Effect of Different SiCp Particle Sizes on the Behavior of AA 7075 Hot Deformation Composites Using Processing Maps

Rajamuthamilselvan, M.; Rajakumar, S.; Kavitha, S.

doi:10.1007/978-981-15-8319-3_123

Cited by 1 publication

(2 citation statements)

References 29 publications

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“…To correlate the obtained results with the published data on aluminum alloys and aluminum matrix composites reinforced with other types of micro-and nanoparticles, summary graphs (see Figure 6) of the change in flow stress depending on temperature at a deformation rate of 0.1 s −1 are presented. Figure 6a shows that, for the aluminum alloy systems considered, the flow stress at 300 • C ranges from ~100 to ~200 MPa [35][36][37][38][39]. The highest values correspond to Al-Li alloys [35,36].…”

Section: Resultsmentioning

confidence: 99%

“…At 500 • C, the flow stress of the Al7075-based composite reinforced with 1.5 wt.% Al 2 O 3 nanoparticles was already ~125 MPa, which is 30% higher than that of A_CNT. Data on the effect of SiC microparticle size on the heat resistance of Al7075 alloy are given in [37]. The authors show that increasing the average size of SiC microparticles from 5 to 63 µm at 15 vol.% reinforcement led to an increase in the flow stress of the composite material.…”

Section: Resultsmentioning

confidence: 99%

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Increasing the Flow Stress during High-Temperature Deformation of Aluminum Matrix Composites Reinforced with TiC-Coated CNTs

et al. 2023

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In this work, composites based on AA5049 aluminium alloy reinforced with multiwalled carbon nanotubes (CNTs) and multiwalled TiC-coated CNTs were prepared by powder metallurgy. For the first time, the effect of TiC coating on the CNT surface on the flow stress of aluminum matrix composites under compressive conditions at 300–500 °C has been investigated. It was found that composites reinforced with TiC-coated CNTs have a higher flow stress during high-temperature deformation compared to composites reinforced with uncoated CNTs. Moreover, with an increasing temperature in the 300–500 °C range, the strengthening effect increases from 14% to 37%. Compared to the reference sample of the matrix material without reinforcing particles, obtained by the same technological route, the composites reinforced with CNTs and CNT-hybrid structures had a 1.8–2.9 times higher flow stress during high-temperature deformation. The presented results show that the modification of the CNTs surface with ceramic nanoparticles is a promising structure design strategy that improves the heat resistance of aluminum matrix composites. This extends the potential range of application of aluminum matrix composites as a structural material for operation at elevated temperatures.

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