Thickness-related synchronous increase in strength and ductility of ultrafine-grained pure aluminum sheets

2019 ◽  
Vol 26 (11) ◽  
pp. 1450-1456 ◽  
Author(s):  
Ying Yan ◽  
Guo-qiang Zhang ◽  
Li-jia Chen ◽  
Xiao-wu Li
Keyword(s):  
Pure Aluminum ◽  
Aluminum Sheets ◽  
Ultrafine Grained ◽  
Strength And Ductility

Ultrafine grained Ti-based composites with ultrahigh strength and ductility achieved by equiaxing microstructure

2015 ◽  
Vol 79 ◽  
pp. 1-5 ◽  
Author(s):  
L.H. Liu ◽  
C. Yang ◽  
F. Wang ◽  
S.G. Qu ◽  
X.Q. Li ◽  
...  
Keyword(s):  
Ultrahigh Strength ◽  
Ultrafine Grained ◽  
Strength And Ductility

Micro-Embossing Process in Ultrafine-Grained Pure Aluminum Processed by Equal-Channel Angular Pressing with Elevated Temperature

2019 ◽  
Vol 821 ◽  
pp. 244-249
Author(s):  
Qian Su ◽  
Jie Xu ◽  
Lei Shi ◽  
De Bin Shan ◽  
Bin Guo
Keyword(s):  
Equal Channel Angular Pressing ◽  
Deformation Temperature ◽  
Pure Aluminum ◽  
Confocal Scanning Laser Microscopy ◽  
Electron Backscattered Diffraction ◽  
Angular Pressing ◽  
Ultrafine Grained ◽  
Scanning Laser Microscopy ◽  
Confocal Scanning ◽  
Confocal Scanning Laser

Micro-embossing tests were performed on ultrafine-grained pure Al processed by equal-channel angular pressing (ECAP) with 100 μm width of female die at different deformation temperature ranging from 298 K to 523 K under a force of 5 kN. The filling height, surface topography and microstructure of the cross section were measured by confocal scanning laser microscopy (CSLM), scanning electron microscopy (SEM) and electron backscattered diffraction (EBSD), respectively. The effects of deformation temperature on formability of ultrafine-grained (UFG) pure Al during micro-embossing were analyzed. The results show that increase in deformation temperature can improve the formability of UFG pure Al on micro-embossing. Micro hot embossing of UFG pure aluminum is characterized by the rib sidewall, surface quality, and fully transferred patterns, which shows ultrafine-grained pure Al has potential application in micro-forming.

FINITE ELEMENT ANALYSIS OF CONSTRAINED GROOVE PRESSING OF PURE ALUMINUM SHEETS

2013 ◽  
Vol 02 (01) ◽  
pp. 1350001 ◽  
Author(s):  
S. S. SATHEESH KUMAR ◽  
I. BALASUNDAR ◽  
T. RAGHU
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Plastic Strain ◽  
Deformation Behavior ◽  
Strain Distribution ◽  
Pure Aluminum ◽  
Detailed Examination ◽  
Deformation Characteristics ◽  
Element Analysis ◽  
Aluminum Sheets

Constrained groove pressing (CGP) is an attractive severe plastic deformation technique capable of processing ultrafine grained/nanostructured sheet materials. The deformation behavior of pure aluminum during constrained groove pressing is investigated by carrying out a two-dimensional finite element analysis (FEA). FEA predicted deformation behavior observed during each stages of pressing indicated almost negligible deformation in flat regions, whereas the inclined shear regions revealed diverse deformation characteristics. The plastic strain distributions unveiled inhomogeneous strain distribution at the end of one pass. Detailed examination of plastic strain evolution during CGP along various sections divulged superior strain distribution along middle surfaces when compared to top and bottom surfaces. The degree of strain homogeneity is evaluated quantitatively along different regions of the sheet and is correlated to the deformation characteristics. Load–stroke characteristics obtained during corrugating and flattening of sheets exhibited three stages and two stages behavior, respectively. The results obtained from the analysis are experimentally validated by processing pure aluminum sheets by CGP and the measured deformation homogeneity is benchmarked with FEA results.

Bi-modally structured pure aluminum for enhanced strength and ductility

2015 ◽  
Vol 83 ◽  
pp. 493-498 ◽  
Author(s):  
Amal M.K. Esawi ◽  
Nesma T. Aboulkhair
Keyword(s):  
Pure Aluminum ◽  
Strength And Ductility

Microstructure and Mechanical Properties of Twist Extruded Pure Aluminum Processed by Post-Rolling

2011 ◽  
Vol 264-265 ◽  
pp. 183-187 ◽  
Author(s):  
S. Ranjbar Bahadori ◽  
Seyed Ali Asghar Akbari Mousavi ◽  
A.R. Shahab
Keyword(s):  
Grain Size ◽  
Pure Aluminum ◽  
Rolling Process ◽  
Extrusion Process ◽  
Ultrafine Grained ◽  
Twist Extrusion ◽  
Aluminum Sample ◽  
Deformation Processes ◽  
Ultrafine Grained Materials ◽  
Extrusion Method

Interest in processing of bulk ultrafine-grained materials has grown significantly over the last years. Severe plastic deformation processes such as twist extrusion have been the essence of these researches and used to decrease the bulk grain size. The bulk gain size can reduce if twist extrusion process combines with a conventional forming technique. In this study, the effects of reduction by employing the rolling process after the twist extrusion method were considered. The twist extrusion process of the commercially pure aluminum sample was carried out using a twisted die with 60º die angle, and the samples were processed through rolling subsequently. As a result of rolling, average microstructure grain size decreased significantly and the hardness amount increased accordingly

Effects of Driving Force and Boundary Migration Velocity on Formation of Recrystallization Texture in Cold Rolled Pure Aluminum Sheets

2013 ◽  
Vol 753 ◽  
pp. 257-262 ◽  
Author(s):  
Wei Min Mao ◽  
Ping Yang
Keyword(s):  
Grain Growth ◽  
Driving Force ◽  
Recrystallization Texture ◽  
Pure Aluminum ◽  
Solute Drag ◽  
Texture Formation ◽  
Oriented Growth ◽  
Aluminum Sheets ◽  
Zener Drag ◽  
Cold Rolled

The effects of net driving force for migration of high angle grain boundaries were emphasized beside many other factors which could influence the process of texture formation during recrystallization annealing of 95% cold rolled pure aluminum sheets. The net driving force consists basically of stored energy. However, it could be reduced by recovery, boundary drag, solute drag and Zener drag in different extents, in which only boundary drag is mis-orientation dependent. It was indicated that both oriented nucleation and oriented growth have obvious influence on recrystallization texture, and how far they influence the texture depends also on the level of net driving force when the grain growth starts during annealing. Oriented growth, which is induced by the differences in boundary drag of differently oriented grains, and the corresponding texture formation, could be observed easily when the recrystallization proceeds under relative higher solute drag and Zener drag in commercial purity aluminum. The oriented nucleation process prevails during recrystallization of sufficiently recovered high purity aluminum with very low solute drag and Zener drag, after which strong cube texture forms. In this case the oriented growth indicates limited effect. Both the oriented growth and oriented nucleation will fail if high purity deformation matrix without clear solute drag and Zener drag has not experienced an obvious recovery before recrystallization grain growth, since extremely high net driving force leads to very small critical nucleus size and multiplicity of growing grains, which results in randomization of recrystallization texture.

1315 Mechanism of Fatigue Crack Path in Anisotropic Commercial Pure Aluminum Sheets

2005 ◽  
Vol 2005.1 (0) ◽  
pp. 141-142
Author(s):  
Yudy Surya IRAWAN ◽  
Yoshihiko HAGIWARA ◽  
Shin-ichi OHYA
Keyword(s):  
Fatigue Crack ◽  
Crack Path ◽  
Pure Aluminum ◽  
Aluminum Sheets ◽  
Commercial Pure Aluminum
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