Numerical modelling of the generation of active surfaces of deep drawing dies

Tabacaru, V.; Oancea, Nicolae

doi:10.1016/s0924-0136(01)00747-6

Cited by 2 publications

(1 citation statement)

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“…For this alloy, it has been suggested that twinning, and more particularly compression twinning, is the primary mechanism for through-thickness contraction deformation [2,3]. The evolution of microstructure for a range of temperatures has been previously explored for the AZ31B alloy [4], and improved ductility has been observed in various Mg alloys at elevated temperatures [5][6][7]. Barnett explained this as a result of enhanced activity of non-basal slip [8].…”

Section: Introductionmentioning

confidence: 99%

Microstructure Correlation with Formability for Biaxial Stretching of Magnesium Alloy AZ31B at Mildly Elevated Temperatures

Chelladurai

Miles

Fullwood

et al. 2017

JOM

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Magnesium AZ31B sheets of 2 mm thickness were stretch formed using a 101.6 mm diameter punch at temperatures from 25°C-150°C, in 25°C increments. Surface strains were measured using a digital image correlation (DIC) method. The punch height vs load curve was found to be the same for temperatures of 25°C and for 50°C, while at 75°C and above the load for a given punch height started to decrease, indicating a potential change in deformation mechanism. Electron Backscatter Diffraction (EBSD) was used to quantify features of the microstructure in the tested specimens. In particular, the gradual decrease in twinning activity due to easier thermally activated slip with increasing temperatures is quantified across this range. Moreover, twin activity was found to predominantly involve the formation of {101 � 1} compression twins that rapidly transform to create secondary twins for easier strain accommodation.

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