The present study was undertaken to investigate the effect of pre-aging and aging parameters (time and temperature) on the mechanical properties of Al-Mg-Zn (7075) alloys. Ultimate tensile strength, 0.5% offset yield strength and % elongation measurements were carried out on specimens prepared from cast and heat treated 7075 alloys. Aging treatments were carried out for the as solution treated ...

A technique for fatigue life prediction of metals is presented based on a microstructure-sensitive estimation plastic strain energy per cycle. The approach enables rapid temperature evolution, cyclic energy, and fracture entropy. Theoretical experimental results are low-carbon steel 1018 aluminum 7075-T6 specimens. It shown that the realistically predicts metallic

National Institute of Standards and Technology, Boulder, Colorado 80303 Valid comparison of impact test energies reported by various organizations and over time depends on consistent performance of impact test machines. This paper investigates the influence of various specimen and test parameters on impact energies in the 1 J to 2 J range for both Charpy V-notch and Izod procedures, leading tow...

The failure response of aluminum alloys (Al-6061 and Al-7075) under the condition of simultaneously pre-stressing and laser heating was investigated. Specimens were subjected to predetermined preloading states and then irradiated by continuous wave fiber (Yb) laser. For all specimens, it was found that the yield stress decreased with increasing laser power density. This implies that the load-be...

In this study, MAO process, which is one of the surface coating methods, was applied to 7075-T6 Al alloy in a thin thickness and relationship between its mechanical properties compared uncoated state investigated. Surface microstructure images prepared samples, from cross section eds analysis were measured by scanning electron microscope (SEM). With XRD analysis, peaks material on made determin...