temperature Deformation Characteristics of an Alumina‐Forming Stainless Steel

Exploring the influence of Al content on the hot deformation behavior of Fe-Mn-Al-C steels through 3D processing map

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