Fatigue Behavior and Life Prediction of an Equiaxed Crystal Nickel-Base Superalloy under Different Dwell Times and Strain Ratios

2014 ◽  
Vol 891-892 ◽  
pp. 1105-1110
Author(s):  
Hui Chen Yu ◽  
Cheng Li Dong ◽  
Ying Li
Keyword(s):  
Fatigue Life ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Complex Loading ◽  
Strain Ratio ◽  
Nickel Base Superalloy ◽  
Equiaxed Crystal ◽  
Nickel Base ◽  
Cyclic Damage ◽  
Base Superalloy

Strain-controlled low cycle fatigue (LCF) and creep-fatigue interaction (CFI) tests of an equiaxed crystal nicke-base superalloy were conducted at 850oC in order to investigate the effects of different dwell times and strain ratios on the fatigue behavior and life distribution. The cyclic damage accumulation (CDA) method and modified CDA method were employed to predict the fatigue life for the superalloy under complex loading condition, respectively. CDA method is employed to predict the fatigue life for the superalloy and the predicted fatigue life is within the scatter band of±6X. The fatigue life predicted by the modified CDA method agrees very well with the experimental fatigue life and the predicted fatigue life is well within the scatter band of±3X, which means that the modified CDA method is able to consider the influences of dwell time and strain ratio on the fatigue life for the superalloy.

scholarly journals Effect of Salt Coatings on Low Cycle Fatigue Behavior of Nickel -base Superalloy GTM-SU-718

2013 ◽  
Vol 55 ◽  
pp. 830-834 ◽  
Author(s):  
G.S. Mahobia ◽  
R.G. Sudhakar ◽  
Ajesh Antony ◽  
K. Chattopadhyay ◽  
N.C. Santhi Srinivas ◽  
...  
Keyword(s):  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Nickel Base Superalloy ◽  
Cycle Fatigue ◽  
Nickel Base ◽  
Base Superalloy

scholarly journals Low cycle fatigue behavior and life evaluation of a P/M nickel base superalloy under different dwell conditions

2010 ◽  
Vol 2 (1) ◽  
pp. 2103-2110 ◽  
Author(s):  
Huichen Yu ◽  
Ying Li ◽  
Xinyue Huang ◽  
Xueren Wu ◽  
Duoqi Shi ◽  
...  
Keyword(s):  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Nickel Base Superalloy ◽  
Cycle Fatigue ◽  
Life Evaluation ◽  
Nickel Base ◽  
Base Superalloy

Influence of hot corrosion on low cycle fatigue behavior of nickel base superalloy SU 263

2013 ◽  
Vol 51 ◽  
pp. 68-73 ◽  
Author(s):  
J.K. Sahu ◽  
R.K. Gupta ◽  
J. Swaminathan ◽  
N. Paulose ◽  
S.L. Mannan
Keyword(s):  
Hot Corrosion ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Nickel Base Superalloy ◽  
Cycle Fatigue ◽  
Nickel Base ◽  
Base Superalloy

High-Temperature Low-Cycle Fatigue Behavior of 625 Nickel-Base Superalloy Welding Joint

2014 ◽  
Vol 618 ◽  
pp. 120-124
Author(s):  
Yuan Yuan Wang ◽  
Bao Sen Wang ◽  
Li Jia Chen
Keyword(s):  
High Temperature ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Fatigue Cracks ◽  
Fatigue Properties ◽  
Nickel Base Superalloy ◽  
Cycle Fatigue ◽  
Welding Joint ◽  
Nickel Base ◽  
Base Superalloy

High temperature low cycle fatigue properties and fracture behavior of Inconel 625 nickel-base superalloy welding joint at 760oC were investigated under fully reversed total strain-controlled mode. The fatigue life and cyclic stress-strain data were analyzed to determine the individual strain fatigue parameters. It is noted that the welding joint exhibits the cyclic strain hardening and stability. The fatigue cracks initiate predominantly on the free surface of fatigue specimens and propagate in an intergranular mode or a mixed transgranular and intergranular mode.

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