A Role of Low Energy Grain Boundaries in the Abnormal Grain Growth in Fe-3%Si Alloy

Abstract

Low energy grain boundaries were considered to be important in abnormal grain growth by theoretical deduction. The disorientation angles and coincidence site lattice grain boundaries distribution of more than 20 Goss grains and their neighboring matrix grains in primary recrystallized Fe-3%Si alloy were investigated using an electron backscatter diffraction method. It was found that the frequency of low energy grain boundaries of Goss grains which are more likely to abnormally grow are higher than their neighboring matrix grains, which indicated that low energy grain boundaries play a dominant role in the abnormal grain growth of Fe-3%Si alloy. The result meets well with the abnormal grain growth theory.

Growth of preexisting abnormal grains in molybdenum under static and dynamic conditions

“…Many of the mechanisms proposed in the literature for SAGG are based on the idea that differences in the mobility of boundaries between grains cause some grains to preferentially grow at the expense of others [3,[32][33][34][35][36]. A grain's orientation relative to the majority texture is thought to significantly influence the mobility of its boundaries by controlling boundary character [32].…”

Abnormal grain growth during annealing in the Al/Al2O3 composite produced by accumulative roll bonding

“…The CSL boundaries have higher mobility and lower energy compared to the general grain boundaries [20]. Therefore, Coincident Site Lattice boundaries have less capability compared to Zenner Pinning [21].…”