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.

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 The influence of electrocorundum granulation on the properties of sintered Cu/electrocorundum composites

2015 ◽  
Vol 47 (3) ◽  
pp. 249-258 ◽  
Author(s):  
A. Strojny-Nędza ◽  
K. Pietrzak ◽  
W. Węglewski
Keyword(s):  
Thermal Conductivity ◽  
Aerospace Industry ◽  
Particle Sizes ◽  
Aircraft Engines ◽  
Sintering Process ◽  
Good Resistance ◽  
Frictional Wear ◽  
High Specific Heat ◽  
Alumina Composites ◽  
Ceramic Reinforcement

Copper/alumina composites are extensively used in automotive and aerospace industry for products that are subjected to severe thermal and mechanical loadings, such as rocket thrusters and components of aircraft engines. These materials are well-known for their good frictional wear resistance, good resistance to thermal fatigue, high thermal conductivity and high specific heat. In this paper, the sintering process of copper/electrocorundum composites reinforced by electrocorundum particles with diameters of 3 or 180 ?m and 1, 3, 5 vol.% content is presented. The effects of different particle sizes of the ceramic reinforcement on the microstructure, physical, mechanical, tribological and thermal properties of the fabricated composites are discussed.

scholarly journals The Effect of Stacking Sequence and Temperature on the Mechanical and Low Velocity Impact Response of Glass/Epoxy Laminates

2010 ◽  
Vol 19 (4) ◽  
pp. 096369351001900
Author(s):  
Semih Benli ◽  
Onur Sayman ◽  
Yusuf Arman
Keyword(s):  
Mechanical Properties ◽  
Residual Stresses ◽  
Composite Laminates ◽  
Epoxy Composite ◽  
Low Velocity Impact ◽  
Stacking Sequence ◽  
Low Velocity ◽  
Velocity Impact ◽  
Thermal Residual Stresses ◽  
The Impact

This paper demonstrates both low velocity impact and mechanical test results of glass/epoxy composites at room and high temperatures. Square specimens of glass/epoxy composite laminates with lay-ups [0/0/90]s, [90/0/0]s, [0/90/45]s were subjected to low velocity impact energy range of 4 J to 22 J using an impact test machine at temperatures of 20°C, 50°C and 90°C. Load-deflection and energy profile diagrams were plotted for each stacking sequence and temperature. After impact, a high-intensity light was used to measure the projected delamination areas in the impacted glass/epoxy composite laminates. In order to investigate effects of temperature on mechanical properties and impact resistance, mechanical tests were also performed using unidirectional glass/epoxy composite plates composed of eight plies produced according to ASTM Standards. In addition, to understand the contribution of thermal residual stresses occurring during and after manufacturing of composite laminates on impact-induced delamination, SX and SY stresses in the composite laminates at 20, 50 and 90°C were determined by using ANSYS software. It can be concluded from this study that temperature has significant effects on the impact behaviour and mechanical properties of glass fibre-reinforced epoxy composite laminates. Besides, an increase in temperature decreases both the delamination area and the contribution of thermal residual stresses on delamination under the same impact loading.

Effect of microstructure on mechanical properties and residual stresses in interpenetrating aluminum-alumina composites fabricated by squeeze casting

2018 ◽  
Vol 715 ◽  
pp. 154-162 ◽  
Author(s):  
Justyna Maj ◽  
Michał Basista ◽  
Witold Węglewski ◽  
Kamil Bochenek ◽  
Agata Strojny-Nędza ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Residual Stresses ◽  
Squeeze Casting ◽  
Alumina Composites ◽  
Effect Of Microstructure

The Novel Heating Method for the Sample of Spectral Emissivity Measurement

2011 ◽  
Vol 148-149 ◽  
pp. 951-957 ◽  
Author(s):  
Li Xing ◽  
Zun Dong Yuan ◽  
Min Chen Guo ◽  
Dong Wei ◽  
Li Zhi Cai ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Surface Temperature ◽  
Spectral Emissivity ◽  
The Novel ◽  
Heating Method ◽  
Low Thermal Conductivity ◽  
Measurement Results ◽  
Potential Applications ◽  
Emissivity Measurement ◽  
The Impact

In order to eliminate the temperature difference between center measurement points and surface temperature of the material samples with low thermal conductivity, this paper introduces a new hot airflow double-sided heating method for sample, and describes its principle, application, and the impact of the existing and novel methods on the measurement results of spectral emissivity. Also, we analyze and compare the results of two different samples obtained with these two heating methods. The new method for material samples with low thermal conductivity has outstanding advantages and potential applications.

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