Review of Superalloy Powder Metallurgy Processing for Aircraft Gas Turbine Applications

2009 ◽  
pp. 564-564-14 ◽  
Author(s):  
JL Bartos
Keyword(s):  
Powder Metallurgy ◽  
Gas Turbine ◽  
Superalloy Powder

Life Extending Advanced Component Repairs — Field Operating Experience

2000 ◽  
Author(s):  
Lloyd A. Cooke
Keyword(s):  
Powder Metallurgy ◽  
Gas Turbine ◽  
Operating Experience ◽  
High Strength ◽  
Operating Environment ◽  
Repair Materials ◽  
New Generation ◽  
Filler Metals ◽  
Selection Of ◽  
Repair Techniques

Advanced repair technologies have been introduced to the gas turbine industry over recent years. An increasing selection of coating systems is available which can be tailored to the specific operating environment. Automated welding systems and the use of custom weld filler metals for enhanced component life provide a means of reliably welding the new generation of high strength turbine blade alloys. Powder metallurgy processes have been introduced as an alternative to welding and have been used to upgrade certain components by employing higher strength repair materials than the original castings. In the paper, these and other technologies are assessed based on engine operating experience with direct comparison to the conventional repair techniques which they have replaced.

Effects of C and Hf Concentration on the Mechanical Properties of Wrought Superalloys Based on NASA IIB-11 Produced From Prealloyed Powders

1976 ◽  
Author(s):  
R. V. Miner
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Gas Turbine ◽  
Rupture Strength ◽  
Gas Turbine Engine ◽  
Turbine Engine ◽  
Grain Sizes

This work describes the effects of C and Hf concentration on the mechanical properties of NASA IIB-11, a candidate material for advanced-temperature gas turbine engine disks. IIB-11 and four alloys of varied C and Hf concentrations were produced as cross-rolled disks from hot-isostatically pressed powder billets. The lower C, higher Hf modification exhibited the best mechanical properties at 760 C and below. These properties were at least equivalent to those of other candidate alloys for advanced temperature disks. Because of their finer grain sizes, all of these powder metallurgy alloys had lower rupture strength, however, than that achieved previously in conventionally processes IIB-11.

Review of new Forming Methods Pertinent to the Gas Turbine Industry

1972 ◽  
Author(s):  
K. M. Kularni ◽  
G. M. Glenn
Keyword(s):  
Powder Metallurgy ◽  
Gas Turbine ◽  
Basic Principle ◽  
Present Status ◽  
Metal Forming ◽  
Squeeze Casting ◽  
Development Work ◽  
Radial Forging ◽  
Production Processes ◽  
Forming Methods

In the last few years a number of new metal forming techniques have been developed. Some of these which have a potential for becoming important production processes for gas turbine components are reviewed. For each method, the basic principle is first explained, then its present status is reviewed, and some areas in which additional development work is required are pointed out. Finally, the gas turbine components for which the method may be used are indicated. Processes considered include isothermal forging, contoured cross rolling, squeeze casting, radial forging, form rolling, and forging of powder metallurgy preforms.

The Gas Turbine

1906 ◽  
Vol 61 (1569supp) ◽  
pp. 25137-25138
Keyword(s):  
Gas Turbine
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