Effect of section thickness on creep and stress rupture behaviour of DS CM247 nickel base superalloy

2008 ◽  
Vol 25 (1) ◽  
pp. 17-26 ◽  
Author(s):  
D.V.V. Satyanarayana ◽  
C.M. Omprakash ◽  
B. Jagadeesan ◽  
Niranjan Das
Keyword(s):  
Stress Rupture ◽  
Nickel Base Superalloy ◽  
Section Thickness ◽  
Creep And Stress Rupture ◽  
Nickel Base ◽  
Base Superalloy

Stress Rupture Behavior of a Dispersion Strengthened Superalloy

1973 ◽  
Vol 95 (1) ◽  
pp. 10-14 ◽  
Author(s):  
R. L. Cairns ◽  
J. S. Benjamin
Keyword(s):  
Rupture Life ◽  
Stress Rupture ◽  
Nickel Base Superalloy ◽  
Dispersion Strengthening ◽  
Rupture Stress ◽  
Temperature Changes ◽  
Temperature Range ◽  
New Process ◽  
Nickel Base ◽  
Base Superalloy

A dispersion strengthened nickel-base superalloy, designated IN-853, has been made by a new process called “Mechanical Alloying.” This provides a long sought combination of properties typical of dispersion strengthened and precipitation hardened materials. The alloy has flat rupture curves over a wide temperature range. Rupture stress/temperature curves for the alloy show a transition separating the low temperature regime where precipitation hardening controls the strength, and the high temperature range where dispersion strengthening predominates. The slope of a Larson-Miller plot of stress rupture test data also decreases at high values of that parameter. At high temperatures rupture stress is less sensitive to temperature changes than is the case with conventional nickel-base superalloys. At a fixed stress level the rupture life of the dispersion strengthened superalloy is more sensitive to temperature changes.

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.

Sign in / Sign up

Export Citation Format

Share Document