Macro- and Microreactions in Mechanical-Impact Tests of Aluminum Alloys

2009 ◽  
pp. 240-240-20 ◽  
Author(s):  
RP Reed ◽  
CN McCowan ◽  
JD McColskey ◽  
NJ Simon
Keyword(s):  
Aluminum Alloys ◽  
Mechanical Impact ◽  
Impact Tests

Tensile Properties of 7075 Aluminum Alloys Subjected to Pre-Fatigue in Humid Environment

2014 ◽  
Vol 794-796 ◽  
pp. 538-543 ◽  
Author(s):  
Hiroyuki Yamada ◽  
Masaki Tsurudome ◽  
Nagahisa Ogasawara ◽  
Keitaro Horikawa
Keyword(s):  
Aluminum Alloys ◽  
Tensile Properties ◽  
High Humidity ◽  
Fatigue Specimen ◽  
Impact Tests ◽  
Humid Environment ◽  
Fatigue Deformation ◽  
High Humidity Environment ◽  
The Impact ◽  
Humidity Environment

The tensile properties of the quasi-static and the impact tests for 7075 aluminum alloys subjected to pre-fatigue deformation in a humid environment were investigated. An impact tensile test of the pre-fatigue deformed specimens was performed by means of the Split Hopkinson pressure bar method. Within the authors set of experiments, the flow stress in both the quasi-static and the impact tests was unaffected by the pre-fatigue deformation. On the other hand, it was shown that the ductility of the pre-fatigue specimen was slightly lower than that of the non-fatigue specimen. Additionally, the pre-fatigue specimen in a high-humidity environment had a lower ductility than in a low-humidity environment. The ductility of the quasi-static test was decreased as compared with the impact test. It is thought that the ductility loss occurred due to changes in the microstructure, such as dislocations caused by the presence of hydrogen in the specimen due to pre-fatigue deformation in a high-humidity environment.

scholarly journals Influence of Stress State on the Mechanical Impact and Deformation Behaviors of Aluminum Alloys

Metals ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 520 ◽  
Author(s):  
Marcos Rodriguez-Millan ◽  
Daniel Garcia-Gonzalez ◽  
Alexis Rusinek ◽  
Angel Arias
Keyword(s):  
Stress State ◽  
Aluminum Alloys ◽  
Mechanical Impact ◽  
Deformation Behaviors

Deformation and Fracture of Al-Li Alloys in Mechanical-Impact Tests

Materials ◽  
1992 ◽  
pp. 19-28
Author(s):  
R. P. Reed ◽  
C. N. McCowan ◽  
N. J. Simon ◽  
J. D. McColskey
Keyword(s):  
Mechanical Impact ◽  
Impact Tests ◽  
Deformation And Fracture

Mechanical impact tests of some selected polymers in high pressure liquid oxygen environments

2004 ◽  
Vol 28 (1) ◽  
pp. 55-59
Author(s):  
Fu-Yu Hshieh ◽  
David B. Hirsch ◽  
Harold D. Beeson
Keyword(s):  
High Pressure ◽  
Liquid Oxygen ◽  
Mechanical Impact ◽  
Impact Tests

Analytical Electron Microscopy Study of Second-Phase Particles in 7075 and 7475 Aluminum Alloys

1985 ◽  
Vol 43 ◽  
pp. 348-349
Author(s):  
M. Raghavan ◽  
J. Y. Koo ◽  
J. W. Steeds ◽  
B. K. Park
Keyword(s):  
Aluminum Alloys ◽  
Silicon Oxide ◽  
Analytical Electron Microscopy ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Partial Substitution ◽  
Second Phase ◽  
X Ray ◽  
Second Phase Particles ◽  
Almost All

X-ray microanalysis and Convergent Beam Electron Diffraction (CBD) studies were conducted to characterize the second phase particles in two commercial aluminum alloys -- 7075 and 7475. The second phase particles studied were large (approximately 2-5μm) constituent phases and relatively fine ( ∼ 0.05-1μn) dispersoid particles, Figures 1A and B. Based on the crystal structure and chemical composition analyses, the constituent phases found in these alloys were identified to be Al7Cu2Fe, (Al,Cu)6(Fe,Cu), α-Al12Fe3Si, Mg2Si, amorphous silicon oxide and the modified 6Fe compounds, in decreasing order of abundance. The results of quantitative X-ray microanalysis of all the constituent phases are listed in Table I. The data show that, in almost all the phases, partial substitution of alloying elements occurred resulting in small deviations from the published stoichiometric compositions of the binary and ternary compounds.

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