Development of a New Nickel-base Superalloy for High Temperature Applications

2010 ◽  
Vol 1276 ◽  
Author(s):  
Octavio Covarrubias
Keyword(s):  
Elevated Temperatures ◽  
Base Alloy ◽  
Stress Rupture ◽  
Energy Generation ◽  
Nickel Base Superalloy ◽  
Jet Engines ◽  
Microstructural Stability ◽  
Alternative Material ◽  
Nickel Base ◽  
The Stability

AbstractSince their appearance during in the 1940 decade, nickel-base alloys are appreciated for their superior mechanical properties and microstructural stability at elevated temperatures and high stresses. They are typically used in jet-engines and land-based turbines for energy generation. Such materials, known as superalloys are in constant evolution as designers are encouraged to propose more efficient and powerful systems of propulsion and energy generation. This evolution leads to conceive and manufacture new superalloys capable to fulfill higher requirements. Alloy 718Plus® is emerging as an alternative material for the design and construction of components to be used in jet-engines and land-based turbines for energy generation. 718Plus® is a precipitation hardened nickel-base alloy designed to have the stability of superalloys similar to Waspaloy and the good processing characteristics of other materials as the 718 alloy. Since the early 2000 decade, ATI Allvac has lead a complete program in order to validate capabilities and properties of the 718Plus® alloy. Objectives for this effort include a characterization and its introduction as a viable material for the design and manufacture of components to be installed technologically. As part of this project, contoured rings made of 718Plus® are rolled considering industrial conditions. Several heat treatments, involving solution and precipitation processes are performed on segments extracted from involved contoured rings. Effects of such hot-working conditions and heat treatment procedures on properties as forgeability, tensile, hardness and stress-rupture characteristics are evaluated. Optical and electron microscopy are performed to evaluate microstructural properties as grain size and promotion of precipitates, in order to complement reported results.

scholarly journals Microstructural and Mechanical Effects of Thermo-Mechanical Processing on ATI 718Plus® Contoured Rings

2011 ◽  
Vol 278 ◽  
pp. 271-276 ◽  
Author(s):  
Octavio Covarrubias
Keyword(s):  
Elevated Temperatures ◽  
Stress Rupture ◽  
Ring Rolling ◽  
Nickel Base Superalloy ◽  
Present Contribution ◽  
Suitable Material ◽  
Nickel Base ◽  
Stress Rupture Testing ◽  
Base Superalloy ◽  
Precipitation Heat

ATI 718Plus® is a nickel-base superalloy designed to promote resistance and thermal stability at elevated temperatures. Beside these properties, this material presents superior formability during forging operations, making ATI 718Plus® a suitable material for the manufacture of non-rotating and rotating components for jet engine and land-based turbines. Present contribution summarizes main results when several contoured rings were produced by ring-rolling processes considering selected parameters as temperature and deformation ratio. Effect of solution and precipitation heat treatments on ATI 718Plus® microstructure and mechanical properties are also reported. These results include tensile testing at elevated temperature and stress-rupture testing. Microstructural evaluations performed by optical microscopy and electronic microscopy, complement reported results.

Effect of Al Addition in Cast Nickel Base Superalloy, GTD-111 on Microstructures and Oxidation Behaviors at 900°C and 1000°C

2014 ◽  
Vol 548-549 ◽  
pp. 268-273 ◽  
Author(s):  
Panyawat Wangyao ◽  
Tawanrat Eiriyakul ◽  
Sureerat Polsilapa ◽  
Pajaree Srigiofun ◽  
Ornin Srihakulang
Keyword(s):  
Elevated Temperatures ◽  
Research Work ◽  
Intermetallic Phase ◽  
Vacuum Arc ◽  
Nickel Base Superalloy ◽  
Microstructural Stability ◽  
Protective Oxide ◽  
Al Addition ◽  
Nickel Base ◽  
Base Superalloy

The objective of this research work is to investigate the effect of Aluminum addition in cast nickel base superalloy grade GTD-111 by vacuum arc melting process on microstructural modification and oxidation behavior at elevated temperatures of 900°C and 1000°C. The Al element, basically, could be added in cast nickel base superalloys in proper amount to form precipitated intermetallic phase with nickel atoms as gamma prime phase (γ’, Ni3Al) to increase mechanical properties at elevated temperatures. Furthermore, Al can assist nickel base superalloy to form protective oxide film, Al2O3 for better oxidation resistance at very high temperatures. In this research, all casted samples of GTD-111 with various Al additions for 1, 2 and 3 percent by weight were solutioning treated at 1125°C for 6 hours and following with precipitatation aging at 845°C for 24 hours. The oxidation tests were carried out at temperatures of 900°C and 1000°C up to 110 hours. From all obtained results, it was found that the sample that has the most microstructural stability after long-term heating as simulated working conditions is GTD-111 sample with 2%wt. Al addition. Furthermore, more Al addition had resulted in higher oxidation resistances for both testing temperatures.

SANICRO 71

Alloy Digest ◽  
1965 ◽  
Vol 14 (12) ◽  
Keyword(s):  
Nuclear Power ◽  
Elevated Temperatures ◽  
Power Reactor ◽  
Base Alloy ◽  
Heat Treating ◽  
Good Resistance ◽  
Nuclear Power Reactor ◽  
Temperature Performance ◽  
Resistance To Stress ◽  
Nickel Base

Abstract Sanicro 71 is a nickel-base alloy having good resistance to stress-corrosion, oxidation and creep at elevated temperatures. It is recommended for nuclear power reactor heat exchanger tubes, aircraft turbojet engines and for equipment in the textile, plastic, and chemical industries. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-108. Producer or source: Sandvik.

UDIMET 520

Alloy Digest ◽  
1962 ◽  
Vol 11 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Elevated Temperatures ◽  
Base Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
Nickel Base

Abstract UDIMET 520 is a nickel-base alloy recommended for applications where high strength at elevated temperatures is required. It is suitable for service at temperatures up to 1800 F. This datasheet provides information on composition, physical properties, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-74. Producer or source: Special Metals Inc..

UDIMET 105

Alloy Digest ◽  
1972 ◽  
Vol 21 (7) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Elevated Temperatures ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
Temperature Performance ◽  
Nickel Base

Abstract UDIMET 105 is a nickel-base alloy which was developed for service at elevated temperatures. 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, joining, and surface treatment. Filing Code: Ni-175. Producer or source: Special Metals Corporation.

INCONEL 702

Alloy Digest ◽  
1958 ◽  
Vol 7 (3) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Elevated Temperatures ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
International Nickel Company ◽  
Nickel Base

Abstract INCONEL 702 is a nickel-base alloy having moderate strength with exceptional oxidation resistance at elevated temperatures. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-40. Producer or source: International Nickel Company Inc..

TECHALLOY WASPALOY

Alloy Digest ◽  
1977 ◽  
Vol 26 (4) ◽  
Keyword(s):  
Elevated Temperatures ◽  
Rupture Strength ◽  
Stress Rupture ◽  
High Strength ◽  
Heat Treating ◽  
Age Hardening ◽  
Solid Solution Strengthening ◽  
Solution Strengthening ◽  
Nickel Base ◽  
Corrosion And Oxidation

Abstract TECHALLOY WASPALOY, a nickel-base austenitic precipitation-hardenable alloy, derives its high strength at elevated temperatures from additions of the solid-solution strengthening elements molybdenum, cobalt and chromium and from aluminum and titanium which produce age hardening. Boron and zirconium additions also have been made to obtain optimum stress-rupture strength. It has excellent strength and good resistance to corrosion and oxidation at least to 1600 F. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-243. Producer or source: Techalloy Company Inc..

scholarly journals Comparison in Deformation Behavior, Microstructure, and Failure Mechanism of Nickel Base Alloy 625 under Two Strain Rates

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2652
Author(s):  
Meng Liu ◽  
Quanyi Wang ◽  
Yifan Cai ◽  
Dong Lu ◽  
Tianjian Wang ◽  
...  
Keyword(s):  
Strain Rate ◽  
Deformation Behavior ◽  
Tensile Deformation ◽  
Base Alloy ◽  
Inconel 625 ◽  
Tensile Fracture ◽  
Nickel Base Superalloy ◽  
Strain Rates ◽  
Tensile Fracture Surface ◽  
Nickel Base

Tensile deformation behavior and microstructure of nickel-base superalloy Inconel 625 are investigated under different strain rates of 5 × 10−4 s−1 and 5 × 10−5 s−1. According to the experimental results, yield strength and ultimate tensile strength of the alloy increase with the increase in strain rate in room temperature. Microstructure results indicate that the size of dimples is smaller in the tensile fracture surface at low strain rate than the high strain rate, and the number of dimples is also related to the strain rates and twins appear earlier in the specimens with higher strain rates. Apart from Hollomon and Ludwik functions, a new formula considering the variation trend of strength in different deformation stages is deduced and introduced, which fit closer to the tensile curves of the 625 alloy used in the present work at both strain rates. Furthermore, the Schmid factors of tensile samples under two strain rates are calculated and discussed. In the end, typical work hardening behavior resulting from the dislocations slip behavior under different strain rates is observed, and a shearing phenomenon of slip lines cross through the δ precipitates due to the movement of dislocations is also be note.

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