Effect of Grain Refinement on the Mechanical Behaviour of an Al6061 Alloy at Cryogenic Temperatures

2011 ◽  
Author(s):  
E. Moreno-Valle ◽  
M. T. Perez-Prado ◽  
M. Yu. Murashkin ◽  
R. Z. Valiev ◽  
E. V. Bobruk ◽  
...  
Keyword(s):  
Grain Refinement ◽  
Mechanical Behaviour ◽  
Cryogenic Temperatures ◽  
Al6061 Alloy

Mechanical Properties and Microstructures of 5052 Al Alloy Processed by Asymmetric Cryorolling

2016 ◽  
Vol 850 ◽  
pp. 823-828 ◽  
Author(s):  
Jin Tao Shi ◽  
Long Gang Hou ◽  
Cun Qiang Ma ◽  
Jin Rong Zuo ◽  
Hua Cui ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Grain Refinement ◽  
Cryogenic Temperature ◽  
Room Temperature ◽  
Velocity Ratio ◽  
Experimental Results ◽  
Al Alloy ◽  
Cryogenic Temperatures

Aluminum alloy sheets were asymmetrically rolled at room and cryogenic temperatures by imposing different velocity ratios of 1~1.5 between the upper and bottom rolls. After rolling, the stress-strain curves, microhardness as well as the microstructures of the rolled samples were characterized and analyzed. The experimental results showed that the asymmetric cryorolling could improve the grain refinement and offered (~12%) higher room temperature tensile strength than that processed by symmetrical rolling with velocity ration of 1.0 (~280 MPa). However, at cryogenic temperature, the strength of asymmetrically cryorolling sheet (with velocity ratio of 1.5) was 5.1%, which is less than that processed by symmetrical rolling.

Effect of Grain Refinement on the Mechanical Behaviour of Ferritic Steels: Evolution of Isotropic Hardening and Kinematic Hardening

2008 ◽  
Vol 584-586 ◽  
pp. 605-609 ◽  
Author(s):  
Olivier Bouaziz ◽  
A. Aouafi ◽  
Sebastien Allain
Keyword(s):  
Experimental Data ◽  
Grain Size ◽  
Grain Refinement ◽  
Mechanical Behaviour ◽  
Kinematic Hardening ◽  
Metallic Alloys ◽  
Isotropic Hardening ◽  
Ferritic Steels ◽  
Size Refinement ◽  
Fine Grain

New experimental data related to the grain size and the Bauschinger effects have been obtained for ferritic steels with grain size in the range of 3.5-22m. As the data show an increasing contribution of the kinematic hardening with grain size refinement, a new physical based model describing the isotropic hardening and the kinematic hardening is presented and validated with regard to the grain size. The consequences are discussed for fine grain metallic alloys.

scholarly journals Investigations on Mechanical Behaviour of Micro B4C Particles Reinforced Al6061 Alloy Metal Composites

2021 ◽  
Vol 14 (22) ◽  
pp. 1855-1863
Author(s):  
H S Vasanth Kumar ◽  
◽  
U N Kempaiah ◽  
Madeva Nagaral ◽  
K Revanna
Keyword(s):  
Mechanical Behaviour ◽  
Metal Composites ◽  
B4c Particles ◽  
Al6061 Alloy ◽  
Alloy Metal

Effect of Grain Size on Cryogenic Mechanical Properties of an Al-Mg-Sc Alloy

2014 ◽  
Vol 922 ◽  
pp. 862-867 ◽  
Author(s):  
Daria Zhemchuzhnikova ◽  
Rustam Kaibyshev
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Grain Size ◽  
Grain Refinement ◽  
Cryogenic Temperatures ◽  
Angular Pressing ◽  
Average Grain Size ◽  
Positive Effect ◽  
Brittle Intergranular Fracture ◽  
Refinement Effect

An aluminum alloy with a chemical composition of Al–6%Mg–0.35%Mn–0.2%Sc–0.08%Zr–0.07%Cr (in wt.) and an initial grain size of ∼22 μm was subjected to equal-channel angular pressing (ECAP) at 593 K up to a total strain of ~12. Extensive grain refinement provided the formation of fully recrystallized structure with an average grain size of ∼0.6 μm. The mechanical properties of the alloy in two different structural conditions were examined at temperatures ranging from 77 to 293 K. It was shown that ECAP highly enhanced the strength, ductility and fracture toughness of the material over the wide temperature interval. Positive effect of grain refinement tends to increase with decreasing temperature due to suppression of brittle intergranular fracture. At ambient temperature, the extensive grain refinement provides +65% increase in yield stress (YS) and ductility, concurrently. At 77 K, YS increase is + 77%, and the ductility increase is +113% owing to grain refinement. Effect of the grain size on fracture toughness at cryogenic temperatures is discussed.

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