Investigation of material density after rolling

Vital parts of aircraft engines must comply with strict requirements concerning their ultimate strength and, especially, strength distribution over cross-sections. Furthermore, in the context of growing competition with the European Union and the United States, continuous improvement of manufacturing techniques for these parts is required in order to improve the strength properties and reduce the cost of their production. In this case, it is very important to study the change of material density under different deformation conditions. A hot rolling technology for the workpiece of a high-pressure compressor blade is developed. It enables high strength of the part and increases metal utilization. The strength of the workpiece is investigated by identifying and comparing the material density of the workpiece exposed to hot forge-rolling on forging rolls before and after rolling. The results of the study are analyzed. It is shown that the strength of the material significantly increases with increased density. The results indicate the need of implementing this technology in the production of gas turbine engine blades. This study was conducted in FSUE Gas Turbine SPC «Salut», which is currently introducing the hot forge-rolling of gas turbine engine blades.

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