Preparation Of Self-healing Aluminum Alloy And Its Performance Study

As a new type of special functional material,the self-healing alloy has a unique self-healing property.This paper is aimed at the difficulties in the preparation of self-healing alloy material,regard the 6063 series aluminum alloy as the base alloy,the low melting point alloy PbSn alloy as the healing material,design and process the self-healing aluminum alloy casting mold which can be taken part very fast,optimize the smelting and casting process of aluminum base self-healing alloy,study the micro structure,mechanical properties and repair effect of self-healing aluminum alloy systematically.The melting process of aluminum alloy matrix has the main following stages,the slow temperature rise at low temperature stage and the heat preservation of 10 min at 200 ?,add the aluminum alloy block and continue heating to 760 ?,after the aluminum alloy is melted then mixed after that make a heat preservation for 20 min,the alloy can be fully melted,remove the slag before casting to make the casting performance excellent,successfully prepared the self-healing aluminum alloy block with the length,breadth and height of 90 mm×20 mm×15 mm.Tensile tests showed that both of the maximum tensile strength and yield strength of the self-healing aluminum alloy can reach about 83.3% of the original alloy,alloy self-healing test results show that the maximum crack repair rate can reach 85%,the results show that the self-healing effect of the alloy is ideal.The scanning electron microscopy and energy spectrum analysis show that the base aluminum alloy which has been healed has effective diffusion and permeation with the low melting point alloy,the matrix aluminum alloy has a good bonding interface with the low melting point alloy.