Abstract：During the inspection of 2219 ring forgings, it was found that there were defects inside, which were about 5 mm from the inner diameter and 80 mm from the end face. The flaw detection showed that the defects were long strips with the length of about 30 mm, and the direction was parallel to the diameter direction of the forgings. In order to analyze the causes of the defects, the macrostructure, microstructure, scanning electron microscopy and energy spectrum analysis of the defective samples were studied in the laboratory. The results showed that the defects of 2219 aluminum alloy ring forging were hole defects, which were caused by the low AlZr input temperature during smelting. It reduced the diffusion rate of elements and increased the segregation of AlZr alloy phase, leading to the formation of hole defects.
Hideo Yoshida, Yoshio Baba.The role of zirconium to improve strength and stress-corrosion resistance of Al-Zn-Mg and Al-Zn-Mg-Cu alloys[J]. Transaction of the Japan Institute of Metals, 1982,23(10):620.
2023, Vol. 41 
