Fatigue and Fracture
Fatigue Crack Nucleation and Microstructure
This article presents an overview of fatigue crack nucleation from the point of view of the material microstructure and its evolution during cycling. It describes the sites of microcrack nucleation at the free surfaces. The article discusses the relation of dislocation structures and surface relief and reviews the mechanisms of crack nucleation. The damage of material due to crack nucleation, the extent (in terms of the number of cycles) of the nucleation stage, and the factors influencing crack nucleation are discussed.
Petr Lukáš, Fatigue Crack Nucleation and Microstructure, Fatigue and Fracture, Vol 19, ASM Handbook, By ASM Handbook Committee, ASM International, 1996, p 96–109, https://doi.org/10.31399/asm.hb.v19.a0002355
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New Handbook: Volume 11B
Now available in the Digital Library! Volume 11B serves as a reference and guide to help engineers determine the causes of failure in plastic components and make corrective adjustments through design and manufacturing modifications.