Communications - Scientific Letters of the University of Zilina 2016, 18(3):78-82 | DOI: 10.26552/com.C.2016.3.78-82

Material Analysis of Degraded Steam Turbine Rotor

Petr Jonsta1, Irena lckova2, Zdenek Jonsta1, Roman Heide3
1 VSB-Technical university of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
2 RMTSC, Material & Metallurgical Research Ltd., Ostrava, remote site VUHZ, a. s., Dobra, Czech Republic
3 Favea Europe, s. r. o., Prague, Czech Republic

This article deals with structural, fractographic and non-destructive analysis of a defective rotor made of 26NiCrMoV14-5 steel and assessment of possible technological failures resulting in the occurrence of cracking and subsequent defects. Metallographic analysis of the microstructure and evaluation of the steel metallographic purity were executed, including analysis of inclusions present and ultrasonic testing. Attention was paid to fractographic analysis of fracture areas. Degradation possibilities were monitored in relation to technological failures. The aim was to elucidate the cause of the rotor defect hindering its operational use.

Keywords: material analysis; production technology; metallurgical purity; hydrogen embrittlement; degradation

Published: September 30, 2016  Show citation

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Jonsta, P., lckova, I., Jonsta, Z., & Heide, R. (2016). Material Analysis of Degraded Steam Turbine Rotor. Communications - Scientific Letters of the University of Zilina, 18(3), 78-82. doi: 10.26552/com.C.2016.3.78-82
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