Effect of grain refiners on the grain structure of 7050 aluminum alloy ingots
Low magnification microstructure observation was conducted on 7050 aluminum alloy ingots of different specifications using AlTi3C0.15 and AlTi5B1 refiners,and microstructure analysis and grain size measurement were performed on each ingot using optical microscopy and metallographic analysis software.The results show that the low magnification grain size of the ingot with AlTi 3C0.15 refiner is significantly larger than that of the ingot with AlTi5B1 refiner;The grain size at the 3/8 thickness position of the ingot with AlTi3C0.15 refiner is greater than that at the 1/2 thickness position,while the grain size at the 3/8 thickness position of the ingot with AlTi5B1 refiner is less than that at the 1/2 thickness position.