Direct Laser Forming for More Complex Shaped Titanium Alloy Compacts

In this article, perspective using of the laser deposition method for manufacture details from the titanium alloy VT20 is considered. Dependence on a structure of the fractional composition is shown. Study of the structure and properties of parts, which were produced by DLD technology using different modes and under different conditions.

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Reconditioning of nickel base HPT blades and vanes used in aero engines and power plant gas turbines by combination of direct laser forming, laser metal deposition and laser drilling

Pacific International Conference on Applications of Lasers and Optics ◽

10.2351/1.5056928 ◽

2006 ◽

Cited By ~ 3

Author(s):

Ingomar Kelbassa ◽

Ernst Wolfgang Kreutz ◽

Christoph Over ◽

Lena Trippe ◽

Konrad Wissenbach

Keyword(s):

Power Plant ◽

Gas Turbines ◽

Laser Drilling ◽

Metal Deposition ◽

Laser Forming ◽

Laser Metal Deposition ◽

Direct Laser ◽

Aero Engines ◽

Nickel Base

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Structural, mechanical and in vitro characterization of individually structured Ti–6Al–4V produced by direct laser forming

Biomaterials ◽

10.1016/j.biomaterials.2005.07.041 ◽

2006 ◽

Vol 27 (7) ◽

pp. 955-963 ◽

Cited By ~ 284

Author(s):

Dirk A. Hollander ◽

Matthias von Walter ◽

Tobias Wirtz ◽

Richard Sellei ◽

Bernhard Schmidt-Rohlfing ◽

...

Keyword(s):

Laser Forming ◽

In Vitro Characterization ◽

Direct Laser

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Using FEM Analysis for Evaluating Lifetime of the Turbine Blades Repaired by Different Kinds of Titanium and Nickel Alloys

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.47-50.37 ◽

2008 ◽

Vol 47-50 ◽

pp. 37-40

Author(s):

Aleksandrs Korjakins ◽

Sergejs Gluhihs ◽

Andrejs Popovs ◽

Aleksandr Tiskunov

Keyword(s):

Strain State ◽

Turbine Blades ◽

Fem Analysis ◽

Laser Forming ◽

Stress Strain ◽

Element Analysis ◽

Stress Strain State ◽

Wide Range ◽

Direct Laser ◽

Attractive Option

With increasing attention being devoted to the problem of reducing service costs for a wide range of turbines and compressors, an attractive option is repair of damaged blades, instead of replacing them by new ones. A lot of different methods are used to repair blades and other parts of turbines and compressors. The processes of laser metal deposition (LMD) and direct laser forming (DLF) are modern methods used to repair blades made of titanium alloys. In the present study, the finite element analysis (FEM) has been applied to determine the stress-strain state of the repaired blades in service conditions. Different forms and sizes of the damaged zones have been analyzed. Several kinds of alloys, such as Incoloy 903, Carlson C800 and Inconel 718, appropriate for the LMD and DLF methods, have been utilized in repairing the blades. Two kinds of blades, with and without cooling hollows, have been examined. Lifetime of the repaired turbine has been evaluated by comparing the results obtained from the modal and stress-strain state analyses of the repaired and original parts. The results allow evaluating influence of sizes and forms of the damaged zones, as well as choice of the alloys applied, on lifetime of the repaired blades.

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