Development of through-thickness texture gradient and persistence of shear-type textures during annealing of commercial purity aluminium sheet processed by accumulative roll-bonding

2018 ◽  
Vol 34 (5) ◽  
pp. 821-831 ◽  
Author(s):  
Saiyi Li ◽  
Liang Yang ◽  
Nan Qin
Keyword(s):  
Accumulative Roll Bonding ◽  
Texture Gradient ◽  
Commercial Purity ◽  
Roll Bonding ◽  
Aluminium Sheet ◽  
Purity Aluminium ◽  
Shear Type ◽  
Commercial Purity Aluminium

Effect of Accumulative Roll Bonding Process with Inter-Cycle Heat Treatment on Microstructure and Microhardness of AA1050 Alloy

2012 ◽  
Vol 531-532 ◽  
pp. 623-626 ◽  
Author(s):  
Mojtaba Dehghan ◽  
Fathallah Qods ◽  
Mahdi Gerdooei
Keyword(s):  
Accumulative Roll Bonding ◽  
Metal Forming ◽  
High Strength ◽  
Hardness Measurement ◽  
Rolling Process ◽  
Large Plastic Strain ◽  
Roll Bonding ◽  
Fine Grained ◽  
Purity Aluminium ◽  
Commercial Purity Aluminium

Processes with severe plastic deformation (SPD) may be defined as metal forming processes in which ultra-large plastic strain is introduced into a bulk metal in order to create ultra-fine grained (UFG) metals. Accumulative roll bonding (ARB) is a SPD process that may be defined as multisteps rolling process in order to create high strength metals with UFG structure. In this study, ARB process with inter-cycle annealing is carried out on the commercial purity aluminium (AA1050) sheet up to 13 cycles. The purpose of the present study is investigation of microhardness behavior and microstructural evolution in the ARB processed AA1050 sheet. Micro-Vickers hardness measurement is carried out throughout thickness of the ARB processed sheets. In addition, with increasing ARB cycles the grains size is reduced in nanometer level.

Nanostructured Aluminium - Recovery and Recrystallization

2007 ◽  
Vol 558-559 ◽  
pp. 201-206 ◽  
Author(s):  
Niels Hansen ◽  
X. Huang ◽  
Andrew Godfrey
Keyword(s):  
High Strain ◽  
Annealing Process ◽  
Commercial Purity ◽  
Hardness Testing ◽  
Microstructural Investigation ◽  
Annealing Behavior ◽  
Roll Bonding ◽  
Purity Aluminium ◽  
Commercial Purity Aluminium

The isochronal annealing behavior of nanostructured commercial purity aluminium (AA1100 and AA1200) following either cold – rolling or accumulative roll bonding up to an ultra high strain of εvM = 6.2 (99.5% reduction in thickness) has been studied via hardness testing and by a microstructural investigation. A large effect of rolling strain is observed on the recovery at temperatures below approx. 200 °C. At higher temperatures an assessment of the changes in hardness and microstructure leads to a characterization of the annealing process as one of conventional (discontinuous) recrystallization.

scholarly journals Orientation Independent and Dependent Subgrain Growth During Iso-Thermal Annealing of High-Purity and Commercial Purity Aluminium

Metals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1032
Author(s):  
Bunkholt ◽  
Nes ◽  
Marthinsen
Keyword(s):  
High Purity ◽  
Electron Backscatter Diffraction ◽  
Subgrain Size ◽  
Alloy System ◽  
Commercial Purity ◽  
Boundary Misorientation ◽  
Subgrain Growth ◽  
Purity Aluminium ◽  
Commercial Purity Aluminium ◽  
High Purity Aluminium

The orientation dependence on recovery has been studied in cold-rolled and annealed polycrystalline high-purity aluminium (99.99 wt%), binary Al-0.25Mn and commercial purity aluminium. The growth mechanisms were found to be independent of the alloy system and the microchemistry only influences the coarsening kinetics. Orientation-dependent subgrain growth, mainly studied in high-purity aluminium and measured in lamellar bands of uniform orientation, occurs in three distinct ways, depending of the size of the local orientation gradients. Following the evolution in average subgrain size and boundary misorientation by detailed electron backscatter diffraction (EBSD) characterization during annealing, it was found that the rate of subgrain growth in Cube- and Goss-oriented grains were faster than in the typical deformation texture components, particularly after an incubation time when discontinuous subgrain growth occurs. In commercial purity aluminium, general orientation-independent subgrain growth is faster than the orientation-dependent growth because more growth occurs in regions near high-angle grain boundaries separating differently oriented lamellar bands. It appears as if subgrains misoriented by more than 3.5° have a growth advantage over less misoriented subgrains, typically in the interior of lamellar bands. While the average boundary misorientations are decreasing, the individual boundary misorientations are increasing.

Mechanical properties and microstructure of ultrafine grained commercial purity aluminium prepared by cryo-hydrostatic extrusion

2017 ◽  
Vol 695 ◽  
pp. 178-192 ◽  
Author(s):  
Wacek Pachla ◽  
Mariusz Kulczyk ◽  
Julita Smalc-Koziorowska ◽  
Monika Wróblewska ◽  
Jacek Skiba ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hydrostatic Extrusion ◽  
Commercial Purity ◽  
Ultrafine Grained ◽  
Purity Aluminium ◽  
Commercial Purity Aluminium
Sign in / Sign up

Export Citation Format

Share Document