Microstructural Characterization of Some Turbine Blade Martensitic Stainless Steels

Berbecaru, Andrei Constantin; Coman, George; Gradinaru, Catalin Stefan; Sohaciu, Mirela Gabriela; Predescu, Cristian; Dumitrescu, Ruxandra Elena; Ciuca, Sorin; Gherghescu, Ioana Arina

Andrei Constantin Berbecaru, George Coman, Catalin Stefan Gradinaru, Mirela Gabriela Sohaciu, Cristian Predescu, Ruxandra Elena Dumitrescu, Sorin Ciuca, Ioana Arina Gherghescu

Microstructural Characterization of Some Turbine Blade Martensitic Stainless Steels

Abstract:

The paper presents microstructural features of three stainless steels utilized in making hydropower turbine parts. Two of these steels were already used in producing these parts, the third one is newly conceived. Aiming better mechanical and corrosion resistance characteristics, steels were produced using an induction furnace with cold crucible under vacuum and argon atmosphere, striving for an inclusion - free state. Quenching and tempering heat treatments were subsequently applied. The microstructural investigations, carried-out by microhardess testing, optical and scanning electron microscopy (SEM) associated with energy dispersive spectrometry (EDS), were able to explain the structural modifications. Refined microstructures were found in the two first steels. Concerning the third one, a precipitation phenomenon of intermetallic compounds such as Ni3(Ti,Mo) was reported, similar to that encountered in the maraging steels class. Mechanical properties of this steel are very different from classic martensitic stainless steels ones. Specifically, after tempering the hardness values do not decrease as in other steels, but increase about 1.6 times. Thus a new steel category with duplex properties is reported.

Keywords:
turbine rotor blade; new martensitic steel; maraging steel

Issue: 2019, Volume 70, Issue 4

Pages: 1132-1139

Publication date: 2019/5/15

https://doi.org/10.37358/RC.19.4.7078

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This article is published under the Creative Commons Attribution 4.0 International License

Citation Styles

Cite this article as:
BERBECARU, A.C., COMAN, G., GRADINARU, C.S., SOHACIU, M.G., PREDESCU, C., DUMITRESCU, R.E., CIUCA, S., GHERGHESCU, I.A., Microstructural Characterization of Some Turbine Blade Martensitic Stainless Steels, Rev. Chim., 70(4), 2019, 1132-1139.

Vancouver
Berbecaru AC, Coman G, Gradinaru CS, Sohaciu MG, Predescu C, Dumitrescu RE, Ciuca S, Gherghescu IA. Microstructural Characterization of Some Turbine Blade Martensitic Stainless Steels. Rev. Chim.[internet]. 2019 Apr;70(4):1132-1139. Available from: https://doi.org/10.37358/RC.19.4.7078

APA 6th edition
Berbecaru, A.C., Coman, G., Gradinaru, C.S., Sohaciu, M.G., Predescu, C., Dumitrescu, R.E., Ciuca, S. & Gherghescu, I.A. (2019). Microstructural Characterization of Some Turbine Blade Martensitic Stainless Steels. Revista de Chimie, 70(4), 1132-1139. https://doi.org/10.37358/RC.19.4.7078

Harvard
Berbecaru, A.C., Coman, G., Gradinaru, C.S., Sohaciu, M.G., Predescu, C., Dumitrescu, R.E., Ciuca, S., Gherghescu, I.A. (2019). 'Microstructural Characterization of Some Turbine Blade Martensitic Stainless Steels', Revista de Chimie, 70(4), pp. 1132-1139. https://doi.org/10.37358/RC.19.4.7078

IEEE
A.C. Berbecaru, G. Coman, C.S. Gradinaru, M.G. Sohaciu, C. Predescu, R.E. Dumitrescu, S. Ciuca, I.A. Gherghescu, "Microstructural Characterization of Some Turbine Blade Martensitic Stainless Steels". Revista de Chimie, vol. 70, no. 4, pp. 1132-1139, 2019. [online]. https://doi.org/10.37358/RC.19.4.7078

Text
Andrei Constantin Berbecaru, George Coman, Catalin Stefan Gradinaru, Mirela Gabriela Sohaciu, Cristian Predescu, Ruxandra Elena Dumitrescu, Sorin Ciuca, Ioana Arina Gherghescu,
Microstructural Characterization of Some Turbine Blade Martensitic Stainless Steels,
Revista de Chimie,
Volume 70, Issue 4,
2019,
Pages 1132-1139,
ISSN 2668-8212,
https://doi.org/10.37358/RC.19.4.7078.
(https://revistadechimie.ro/Articles.asp?ID=7078)
Keywords: turbine rotor blade; new martensitic steel; maraging steel

RIS
TY - JOUR
T1 - Microstructural Characterization of Some Turbine Blade Martensitic Stainless Steels
A1 - Berbecaru, Andrei Constantin
A2 - Coman, George
A3 - Gradinaru, Catalin Stefan
A4 - Sohaciu, Mirela Gabriela
A5 - Predescu, Cristian
A6 - Dumitrescu, Ruxandra Elena
A7 - Ciuca, Sorin
A8 - Gherghescu, Ioana Arina
JF - Revista de Chimie
JO - Rev. Chim.
PB - Revista de Chimie SRL
SN - 2668-8212
Y1 - 2019
VL - 70
IS - 4
SP - 1132
EP - 1139
UR - https://doi.org/10.37358/RC.19.4.7078
KW - turbine rotor blade
KW - new martensitic steel
KW - maraging steel
ER -

BibTex
@article{RevCh2019P1132,
author = {Berbecaru Andrei Constantin and Coman George and Gradinaru Catalin Stefan and Sohaciu Mirela Gabriela and Predescu Cristian and Dumitrescu Ruxandra Elena and Ciuca Sorin and Gherghescu Ioana Arina},
title = {Microstructural Characterization of Some Turbine Blade Martensitic Stainless Steels},
journal = {Revista de Chimie},
volume = {70},
number = {4},
pages = {1132-1139},
year = {2019},
issn = {2668-8212},
doi = {https://doi.org/10.37358/RC.19.4.7078},
url = {https://revistadechimie.ro/Articles.asp?ID=7078}
}

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