Production of Nanostructured Fasteners with High Shear and Fatigue Strength for Using in Aircraft Components

Multi-axis forging (MAF) and cyclic heat treatment are among the most widely used easy to apply grain refinement methods. In this study, micro-alloyed steel samples were first subjected MAF treatments at 880° C. Microstructural analysis showed that average size, which was 13.2 µm initially, decreased 11.2 application of MAF. As a second-grain technique, used. Samples 1, 3, 5, 7, 10 quenching. With method, it observed size 2,3 µm. The mechanical tests second process increased yield tensile strength material by about 16% while decreasing elongation %2. These also presented quenching after application.