@misc{nebebemekonen_mechanical_characterisation_2009, 
author={Nebebe Mekonen, M.,Bohlen, J.,Steglich, D.,Letzig, D.},
title={Mechanical Characterisation of Mg Alloys and Model Parameter Identification for Sheet Forming Simulations},
year={2009},
howpublished = {journal article},
doi = {https://doi.org/10.1007/s12289-009-0437-5},
abstract = {The understanding of forming process of Mg alloys at elevated temperatures can be enhanced with help of numerical simulations. As such a constitutive model was implemented in a finite element frame work. For calibration of the constitutive response mechanical characterisation of Mg alloys were performed. The mechanical characterisation employed uni-axial tensile tests of two Mg alloys, namely AZ31 and ZE10 in heat treated condition, at room temperature (RT) and 200°C. The uni-axial tensile test at 200°C compared to those at RT revealed an increase in ductility but also a decrease in yield strength. Planar anisotropy was recorded in terms of differences in yield stresses as well as r-values between three different material orientations. It was also observed that the planar anisotropy is affected by the test temperatures. The r-values, especially at 200°C, found to be dependent on the accumulated strain. This observation is contrary to the usual practice of assuming a constant r-value. Using the test results the constitutive model parameters were identified.},
note = {Online available at: \url{https://doi.org/10.1007/s12289-009-0437-5} (DOI). Nebebe Mekonen, M.; Bohlen, J.; Steglich, D.; Letzig, D.: Mechanical Characterisation of Mg Alloys and Model Parameter Identification for Sheet Forming Simulations. International Journal of Material Forming. 2009. vol. 2, no. S1, 53-56. DOI: 10.1007/s12289-009-0437-5}}