ELECTRON MICROSCOPIC OBSERVATION ON THE DISLOCATION CONFIGURATION CORRELATIVE WITH THE HIGH-TEMPERATURE INTERNAL-FRICTION PEAK IN 99.999 wt % SINGLE-CRYSTAL ALUMINIUM

J. Shi , L. Zhang , T. Kê

The dislocation structure in sheet specimens of 99.999 wt % aluminium single crystals was observed by transmission electron microscope (TEM) in order to explore the micromechanism corresponding to the appearance and disappearance of the internal-friction peak around 365°C (f = 1 HZ). /1/ Internal-friction measurements were made with an inverted torsion pendulum on sheet specimens having a thickness of 1 mm or smaller and a width of 4.5 mm. The same specimen was thinned down after the internal-friction measurements by chemical polishing and a double jet electrolytic polishing to films about 700 nm thick for TEM observations. The results of internal-friction measurements were compared with TEM observations.

Domaines: Articles anciens

J. Shi, L. Zhang, T. Kê. ELECTRON MICROSCOPIC OBSERVATION ON THE DISLOCATION CONFIGURATION CORRELATIVE WITH THE HIGH-TEMPERATURE INTERNAL-FRICTION PEAK IN 99.999 wt % SINGLE-CRYSTAL ALUMINIUM. Journal de Physique Colloques, 1985, 46 (C10), pp.C10-355-C10-358. ⟨10.1051/jphyscol:19851079⟩. ⟨jpa-00225464⟩