Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of strain-induced precipitation on the low angle grain boundary in AA7050 aluminum alloy
Highlights ► Experimental two-pass deformation process is different from conventional rolling. ► Globular precipitates were accelerated to produce by first-pass deformation. ► Second-pass deformation produced low angle grain boundaries owing to precipitates. ► Microstructure with numerous sub-structures had increased strength and ductility.
Abstract Effects of the particles induced by strain on dynamic recrystallization and microstructure of the AA7050 aluminum alloy were investigated during hot deformation using X-ray diffraction (XRD), transmission electron microscopy (TEM) and electron back-scattered diffraction (EBSD). Experimental results showed that partial recrystallized grains containing little sub-structure were produced during the solution treatment. Numerous particles were successfully obtained by the strain-induced precipitation during first-pass deformation at 573K. The deformation promoted spheroidization and refinement of the precipitate particles. Then these particles pinned dislocations and grain boundaries inhibiting dynamic recrystallization during second-pass high-temperature deformation at 673K and low angle grain boundary fraction was increased significantly to 83.8%. Furthermore, the tensile test indicated that microstructure with numerous low angle boundaries (LAGBs) and 5μm sub-grains had increased the strength and ductility of the AA7050 aluminum alloy.
Effect of strain-induced precipitation on the low angle grain boundary in AA7050 aluminum alloy
Highlights ► Experimental two-pass deformation process is different from conventional rolling. ► Globular precipitates were accelerated to produce by first-pass deformation. ► Second-pass deformation produced low angle grain boundaries owing to precipitates. ► Microstructure with numerous sub-structures had increased strength and ductility.
Abstract Effects of the particles induced by strain on dynamic recrystallization and microstructure of the AA7050 aluminum alloy were investigated during hot deformation using X-ray diffraction (XRD), transmission electron microscopy (TEM) and electron back-scattered diffraction (EBSD). Experimental results showed that partial recrystallized grains containing little sub-structure were produced during the solution treatment. Numerous particles were successfully obtained by the strain-induced precipitation during first-pass deformation at 573K. The deformation promoted spheroidization and refinement of the precipitate particles. Then these particles pinned dislocations and grain boundaries inhibiting dynamic recrystallization during second-pass high-temperature deformation at 673K and low angle grain boundary fraction was increased significantly to 83.8%. Furthermore, the tensile test indicated that microstructure with numerous low angle boundaries (LAGBs) and 5μm sub-grains had increased the strength and ductility of the AA7050 aluminum alloy.
Effect of strain-induced precipitation on the low angle grain boundary in AA7050 aluminum alloy
Lang, Yujing (Autor:in) / Cai, Yuanhua (Autor:in) / Cui, Hua (Autor:in) / Zhang, Jishan (Autor:in)
14.04.2011
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Effect of strain-induced precipitation on the low angle grain boundary in AA7050 aluminum alloy
| British Library Online Contents | 2011
Enhanced grain refinement in AA7050 Al alloy by deformation-induced precipitation
| British Library Online Contents | 2012
The Effect of Strain Localization on Galvanic Corrosion Pitting in AA7050
| British Library Online Contents | 2018
Grain Boundary Segregation and Precipitation in Aluminum Alloy AA6061
| British Library Online Contents | 2006
On the relationship between microstructure, strength and toughness in AA7050 aluminum alloy
| British Library Online Contents | 2003