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J Microsc. 2004 Mar;213(Pt 3):257-61.

In-situ investigation of grain boundary and triple junction kinetics in aluminium-10 p.p.m. magnesium.

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Institute for Physical Metallurgy and Metal Physics, RWTH Aachen, Kopernikusstr. 14, 52056 Aachen, Germany.


A special technique for in-situ observation and recording of triple junction motion is introduced. The described method makes it possible to study the motion of connected grain boundaries, i.e. triple junctions and their geometry. The results of an investigation of the steady-state motion of grain boundary systems with triple junctions in aluminium-magnesium are presented. The analysed triple junctions show a distinctive deviation of contact angle from the equilibrium value 120 degrees as assumed for the deviation of the Von Neumann-Mullins relation. The type of triple junction can have an essential influence on grain boundary motion and thus on grain growth.

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