Effect of grain size on thermal residual stresses and damage in sintered chromium–alumina composites: Measurement and modeling

2014 ◽  
Vol 67 ◽  
pp. 119-124 ◽  
Author(s):  
W. Węglewski ◽  
M. Basista ◽  
A. Manescu ◽  
M. Chmielewski ◽  
K. Pietrzak ◽  
...  
Keyword(s):  
Grain Size ◽  
Residual Stresses ◽  
Thermal Residual Stresses ◽  
Alumina Composites ◽  
Sintered Chromium

scholarly journals A Comparative Study of Mechanical Properties, Thermal Conductivity, Residual Stresses, and Wear Resistance of Aluminum-Alumina Composites Obtained by Squeeze Casting and Powder Metallurgy

2021 ◽  
Author(s):  
Justyna Maj ◽  
Witold Węglewski ◽  
Kamil Bochenek ◽  
Łukasz Rogal ◽  
Stefania Woźniacka ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Powder Metallurgy ◽  
Residual Stresses ◽  
Squeeze Casting ◽  
Processing Route ◽  
Thermal Residual Stresses ◽  
Frictional Wear ◽  
Potential Applications ◽  
Alumina Composites ◽  
The Impact

AbstractSqueeze casting and powder metallurgy techniques were employed to fabricate AlSi12/Al2O3 composites, which are lightweight structural materials with potential applications in the automotive industry. The impact of the processing route on the material properties was studied. Comparative analyses were conducted for the Vickers hardness, flexural strength, fracture toughness, thermal conductivity, thermal residual stresses, and frictional wear. Our results show that the squeeze cast composite exhibits superior properties to those obtained using powder metallurgy.

Influence of residual stresses and grain size on the spinodal decomposition of metastable Ti1−xAlxN coatings

2012 ◽  
Vol 209 ◽  
pp. 190-196 ◽  
Author(s):  
N. Schalk ◽  
C. Mitterer ◽  
J. Keckes ◽  
M. Penoy ◽  
C. Michotte
Keyword(s):  
Grain Size ◽  
Residual Stresses ◽  
Spinodal Decomposition

scholarly journals Formation of Residual Stresses during Discontinuous Friction Treatment

2021 ◽  
Vol 8 (1) ◽  
pp. C38-C44
Author(s):  
I. Hurey ◽  
V. Gurey ◽  
M. Bartoszuk ◽  
T. Hurey
Keyword(s):  
Grain Size ◽  
Residual Stresses ◽  
Mineral Oil ◽  
Surface Shape ◽  
Technological Medium ◽  
Flat Surfaces ◽  
Compressive Stresses ◽  
Friction Treatment ◽  
Working Surface ◽  
Pass Through

The tool with grooves on its working surface is used to improve the properties of the strengthened layer. This allows us to reduce the structure’s grain size and increase the thickness of the layer and its hardness. Mineral oil and mineral oil with active additives containing polymers are used as a technological medium during friction treatment. It is shown that the technological medium used during the friction treatment affects the nature of the residual stresses’ distribution. Thus, when using mineral oil with active additives containing polymers, residual compressive stresses are more significant in magnitude and depth than when treating mineral oil. The nature of the residual stresses diagram depends on the treated surface’ shape. After friction treatment of cylindrical surfaces, the highest compressive stresses near the treated surface decreases with depth. And after friction treatment of flat surfaces near the treated surface, the compressive stresses are small. They increase with depth, pass through the maximum, and then decrease to the original values. The technological medium used during friction treatment affects residual stresses in the grains and in the crystal lattice.

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