Strain softening effects in texture and microstructure of torsioned pre-deformed Al rods
-
J. Kuśnierz
and
M. Kurowski
Abstract
The strain softening effect is exemplified on Al rods (99.8 wt.% purity) torsioned after pre-deformation by rolling, where that effect is most distinct. Observations of thin foils in Al rods, parallel to cross – sectional plane as well as along longitudinal section, were carried out on samples deformed up to the shear deformation φ = 0.645, i. e., near the end of the stress softening range, and on samples deformed up to the shear deformation φ = 5.193, i. e., near the maximum of the strain hardening range. In the strain softening range we have noted: (a) a decrease in dislocation density in the grain interior and in the grain boundary, and (b) formation of a strong (001)[110] shear texture component. Growing dislocation density and formation of axial ⟨111⟩+⟨100⟩ texture components were observed during torsion in the strain hardening range.
Abstract
Deformationsinduzierte Entfestigungseffekte werden aufgezeigt am Beispiel eines Torsionsversuches von Al-Stäben (Reinheit 99.8 Gew.%) nach Vorverformung durch Walzen, wo diese Effekte am deutlichsten auftreten. Die transmissionselektronenmikroskopischen Beobachtungen von Querschnitten (die auch zur Röntgenmessung der Polfiguren dienten) und Längsschnitten wurden an Proben durchgeführt, die um φ = 0.645 geschert wurden, d. h. nahe dem Ende des Entfestigungsintervalls. Das Gleiche wurde auch für Proben mit φ = 5.193 durchgeführt, d. h. nahe dem Maximum des Verfestigungsintervalls. Im Entfestigungsintervall beobachten wir: (a) Verminderung der Versetzungsdichte im Korninnern wie auch neben Korngrenzen und (b) Ausbildung einer scharfen (001)[110]-Scherkomponente. Eine erhöhte Versetzungsdichte und die Ausbildung einer ⟨111⟩ + ⟨100⟩-Fasertextur wurden während der Torsion im Verfestigungsbereich beobachtet.
Financial support from the Polish Committee for Scientific Research (KBN) /Grant No: 7 T08B 02109/ is acknowledged.
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© 2002 Carl Hanser Verlag, München
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- Notifications/Mitteilungen
- Personal/Personelles
- Information
- Conferences/Konferenzen
Articles in the same Issue
- Frontmatter
- Articles/Aufsätze
- Niobium bulk and grain boundary diffusion in alpha-iron
- Comparison of fatigue lives between grain boundaries and component single crystals of copper bicrystals
- Interfacial reaction between liquid Sn-20In-2.8Ag solder and Ag substrate
- Modelling the continuous cooling transformation diagram of engineering steels using neural networks
- Modelling the continuous cooling transformation diagram of engineering steels using neural networks
- Characterization of the metastable austenite in low-alloy FeCMnSi TRIP-aided steel by neutron diffraction
- Self-organized criticality – a model for recrystallization?
- Strain softening effects in texture and microstructure of torsioned pre-deformed Al rods
- Microstructural evolution in as-cast hypereutectic Al-Si alloys with different La additions
- Wear behaviour of graphitic aluminium composite sliding under dry conditions
- Temperature dependence of Young’s Modulus of alumina short fiber reinforced Zn–Al MMCs produced by pressure die-casting
- Notifications/Mitteilungen
- Personal/Personelles
- Information
- Conferences/Konferenzen
