Date | Time
07/10/2013 | All Day
Â« Grain subdivision mechanisms in aluminium and magnesium Â»
Prof. Matthew BARNETT â€“ Deakin University, Australia,Chercheur dâ€™Excellence â€“ Lorraine â€“ DAMAS LEM3
Abstract It is well known that grains subdivide during deformation. In so doing, wrought materials obtain new microstructures and significant changes occur in the stresses required for continued processing. In this talk, two separate grain subdivision mechanisms are discussed. A simple mechanism for continuous dynamic recrystallization in aluminium during hot working is presented and some basic principles of twinning in magnesium are examined. In both cases new crystallites surrounded entirely by high angle boundaries are formed. Finally, the importance of the second mechanism for understanding the strength of magnesium is discussed.