scholarly journals Fatigue crack growth in a particulate TiB2-reinforced powder metallurgy iron-based composite

2003 ◽  
Vol 34 (9) ◽  
pp. 2017-2024 ◽  
Author(s):  
N. Yang ◽  
I. Sinclair
Keyword(s):  
Fatigue Crack ◽  
Powder Metallurgy ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Iron Based ◽  
Metallurgy Iron

Evaluating the Critical Temperature of Creep-Fatigue Interaction a Nickel-Based Powder Metallurgy Superalloy

2013 ◽  
Vol 577-578 ◽  
pp. 625-628
Author(s):  
Hao Liu ◽  
Rui Bao ◽  
Wei Ming Lei ◽  
Bin Jun Fei
Keyword(s):  
Fatigue Crack ◽  
Critical Temperature ◽  
Powder Metallurgy ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Elevated Temperatures ◽  
Fatigue Loading ◽  
Damage Mechanism ◽  
Creep Fatigue ◽  
Creep Fatigue Crack

For the components working in high temperature and enduring fatigue loading, the fatigue fracture properties will be reduced remarkably when the working temperature is higher than the critical temperature of creep-fatigue interactionTcof the material. In consequence, the damage mechanism from creep-fatigue interaction becomes more complex. A method is presented in this paper to determine theTcof a nickel-based powder metallurgy superalloy. Pure fatigue crack growth and creep-fatigue crack growth tests were conducted in several different elevated temperatures. The fracture mechanism was investigated via observing the fractographic characteristics using scanning electron microscope (SEM). The test results show that theTcof this superalloy is a little bit lower than a half of the melting temperatureTm.

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