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Short fatigue crack initiation at inclusions
Date
1997-04-23
Author
Kaynak, Cevdet
Metadata
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In this study, the initiation and early growth behaviour of short fatigue cracks in En7A steel with a high content of elongated MnS inclusions was investigated, by generating and evaluating data on the growth of short fatigue cracks under various stress levels and stress ratios for the six principal specimen orientations. Short cracks usually initiated at the debonded interfaces between the matrix and the inclusions. If there was no debonding, cracking sometimes occurred in the inclusions. In the early stages, short cracks propagated by a mechanism of inclusion influenced growth. Under low stress levels, usually one short crack was initiated which dominated most of the fatigue life, while under high stress levels there was multicrack interaction.
URI
https://hdl.handle.net/11511/55272
Conference Name
5th European Conference on Advanced Materials and Processes and Applications (EUROMAT 97)
Collections
Department of Metallurgical and Materials Engineering, Conference / Seminar
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Initiation and early growth of short fatigue cracks at inclusions
Kaynak, Cevdet; Baker, TJ (Informa UK Limited, 1996-05-01)
In this study, the initiation and early growth behaviour of short fatigue cracks in En7A steel with a high content of elongated MnS inclusions was investigated by generating and evaluating data on the growth of short fatigue cracks under various stress levels and stress ratios for the six principal specimen orientations. Short cracks usually initiated at the debonded interfaces between the matrix and the inclusions. If there was no debonding, cracking sometimes occurred in the inclusions. In the early stage...
Inclusion induced anisotropy of short fatigue crack growth in steel
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In this study, the growth behaviour of short fatigue cracks in En7A steel with a high content of elongated MnS inclusions was investigated by generating and evaluating the short crack data under different loading conditions for the six principal specimen orientations. Short cracks showed a strong anisotropic behaviour in which they grew much faster in the transverse and short transverse orientations than in the longitudinal orientations in all fatigue processes. This was due to the relatively high content o...
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Kaynak, Cevdet; Baker, T.J. (1996-01-01)
In this study, the growth behaviour of short fatigue cracks in En7A steel with a high content of elongated MnS inclusions has been investigated by generating and evaluating short crack growth data for the six principal specimen orientations. The anomalous initiation and growth behaviour of short cracks was also compared with that of long crack data for the same material and loading conditions determined before. This comparison revealed the sub-threshold initiation and faster growth rate of short cracks comp...
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C. Kaynak, “Short fatigue crack initiation at inclusions,” presented at the 5th European Conference on Advanced Materials and Processes and Applications (EUROMAT 97), MAASTRICHT, NETHERLANDS, 1997, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55272.
