Microstructurally small fatigue crack propagation and retardation at grain boundary in a polycrystalline Ni-base superalloy

2018 ◽  
Vol 2018 (0) ◽  
pp. OS0819
Author(s):  
Masafumi MATSUNAMI ◽  
Motoki SAKAGUCHI ◽  
Hideaki KANEKO ◽  
Takanori KARATO ◽  
Kenta SUZUKI ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Grain Boundary ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Small Fatigue Crack ◽  
Base Superalloy

Description of Small Fatigue Crack Propagation in ODS Steel

2014 ◽  
Vol 891-892 ◽  
pp. 911-916
Author(s):  
Pavel Hutař ◽  
Ivo Kuběna ◽  
Miroslav Šmíd ◽  
Martin Ševčík ◽  
Tomáš Kruml ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Fatigue Testing ◽  
Low Cycle Fatigue ◽  
High Stress ◽  
Oxide Dispersion Strengthened ◽  
Ods Steel ◽  
Small Fatigue Crack ◽  
Propagation Law

The oxide dispersion strengthened (ODS) steels are widely studied as possible candidate material for fission and fusion technology. Due to application of the ODS materials, mainly low cycle fatigue is important. Therefore, small crack initiation and propagation for rather high stress amplitude are in focus. The main aim of the presented work is description of the small fatigue crack propagation for ODS-EUROFER steel. Due to limited quantity of ODS steel special miniaturized cylindrical specimens for fatigue testing were designed. Crack propagation law based on plastic part of J-integral is presented and applied for mentioned material. The resulting fatigue crack propagation rates for ODS-EUROFER steel and EUROFER 97 are compared and discussed.

Fatigue Crack Propagation and Grain Boundary

1996 ◽  
Vol 207-209 ◽  
pp. 609-612
Author(s):  
S. Hashimoto ◽  
Alexei Vinogradov ◽  
Sei Miura
Keyword(s):  
Fatigue Crack ◽  
Grain Boundary ◽  
Crack Propagation ◽  
Fatigue Crack Propagation
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