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Influence of grain size on the small fatigue crack initiation and propagation behaviors of a nickel-based superalloy at 650 °C
- Source :
- Journal of Materials Science & Technology. 35:1607-1617
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- GH4169 at 650 °C in atmosphere was investigated by using single edge notch tensile specimens. The number of main cracks and crack initiation mechanisms at the notch surface strongly depended on the grain size. The crack initiation life accounted for more percentages of the total fatigue life for the alloy with smaller grain size. The fatigue life generally increased with increasing crack initiation life. The small crack transited to long crack when its length reached ˜10 times the grain size.
- Subjects :
- Materials science
Polymers and Plastics
Mechanical Engineering
Alloy
Metals and Alloys
Fatigue testing
02 engineering and technology
Nickel based
Edge (geometry)
engineering.material
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Grain size
0104 chemical sciences
Superalloy
Mechanics of Materials
mental disorders
Ultimate tensile strength
Crack initiation
Materials Chemistry
Ceramics and Composites
engineering
Composite material
0210 nano-technology
Subjects
Details
- ISSN :
- 10050302
- Volume :
- 35
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Science & Technology
- Accession number :
- edsair.doi...........1ec1be049155e6096f4c035e6106aa69