Failure of Die Cast Aluminum Cluster Bomb Tailcone Assemblies

2019 ◽  
Keyword(s):  
Cast Aluminum ◽  
Aluminum Cluster ◽  
Die Cast ◽  
Cluster Bomb

Research on the microstructure, fatigue and corrosion behavior of permanent mold and die cast aluminum alloy

2014 ◽  
Vol 55 ◽  
pp. 353-360 ◽  
Author(s):  
Zuqi Hu ◽  
Li Wan ◽  
Shulin Lü ◽  
Peng Zhu ◽  
Shusen Wu
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Cast Aluminum Alloy ◽  
Permanent Mold ◽  
Cast Aluminum ◽  
Die Cast

The Role of Anodization in Naturally Cooled Heat Sinks for Power Electronic Devices

2020 ◽  
Vol 142 (5) ◽  
Author(s):  
Zhongchen Zhang ◽  
Michael Collins ◽  
Eric Lau ◽  
Chris Botting ◽  
Majid Bahrami
Keyword(s):  
Aluminum Alloy ◽  
Thermal Radiation ◽  
Electronic Devices ◽  
Heat Sinks ◽  
Al Alloy ◽  
Cast Aluminum Alloy ◽  
Power Electronic ◽  
Cast Aluminum ◽  
Die Cast ◽  
Alloy 6061

Abstract Effect of anodization on the thermal performance of naturally cooled heat sinks in power electronic devices made of die-cast aluminum alloy A380 and machined aluminum alloy 6061 was investigated experimentally and numerically. Various types of anodization were examined with different thickness of anodic aluminum oxide layer (AAO), pore size distributions, and surface coloring conditions. A customized natural convection and thermal radiation experimental chamber was built to measure the cooling capacity and heat sink temperatures. A 3D numerical model was also developed and validated against the collected data to provide more details into the contribution of the radiation heat transfer. The total emittance of the anodized samples was determined by a Fourier transform infrared reflectometer (FTIR) spectroscopy method. The results show a significant improvement in total hemispherical emissivity from 0.14 to 0.92 in anodized die-cast aluminum samples. This increase resulted in a considerable reduction in overall thermal resistance, up to 15%; where up to 41% of the total heat dissipation was contributed by thermal radiation. In spite of the rather distinguishable surface morphologies, the measurements suggested that thermal emissivity of the anodized die-cast Al A380 and Al alloy 6061 samples were in the same range.

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