scholarly journals MODELING THE HARDNESS AND POROSITY OF BRAKE PAD MATERIALS

2021 ◽  
Vol 05 (01) ◽  
pp. 28-34
Author(s):  
Fikret Yusubov
Keyword(s):  
Powder Metallurgy ◽  
Analysis Of Variance ◽  
Process Parameters ◽  
Design Model ◽  
Brake Pad ◽  
Taguchi’S Technique ◽  
Level Design ◽  
Powder Metallurgy Methods ◽  
Friction Brake

In this study, experiment were conducted to determine influental process parameters to the hardness and porosity properties of newly developed brake pad composites. Brake pad composites were preperad by traditional powder metallurgy methods. The development of friction brake pad specimens used in this work were based on a non-asbestos organic type formulation. The plan of experiments conducted to by 2-level design model using 5 factor on base L8 array. Results of analysis of variance showed that “plasticizer” was most important factor to influence both properties. Keywords: friction composites, hardness, porosity, powder metallurgy, Taguchi’s technique

scholarly journals Highly porous, hierarchically structured nickel nanomaterials consolidated by powder metallurgy methods

2021 ◽  
Vol 1942 (1) ◽  
pp. 012019
Author(s):  
A G Gnedovets ◽  
V A Zelensky ◽  
A B Ankudinov ◽  
V S Shustov ◽  
M I Alymov
Keyword(s):  
Powder Metallurgy ◽  
Powder Metallurgy Methods ◽  
Highly Porous

scholarly journals Effect of Process Parameters on the Surface Roughness and Kerf Width of Mild Steel during Plasma Arc Cutting Using Response Surface Methodology

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Ekhaesomi A Agbonoga ◽  
Oyewole Adedipe ◽  
Uzoma G Okoro ◽  
Fidelis J Usman ◽  
Kafayat T Obanimomo ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Analysis Of Variance ◽  
Process Parameters ◽  
Cutting Speed ◽  
Gas Pressure ◽  
Kerf Width ◽  
Plasma Arc ◽  
Plasma Arc Cutting

This study investigated the effects of process parameters of plasma arc cutting (PAC) of low carbon steel material using analysis of variance. Three process parameters, cutting speed, cutting current and gas pressure were considered and experiments were conducted based on response surface methodology (RSM) via the box-Behnken approach. Process responses viz. surface roughness (Ra) and kerf width of cut surface were measured for each experimental run. Analysis of Variance (ANOVA) was performed to get the contribution of process parameters on responses. Cutting current has the most significant effect of 33.43% on the surface roughness and gas pressure has the most significant effect on  kerf width of  41.99% . For minimum surface roughness and minimum kerf width, process parameters were optimized using the RSM. Keywords: Cutting speed, cutting current, gas pressure,   surface roughness, kerf width

scholarly journals Hierarchically structured, highly porous nickel synthesized in sintering–evaporation process from a metal nanopowder and a space holder

2019 ◽  
Vol 484 (4) ◽  
pp. 436-440
Author(s):  
A. G. Gnedovets ◽  
V. A. Zelenskii ◽  
A. B. Ankudinov ◽  
M. I. Alymov
Keyword(s):  
Powder Metallurgy ◽  
Porous Material ◽  
Ammonium Bicarbonate ◽  
Evaporation Process ◽  
Porous Nickel ◽  
Space Holder ◽  
Nickel Nanopowder ◽  
Powder Metallurgy Methods ◽  
Highly Porous ◽  
Highly Porous Material

This paper reports on the creation of a highly porous material with a hierarchical structure using powder metallurgy methods based on nickel nanopowder and ammonium bicarbonate NH4HCO3 as a space holder.

TECHNOLOGICAL WAYS TO CREATE COMPOSITE MATERIALS BASED ON HEAT-RESISTANT REFRACTORY COMPOUNDS (review)

2021 ◽  
pp. 12-20
Author(s):  
A.V. Shestakov ◽  
◽  
M.M. Karashaev ◽  
N.S. Dmitriev ◽  
◽  
...  
Keyword(s):  
Composite Materials ◽  
Powder Metallurgy ◽  
Thermomechanical Processing ◽  
Technological Plasticity ◽  
Heat Resistant ◽  
System A ◽  
Refractory Compounds ◽  
Similar Materials ◽  
Powder Metallurgy Methods ◽  
Rocket Technology

The article discusses the main technological approaches to obtain heat-resistant and heat-resistant materials based on compounds in the Ni–Al system in order to use them in promising products of aviation and rocket technology. It is shown that when receiving materials based on compounds in the Ni-Al system, a phase of eutectic origin is formed based on the Ni3Al compound, which reduces the technological plasticity of the alloys of this system. The use of powder metallurgy methods eliminates such phases in the structure of alloys obtained using granule metallurgy technology, as well as with the use of special methods of powder metallurgy. Technological approaches are presented to obtain similar materials using powder metallurgy methods combined with thermomechanical processing.

The method of calculation of the deviation of the tool axis when machining small diameter holes

2020 ◽  
pp. 24-30
Author(s):  
A.V. Zaytsev ◽  
N. A. Kolupaev
Keyword(s):  
Powder Metallurgy ◽  
Negative Impact ◽  
Small Diameter ◽  
Hole Depth ◽  
Method Of Calculation ◽  
Tool Axis ◽  
Hole Axis ◽  
Hole Machining ◽  
Powder Metallurgy Methods ◽  
Cutting Modes

The article is devoted to an important parameter that characterizes the accuracy of the shape and location of the hole after machining — the displacement of the hole axis. When designing operations for drilling small-diameter holes with a large depth (the ratio of the hole depth to its diameter is more than 10), a method for predicting this parameter is necessary to improve the accuracy of work. The article considers the causes and methods of eliminating this negative impact on hole machining using the example of a small-diameter drill axis runout. Recommendations are given for reducing drill runout: to reduce cutting modes; to perform the drilling operation while rotating the workpiece, which can stabilize the drill position during machining; to use drills made of hard alloy or obtained by powder metallurgy methods, which increases their rigidity; before drilling the workpiece, to center the hole with a more rigid drill.

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