Microstructural Degradation and the Effects on Creep Properties of a Hot Corrosion-Resistant Single-Crystal Ni-Based Superalloy During Long-Term Thermal Exposure

Two different, non-Re containing single crystal (SX) superalloys are defined primarily for industrial turbine application. The alloys, CMSX®-11B and CMSX-®-11C, contain respective chromium levels of about 12.5% and 14.5%. Both materials develop unique and extremely good blends of hot corrosion and oxidation resistance. They exhibit extremely good testability, employ relatively simple solution heat treatments and provide creep strength which is as good or better in comparison to other first generation SX materials such as CMSX-2/3, PWA 1480 and René N4. Moreover, at certain engine-pertinent temperature/stress conditions, and particularly in long-term tests (greater than 1,000 hours duration), the alloys appear to exhibit density corrected rupture strengths which are similar or better than CMSX-4® and other second generation SX casting superalloys.

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Microstructure stability and mechanical properties of a new low cost hot-corrosion resistant Ni–Fe–Cr based superalloy during long-term thermal exposure

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2014.12.030 ◽

2015 ◽

Vol 69 ◽

pp. 70-80 ◽

Cited By ~ 24

Author(s):

Wen Sun ◽

Xuezhi Qin ◽

Jianting Guo ◽

Langhong Lou ◽

Lanzhang Zhou

Keyword(s):

Mechanical Properties ◽

Hot Corrosion ◽

Low Cost ◽

Thermal Exposure ◽

Corrosion Resistant ◽

Microstructure Stability

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Effects of Ta on the solidification behavior and microstructure of a rhenium-containing hot corrosion resistant single crystal

International Journal of Minerals Metallurgy and Materials ◽

10.1007/s12613-019-1817-6 ◽

2019 ◽

Vol 26 (7) ◽

pp. 901-907 ◽

Cited By ~ 1

Author(s):

Shi-hua Ma ◽

Hong-quan Hao ◽

Dong Wang ◽

Lang-hong Lou ◽

Jian Zhang

Keyword(s):

Single Crystal ◽

Hot Corrosion ◽

Solidification Behavior ◽

Corrosion Resistant

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The Microstructure Evolution of a Nickel-Base Single Crystal Superalloy after Long-Term Aging

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1088.217 ◽

2015 ◽

Vol 1088 ◽

pp. 217-220 ◽

Cited By ~ 1

Author(s):

Yu Xian Jia

Keyword(s):

Single Crystal ◽

Exposure Time ◽

Microstructure Evolution ◽

Ageing Time ◽

Thermal Exposure ◽

Single Crystal Superalloy ◽

Phase Precipitation ◽

Tcp Phase ◽

Nickel Base

Microstructure evolution of a nickel-base single crystal superalloy during thermal exposure at 982°C was investigated. The SEM studies revealed that the size of γ' phase increased and some of which linked together with the elongation of the exposure time. There is acicular phase precipitation after the long-term ageing treatment. The TCP phase is not increased by the increment of ageing time after reaching a certain amount. There are skeleton shape carbides precipitate after 100h and 300h. The amount of precipitated carbides decreases by the elongation of ageing time.

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