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...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.展开更多
基金We thank the UK Research and Innovation(UKRI)for funding this work via the Future Leaders Fellowship(grant No.MR/T019123/2)Dikai Guan acknowledges the support from the Engineering and Physical Sciences Research Council(grant No.EP/L025213/1)+1 种基金the Royal Society International Exchanges 2021 Cost Share(grant No.IEC\NSFC\211323)Zhuoran Zeng acknowledges the support from the Australian National University Future Fellowship and the National Natural Science Foundation of China(grant No.U22A20187).
文摘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.
