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

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.

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Effect of the Weld Joint Configuration on Stressed Components, Residual Stresses and Mechanical Properties

Materials Testing ◽

10.3139/120.110557 ◽

2014 ◽

Vol 56 (4) ◽

pp. 279-284 ◽

Cited By ~ 1

Author(s):

Bekir Çevik ◽

Alpay Özer ◽

Yusuf Özçatalbaş

Keyword(s):

Mechanical Properties ◽

Residual Stresses ◽

Weld Joint ◽

Joint Configuration

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Enhanced mechanical properties of 6082 aluminum alloy via SiC addition combined with squeeze casting

Journal of Material Science and Technology ◽

10.1016/j.jmst.2021.01.077 ◽

2021 ◽

Author(s):

Wenming Jiang ◽

Junwen Zhu ◽

Guangyu Li ◽

Feng Guan ◽

Yang Yu ◽

...

Keyword(s):

Mechanical Properties ◽

Aluminum Alloy ◽

Squeeze Casting ◽

6082 Aluminum Alloy

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Mechanical properties of rotary swaged steel components

Forschung im Ingenieurwesen ◽

10.1007/s10010-021-00498-3 ◽

2021 ◽

Author(s):

Dhia Charni ◽

Svetlana Ortmann-Ishkina ◽

Marius Herrmann ◽

Christian Schenck ◽

Jérémy Epp

Keyword(s):

Mechanical Properties ◽

Residual Stresses ◽

Strain Curve ◽

Dynamic Mechanical Properties ◽

Process Conditions ◽

Forming Process ◽

Rotary Swaging ◽

Surface Residual Stresses ◽

Near Net Shape ◽

As Stress

AbstractThe radial infeed rotary swaging is widely used as a diameter reduction forming process of axisymmetric workpieces, improving the mechanical properties with excellent near net shape forming. In the present study, rotary swaging experiments with different parameter setups were performed on steel tubes and bars under different material states and several resulting property modifications were investigated such as stress-strain curve, hardness, fatigue strength and surface residual stresses. The results show a significant work hardening induced by the rotary swaging process and an improvement in the static and dynamic mechanical properties was observed. Furthermore, the hardness distribution was homogenous in the cross section of the rotary swaged workpieces. Moreover, depending on the process conditions, different residual stresses distribution were generated along the surface.

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Mechanical Properties of Zirconia Toughened Alumina Composites with TZP Partially Nanostructured Sintered by Liquid Fase

Materials Science Forum ◽

10.4028/www.scientific.net/msf.591-593.436 ◽

2008 ◽

Vol 591-593 ◽

pp. 436-440

Author(s):

João Marcos K. Assis ◽

Francisco Piorino Neto ◽

Francisco Cristóvão Lourenço de Melo ◽

Maria do Carmo de Andrade Nono

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Weibull Modulus ◽

Bending Test ◽

Sintering Aid ◽

Zirconia Composites ◽

Alumina Composites ◽

Grain Size And Shape ◽

Zirconia Toughened Alumina ◽

Zirconia Powders

A comparative study between alumina added niobia ceramics and two alumina zirconia composites from nanostructured TZP (7% and 14% weight) was made. On this composites the zirconia were yttria stabilized and the alumina were submicron structured. As sintering aid a mixture of magnesia, niobia and talc were used on all samples. The sintering was performed at 1450 oC during 60 minutes. The characteristic grain size and shape of an alumina and zirconia powders, aggregates and agglomerates were characterized. The sintering ceramics were evaluated through hardness, fracture toughness and 4 point bending test. Weibull statistic was applied on the flexural results. Although the fracture toughness result from ZTA were lower, and seems to be affected by the liquid fase, the hardness and Weibull modulus were higher than alumina niobia. The grains size and the homogeneity of its distributions on the microstructure of this ceramics was correlated to these higher values. The results from these alumina zirconia composites showed a potential to apply as a ballistic armor material.

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