The Effect of Specimen Size and Preparation Method on the Mechanical Properties of Ti-6al Sheets

Abstract

In this study, a research is conducted to determine the effects of tensile test specimens prepared from 0.5 mm thick Ti-6Al-4V material, which is widely used in aviation industry, and the effects of preparation method on yield strength, ultimate tensile strength and fracture strain. In the experiments, tensile specimens of two different sizes in ASTM-E8 standard and cutting processes with laser, waterjet and Electrical Discharge Machining (EDM) are selected as preparation methods. When the results obtained from the tensile tests are evaluated, it is seen that the stress and strain values obtained as a result of repeated tests are more consistent in the samples cut with waterjet, while relatively inconsistent results are obtained from the samples of other cutting processes. It is also determined that the sample size affects the stress strain values at some extend.