|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Late News Posters
||PP-25: Oxidation-Induced Ferromagnetism in Nickel Gas Turbine Blades
||Mihkael Rigmant, Nataliya V Kazantseva, Denis Davidov, Sergei Demakov, Maxim Karabanalov, Denis Shishkin
|On-Site Speaker (Planned)
Increasing of the gas turbine power is an important task of the energy engineering. At usual conditions, all phases of the nickel super alloy used for the gas turbine blades are paramagnetic at the range of the operating temperatures. In this report, we present the results of the gas turbine nickel super alloy blades study after the exploitation under the experimental regime with the increased working temperature and speed of gas turbine rotation. By the magnetic and nondestructive tests, the strain-induced ferromagnetism on the blade surface is found. X-ray analysis of the feathers surface of the exploited blade shows the existence of the ferromagnetic oxides. SEM results show that these oxides were formed because of the chemical diffusion under high elastic stresses and temperatures. Possibility of nondestructive evaluation of the surface state to choice the recovery or utilization of the gas turbine blades is discussed.