Abstract
The thermal conductivity of alloys is gradually becoming appreciated. It is often assumed that heat treatment can improve the thermal conductivity of Al-Si-Mg-Cu alloys, but there has been little relevant research. This paper studies the effects of different casting processes and short T6 heat treatment (ST6) on the thermal conductivity and mechanical properties of Al-Si-Mg-Cu alloys. The results show that a microstructure with fine α-Al crystal grains can be obtained by semi-solid die casting (SSDC), improving the mechanical properties of the Al-Si-Mg-Cu alloy in the as-cast state. After SSDC, the size and aspect ratio of eutectic silicon can be reduced by ST6 treatment, effectively improving the thermal conductivity and mechanical properties of the alloy. Finally, the influence of eutectic silicon on electron transport is analyzed in detail. With the SSDC + ST6 processing technology, Al-Si-Mg-Cu alloys with excellent thermal conductivity and mechanical properties can be obtained.
Highlights
The melt was cooled to 690 ◦ C and injected into the pressure chamber of a die casting machine (YIZU-MI400T, YIZUMI, Foshan, China) through a 45 degrees inclined vibration channel at a rate of 40% to obtain a semi-solid die casting alloy (SSDC)
Al-Si-Mg-Cu in the SSDC process was reduced to 86.6 μm, and the ultimate tensile strength (UTS) value of as-cast Al-Si-Mg-Cu alloys increased to 281.4MPa
Under the same aging conditions, the thermal conductivity of the alloys was mainly affected by the morphology and alloys increased to 281.4 MPa
Summary
To ensure the stable operation of the base station and prevent work efficiency from being impaired by high-temperature frequency reduction, it is necessary to add a heat dissipation module for the equipment
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
