Small fatigue crack growth in metallic materials: A model and its application to engineering alloys

Amit Shyam; John E. Allison; Christopher J. Szczepanski; Tresa M. Pollock; J. Wayne Jones

doi:10.1016/j.actamat.2007.08.022

Small fatigue crack growth in metallic materials: A model and its application to engineering alloys

Amit Shyam, John E. Allison, Christopher J. Szczepanski, Tresa M. Pollock, J. Wayne Jones

Alloy Behavior & Design

Research output: Contribution to journal › Article › peer-review

75 Scopus citations

Abstract

Characterization of the growth behavior of small fatigue cracks is important for materials used in structurally demanding applications such as aircraft turbine discs and some automotive engine components. Here, we present a general, dislocation-based fracture mechanics approach to predict the growth rate of small fatigue cracks in metallic materials. The applicability of the model to the small fatigue crack growth behavior of four engineering alloys was examined. Small fatigue cracks were initiated and propagated, in a controlled manner, from micronotches fabricated by femtosecond pulsed laser micromachining. The results suggest that a methodology consisting of crack-tip damage accumulation and fracture provides a common framework to estimate the fatigue crack propagation lifetime of structural materials.

Original language	English
Pages (from-to)	6606-6616
Number of pages	11
Journal	Acta Materialia
Volume	55
Issue number	19
DOIs	https://doi.org/10.1016/j.actamat.2007.08.022
State	Published - Nov 2007

Funding

Various segments of this investigation at the University of Michigan were supported by NSF, DARPA, AFOSR and Ford Motor Company. We thank Christopher J. Torbet and Yoosuf N. Picard of the University of Michigan for assistance with the experiments. A.S. thanks Edgar Lara-Curzio (ORNL) for reading an initial draft of the manuscript.

Funders	Funder number
National Science Foundation
Air Force Office of Scientific Research
Defense Advanced Research Projects Agency
Ford Motor Company

Keywords

Fatigue
Metals and alloys
Modeling
Plastic deformation
Small fatigue crack growth

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.actamat.2007.08.022

Cite this

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abstract = "Characterization of the growth behavior of small fatigue cracks is important for materials used in structurally demanding applications such as aircraft turbine discs and some automotive engine components. Here, we present a general, dislocation-based fracture mechanics approach to predict the growth rate of small fatigue cracks in metallic materials. The applicability of the model to the small fatigue crack growth behavior of four engineering alloys was examined. Small fatigue cracks were initiated and propagated, in a controlled manner, from micronotches fabricated by femtosecond pulsed laser micromachining. The results suggest that a methodology consisting of crack-tip damage accumulation and fracture provides a common framework to estimate the fatigue crack propagation lifetime of structural materials.",

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AU - Jones, J. Wayne

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AB - Characterization of the growth behavior of small fatigue cracks is important for materials used in structurally demanding applications such as aircraft turbine discs and some automotive engine components. Here, we present a general, dislocation-based fracture mechanics approach to predict the growth rate of small fatigue cracks in metallic materials. The applicability of the model to the small fatigue crack growth behavior of four engineering alloys was examined. Small fatigue cracks were initiated and propagated, in a controlled manner, from micronotches fabricated by femtosecond pulsed laser micromachining. The results suggest that a methodology consisting of crack-tip damage accumulation and fracture provides a common framework to estimate the fatigue crack propagation lifetime of structural materials.

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Small fatigue crack growth in metallic materials: A model and its application to engineering alloys

Abstract

Funding

Keywords

UN SDGs

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