Microstructures and mechanical properties of ultrafine grained 7075 Al alloy processed by ECAP and their evolutions during annealing

2004 ◽  
Vol 52 (15) ◽  
pp. 4589-4599 ◽  
Author(s):  
Y.H. Zhao ◽  
X.Z. Liao ◽  
Z. Jin ◽  
R.Z. Valiev ◽  
Y.T. Zhu
Keyword(s):  
Mechanical Properties ◽  
Al Alloy ◽  
7075 Al Alloy ◽  
Ultrafine Grained ◽  
Microstructures And Mechanical Properties

Enhanced mechanical properties in ultrafine grained 7075 Al alloy

2005 ◽  
Vol 20 (2) ◽  
pp. 288-291 ◽  
Author(s):  
Y.H. Zhao ◽  
X.Z. Liao ◽  
Y.T. Zhu ◽  
R.Z. Valiev
Keyword(s):  
Mechanical Properties ◽  
Natural Aging ◽  
Al Alloys ◽  
Coarse Grained ◽  
Tensile Yield Strength ◽  
Al Alloy ◽  
Aged Sample ◽  
Angular Pressing ◽  
7075 Al Alloy ◽  
Ultrafine Grained

Highest strength for 7075 Al alloy was obtained by combining the equal-channel-angular pressing (ECAP) and natural aging processes. The tensile yield strength and ultimate strength of the ECAP processed and naturally aged sample were 103% and 35% higher, respectively, than those of the coarse-grained 7075 Al alloy counterpart. The enhanced strength resulted from high densities of Guinier–Preston (G-P) zones and dislocations. This study shows that severe plastic deformation has the potential to significantly enhance the mechanical properties of precipitate hardening 7000 series Al alloys.

Evolution of mechanical properties in a 7075 Al-alloy subject to natural ageing

2013 ◽  
Vol 49 ◽  
pp. 160-167 ◽  
Author(s):  
Alan G. Leacock ◽  
Conrad Howe ◽  
Desmond Brown ◽  
Odd-Geir Lademo ◽  
Alan Deering
Keyword(s):  
Mechanical Properties ◽  
Al Alloy ◽  
Natural Ageing ◽  
7075 Al Alloy

Microstructural Evolution and Mechanical Properties of Ultrafine Grained Commercially Pure 1100 Aluminum Alloy Processed by Accumulative Roll-Bonding (ARB)

2004 ◽  
Vol 449-452 ◽  
pp. 625-628 ◽  
Author(s):  
Yong Suk Kim ◽  
T.O. Lee ◽  
Dong Hyuk Shin
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Microstructural Evolution ◽  
Sliding Wear ◽  
Al Alloy ◽  
Commercially Pure ◽  
Transmission Electron ◽  
Ultrafine Grained ◽  
Average Grain Size ◽  
Accumulated Strain

The ARB process has been carried out up to seven cycles on a commercial purity 1100 aluminum alloy to obtain ultra-fine grains with the average grain size of 500 nm. Microstructural evolution of the ARB processed aluminum alloy was examined by a transmission electron microscopy as a function of accumulated total strain. Mechanical properties including hardness, tensile property, and sliding wear characteristics of the severely deformed Al alloy were also investigated. Grain boundaries of the ARB processed alloy were diffusive and poorly defined after the initial ARB cycles, however they changed to well-defined high angle boundaries with the increase of the accumulated strain. Though hardness and strength of the ARB processed alloy were enhanced significantly, wear resistance of the processed alloy hardly increased. The mechanical properties were discussed in connection with the microstructure.

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