scholarly journals Влияние фазовых превращений на взаимодействие алюминиевых сплавов при скоростях более 9 km/s

2020 ◽  
Vol 46 (9) ◽  
pp. 25
Author(s):  
Б.В. Румянцев ◽  
И.В. Гук ◽  
А.И. Козачук ◽  
А.И. Михайлин ◽  
С.И. Павлов ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Space Debris ◽  
Alloy Target

The introduction of an aluminum jet with a speed of 8 - 11 km / s into an aluminum alloy target is being investigated. An analysis of the kinetics and parameters of penetration, the surface of the cavity after the introduction suggests that at speeds of more than 9 km / s the hydrodynamic nature of the penetration is violated due to the melting of interacting metals. The results of the study are intended to develop screen protection of spacecraft from the most dangerous fragments of space debris.

Investigation into Damage of Aluminum Multi-Wall Shield under Hypervelocity Projectiles Impact

2008 ◽  
Vol 385-387 ◽  
pp. 201-204
Author(s):  
Gong Shun Guan ◽  
Bao Jun Pang ◽  
Run Qiang Chi ◽  
Nai Gang Cui
Keyword(s):  
Aluminum Alloy ◽  
Space Debris ◽  
Hypervelocity Impact ◽  
Wall Structure ◽  
First Wall ◽  
Experiment Data ◽  
Normal Impact ◽  
Advanced Method ◽  
Hypervelocity Impacts ◽  
Gas Gun

In order to study the hypervelocity impact of space debris on spacecraft through hypervelocity impact on aluminum alloy multi-wall structure, a two-stage light gas gun was used to launch 2017-T4 aluminum alloy sphere projectiles. The projectile diameters ranged from 2.74mm to 6.35mm and impact velocities ranged from 1.91km/s to 5.58km/s. Firstly, the advanced method of multi-wall shield resisting hypervelocity impacts from space debris was investigated, and the effect of amount and thickness of wall on shield performance was discussed. Finally, by regression analyzing of experiment data, the experience equations for forecasting the diameter of the penetration hole on the first wall and the diameter of the damaged area on the second wall of aluminum multi-wall shield under hypervelocity normal impact of Al-spheres were obtained. The results indicated that the performance of multi-wall shield with more amount of wall is excellent when area density is constant. At the same time, intensity of the first wall and protecting space play the important roles.

scholarly journals Comparison of Aluminum Alloy and CFRP Bumpers for Space Debris Protection

2015 ◽  
Vol 103 ◽  
pp. 189-196 ◽  
Author(s):  
Masumi Higashide ◽  
Takumi Kusano ◽  
Yuu Takayanagi ◽  
Kazuyoshi Arai ◽  
Sunao Hasegawa
Keyword(s):  
Aluminum Alloy ◽  
Space Debris

Techniques for Transmission Electron Microscopy of Fiber-Matrix Interfaces in Aluminum Alloy-Boron Composites by Ion Erosio

1971 ◽  
Vol 29 ◽  
pp. 204-205
Author(s):  
G. G. Shaw
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Aluminum Alloy ◽  
Electron Beam ◽  
Pure Aluminum ◽  
Ion Milling ◽  
Transmission Electron ◽  
Fiber Matrix ◽  
Ion Erosion ◽  
Row Of Fibers

The morphology and composition of the fiber-matrix interface can best be studied by transmission electron microscopy and electron diffraction. For some composites satisfactory samples can be prepared by electropolishing. For others such as aluminum alloy-boron composites ion erosion is necessary.When one wishes to examine a specimen with the electron beam perpendicular to the fiber, preparation is as follows: A 1/8 in. disk is cut from the sample with a cylindrical tool by spark machining. Thin slices, 5 mils thick, containing one row of fibers, are then, spark-machined from the disk. After spark machining, the slice is carefully polished with diamond paste until the row of fibers is exposed on each side, as shown in Figure 1.In the case where examination is desired with the electron beam parallel to the fiber, preparation is as follows: Experimental composites are usually 50 mils or less in thickness so an auxiliary holder is necessary during ion milling and for easy transfer to the electron microscope. This holder is pure aluminum sheet, 3 mils thick.

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