Modeling Creep-Fatigue Deformation of Ni-Base Superalloys Using Crystal Viscoplasticity

2011 ◽  
Vol 8 (5) ◽  
pp. 103674 ◽  
Author(s):  
R. W. Neu ◽  
D. J. Smith ◽  
A. Saxena ◽  
B. Dogan ◽  
S. W. Dean
Keyword(s):  
Creep Fatigue ◽  
Modeling Creep ◽  
Fatigue Deformation

Revealing the creep-fatigue deformation mechanism for a directionally-solidified Ni-based superalloy DZ445 at 900 °C

2018 ◽  
Vol 5 (7) ◽  
pp. 076513 ◽  
Author(s):  
Biao Ding ◽  
Weili Ren ◽  
Jianchao Peng ◽  
Yunbo Zhong ◽  
Fei Li ◽  
...  
Keyword(s):  
Deformation Mechanism ◽  
Directionally Solidified ◽  
Creep Fatigue ◽  
Fatigue Deformation

An Abnormal Increase of Fatigue Life with Dwell Time during Creep-Fatigue Deformation for Directionally Solidified Ni-Based Superalloy DZ445

2018 ◽  
Vol 37 (3) ◽  
pp. 277-284 ◽  
Author(s):  
Biao Ding ◽  
Weili Ren ◽  
Kang Deng ◽  
Haitao Li ◽  
Yongchun Liang
Keyword(s):  
Fatigue Life ◽  
Hysteresis Loop ◽  
Dwell Time ◽  
Fatigue Behavior ◽  
Maximum Energy ◽  
Abnormal Behavior ◽  
Directionally Solidified ◽  
Creep Fatigue ◽  
Abnormal Increase ◽  
Fatigue Deformation

AbstractThe paper investigated the creep-fatigue behavior for directionally solidified nickel-based superalloy DZ445 at 900 °C. It is found that the fatigue life shows an abnormal increase when the dwell time exceeds a critical value during creep-fatigue deformation. The area of hysteresis loop and fractograph explain the phenomenon quite well. The shortest life corresponds to the maximal area of hysteresis loop, i. e. the maximum energy to be consumed during the creep-fatigue cycle. The fractographic observation of failed samples further supports the abnormal behavior of fatigue life.

Intergranular cracking under creep-fatigue deformation in lamellar TiAl alloy

2002 ◽  
Vol 53 (6) ◽  
pp. 392-399 ◽  
Author(s):  
Young Sam Park ◽  
Soo Woo Nam ◽  
Sun Keun Hwang
Keyword(s):  
Tial Alloy ◽  
Intergranular Cracking ◽  
Creep Fatigue ◽  
Fatigue Deformation
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