Use of Emulsion Explosives in Experimental Studies of Flows in the Weld Zone in Explosive Welding

2018 ◽  
Keyword(s):  
Explosive Welding ◽  
Weld Zone ◽  
Experimental Studies ◽  
Emulsion Explosives

Use of Emulsion Explosives in Experimental Studies of Flows in the Bonding Zone in Explosive Welding

2018 ◽  
Vol 54 (2) ◽  
pp. 231-237 ◽  
Author(s):  
B. S. Zlobin ◽  
V. V. Kiselev ◽  
A. A. Shterzer ◽  
A. V. Plastinin
Keyword(s):  
Explosive Welding ◽  
Experimental Studies ◽  
Emulsion Explosives ◽  
Bonding Zone

scholarly journals Numerical and Experimental Studies on the Explosive Welding of Tungsten Foil to Copper

Materials ◽  
2017 ◽  
Vol 10 (9) ◽  
pp. 984 ◽  
Author(s):  
Qiang Zhou ◽  
Jianrui Feng ◽  
Pengwan Chen
Keyword(s):  
Explosive Welding ◽  
Experimental Studies ◽  
Tungsten Foil

scholarly journals Enhancement of Explosive Welding Possibilities by the Use of Emulsion Explosive/ Rozwój Mozliwości Łączenia Wybuchowego Przez Użycie Emulsji Wybuchowych

2014 ◽  
Vol 59 (4) ◽  
pp. 1587-1592 ◽  
Author(s):  
B. Zlobin ◽  
V. Sil’Vestrov ◽  
A. Shtertser ◽  
A. Plastinin ◽  
V. Kiselev
Keyword(s):  
Thin Layer ◽  
Physical Properties ◽  
Detonation Velocity ◽  
Explosive Welding ◽  
Hardened Steel ◽  
Explosion Welding ◽  
Thin Layers ◽  
Emulsion Explosive ◽  
Emulsion Explosives ◽  
Thermo Physical Properties

Abstract Explosive welding is an effective method of joining of various metals and alloys. However, when the materials with very different strength and thermo-physical properties are welded or thin-layer cladding is performed, the difficulties occur which call for extra investigations. In the present paper, with the couples of steel / carbide composite and copper / hardened steel used as examples, under study were the peculiarities of bonding formation by the explosive welding of metals with highly differing properties. The experiments were carried out with emulsion explosive containing hollow micro-spheres and detonating in thin layers with the low (2 - 3 km/s) detonation velocity. Obtained results show that the emulsion explosives enable to extend the explosion welding potentiality.

Numerical and experimental studies on the explosive welding of plates with different initial strength

2019 ◽  
Vol 63 (4) ◽  
pp. 967-974 ◽  
Author(s):  
Xiang-yu Zeng ◽  
Xiao-jie Li ◽  
Xiang Chen ◽  
Xiao-hong Wang ◽  
Hong-hao Yan
Keyword(s):  
Explosive Welding ◽  
Experimental Studies ◽  
Initial Strength

scholarly journals Investigation of Copper-Aluminium Composite Materials Produced by Explosive Welding

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 780 ◽  
Author(s):  
Yakup Kaya
Keyword(s):  
Explosive Welding ◽  
Cold Deformation ◽  
Experimental Studies ◽  
Bonding Interface ◽  
Aluminium Composite ◽  
Bending Tests ◽  
Welding Method ◽  
Wavy Structure ◽  
Deformation Hardening ◽  
Hardness Values

Aluminium and copper are two metals frequently used in the automotive and aerospace industries due to their properties of lightness and high conductivity. In this study, copper and aluminium plates were joined using the explosive welding method. The effects of the explosive ratio on the properties of the bonding interface were investigated. Results of the experimental studies showed that the bonding interface changed from a slightly wavy structure to a completely wavy structure as the explosive ratio was increased. It was found that due to the cold deformation resulting from the collision of the flyer and parent plates during the explosion, there was an increase in the hardness values near the bonding interface and on the outer surfaces of the plates. The increase in deformation hardening along with the increasing explosive ratios led to the reduced impact toughness of the composites. In the results of the tensile-shear and bending tests, no separation or fracturing was seen in the bonding interfaces at any of the explosive ratios. As a result, it was seen that the explosive welding method can be used in combining copper and aluminium materials.

scholarly journals EXPERIMENTAL STUDIES ON PROCESSING OF POLYBUTADIENE-BASED SOLID PROPELLANT TO EXTRACT AMMONIUM PERCHLORATE

2020 ◽  
Vol 142 (1) ◽  
pp. 112-120
Author(s):  
M. M. Cheltonov ◽  
O. L. Kyrychenko
Keyword(s):  
Ammonium Perchlorate ◽  
Polymer Matrix ◽  
Solid Propellant ◽  
Room Temperature ◽  
Experimental Studies ◽  
Extraction Process ◽  
Emulsion Explosives ◽  
Constant Weight ◽  
Leaching Process ◽  
Technical And Economic Analysis

The purpose of this work is to establish regularities of the leaching process and to determine parameters for leaching ammonium perchlorate from polymer crumb as solid propellant disposal products. The process of leaching ammonium perchlorate from the polymer matrix was carried out in a flask equipped with an agitator in a polymer matrix: water ratio of 1: 2, with such changing parameters as: temperature (20-80 °С), time of extraction process (1-4 h). Then, the obtained refined polymer matrix was filtered off, dried at room temperature, and weighed. The content of the chemical composition of the polymer matrix was determined in refined polymer matrix. The obtained polymer matrix was dried at temperatures of 70 ºС, 90 ºС, 100 ºС to constant weight, with intermittent weighing of dried samples. It was determined that the degree of leaching of ammonium perchlorate from polymer matrix when the leaching time is 2-4 hours is maximum, both during the process at a temperature of 20 °C and at a temperature of 60 °C and 80 °C, respectively. It was found that the maximum degree of ammonium perchlorate leaching from polymer matrix was 82.3% in the experiment with the following modes - the process temperature was 80 °C, the speed of the mechanical stirrer was 400 rpm, and the leaching process took 4 hours. It was found that the most preferable temperature range for the drying of refined polymer matrix is 90 to 100 °С. It was determined that the refined polymer matrix is a substance which is not particularly dangerous for transportation and can be recommended for use as a filler in compositions of emulsion explosives, or for extraction of nitramine. Establishing the regularities of ammonium perchlorate extraction from polybutadiene-based solid propellant, obtained from expired loaded motor cases. The data obtained after a detailed technical and economic analysis can be considered as the basis for the creation of a pilot industrial facility for the extraction of a water-insoluble component of solid propellant, i.e. ammonium perchlorate.

Thermal effects in the weld zone in explosive welding

1971 ◽  
Vol 7 (3) ◽  
pp. 373-375 ◽  
Author(s):  
I. D. Zakharenko ◽  
T. M. Sobolenko
Keyword(s):  
Thermal Effects ◽  
Explosive Welding ◽  
Weld Zone

Microstructure and mechanical properties of laser welded titanium alloy and stainless steel joint with composite interlayer

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Yan Zhang ◽  
YiDi Gao ◽  
JianPing Zhou ◽  
DaQian Sun ◽  
HongMei Li
Keyword(s):  
Stainless Steel ◽  
Explosive Welding ◽  
Weld Zone ◽  
Fusion Welding ◽  
304 Stainless Steel ◽  
Ti Alloy ◽  
Commercially Pure ◽  
Welding Interface ◽  
Steel Composite ◽  
Fe Intermetallics

Abstract In this work, TA2/T2 was used as a composite interlayer to prevent the formation of brittle Ti-Fe intermetallics when joining TC4 Ti alloy to 304 stainless steel. The TA2/T2 (commercially pure Ti and Cu) composite interlayer was prepared by explosive welding. The laser was focused on the TC4-TA2 interface, which joined the TC4 and TA2 by fusion welding. At the TC4-TA2 interface, a weld zone was formed due to the mixing of molten TC4 and TA2. The laser was also focused on the T2-304 stainless steel interface, a weld zone was formed due to the mixing of molten T2 and 304 stainless steel. Composite interlayer TA/T2 was used not only to prevent the formation of Ti-Fe intermetallics during welding but also to improve microstructure and properties of the stainless steel–Ti alloy joint. The joint fractured at the TA2/T2 explosive welding interface with a maximum tensile strength of 428 MPa.

3-D reconstruction and analysis of mammalian mitotic spindle structure

1992 ◽  
Vol 50 (1) ◽  
pp. 578-579
Author(s):  
Kent McDonald ◽  
David Mastronarde ◽  
Rubai Ding ◽  
Eileen O'Toole ◽  
J. Richard McIntosh
Keyword(s):  
Cross Sections ◽  
Mitotic Spindle ◽  
Experimental Studies ◽  
Video Camera ◽  
Three Dimensions ◽  
Mitotic Spindles ◽  
Black And White ◽  
Reconstruction Methods ◽  
Spindle Structure ◽  
Tissue Culture Line

Mammalian spindles are generally large and may contain over a thousand microtubules (MTs). For this reason they are difficult to reconstruct in three dimensions and many researchers have chosen to study the smaller and simpler spindles of lower eukaryotes. Nevertheless, the mammalian spindle is used for many experimental studies and it would be useful to know its detailed structure.We have been using serial cross sections and computer reconstruction methods to analyze MT distributions in mitotic spindles of PtK cells, a mammalian tissue culture line. Images from EM negatives are digtized on a light box by a Dage MTI video camera containing a black and white Saticon tube. The signal is digitized by a Parallax 1280 graphics device in a MicroVax III computer. Microtubules are digitized at a magnification such that each is 10-12 pixels in diameter.

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