Correlation Between X-Ray Diffraction Pattern and Microstructure of Laser Shock Processed 7050-T7451 Aluminum Alloy Surface

2018 ◽  
Vol 45 (5) ◽  
pp. 0502003
Author(s):  
曹宇鹏 Cao Yupeng ◽  
陈浩天 Chen Haotian ◽  
冯爱新 Feng Aixin ◽  
周锐 Zhou Rui ◽  
花国然 Hua Guoran ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Diffraction Pattern ◽  
Alloy Surface ◽  
Laser Shock ◽  
X Ray Diffraction ◽  
X Ray ◽  
Aluminum Alloy Surface

WC Nano-Particle Implanting Strengthening on Aluminum Alloy Surface Via Laser Shock Peening

2011 ◽  
Vol 38 (12) ◽  
pp. 1203006
Author(s):  
吕亮 Lü Liang ◽  
黄婷 Huang Ting ◽  
钟敏霖 Zhong Minlin
Keyword(s):  
Aluminum Alloy ◽  
Laser Shock Peening ◽  
Alloy Surface ◽  
Nano Particle ◽  
Laser Shock ◽  
Shock Peening ◽  
Aluminum Alloy Surface

Insulation Treatment of 2A12 Aluminum Alloy Surface by Plasma Electrochemical Oxidation

2011 ◽  
Vol 687 ◽  
pp. 297-302
Author(s):  
Ming Liu ◽  
Zhi Hua Sun ◽  
Zhi Shen Wang ◽  
Xiao Yun Zhang ◽  
Feng Lu
Keyword(s):  
Aluminum Alloy ◽  
Field Strength ◽  
Electrochemical Oxidation ◽  
Alloy Surface ◽  
Breakdown Field ◽  
Electric Resistance ◽  
X Ray Diffraction ◽  
Peo Coatings ◽  
Aluminum Alloy Surface ◽  
Breakdown Field Strength

The 2A12 aluminum alloy surface is treated by plasma electrochemical oxidation (PEO) in alkaline solution. X-ray Diffraction (XRD) is used to analyze the phases of PEO coatings. Scanning Electron Micrograph (SEM) is used to investigate the compactness of PEO coatings. High resistance meter and voltage resistance meter are used to measured Electric resistance and breakdown field strength of PEO coatings respectively. The results show that the PEO coating is composed of α-Al2O3, γ-Al2O3 , etc, and they are all well-insulated substance which is profitable to insulation of 2A12 aluminum alloy. When the thickness of PEO is more than 60μm, porosity in the PEO coating is estimated not more than 15%. Electric resistivity of PEO coatings can reach as high as 1013 Ω·cm, and breakdown field strength of the PEO coatings can reach 72 V / μm.

scholarly journals Characterization at a local scale of a laser-shock peened aluminum alloy surface

2011 ◽  
Vol 257 (16) ◽  
pp. 7195-7203 ◽  
Author(s):  
B. Rouleau ◽  
P. Peyre ◽  
J. Breuils ◽  
H. Pelletier ◽  
T. Baudin ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Local Scale ◽  
Alloy Surface ◽  
Laser Shock ◽  
Aluminum Alloy Surface

Electron Microscopy of Shock Loaded Polycrystalline Beryllium

1974 ◽  
Vol 32 ◽  
pp. 506-507 ◽  
Author(s):  
J. M. Galbraith ◽  
L. E. Murr ◽  
A. L. Stevens
Keyword(s):  
Electron Microscopy ◽  
Wave Propagation ◽  
Structural Change ◽  
Single Crystal ◽  
Diffraction Pattern ◽  
Shock Loading ◽  
Slip Systems ◽  
Compression Tests ◽  
X Ray Diffraction ◽  
X Ray

Uniaxial compression tests and hydrostatic tests at pressures up to 27 kbars have been performed to determine operating slip systems in single crystal and polycrystal1ine beryllium. A recent study has been made of wave propagation in single crystal beryllium by shock loading to selectively activate various slip systems, and this has been followed by a study of wave propagation and spallation in textured, polycrystal1ine beryllium. An alteration in the X-ray diffraction pattern has been noted after shock loading, but this alteration has not yet been correlated with any structural change occurring during shock loading of polycrystal1ine beryllium.This study is being conducted in an effort to characterize the effects of shock loading on textured, polycrystal1ine beryllium. Samples were fabricated from a billet of Kawecki-Berylco hot pressed HP-10 beryllium.

Cytomembrane Preservation in Tissue Dehydrated Only With Glutaraldehyde and Epon 812 Resin

1973 ◽  
Vol 31 ◽  
pp. 320-321
Author(s):  
Daniel C. Pease
Keyword(s):  
Diffraction Pattern ◽  
X Ray Diffraction ◽  
High Concentration ◽  
Unpublished Study ◽  
X Ray ◽  
Sectioned Material

A previous study demonstrated that tissue could be successfully infiltrated with 50% glutaraldehyde, and then subsequently polymerized with urea to create an embedment which retained cytomembrane lipids in sectioned material. As a result, the 180-190 Å periodicity characteristic of fresh, mammalian myelin was preserved in sections, as was a brilliant birefringence, and the capacity to bind OsO4 vapor in the hydrophobic bilayers. An associated (unpublished) study, carried out in co-operation with Drs. C.K. Akers and D.F. Parsons, demonstrated that the high concentration of glutaraldehyde (and urea) did not significantly alter the X-ray diffraction pattern of aldehyde-fixed, myelin. Thus, by itself, 50% glutaraldehyde has little effect upon cytomembrane systems and can be used with confidence for the first stages of dehydration.

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