Abstract
Recrystallization annealing is widely used to tailor the microstructure and enhance the performance of cold-deformed metallic materials.However,the underlying recrystallization mechanisms are debated,even with the use of cutting-edge characterization techniques.Here,we develop a Track-Rex toolbox to analyze quasi-in-situ electron backscatter diffraction(EBSD)datasets of two magnesium(Mg)alloys dur-ing static recrystallization via grain correlation.The results show that the recrystallized grains do not always grow;instead,they can shrink or even be consumed.This is attributed to the presence of newly formed recrystallized grains that possess a growth advantage over the old recrystallized grains.The rare earth containing Mg-2.4Zn-0.2Ce wt.％(ZE20)alloy exhibits a higher nucleation activity in the shear bands compared to the commercial Mg-3Al-1 Zn(AZ31)alloy.Regardless of the nucleation timing and sites,re-crystallized grains in the ZE20 alloy show consistent off-basal orientations,serving as the origin of the rare earth texture.Moreover,the off-basal texture of these recrystallized grains is further strengthened through preferential growth during subsequent annealing.On the contrary,the recrystallized grains in the AZ31 exhibit scattered basal orientations that grow uniformly,resulting in a weak basal texture.
基金项目
UK Research and Innovation(UKRI)()
Future Leaders Fellowship(MR/T019123/2)
Engineering and Physical Sciences Research Council(EP/L025213/1)
Royal Society International Exchanges 2021 Cost Share(IEC\NSFC\211323)
Australian National University Future Fellowship()
National Natural Science Foundation of China(U22A20187)
NETL
NSTL
万方数据