scholarly journals Prediction of Creep Rupture Life in Nickel-Base Superalloys Using Bayesian Neural Network

1999 ◽  
Vol 63 (7) ◽  
pp. 905-911 ◽  
Author(s):  
Hidetoshi Fujii ◽  
David J. C. MacKay ◽  
Harshad K. D. H. Bhadeshia ◽  
Hiroshi Harada ◽  
Kiyoshi Nogi
Keyword(s):  
Neural Network ◽  
Rupture Life ◽  
Creep Rupture ◽  
Bayesian Neural Network ◽  
Nickel Base Superalloys ◽  
Nickel Base

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.

Precipitation Behavior during Ageing Treatment of a Single Crystal Nickel-Base Superalloy

2005 ◽  
Vol 475-479 ◽  
pp. 673-676
Author(s):  
D.Y. Yang ◽  
Tao Jin ◽  
Na Ru Zhao ◽  
Zhi Wang ◽  
Xiao Feng Sun ◽  
...  
Keyword(s):  
Single Crystal ◽  
Rupture Life ◽  
Creep Rupture ◽  
Nickel Base Superalloy ◽  
Microstructural Stability ◽  
Precipitation Behavior ◽  
Σ Phase ◽  
Ageing Treatment ◽  
Nickel Base ◽  
Base Superalloy

The precipitation behavior during ageing treatment of a single crystal nickel-base superalloy was investigated by SEM and TEM. The results showed that tetragonal needle-like σ phase and blocky -W phase precipitated during low temperature ageing treatment after this testing alloy was completely solution heat treated. σ and -W phases robbed of solid solution strengthening alloying element W、Mo in the matrix and degraded high temperature creep rupture property severely. The creep curve of the crystal tested at 1010 °C and 248 MPa exhibited that the steady state creep rate ε was as high as 9.46 × 10-3/h. The creep-rupture life was only 25 hours. -W phase was not formed by decrease of W content properly. A relatively low level of Co could inhibit σ phase precipitation and improve microstructural stability.

scholarly journals Estimation of the .GAMMA. and .GAMMA.' Lattice Parameters in Nickel-base Superalloys Using Neural Network Analysis.

1998 ◽  
Vol 38 (5) ◽  
pp. 495-502 ◽  
Author(s):  
S. Yoshitake ◽  
V. Narayan ◽  
H. Harada ◽  
H. K. D. H. Bhadeshia ◽  
D. J. C. Mackay
Keyword(s):  
Neural Network ◽  
Network Analysis ◽  
Lattice Parameters ◽  
Neural Network Analysis ◽  
Nickel Base Superalloys ◽  
Nickel Base
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