scholarly journals USING DYNAMIC PRE-ACTIVATION OF STEEL SURFACES FOR NITRIDING INTENSIFICATION

2017 ◽  
Vol 3 ◽  
pp. 321
Author(s):  
Yulia Usherenko ◽  
Sergei Usherenko ◽  
Vladimir Dashkevich ◽  
Javad Yazdani
Keyword(s):  
High Speed ◽  
Dynamic Method ◽  
Low Carbon Steel ◽  
Deep Penetration ◽  
Low Carbon ◽  
Complex Dynamic ◽  
High Speed Flow ◽  
Speed Flow ◽  
Powder Particles ◽  
Steel Surfaces

The article considers the possibility of pre-activation of the steel surface before nitriding. A complex dynamic method of material activation with a high-speed flow of powder particles (super deep penetration) was used. To exclude the influence of alloying elements, low-carbon steel (2% wt. C) was chosen as the initial material. Powders of NaF (> 250 μm) and Pb (

scholarly journals IMPACT OF THE HIGH-SPEED FLOW OF POWDER PARTICLES ON THE STRUCTURE OF POLYMER MATERIALS AND METAL-POLYMER COMPOSITES

2021 ◽  
Vol 3 ◽  
pp. 363-367
Author(s):  
Yulia Usherenko ◽  
Viktors Mironovs ◽  
Leonids Pakrastiņš
Keyword(s):  
High Speed ◽  
High Energy ◽  
Polymer Materials ◽  
Deep Penetration ◽  
Self Healing ◽  
High Speed Flow ◽  
Speed Flow ◽  
Polymer Metal ◽  
Powder Particles ◽  
High Speed Flows

The problem of protecting spacecraft from cosmic dust has recently come to the fore. There is still no enough data on the complex effect of short-term high-energy, dynamic loading on materials, including polymer materials and multilayer polymer-metal composites. The use of dynamic alloying in the super-deep penetration (SDP) mode by high-speed flows of powder particles allows assessing the effect on the material under dynamic action. Previous studies on steel and aluminum samples have shown a significant effect of high-speed flows of powder particles on the structure and properties of materials. As a result of a study of samples made of aliphatic polyurethane with steel reinforcement elements, it was found that there are traces of the penetration of high-speed particles into both metal and polymer layers. However, the number of flow elements detected in the polymeric part is significantly less than the number of elements in the metal reinforcing part. Thus, it is possible to assume that or the polymer material is a more effective barrier to the high-speed flow compared to the metal, or the “self-healing” effect is observed. 

Visualization of High Speed Flow in a Pipe with Cavity

1997 ◽  
Vol 17 (Supplement2) ◽  
pp. 113-116
Author(s):  
Kenji HOSOI ◽  
Masaaki KAWAHASHI ◽  
Hiroyuki HIRAHARA ◽  
Kouju SHIOZAKI ◽  
Kenichirou SATOH
Keyword(s):  
High Speed ◽  
High Speed Flow ◽  
Speed Flow

Pulsed discharge-induced high-speed flow near a dielectric ledge

2021 ◽  
Vol 62 (7) ◽  
Author(s):  
D. I. Tatarenkova ◽  
E. Yu. Koroteeva ◽  
T. A. Kuli-zade ◽  
E. A. Karnozova ◽  
I. A. Znamenskaya ◽  
...  
Keyword(s):  
High Speed ◽  
Pulsed Discharge ◽  
High Speed Flow ◽  
Speed Flow

The Structure and Propagation Mechanism of Turbulent Flames in High Speed Flow

1955 ◽  
Vol 25 (8) ◽  
pp. 377-384 ◽  
Author(s):  
MARTIN SUMMERFIELD ◽  
SYDNEY H. REITER ◽  
VICTOR KEBELY ◽  
RICHARD W. MASCOLO
Keyword(s):  
High Speed ◽  
Turbulent Flames ◽  
Propagation Mechanism ◽  
High Speed Flow ◽  
Speed Flow
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