High Temperature Mechanical Properties of CMSX4+Yttrium Single-Crystal Nickel-Base Superalloys SRR 99 and CMX-4

1992 ◽  
Author(s):  
M. Marchionni ◽  
D. Goldschmidt ◽  
M. Maldini
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Single Crystal ◽  
High Temperature Mechanical Properties ◽  
Nickel Base Superalloys ◽  
Nickel Base

Nickel Base Superalloys Single Crystal Growth Technology for Large Size Buckets in Heavy Duty Gas Turbines

1991 ◽  
Author(s):  
Akira Yoshinari ◽  
Katsumi Iijima ◽  
Hideyo Kodama ◽  
Kimio Kano ◽  
Hiroyuki Matsuzaki
Keyword(s):  
Crystal Growth ◽  
High Temperature ◽  
Single Crystal ◽  
Gas Turbines ◽  
Single Crystal Growth ◽  
High Temperature Strength ◽  
Cross Sectional ◽  
High Temperature Mechanical Properties ◽  
Nickel Base Superalloys ◽  
Nickel Base

A larger size bucket with superior high temperature strength is required for future land based gas turbines. From the viewpoint of high temperature mechanical properties, single crystal alloys are rather promising. To grow larger sized single crystals of nickel base superalloys, a two stage heating and bypass process in which single crystal growth paths are incorporated into large cross sectional positions such as platforms has been developed. It results in successful single crystal growth of alloys for buckets with a total length of 170mm and large lateral cross section. Characteristics of single crystal buckets made by the bypass process and properties of an alumina mold prepared for a single crystal casting are described herein.

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.

Modelling of High Temperature Oxidation of Alumina-Forming Single-Crystal Nickel-Base Superalloys

2012 ◽  
Vol 60 (15) ◽  
pp. 5468-5480 ◽  
Author(s):  
M. Bensch ◽  
A. Sato ◽  
N. Warnken ◽  
E. Affeldt ◽  
R.C. Reed ◽  
...  
Keyword(s):  
High Temperature ◽  
Single Crystal ◽  
High Temperature Oxidation ◽  
Temperature Oxidation ◽  
Nickel Base Superalloys ◽  
Nickel Base

scholarly journals The Effect of the Cooling Rates on the Microstructure and High-Temperature Mechanical Properties of a Nickel-Based Single Crystal Superalloy

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4256
Author(s):  
Xiao-Yan Wang ◽  
Meng Li ◽  
Zhi-Xun Wen
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Single Crystal ◽  
Solution Treatment ◽  
Single Crystal Superalloy ◽  
Air Cooling ◽  
Strengthening Effect ◽  
Cooling Rates ◽  
High Temperature Mechanical Properties ◽  
High Temperature Tensile

The as-cast alloy of nickel-based single-crystal superalloy was used as the research object. After four hours of solution treatment at 1315 °C, four cooling rates (water cooling (WC), air cooling (AC) and furnace cooling (FC1/FC2)) were used to reduce the alloy to room temperature. Four different microstructures of nickel-based superalloy material were prepared. A high-temperature tensile test at 980 °C was carried out to study the influence of various rates on the formation of the material’s microstructure and to further obtain the influence of different microstructures on the high-temperature mechanical properties of the materials. The results show that an increase of cooling rate resulted in a larger γ′ phase nucleation rate, formation of a smaller γ′ phase and a greater number. When air cooling was used, the uniformity of the γ′ phase and the coherence relationship between the γ′ phase and the γ phase were the best. At the same time, the test alloy had the best high-temperature tensile properties, and the material showed a certain degree of plasticity. TEM test results showed that the test alloy mainly blocked dislocations from traveling in the material through the strengthening effect of γ′, and that AC had the strongest hindering effect on γ′ dislocation movement.

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