Microstructure of nickel base high temperature alloy after low cycle fatigue

1991 ◽  
Vol 46 (9) ◽  
pp. 67
Keyword(s):  
High Temperature ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue ◽  
High Temperature Alloy ◽  
Nickel Base

Low-cycle fatigue of a VZh175 high-temperature alloy under elastoplastic deformation conditions

2015 ◽  
Vol 2015 (4) ◽  
pp. 317-323 ◽  
Author(s):  
M. S. Belyaev ◽  
V. F. Terent’ev ◽  
M. M. Bakradze ◽  
M. A. Gorbovets ◽  
M. A. Gol’dberg
Keyword(s):  
High Temperature ◽  
Elastoplastic Deformation ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue ◽  
High Temperature Alloy

Comparative Study of Microstructure and High Temperature Low Cycle Fatigue Behaviour of Nickel Base Superalloys Inconel 713LC and MAR-M247

2016 ◽  
Vol 713 ◽  
pp. 86-89 ◽  
Author(s):  
Ivo Šulák ◽  
Karel Obrtlík ◽  
Ladislav Čelko
Keyword(s):  
High Temperature ◽  
Fatigue Life ◽  
Low Cycle Fatigue ◽  
Strain Curve ◽  
Cyclic Stress ◽  
Fatigue Tests ◽  
Casting Defects ◽  
Cycle Fatigue ◽  
Stress Strain Curve ◽  
Nickel Base

The present work is focused on the study of microstructure and low cycle fatigue behavior of the first generation nickel-base superalloy IN 713LC (low carbon) and its promising second generation successor MAR-M247 HIP (hot isostatic pressing) at 900 °C. Microstructure of both alloys was studied by means of scanning electron microscopy (SEM). The microstructure of both materials is characterized by dendritic grains, carbides and casting defects. Size and morphology of precipitates and casting defects were evaluated. Fractographic observations have been made with the aim to reveal the fatigue crack initiation place and relation to the casting defects and material microstructure. Low cycle fatigue tests were conducted on cylindrical specimens in symmetrical push-pull cycle under strain control with constant total strain amplitude and strain rate at 900 °C in air. Hardening/softening curves, cyclic stress-strain curve and fatigue life data of both materials were obtained. Cyclic stress-strain curve of MAR M247 is shifted approximately to 120 MPa higher stress amplitudes in comparison with IN 713LC. Significantly higher fatigue life of MAR-M247 has been observed in Basquin representation. On the other hand IN 713LC shows prolonged lifetime compared with MAR-M247 in the Coffin-Manson representation. Results obtained from high temperature low cycle fatigue tests are discussed.

High temperature creep and low cycle fatigue of a nickel-base superalloy

2010 ◽  
Vol 527 (9) ◽  
pp. 2379-2389 ◽  
Author(s):  
Jinjiang Yu ◽  
Xiaofeng Sun ◽  
Tao Jin ◽  
Nairen Zhao ◽  
Hengrong Guan ◽  
...  
Keyword(s):  
High Temperature ◽  
Low Cycle Fatigue ◽  
Nickel Base Superalloy ◽  
High Temperature Creep ◽  
Cycle Fatigue ◽  
Temperature Creep ◽  
Nickel Base ◽  
Base Superalloy
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