scholarly journals Effect of Microstructure on High-Temperature Mechanical Behavior of Nickel-Base Superalloys for Turbine Disc Applications

2011 ◽  
Vol 278 ◽  
pp. 259-264 ◽  
Author(s):  
Heather J. Sharpe ◽  
Ashok Saxena
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Powder Metallurgy ◽  
Creep Crack Growth ◽  
Operating Conditions ◽  
Test Material ◽  
High Temperature Mechanical Properties ◽  
Turbine Disc ◽  
Alloy Microstructure ◽  
Nickel Base

The objective of this work was to establish relationships between alloy microstructure and high temperature mechanical properties such as strength, creep, and creep crack growth in Nickel-base powder metallurgy superalloys. Systematic variations of super solvus heat-treatments generated test material from three next-generation turbine disc alloys. Quantification of key microstructural features such as γ’ distribution and morphology and grain boundary serrations was coupled with mechanical testing results in order to optimize microstructure for operating conditions specific to the bore region.

HASTELLOY ALLOY S

Alloy Digest ◽  
1973 ◽  
Vol 22 (1) ◽  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Heat Treating ◽  
High Temperature Alloy ◽  
Excellent Thermal Stability ◽  
Cabot Corporation ◽  
High Temperature Mechanical Properties ◽  
Temperature Performance ◽  
Resistance To Oxidation ◽  
Nickel Base

Abstract HASTELLOY alloy S is a nickel-base high-temperature alloy having excellent thermal stability, good high-temperature mechanical properties and excellent resistance to oxidation up to 2000 F. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-184. Producer or source: Stellite Division, Cabot Corporation.

Nanoanalysis of precipitation in a modified Inconel 718 alloy

1994 ◽  
Vol 52 ◽  
pp. 702-703
Author(s):  
J. Liu ◽  
J. X. Dong ◽  
M. Z. Chen ◽  
X. S. Xie
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Inconel 718 ◽  
Analytical Electron Microscopy ◽  
Intermetallic Phases ◽  
Nickel Base Superalloy ◽  
Microstructural Stability ◽  
Inconel 718 Alloy ◽  
High Temperature Mechanical Properties ◽  
Nickel Base

The nickel-base superalloy Inconel 718 (IN718) is strengthened primarily by precipitation of two types of intermetallic phases in the austenite (γ) matrix: metastable γ' (cubic Ll2 structure) and γ" (tetragonal D022 structure) precipitates. Minor changes of the chemistry of the IN718 alloy can significantly affect its mechanical properties at high temperatures. It has been found that the microstructural stability of the precipitates and the high temperature performance of IN718 depend critically on the (Ti+Al)/Nb and Al/Ti ratios. The small sizes of these intermetallic phases and the fact that γ' precipitates are frequently associated with γ" precipitates in modified IN718 make it difficult to determine their composition. In this study, nanometer resolution analytical electron microscopy techniques have been used to characterize the structure, the morphology and the composition of the precipitated phases.The fabrication and the heat treatment of the modified IN718 alloy and its high temperature mechanical properties have been reported elsewhere.

UDIMET HX

Alloy Digest ◽  
1971 ◽  
Vol 20 (12) ◽  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
High Temperature Mechanical Properties ◽  
Temperature Performance ◽  
Nickel Base

Abstract UDIMET HX is a nickel-base alloy that was developed for high temperature service. It has excellent oxidation resistance and good high temperature mechanical properties. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-166. Producer or source: Special Metals Corporation.

Mechanical Properties of Rapidly Solidified Nickel-Base Superalloys and Intermetallics

1985 ◽  
Vol 58 ◽  
Author(s):  
A. I. Taub ◽  
M. R. Jackson
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Powder Metallurgy ◽  
Rapid Solidification ◽  
Plasma Deposition ◽  
Spray Forming ◽  
Hot Workability ◽  
Solidification Processing ◽  
Nickel Base ◽  
Rapidly Solidified

ABSTRACTThe improvements in the mechanical properties of nickel-base alloys that have been made possible by rapid solidification processing are reviewed. The results of processing by powder metallurgy, laser melting, low pressure plasma deposition and spray forming are examined. In general, the increased homogeneity obtained by rapid solidification allows for increased alloying and improved hot workability. The refined grain size improves the low and intermediate temperature strength, but leads to lower strengths at high temperature. For the high temperature applications, post solidification grain growth is required, as for example the directional recrystallization of powder metallurgy preforms. The development of a novel means of producing a fine dispersion from amorphous alloy precursors and the recent work attempting to improve the ductility of the intermetallic phases NiAl and Ni3A1 are also described.

High-Temperature Mechanical Properties of Powder Metallurgy: Porous Lightweight Titanium Nanolaminates

2006 ◽  
Vol 25 (1-2) ◽  
pp. 47-58 ◽  
Author(s):  
S.A. Firstov, ◽  
E.P. Pechkovsky, ◽  
I.I. Ivanova, ◽  
N.P. Brodnikovsky, ◽  
V.F. Gorban, ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Powder Metallurgy ◽  
High Temperature Mechanical Properties
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