The thermal conductivity mechanism of aluminum alloy is introduced briefly. And the factors influencing the thermal conductivity of aluminum alloy is summarized. The measures such as controlling composition, adding rare earth, technology for heating processing to improve the thermal conductivity of the aluminum alloy are analyzed. Research status of the thermal conductivity mechanism of aluminum alloy in domestic and overseas are summarized. The developing situation and future development prospects were given as well.

Al-Ti-B master alloy is the most widely used grain refiner in the aluminum fabrication industry, while it’s refinement mechanism is not clearly understand yet. The TiB2 in Al-Ti-B master alloy is one of important phase to grain refining, which intimately related to the generation of initial nucleus, the “fading” phenomenon of refining effect declines with the increase of holding or standing time in grain refining process. Besides, TiB2 is analyzed in several studies about the “poisoning” phenomenon, a large extent weaken of refining effect when Zr, Cr, Mn etc. exists. In this article, the impact of TiB2 to the refining effect of Al-Ti-B master alloy is discussed aiming at the roles and phenomenon mentions above.

This paper reviews several main modification methods of Al-Ti-B master alloy, including high-intensity ultrasound, equal channel angular pressing, conform, and electromagnetic stirring. Attention is directed to the principles and characteristics of various methods, as well as the researches related to Al-Ti-B master alloy. This review also indicates the existing problems of the technology, and the development direction of the modification of Al-Ti-B master alloy in the future.