Effect of rapid cooling after continuous heating on microstructure and mechanical properties of Zr_(50)Cu_(34)Al_8Ag_8 amorphous alloy

摘要

The effects of rapid cooling after continuous heating on mechanical properties and microstructure of Zr50Cu34Al8Ag8 amorphous alloy are investigated. The microstructure of the alloy is analyzed by X-ray diffraction, differential scanning calorimetry, scanning electron microscopy and transmission electron microscopy. Experimental results show that the rapid cooling of the amorphous alloy after heating to 450 degrees C possesses the best comprehensive mechanical properties, which can be attributed to the formation of 4.65% ordered crystal structures in the amorphous matrix. When the heating temperature rises to 480 degrees C, a large number of hexagonal Al2Zr and Ag2Al phases precipitate in the amorphous matrix, thereby deteriorating the alloy properties.