Investigation of the fatigue and short-term mechanical properties of 13% chromium steel and titanium alloys after welding or treatment with high-frequency currents as applied to steam-turbine blades

2008 ◽  
Vol 55 (2) ◽  
pp. 149-153
Author(s):  
F. G. Gonserovskii ◽  
V. I. Nikitin ◽  
V. M. Silevich ◽  
O. N. Simin
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloys ◽  
Steam Turbine ◽  
High Frequency ◽  
Turbine Blades ◽  
Chromium Steel ◽  
Short Term ◽  
Steam Turbine Blades

Brazed coatings for steam turbine blades: impact of the tape architecture and composition on mechanical properties

2020 ◽  
Vol 111 (11) ◽  
pp. 916-922
Author(s):  
K. Bobzin ◽  
W. Wietheger ◽  
J. Hebing ◽  
L. Gerdt ◽  
H. Krappitz ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Steam Turbine ◽  
Volume Fraction ◽  
Steel Substrate ◽  
Turbine Blades ◽  
Surface Hardness ◽  
Three Point Bending ◽  
Wear And Corrosion ◽  
Steam Turbine Blades ◽  
Positive Effect

Abstract Ni-based brazing coatings with tungsten or chromium carbides are used for wear and corrosion protection in various applications. Steam turbine blades especially present a highly stressed application in which in particular the resistance to erosion and corrosion is essential. Therefore, novel tape architectures of brazed coatings have been developed and investigated within this study. In contrast to the use of powders, the application by means of tapes offers a high potential with regard to later use in industry due to the reproducible handling and automation. In this work, different coating systems were successfully deposited by means of vacuum brazing on X12CrNiMo-12 steel substrate. In order to achieve a sufficient fracture toughness of the coatings, pure nickel powder was added to the tapes. The influence of this additive on the mechanical properties was analyzed by means of three-point bending tests. A positive effect has been observed when adding a volume fraction of φ(Ni) = 25% of nickel, increasing the flexural strength up to σf = 580 MPa. Furthermore, the surface hardness of the coating has been analyzed depending on coating architecture and post-deposition treatment by grinding.

Study of wear mechanism of contact surfaces of steam turbine blades made of titanium VT6 alloy

2021 ◽  
pp. 81-89
Author(s):  
A.M. Zolotov ◽  
M.O. Smirnov ◽  
T.A. Chizhik
Keyword(s):  
Mechanical Properties ◽  
Steam Turbine ◽  
Wear Mechanism ◽  
Turbine Blades ◽  
Microstructural Analysis ◽  
X Ray ◽  
Different Types ◽  
Steam Turbine Blades ◽  
Contact Surfaces

The contact surfaces of the banding shelves of adjacent steam turbine blades made of titanium VT6 alloy after operation are studied by fractography, micro-X-ray and microstructural analysis and determination of mechanical properties. The different types of destruction of the contact surfaces are analyzed and explained. It is shown that the reason for intensive abrasion of the turbine blades' binding meshes is violation of the welding mode in the station conditions.

Effect of heat treatment on non-stationary modes on structure of pseudo-α-titanium alloys used for steam turbine blades

2020 ◽  
pp. 283-286
Author(s):  
I.V. Vornacheva
Keyword(s):  
Heat Treatment ◽  
Heat Resistance ◽  
Titanium Alloys ◽  
Steam Turbine ◽  
Structural Characteristics ◽  
Turbine Blades ◽  
Strength Properties ◽  
Thermocyclic Treatment ◽  
Steam Turbine Blades

The effect of thermocyclic treatment of pseudo-α-titanium alloys OT4 and VT20 on their structural and substructural characteristics is considered. Signifi cant change in structural characteristics is established, this contribu tes to increase in the strength properties of alloys with satisfactory ductility and heat resistance.

The Influence of Thermocyclic Treatment on the Structure and Mechanical Properties of Pseudo-Alpha Titanium Alloys for Steam Turbine Blades

2021 ◽  
Vol 1031 ◽  
pp. 117-124
Author(s):  
Vladimir Gadalov ◽  
Irina Vornacheva ◽  
Sergey Voinash ◽  
Vitaly Ignatenko ◽  
Evgeny Remshev
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloys ◽  
Structural Characteristics ◽  
Turbine Blades ◽  
Strength Properties ◽  
High Temperature Strength ◽  
Cycling Treatment ◽  
Thermocyclic Treatment ◽  
Alpha Titanium ◽  
Steam Turbine Blades

The influence of thermal cycling treatment of pseudo-α-titanium alloys OT4 and VT20 on their structural and substructural characteristics, as well as their mechanical properties is considered. A significant change in structural characteristics is established. This contributes to an increase in the strength properties of alloys with satisfactory ductility and high-temperature strength.

Diagnostics and monitoring of the operating condition of steam-turbine blades

2007 ◽  
Vol 41 (5) ◽  
pp. 295-301
Author(s):  
A. I. Danilin ◽  
S. I. Adamov ◽  
A. Zh. Chernyavskii ◽  
M. I. Serpokrylov
Keyword(s):  
Steam Turbine ◽  
Turbine Blades ◽  
Operating Condition ◽  
Steam Turbine Blades
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