Berlin 2005 – wissenschaftliches Programm

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M: Metallphysik

M 32: Poster TU B (Symposium Tomographic Methods in Materials Research M-32.32-55)

M 32.15: Poster

Montag, 7. März 2005, 14:30–16:30, Poster TU B

Curvature Driven Grain Boundary Motion in Aluminum. — •V.A. Ivanov¹, D.A. Molodov¹, L.S. Shvindlerman^1,2, and G. Gottstein¹ — ¹Institute of Physical Metallurgy and Metal Physics, RWTH Aachen University, 52056 Aachen, Germany — ²Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow Distr., 142432 Russia

The motion of individual grain boundaries under a constant driving force was studied in Al-bicrystals. In this technique the curved grain boundary moves along the lateral surface of the specimen forming a triple junction No-dqfree surface - boundary - free surfaceNo-dq during its motion.

Migration of different grain boundaries was measured in-situ utilizing orientation contrast in the SEM. The character of grain boundaries studied was described in terms of the crystallographic planes of the adjacent grains. In the current study, both effects the No-dqsurfaceNo-dq triple junction and the boundary character on steady state motion are considered. The effect of the junction is discussed with the criterion Λ which defines the influence of a triple junction on the motion of the attached grain boundaries. To describe the effect of boundary character, the shape of moving grain boundary was analyzed.