The rate of strain-induced boundary migration (SIBM), which appears during small strains in carbon steel under the critical strain for dynamic recrystallization, was measured through in situ observation at high temperatures. The rate of SIBM measured was much higher than the rate of grain growth without strain. The in situ observation method confirms that SIBM could be initiated by strains as small as 0.015.

Strain-Induced Boundary Migration of Carbon Steel at High Temperatures. Y.Yogo, H.Takeuchi, T.Ishikawa, N.Iwata, K.Nakanishi: Scripta Materialia, 2009, 61[11], 1001-3