Influence of Mo Addition on a Nickel-Base Single Crystal Superalloy

2014 ◽  
Vol 989-994 ◽  
pp. 264-266
Author(s):  
Kai Zhao
Keyword(s):  
Single Crystal ◽  
Rupture Strength ◽  
Lattice Misfit ◽  
Creep Rupture ◽  
Single Crystal Superalloy ◽  
Material Failure ◽  
Creep Rupture Strength ◽  
Tcp Phase ◽  
Nickel Base

The influence of minor Mo addition on the lattice misfit and creep rupture strength of a new single crystal superalloy have been investigated. It was shown that Mo can reduce the lattice misfit; increase the tendency of forming TCP phase; extend the time to material failure.

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

2015 ◽  
Vol 1088 ◽  
pp. 217-220 ◽  
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.

scholarly journals Creep Rupture Strength of Re and Ru Containing Experimental Nickel-Base Superalloys

2011 ◽  
Vol 278 ◽  
pp. 339-344 ◽  
Author(s):  
Astrid Heckl ◽  
Ralf Rettig ◽  
Robert F. Singer
Keyword(s):  
Creep Resistance ◽  
Liquidus Temperature ◽  
Rupture Strength ◽  
Systematic Investigation ◽  
Creep Rupture ◽  
Creep Rupture Strength ◽  
Creep Data ◽  
Alloy Series ◽  
Nickel Base Superalloys ◽  
Nickel Base

The influence of Re and Ru on creep rupture strength has been investigated using a new in-house designed alloy-series comprising 9 experimental nickel-base superalloys with stepwise increased Re and Ru additions. The presented creep data reveals a significant increase in creep rupture strength by additions of Re. For additions of Ru an increase of creep rupture strength can only be found for low Re contents. The present article, which is part of an extensive and systematic investigation on Re and Ru influences, shows, that an improved creep resistance by an influence of Re and Ru on the γ’-solvus temperature is rather improbable. Likewise, the influence of Re and Ru on liquidus temperature is not expected to play an important role. However, the creep rupture strength is suggested to be highly modified by γ/γ’-microstructure changes.

Numerical simulation of γ/γ′ microstructural evolutions induced by TCP-phase in the MC2 nickel base single crystal superalloy

2011 ◽  
Vol 528 (6) ◽  
pp. 2620-2634 ◽  
Author(s):  
J.-B. le Graverend ◽  
J. Cormier ◽  
P. Caron ◽  
S. Kruch ◽  
F. Gallerneau ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Single Crystal ◽  
Single Crystal Superalloy ◽  
Tcp Phase ◽  
Nickel Base

Statistical Analysis and Reliability Prediction of Creep Rupture Strength and Life for DZ125 Superalloy

2015 ◽  
Vol 750 ◽  
pp. 133-138
Author(s):  
Cheng Li Dong ◽  
Ying Li ◽  
Hui Chen Yu
Keyword(s):  
Master Curve ◽  
Rupture Strength ◽  
Turbine Blades ◽  
Creep Rupture ◽  
Nickel Base Superalloy ◽  
Creep Rupture Strength ◽  
Chi Square ◽  
Nickel Base ◽  
Term Creep

This paper presents the reliability analysis of the creep rupture strength and long-term life of a directionally solidified nickel-base superalloy, DZ125, which is widely used for manufacturing turbine blades of advanced aeroengines. A number of creep rupture experiments of DZ125 alloy are carried out at 760oC, 850oC, 980oC and 1040oC. Larson-Miller (L-M for short) parameter is used to predict the long-term creep life and a master curve in the L-M parameter is obtained. A “Z-parameter” model is employed to characterize the magnitude of the deviation of the creep rupture data to a master curve. The “Z-parameter” of DZ125 alloy followed Gaussian distribution which is verified by Chi-square testing. Based on the “Z-parameter” model, the curves of Stress-TTP (i.e. Time-temperature parameter)-Reliability, Stress-Life-Reliability and Allowable Stress-Temperature-Reliability are obtained to predict the creep rupture strength and life for DZ125 alloy.

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