سيدصالح حسيني هرندي

The aim of this study is to provide relations for predicting the solid particle erosion of a corroded titanium sample. Solid particle erosion is one of the main failure modes in compressor blades, which depends on several factors, including particle speed, angle, and size. Among these, corrosion of the target material as one of the most important factors aggravating erosion has been less addressed. In this regard and due to the multiplicity of effective factors, the need to develop numerical models is quite noticeable. In this research, Ti-6Al-4V alloy, which is one of the most widely used alloys in the construction of compressor blades, was chosen as the target material and the constitutive model of Johnson Cook-Zerilli Armstrong was chosen as the numerical base model and was developed under an experimental-analytical study for the corrosion. The mechanical properties of the corroded alloy were also eva‎luated along with the development of the numerical model. The results show that corrosion reduces the strength and stress levels in the Ti-6Al-4V alloy and causes it to become more brittle. That is why the reduction of the yield stress of the corroded specimens was reported as the 2nd order against its ultimate stress which decreases linearly. Examining the grain size of the corroded sample also shows that the alloy grain size does not change and only increases the distance between grains. Finally, relations were presented to predict each of the constants of the considered constitutive model, according to the corrosion time. The comparison of these relationships with the results of mechanical properties and erosion tests shows their appropriate accuracy in predicting solid particle erosion in the corroded sample.

فرسايش ذره جامد , خوردگي , مدل هاي ساختاري , پره كمپرسور , آلياژ Ti-6Al-4V

Solid Particle Erosion , Corrosion , Constitutive Models , Compressor Blade , Ti-6Al-4V Alloy

Seyyed Saleh Hosseini

Dr. Bijan Mohammadi