TY - GEN
T1 - Superplastic forming response of a friction stir processed Mg alloy sheet - A numerical approach
AU - Albakri, Mohammad
AU - Mansoor, Bilal
AU - Albakri, Ahmad
AU - Khraisheh, Marwan
PY - 2013
Y1 - 2013
N2 - Friction stir process (FSP) is a severe plastic deformation based secondary processing technique that can be utilized to engineer novel microstructures in metallic alloys. It is well known that such techniques are cumbersome and require significant experimental work and material to determine optimum processing conditions. Therefore in this work, we propose a new two step numerical approach, where: (i) CFD simulations coupled with Zener-Holloman relation are used to predict microstructure evolution in stirred, transition and heat affected zones of friction stir processed AZ31 Mg alloy sheets, (ii) Finite element simulations are carried out to evaluate superplastic forming characteristics of different microstructures developed after FSP. Simulation trends including forming pressure profiles, dome height evolution, and thickness distribution of friction stir processed sheets are compared with those of the base material. The proposed combination of numerical approaches to model both processing and forming aspects yields a powerful tool to study and optimize processing and forming technologies with limited experimentation.
AB - Friction stir process (FSP) is a severe plastic deformation based secondary processing technique that can be utilized to engineer novel microstructures in metallic alloys. It is well known that such techniques are cumbersome and require significant experimental work and material to determine optimum processing conditions. Therefore in this work, we propose a new two step numerical approach, where: (i) CFD simulations coupled with Zener-Holloman relation are used to predict microstructure evolution in stirred, transition and heat affected zones of friction stir processed AZ31 Mg alloy sheets, (ii) Finite element simulations are carried out to evaluate superplastic forming characteristics of different microstructures developed after FSP. Simulation trends including forming pressure profiles, dome height evolution, and thickness distribution of friction stir processed sheets are compared with those of the base material. The proposed combination of numerical approaches to model both processing and forming aspects yields a powerful tool to study and optimize processing and forming technologies with limited experimentation.
KW - FEM
KW - Friction stir processing
KW - Grain refinement
KW - Layered microstructure
KW - Superplasticity
UR - http://www.scopus.com/inward/record.url?scp=84873037583&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.735.192
DO - 10.4028/www.scientific.net/MSF.735.192
M3 - Conference contribution
AN - SCOPUS:84873037583
SN - 9783037855539
T3 - Materials Science Forum
SP - 192
EP - 197
BT - Superplasticity in Advanced Materials - ICSAM 2012
PB - Trans Tech Publications Ltd
T2 - 11th International Conference on Superplasticity in Advanced Materials, ICSAM 2012
Y2 - 3 July 2012 through 5 July 2012
ER -